create runner game
This commit is contained in:
parent
fb0351cfe6
commit
42eda85fd0
7 changed files with 1206 additions and 1 deletions
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@ -480,7 +480,7 @@ uint8_t ssd1306_init(void)
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}
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// clear display
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// ssd1306_setbuf(0);
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ssd1306_setbuf(0);
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ssd1306_refresh();
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return 0;
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11
soweli/Makefile
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11
soweli/Makefile
Normal file
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@ -0,0 +1,11 @@
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all : flash
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TARGET:=soweli
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CH32V003FUN:=../../ch32v003fun/ch32v003fun
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include ../../ch32v003fun/ch32v003fun/ch32v003fun.mk
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flash : build
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gdb-multiarch -x ../gdbinit -ex 'load' -ex 'detach' -ex 'quit' $(TARGET).elf
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clean : cv_clean
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80
soweli/data.h
Normal file
80
soweli/data.h
Normal file
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@ -0,0 +1,80 @@
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#define OBSTACLE_TYPES 5
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const unsigned char soweli_a[8] = {
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0b01111111,
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0b10000000,
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0b10101000,
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0b10101000,
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0b10000000,
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0b01010101,
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0b01010000,
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0b01010000,
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};
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const unsigned char soweli_b[8] = {
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0b01111111,
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0b10000000,
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0b10101000,
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0b10101000,
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0b10000000,
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0b01010101,
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0b00000101,
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0b00000101,
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};
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const unsigned char obstacle_sprites[OBSTACLE_TYPES][8] = {
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{
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0b00000000,
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0b00000000,
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0b01010101,
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0b01010100,
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0b11111110,
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0b01010100,
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0b01010101,
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0b00000000,
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},
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{
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0b00000000,
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0b00000000,
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0b00000000,
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0b00000000,
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0b00111100,
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0b01100110,
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0b11000011,
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0b10000001,
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},
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{
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0b00000000,
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0b00000000,
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0b00000000,
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0b00000000,
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0b11111111,
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0b01000010,
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0b01000010,
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0b01000010,
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},
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{
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0b01000010,
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0b00011000,
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0b00100100,
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0b01111110,
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0b00100100,
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0b01111110,
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0b00100100,
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0b00011000,
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},
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{
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0b00000000,
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0b00000000,
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0b00000000,
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0b00011000,
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0b00011000,
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0b00011000,
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0b00011000,
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0b00111100,
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},
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};
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const unsigned char obstacle_heights[OBSTACLE_TYPES] = {6, 4, 4, 8, 5};
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const unsigned char obstacle_widths[OBSTACLE_TYPES] = {8, 8, 8, 7, 5};
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7
soweli/funconfig.h
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7
soweli/funconfig.h
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@ -0,0 +1,7 @@
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#ifndef _FUNCONFIG_H
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#define _FUNCONFIG_H
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#define CH32V003 1
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#endif
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255
soweli/soweli.c
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255
soweli/soweli.c
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@ -0,0 +1,255 @@
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#define SSD1306_128X32
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#include "ch32v003fun.h"
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#include <stdio.h>
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#include "ssd1306_i2c.h"
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#include "ssd1306.h"
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#include "data.h"
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#define PIN_LED PC4
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#define PIN_BTN PC7
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// #define JUMP_POWER 48
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// #define GRAVITY 3
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#define JUMP_POWER 36
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#define GRAVITY 2
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#define SCROLL_SPEED 1
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#define FRAME_DELAY 1000 / 60
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#define SCORE_DIGITS 4
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#define RUN_ANIM_SPEED 4
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#define PLAYER_X 16
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#define Y_PRECISION 4
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u32 time = 0;
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u16 score = 0;
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u16 highscore = 0;
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s16 player_y = 0;
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s16 player_vel = 0;
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#define MAX_OBSTACLES 16
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u8 obstacle_positions[MAX_OBSTACLES];
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u8 obstacle_types[MAX_OBSTACLES]; // todo
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u8 obstacle_count = 0;
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u8 is_running = 1;
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u8 time_to_obstacle = 0;
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uint32_t lfsr = 1; // PRNG state
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u8 rand8();
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void update();
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void render();
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void restart();
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int main()
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{
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SystemInit();
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funGpioInitAll();
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funPinMode(PIN_LED, GPIO_CFGLR_OUT_10Mhz_PP);
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funPinMode(PIN_BTN, GPIO_CFGLR_IN_PUPD);
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ssd1306_i2c_init();
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ssd1306_init();
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restart();
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while (1)
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{
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ssd1306_refresh();
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if (is_running)
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update();
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render();
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time += 1;
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if (funDigitalRead(PIN_BTN))
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{
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if (is_running)
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{
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if (player_y == 0 && player_vel == 0)
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{
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player_vel = JUMP_POWER;
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}
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}
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else
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restart();
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}
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if (is_running == 0)
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{
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funDigitalWrite(PIN_LED, (time >> 2) & 1);
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}
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else
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{
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funDigitalWrite(PIN_LED, FUN_LOW);
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}
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Delay_Ms(FRAME_DELAY);
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}
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}
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void restart()
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{
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lfsr = SysTick->CNT;
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is_running = 1;
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player_vel = 0;
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player_y = 0;
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obstacle_count = 0;
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time_to_obstacle = 0;
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if (highscore < score)
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highscore = score;
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score = 0;
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}
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void remove_obstacle()
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{
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if (obstacle_count == 0)
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return;
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for (u8 i = 1; i < obstacle_count; i++)
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{
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obstacle_positions[i - 1] = obstacle_positions[i];
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obstacle_types[i - 1] = obstacle_types[i];
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}
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obstacle_count--;
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}
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void spawn_obstacle(u8 pos)
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{
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if (obstacle_count >= MAX_OBSTACLES)
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return;
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obstacle_positions[obstacle_count] = pos;
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obstacle_types[obstacle_count] = rand8() % OBSTACLE_TYPES;
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obstacle_count++;
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}
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void update()
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{
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score += (time & 4) != 0;
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if (player_vel != 0 || player_y != 0)
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{
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player_vel -= GRAVITY;
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player_y += player_vel;
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if (player_y < 0)
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{
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player_y = 0;
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player_vel = 0;
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}
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}
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for (u8 i = 0; i < obstacle_count; i++)
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{
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obstacle_positions[i] -= SCROLL_SPEED;
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u8 type = obstacle_types[i];
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u8 dist_x = gfx_abs((s16)obstacle_positions[i] - (s16)PLAYER_X);
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if (dist_x < obstacle_widths[type] && (player_y >> Y_PRECISION) < obstacle_heights[type])
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{
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is_running = 0;
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}
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}
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if (obstacle_count > 0 && obstacle_positions[0] == 0)
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{
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remove_obstacle();
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}
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if (time_to_obstacle < 5)
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{
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u8 count = 1 + (rand8() & rand8() & 1) + (rand8() & rand8() & rand8() & rand8() & 1);
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for (u8 i = 0; i < count; i++)
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{
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spawn_obstacle(128 + i * 8);
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}
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time_to_obstacle = (rand8() & 31) + 50;
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}
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time_to_obstacle -= 1;
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}
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void render_digit(u8 digit, u8 x, u8 y)
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{
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const u16 digit_font[] = {
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0b111101101101111, // 0
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0b010110010010111, // 1
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0b111001111100111, // 2
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0b111001111001111, // 3
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0b101101111001001, // 4
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0b111100111001111, // 5
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0b111100111101111, // 6
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0b111001001001001, // 7
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0b111101111101111, // 8
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0b111101111001111, // 9
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};
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u16 pixels = digit_font[digit];
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ssd1306_drawPixel(x + 0, y + 0, (pixels >> 14) & 1);
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ssd1306_drawPixel(x + 1, y + 0, (pixels >> 13) & 1);
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ssd1306_drawPixel(x + 2, y + 0, (pixels >> 12) & 1);
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ssd1306_drawPixel(x + 0, y + 1, (pixels >> 11) & 1);
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ssd1306_drawPixel(x + 1, y + 1, (pixels >> 10) & 1);
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ssd1306_drawPixel(x + 2, y + 1, (pixels >> 9) & 1);
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ssd1306_drawPixel(x + 0, y + 2, (pixels >> 8) & 1);
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ssd1306_drawPixel(x + 1, y + 2, (pixels >> 7) & 1);
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ssd1306_drawPixel(x + 2, y + 2, (pixels >> 6) & 1);
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ssd1306_drawPixel(x + 0, y + 3, (pixels >> 5) & 1);
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ssd1306_drawPixel(x + 1, y + 3, (pixels >> 4) & 1);
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ssd1306_drawPixel(x + 2, y + 3, (pixels >> 3) & 1);
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ssd1306_drawPixel(x + 0, y + 4, (pixels >> 2) & 1);
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ssd1306_drawPixel(x + 1, y + 4, (pixels >> 1) & 1);
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ssd1306_drawPixel(x + 2, y + 4, (pixels >> 0) & 1);
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}
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void render_number(u32 s, u8 x, u8 y, u8 digits)
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{
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u8 painter_x = x + digits * 4;
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u32 val = s;
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for (int i = 0; i < digits; i++)
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{
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u8 digit = val % 10;
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render_digit(digit, painter_x, y);
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val /= 10;
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painter_x -= 4;
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}
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}
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void render()
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{
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ssd1306_setbuf(0);
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ssd1306_drawFastHLine(0, 31, 128, 1);
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render_number(score, 0, 0, SCORE_DIGITS);
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render_number(highscore, 0, 6, SCORE_DIGITS);
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// render_number(obstacle_count, 20, 0, 2);
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// render_number(abs(player_vel), 30, 0, 2);
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// render_number(time_to_obstacle, 20, 6, 3);
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for (u8 i = 0; i < obstacle_count; i++)
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{
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u8 type = obstacle_types[i];
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ssd1306_drawImage(obstacle_positions[i], 31 - 8, obstacle_sprites[type], 8, 8, 0);
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}
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if (time & RUN_ANIM_SPEED && is_running)
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ssd1306_drawImage(PLAYER_X, 31 - (player_y >> Y_PRECISION) - 8, soweli_a, 8, 8, 0);
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else
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ssd1306_drawImage(PLAYER_X, 31 - (player_y >> Y_PRECISION) - 8, soweli_b, 8, 8, 0);
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}
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/* White Noise Generator State */
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#define NOISE_BITS 8
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#define NOISE_MASK ((1 << NOISE_BITS) - 1)
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#define NOISE_POLY_TAP0 31
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#define NOISE_POLY_TAP1 21
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#define NOISE_POLY_TAP2 1
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#define NOISE_POLY_TAP3 0
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/*
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* random byte generator, taken from ch32v003fun examples
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*/
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uint8_t rand8(void)
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{
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uint8_t bit;
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uint32_t new_data;
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for (bit = 0; bit < NOISE_BITS; bit++)
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{
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new_data = ((lfsr >> NOISE_POLY_TAP0) ^
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(lfsr >> NOISE_POLY_TAP1) ^
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(lfsr >> NOISE_POLY_TAP2) ^
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(lfsr >> NOISE_POLY_TAP3));
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lfsr = (lfsr << 1) | (new_data & 1);
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}
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return lfsr & NOISE_MASK;
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}
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489
soweli/ssd1306.h
Normal file
489
soweli/ssd1306.h
Normal file
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@ -0,0 +1,489 @@
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/*
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* Single-File-Header for using SPI OLED
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* 05-05-2023 E. Brombaugh
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*/
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#ifndef _SSD1306_H
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#define _SSD1306_H
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#include <stdint.h>
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#include <string.h>
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// comfortable packet size for this OLED
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#define SSD1306_PSZ 32
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// characteristics of each type
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#if !defined(SSD1306_64X32) && !defined(SSD1306_128X32) && !defined(SSD1306_128X64)
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#error "Please define the SSD1306_WXH resolution used in your application"
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#endif
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#ifdef SSD1306_64X32
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#define SSD1306_W 64
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#define SSD1306_H 32
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#define SSD1306_FULLUSE
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#define SSD1306_OFFSET 32
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#endif
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#ifdef SSD1306_128X32
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#define SSD1306_W 128
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#define SSD1306_H 32
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#define SSD1306_OFFSET 0
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#endif
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#ifdef SSD1306_128X64
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#define SSD1306_W 128
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#define SSD1306_H 64
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#define SSD1306_FULLUSE
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#define SSD1306_OFFSET 0
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#endif
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/*
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* send OLED command byte
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*/
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uint8_t ssd1306_cmd(uint8_t cmd)
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{
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ssd1306_pkt_send(&cmd, 1, 1);
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return 0;
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}
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/*
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* send OLED data packet (up to 32 bytes)
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*/
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uint8_t ssd1306_data(uint8_t *data, uint8_t sz)
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{
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ssd1306_pkt_send(data, sz, 0);
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return 0;
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}
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#define SSD1306_SETCONTRAST 0x81
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#define SSD1306_SEGREMAP 0xA0
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#define SSD1306_DISPLAYALLON_RESUME 0xA4
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#define SSD1306_DISPLAYALLON 0xA5
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#define SSD1306_NORMALDISPLAY 0xA6
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#define SSD1306_INVERTDISPLAY 0xA7
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#define SSD1306_DISPLAYOFF 0xAE
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#define SSD1306_DISPLAYON 0xAF
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#define SSD1306_SETDISPLAYOFFSET 0xD3
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#define SSD1306_SETCOMPINS 0xDA
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#define SSD1306_SETVCOMDETECT 0xDB
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#define SSD1306_SETDISPLAYCLOCKDIV 0xD5
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#define SSD1306_SETPRECHARGE 0xD9
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#define SSD1306_SETMULTIPLEX 0xA8
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#define SSD1306_SETLOWCOLUMN 0x00
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#define SSD1306_SETHIGHCOLUMN 0x10
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#define SSD1306_SETSTARTLINE 0x40
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#define SSD1306_MEMORYMODE 0x20
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#define SSD1306_COLUMNADDR 0x21
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#define SSD1306_PAGEADDR 0x22
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#define SSD1306_COMSCANINC 0xC0
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#define SSD1306_COMSCANDEC 0xC8
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#define SSD1306_CHARGEPUMP 0x8D
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#define SSD1306_EXTERNALVCC 0x1
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#define SSD1306_SWITCHCAPVCC 0x2
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#define SSD1306_TERMINATE_CMDS 0xFF
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/* choose VCC mode */
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#define SSD1306_EXTERNALVCC 0x1
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#define SSD1306_SWITCHCAPVCC 0x2
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// #define vccstate SSD1306_EXTERNALVCC
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#define vccstate SSD1306_SWITCHCAPVCC
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// OLED initialization commands for 128x32
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const uint8_t ssd1306_init_array[] =
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{
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SSD1306_DISPLAYOFF, // 0xAE
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SSD1306_SETDISPLAYCLOCKDIV, // 0xD5
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0x80, // the suggested ratio 0x80
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SSD1306_SETMULTIPLEX, // 0xA8
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#ifdef SSD1306_64X32
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0x1F, // for 64-wide displays
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#else
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0x3F, // for 128-wide displays
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#endif
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SSD1306_SETDISPLAYOFFSET, // 0xD3
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0x00, // no offset
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SSD1306_SETSTARTLINE | 0x0, // 0x40 | line
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SSD1306_CHARGEPUMP, // 0x8D
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0x14, // enable?
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SSD1306_MEMORYMODE, // 0x20
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||||
0x00, // 0x0 act like ks0108
|
||||
SSD1306_SEGREMAP | 0x1, // 0xA0 | bit
|
||||
SSD1306_COMSCANDEC,
|
||||
SSD1306_SETCOMPINS, // 0xDA
|
||||
0x12, //
|
||||
SSD1306_SETCONTRAST, // 0x81
|
||||
0x8F,
|
||||
SSD1306_SETPRECHARGE, // 0xd9
|
||||
0xF1,
|
||||
SSD1306_SETVCOMDETECT, // 0xDB
|
||||
0x40,
|
||||
SSD1306_DISPLAYALLON_RESUME, // 0xA4
|
||||
SSD1306_NORMALDISPLAY, // 0xA6
|
||||
SSD1306_DISPLAYON, // 0xAF --turn on oled panel
|
||||
SSD1306_TERMINATE_CMDS // 0xFF --fake command to mark end
|
||||
};
|
||||
|
||||
// the display buffer
|
||||
uint8_t ssd1306_buffer[SSD1306_W * SSD1306_H / 8];
|
||||
|
||||
/*
|
||||
* set the buffer to a color
|
||||
*/
|
||||
void ssd1306_setbuf(uint8_t color)
|
||||
{
|
||||
memset(ssd1306_buffer, color ? 0xFF : 0x00, sizeof(ssd1306_buffer));
|
||||
}
|
||||
|
||||
#ifndef SSD1306_FULLUSE
|
||||
/*
|
||||
* expansion array for OLED with every other row unused
|
||||
*/
|
||||
const uint8_t expand[16] =
|
||||
{
|
||||
0x00,
|
||||
0x02,
|
||||
0x08,
|
||||
0x0a,
|
||||
0x20,
|
||||
0x22,
|
||||
0x28,
|
||||
0x2a,
|
||||
0x80,
|
||||
0x82,
|
||||
0x88,
|
||||
0x8a,
|
||||
0xa0,
|
||||
0xa2,
|
||||
0xa8,
|
||||
0xaa,
|
||||
};
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Send the frame buffer
|
||||
*/
|
||||
void ssd1306_refresh(void)
|
||||
{
|
||||
uint16_t i;
|
||||
|
||||
ssd1306_cmd(SSD1306_COLUMNADDR);
|
||||
ssd1306_cmd(SSD1306_OFFSET); // Column start address (0 = reset)
|
||||
ssd1306_cmd(SSD1306_OFFSET + SSD1306_W - 1); // Column end address (127 = reset)
|
||||
|
||||
ssd1306_cmd(SSD1306_PAGEADDR);
|
||||
ssd1306_cmd(0); // Page start address (0 = reset)
|
||||
ssd1306_cmd(7); // Page end address
|
||||
|
||||
#ifdef SSD1306_FULLUSE
|
||||
/* for fully used rows just plow thru everything */
|
||||
for (i = 0; i < sizeof(ssd1306_buffer); i += SSD1306_PSZ)
|
||||
{
|
||||
/* send PSZ block of data */
|
||||
ssd1306_data(&ssd1306_buffer[i], SSD1306_PSZ);
|
||||
}
|
||||
#else
|
||||
/* for displays with odd rows unused expand bytes */
|
||||
uint8_t tbuf[SSD1306_PSZ], j, k;
|
||||
for (i = 0; i < sizeof(ssd1306_buffer); i += 128) // for each page
|
||||
{
|
||||
/* low nybble */
|
||||
for (j = 0; j < 128; j += SSD1306_PSZ)
|
||||
{
|
||||
for (k = 0; k < SSD1306_PSZ; k++)
|
||||
tbuf[k] = expand[ssd1306_buffer[i + j + k] & 0xf];
|
||||
|
||||
/* send PSZ block of data */
|
||||
ssd1306_data(tbuf, SSD1306_PSZ);
|
||||
}
|
||||
|
||||
/* high nybble */
|
||||
for (j = 0; j < 128; j += SSD1306_PSZ)
|
||||
{
|
||||
for (k = 0; k < SSD1306_PSZ; k++)
|
||||
tbuf[k] = expand[(ssd1306_buffer[i + j + k] >> 4) & 0xf];
|
||||
|
||||
/* send PSZ block of data */
|
||||
ssd1306_data(tbuf, SSD1306_PSZ);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
* plot a pixel in the buffer
|
||||
*/
|
||||
void ssd1306_drawPixel(uint8_t x, uint8_t y, uint8_t color)
|
||||
{
|
||||
uint16_t addr;
|
||||
|
||||
/* clip */
|
||||
if (x >= SSD1306_W)
|
||||
return;
|
||||
if (y >= SSD1306_H)
|
||||
return;
|
||||
|
||||
/* compute buffer address */
|
||||
addr = x + SSD1306_W * (y / 8);
|
||||
|
||||
/* set/clear bit in buffer */
|
||||
if (color)
|
||||
ssd1306_buffer[addr] |= (1 << (y & 7));
|
||||
else
|
||||
ssd1306_buffer[addr] &= ~(1 << (y & 7));
|
||||
}
|
||||
|
||||
/*
|
||||
* fast vert line
|
||||
*/
|
||||
void ssd1306_drawFastVLine(uint8_t x, uint8_t y, uint8_t h, uint8_t color)
|
||||
{
|
||||
// clipping
|
||||
if ((x >= SSD1306_W) || (y >= SSD1306_H))
|
||||
return;
|
||||
if ((y + h - 1) >= SSD1306_H)
|
||||
h = SSD1306_H - y;
|
||||
while (h--)
|
||||
{
|
||||
ssd1306_drawPixel(x, y++, color);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* fast horiz line
|
||||
*/
|
||||
void ssd1306_drawFastHLine(uint8_t x, uint8_t y, uint8_t w, uint8_t color)
|
||||
{
|
||||
// clipping
|
||||
if ((x >= SSD1306_W) || (y >= SSD1306_H))
|
||||
return;
|
||||
if ((x + w - 1) >= SSD1306_W)
|
||||
w = SSD1306_W - x;
|
||||
|
||||
while (w--)
|
||||
{
|
||||
ssd1306_drawPixel(x++, y, color);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* abs() helper function for line drawing
|
||||
*/
|
||||
int16_t gfx_abs(int16_t x)
|
||||
{
|
||||
return (x < 0) ? -x : x;
|
||||
}
|
||||
|
||||
/*
|
||||
* swap() helper function for line drawing
|
||||
*/
|
||||
void gfx_swap(uint16_t *z0, uint16_t *z1)
|
||||
{
|
||||
uint16_t temp = *z0;
|
||||
*z0 = *z1;
|
||||
*z1 = temp;
|
||||
}
|
||||
|
||||
/*
|
||||
* Bresenham line draw routine swiped from Wikipedia
|
||||
*/
|
||||
void ssd1306_drawLine(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint8_t color)
|
||||
{
|
||||
int16_t steep;
|
||||
int16_t deltax, deltay, error, ystep, x, y;
|
||||
|
||||
/* flip sense 45deg to keep error calc in range */
|
||||
steep = (gfx_abs(y1 - y0) > gfx_abs(x1 - x0));
|
||||
|
||||
if (steep)
|
||||
{
|
||||
gfx_swap(&x0, &y0);
|
||||
gfx_swap(&x1, &y1);
|
||||
}
|
||||
|
||||
/* run low->high */
|
||||
if (x0 > x1)
|
||||
{
|
||||
gfx_swap(&x0, &x1);
|
||||
gfx_swap(&y0, &y1);
|
||||
}
|
||||
|
||||
/* set up loop initial conditions */
|
||||
deltax = x1 - x0;
|
||||
deltay = gfx_abs(y1 - y0);
|
||||
error = deltax / 2;
|
||||
y = y0;
|
||||
if (y0 < y1)
|
||||
ystep = 1;
|
||||
else
|
||||
ystep = -1;
|
||||
|
||||
/* loop x */
|
||||
for (x = x0; x <= x1; x++)
|
||||
{
|
||||
/* plot point */
|
||||
if (steep)
|
||||
/* flip point & plot */
|
||||
ssd1306_drawPixel(y, x, color);
|
||||
else
|
||||
/* just plot */
|
||||
ssd1306_drawPixel(x, y, color);
|
||||
|
||||
/* update error */
|
||||
error = error - deltay;
|
||||
|
||||
/* update y */
|
||||
if (error < 0)
|
||||
{
|
||||
y = y + ystep;
|
||||
error = error + deltax;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* draws a circle
|
||||
*/
|
||||
void ssd1306_drawCircle(int16_t x, int16_t y, int16_t radius, int8_t color)
|
||||
{
|
||||
/* Bresenham algorithm */
|
||||
int16_t x_pos = -radius;
|
||||
int16_t y_pos = 0;
|
||||
int16_t err = 2 - 2 * radius;
|
||||
int16_t e2;
|
||||
|
||||
do
|
||||
{
|
||||
ssd1306_drawPixel(x - x_pos, y + y_pos, color);
|
||||
ssd1306_drawPixel(x + x_pos, y + y_pos, color);
|
||||
ssd1306_drawPixel(x + x_pos, y - y_pos, color);
|
||||
ssd1306_drawPixel(x - x_pos, y - y_pos, color);
|
||||
e2 = err;
|
||||
if (e2 <= y_pos)
|
||||
{
|
||||
err += ++y_pos * 2 + 1;
|
||||
if (-x_pos == y_pos && e2 <= x_pos)
|
||||
{
|
||||
e2 = 0;
|
||||
}
|
||||
}
|
||||
if (e2 > x_pos)
|
||||
{
|
||||
err += ++x_pos * 2 + 1;
|
||||
}
|
||||
} while (x_pos <= 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* draws a filled circle
|
||||
*/
|
||||
void ssd1306_fillCircle(int16_t x, int16_t y, int16_t radius, int8_t color)
|
||||
{
|
||||
/* Bresenham algorithm */
|
||||
int16_t x_pos = -radius;
|
||||
int16_t y_pos = 0;
|
||||
int16_t err = 2 - 2 * radius;
|
||||
int16_t e2;
|
||||
|
||||
do
|
||||
{
|
||||
ssd1306_drawPixel(x - x_pos, y + y_pos, color);
|
||||
ssd1306_drawPixel(x + x_pos, y + y_pos, color);
|
||||
ssd1306_drawPixel(x + x_pos, y - y_pos, color);
|
||||
ssd1306_drawPixel(x - x_pos, y - y_pos, color);
|
||||
ssd1306_drawFastHLine(x + x_pos, y + y_pos, 2 * (-x_pos) + 1, color);
|
||||
ssd1306_drawFastHLine(x + x_pos, y - y_pos, 2 * (-x_pos) + 1, color);
|
||||
e2 = err;
|
||||
if (e2 <= y_pos)
|
||||
{
|
||||
err += ++y_pos * 2 + 1;
|
||||
if (-x_pos == y_pos && e2 <= x_pos)
|
||||
{
|
||||
e2 = 0;
|
||||
}
|
||||
}
|
||||
if (e2 > x_pos)
|
||||
{
|
||||
err += ++x_pos * 2 + 1;
|
||||
}
|
||||
} while (x_pos <= 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* draw a rectangle
|
||||
*/
|
||||
void ssd1306_drawRect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color)
|
||||
{
|
||||
ssd1306_drawFastVLine(x, y, h, color);
|
||||
ssd1306_drawFastVLine(x + w - 1, y, h, color);
|
||||
ssd1306_drawFastHLine(x, y, w, color);
|
||||
ssd1306_drawFastHLine(x, y + h - 1, w, color);
|
||||
}
|
||||
|
||||
/*
|
||||
* fill a rectangle
|
||||
*/
|
||||
void ssd1306_fillRect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color)
|
||||
{
|
||||
uint8_t m, n = y, iw = w;
|
||||
|
||||
/* scan vertical */
|
||||
while (h--)
|
||||
{
|
||||
m = x;
|
||||
w = iw;
|
||||
/* scan horizontal */
|
||||
while (w--)
|
||||
{
|
||||
/* invert pixels */
|
||||
ssd1306_drawPixel(m++, n, color);
|
||||
}
|
||||
n++;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* invert a rectangle in the buffer
|
||||
*/
|
||||
void ssd1306_xorrect(uint8_t x, uint8_t y, uint8_t w, uint8_t h)
|
||||
{
|
||||
uint8_t m, n = y, iw = w;
|
||||
|
||||
/* scan vertical */
|
||||
while (h--)
|
||||
{
|
||||
m = x;
|
||||
w = iw;
|
||||
/* scan horizontal */
|
||||
while (w--)
|
||||
{
|
||||
/* invert pixels */
|
||||
ssd1306_xorPixel(m++, n);
|
||||
}
|
||||
n++;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* initialize I2C and OLED
|
||||
*/
|
||||
uint8_t ssd1306_init(void)
|
||||
{
|
||||
// pulse reset
|
||||
ssd1306_rst();
|
||||
|
||||
// initialize OLED
|
||||
uint8_t *cmd_list = (uint8_t *)ssd1306_init_array;
|
||||
while (*cmd_list != SSD1306_TERMINATE_CMDS)
|
||||
{
|
||||
if (ssd1306_cmd(*cmd_list++))
|
||||
return 1;
|
||||
}
|
||||
|
||||
// clear display
|
||||
ssd1306_setbuf(0);
|
||||
ssd1306_refresh();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
363
soweli/ssd1306_i2c.h
Normal file
363
soweli/ssd1306_i2c.h
Normal file
|
|
@ -0,0 +1,363 @@
|
|||
/*
|
||||
* Single-File-Header for SSD1306 I2C interface
|
||||
* 05-07-2023 E. Brombaugh
|
||||
*/
|
||||
|
||||
#ifndef _SSD1306_I2C_H
|
||||
#define _SSD1306_I2C_H
|
||||
|
||||
#include <string.h>
|
||||
|
||||
// SSD1306 I2C address
|
||||
#define SSD1306_I2C_ADDR 0x3c
|
||||
|
||||
// I2C Bus clock rate - must be lower the Logic clock rate
|
||||
#define SSD1306_I2C_CLKRATE 1000000
|
||||
|
||||
// I2C Logic clock rate - must be higher than Bus clock rate
|
||||
#define SSD1306_I2C_PRERATE 2000000
|
||||
|
||||
// uncomment this for high-speed 36% duty cycle, otherwise 33%
|
||||
#define SSD1306_I2C_DUTY
|
||||
|
||||
// I2C Timeout count
|
||||
#define TIMEOUT_MAX 100000
|
||||
|
||||
// uncomment this to enable IRQ-driven operation
|
||||
//#define SSD1306_I2C_IRQ
|
||||
|
||||
#ifdef SSD1306_I2C_IRQ
|
||||
// some stuff that IRQ mode needs
|
||||
volatile uint8_t ssd1306_i2c_send_buffer[64], *ssd1306_i2c_send_ptr, ssd1306_i2c_send_sz, ssd1306_i2c_irq_state;
|
||||
|
||||
// uncomment this to enable time diags in IRQ
|
||||
//#define IRQ_DIAG
|
||||
#endif
|
||||
|
||||
/*
|
||||
* init just I2C
|
||||
*/
|
||||
void ssd1306_i2c_setup(void)
|
||||
{
|
||||
uint16_t tempreg;
|
||||
|
||||
// Reset I2C1 to init all regs
|
||||
RCC->APB1PRSTR |= RCC_APB1Periph_I2C1;
|
||||
RCC->APB1PRSTR &= ~RCC_APB1Periph_I2C1;
|
||||
|
||||
// set freq
|
||||
tempreg = I2C1->CTLR2;
|
||||
tempreg &= ~I2C_CTLR2_FREQ;
|
||||
tempreg |= (FUNCONF_SYSTEM_CORE_CLOCK/SSD1306_I2C_PRERATE)&I2C_CTLR2_FREQ;
|
||||
I2C1->CTLR2 = tempreg;
|
||||
|
||||
// Set clock config
|
||||
tempreg = 0;
|
||||
#if (SSD1306_I2C_CLKRATE <= 100000)
|
||||
// standard mode good to 100kHz
|
||||
tempreg = (FUNCONF_SYSTEM_CORE_CLOCK/(2*SSD1306_I2C_CLKRATE))&SSD1306_I2C_CKCFGR_CCR;
|
||||
#else
|
||||
// fast mode over 100kHz
|
||||
#ifndef SSD1306_I2C_DUTY
|
||||
// 33% duty cycle
|
||||
tempreg = (FUNCONF_SYSTEM_CORE_CLOCK/(3*SSD1306_I2C_CLKRATE))&SSD1306_I2C_CKCFGR_CCR;
|
||||
#else
|
||||
// 36% duty cycle
|
||||
tempreg = (FUNCONF_SYSTEM_CORE_CLOCK/(25*SSD1306_I2C_CLKRATE))&I2C_CKCFGR_CCR;
|
||||
tempreg |= I2C_CKCFGR_DUTY;
|
||||
#endif
|
||||
tempreg |= I2C_CKCFGR_FS;
|
||||
#endif
|
||||
I2C1->CKCFGR = tempreg;
|
||||
|
||||
#ifdef SSD1306_I2C_IRQ
|
||||
// enable IRQ driven operation
|
||||
NVIC_EnableIRQ(I2C1_EV_IRQn);
|
||||
|
||||
// initialize the state
|
||||
ssd1306_i2c_irq_state = 0;
|
||||
#endif
|
||||
|
||||
// Enable I2C
|
||||
I2C1->CTLR1 |= I2C_CTLR1_PE;
|
||||
|
||||
// set ACK mode
|
||||
I2C1->CTLR1 |= I2C_CTLR1_ACK;
|
||||
}
|
||||
|
||||
/*
|
||||
* error descriptions
|
||||
*/
|
||||
char *errstr[] =
|
||||
{
|
||||
"not busy",
|
||||
"master mode",
|
||||
"transmit mode",
|
||||
"tx empty",
|
||||
"transmit complete",
|
||||
};
|
||||
|
||||
/*
|
||||
* error handler
|
||||
*/
|
||||
uint8_t ssd1306_i2c_error(uint8_t err)
|
||||
{
|
||||
// report error
|
||||
printf("ssd1306_i2c_error - timeout waiting for %s\n\r", errstr[err]);
|
||||
|
||||
// reset & initialize I2C
|
||||
ssd1306_i2c_setup();
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
// event codes we use
|
||||
#define SSD1306_I2C_EVENT_MASTER_MODE_SELECT ((uint32_t)0x00030001) /* BUSY, MSL and SB flag */
|
||||
#define SSD1306_I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ((uint32_t)0x00070082) /* BUSY, MSL, ADDR, TXE and TRA flags */
|
||||
#define SSD1306_I2C_EVENT_MASTER_BYTE_TRANSMITTED ((uint32_t)0x00070084) /* TRA, BUSY, MSL, TXE and BTF flags */
|
||||
|
||||
/*
|
||||
* check for 32-bit event codes
|
||||
*/
|
||||
uint8_t ssd1306_i2c_chk_evt(uint32_t event_mask)
|
||||
{
|
||||
/* read order matters here! STAR1 before STAR2!! */
|
||||
uint32_t status = I2C1->STAR1 | (I2C1->STAR2<<16);
|
||||
return (status & event_mask) == event_mask;
|
||||
}
|
||||
|
||||
#ifdef SSD1306_I2C_IRQ
|
||||
/*
|
||||
* packet send for IRQ-driven operation
|
||||
*/
|
||||
uint8_t ssd1306_i2c_send(uint8_t addr, uint8_t *data, uint8_t sz)
|
||||
{
|
||||
int32_t timeout;
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(3));
|
||||
#endif
|
||||
|
||||
// error out if buffer under/overflow
|
||||
if((sz > sizeof(ssd1306_i2c_send_buffer)) || !sz)
|
||||
return 2;
|
||||
|
||||
// wait for previous packet to finish
|
||||
while(ssd1306_i2c_irq_state);
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(16+3));
|
||||
GPIOC->BSHR = (1<<(4));
|
||||
#endif
|
||||
|
||||
// init buffer for sending
|
||||
ssd1306_i2c_send_sz = sz;
|
||||
ssd1306_i2c_send_ptr = ssd1306_i2c_send_buffer;
|
||||
memcpy((uint8_t *)ssd1306_i2c_send_buffer, data, sz);
|
||||
|
||||
// wait for not busy
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((I2C1->STAR2 & I2C_STAR2_BUSY) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(0);
|
||||
|
||||
// Set START condition
|
||||
I2C1->CTLR1 |= I2C_CTLR1_START;
|
||||
|
||||
// wait for master mode select
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_MODE_SELECT)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(1);
|
||||
|
||||
// send 7-bit address + write flag
|
||||
I2C1->DATAR = addr<<1;
|
||||
|
||||
// wait for transmit condition
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(2);
|
||||
|
||||
// Enable TXE interrupt
|
||||
I2C1->CTLR2 |= I2C_CTLR2_ITBUFEN | I2C_CTLR2_ITEVTEN;
|
||||
ssd1306_i2c_irq_state = 1;
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(16+4));
|
||||
#endif
|
||||
|
||||
// exit
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* IRQ handler for I2C events
|
||||
*/
|
||||
void I2C1_EV_IRQHandler(void) __attribute__((interrupt));
|
||||
void I2C1_EV_IRQHandler(void)
|
||||
{
|
||||
uint16_t STAR1, STAR2 __attribute__((unused));
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(4));
|
||||
#endif
|
||||
|
||||
// read status, clear any events
|
||||
STAR1 = I2C1->STAR1;
|
||||
STAR2 = I2C1->STAR2;
|
||||
|
||||
/* check for TXE */
|
||||
if(STAR1 & I2C_STAR1_TXE)
|
||||
{
|
||||
/* check for remaining data */
|
||||
if(ssd1306_i2c_send_sz--)
|
||||
I2C1->DATAR = *ssd1306_i2c_send_ptr++;
|
||||
|
||||
/* was that the last byte? */
|
||||
if(!ssd1306_i2c_send_sz)
|
||||
{
|
||||
// disable TXE interrupt
|
||||
I2C1->CTLR2 &= ~(I2C_CTLR2_ITBUFEN | I2C_CTLR2_ITEVTEN);
|
||||
|
||||
// reset IRQ state
|
||||
ssd1306_i2c_irq_state = 0;
|
||||
|
||||
// wait for tx complete
|
||||
while(!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_BYTE_TRANSMITTED));
|
||||
|
||||
// set STOP condition
|
||||
I2C1->CTLR1 |= I2C_CTLR1_STOP;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(16+4));
|
||||
#endif
|
||||
}
|
||||
#else
|
||||
/*
|
||||
* low-level packet send for blocking polled operation via i2c
|
||||
*/
|
||||
uint8_t ssd1306_i2c_send(uint8_t addr, uint8_t *data, uint8_t sz)
|
||||
{
|
||||
int32_t timeout;
|
||||
|
||||
// wait for not busy
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((I2C1->STAR2 & I2C_STAR2_BUSY) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(0);
|
||||
|
||||
// Set START condition
|
||||
I2C1->CTLR1 |= I2C_CTLR1_START;
|
||||
|
||||
// wait for master mode select
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_MODE_SELECT)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(1);
|
||||
|
||||
// send 7-bit address + write flag
|
||||
I2C1->DATAR = addr<<1;
|
||||
|
||||
// wait for transmit condition
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(2);
|
||||
|
||||
// send data one byte at a time
|
||||
while(sz--)
|
||||
{
|
||||
// wait for TX Empty
|
||||
timeout = TIMEOUT_MAX;
|
||||
while(!(I2C1->STAR1 & I2C_STAR1_TXE) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(3);
|
||||
|
||||
// send command
|
||||
I2C1->DATAR = *data++;
|
||||
}
|
||||
|
||||
// wait for tx complete
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_BYTE_TRANSMITTED)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(4);
|
||||
|
||||
// set STOP condition
|
||||
I2C1->CTLR1 |= I2C_CTLR1_STOP;
|
||||
|
||||
// we're happy
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* high-level packet send for I2C
|
||||
*/
|
||||
uint8_t ssd1306_pkt_send(uint8_t *data, uint8_t sz, uint8_t cmd)
|
||||
{
|
||||
uint8_t pkt[33];
|
||||
|
||||
/* build command or data packets */
|
||||
if(cmd)
|
||||
{
|
||||
pkt[0] = 0;
|
||||
pkt[1] = *data;
|
||||
}
|
||||
else
|
||||
{
|
||||
pkt[0] = 0x40;
|
||||
memcpy(&pkt[1], data, sz);
|
||||
}
|
||||
return ssd1306_i2c_send(SSD1306_I2C_ADDR, pkt, sz+1);
|
||||
}
|
||||
|
||||
/*
|
||||
* init I2C and GPIO
|
||||
*/
|
||||
uint8_t ssd1306_i2c_init(void)
|
||||
{
|
||||
// Enable GPIOC and I2C
|
||||
RCC->APB2PCENR |= RCC_APB2Periph_GPIOC;
|
||||
RCC->APB1PCENR |= RCC_APB1Periph_I2C1;
|
||||
|
||||
// PC1 is SDA, 10MHz Output, alt func, open-drain
|
||||
GPIOC->CFGLR &= ~(0xf<<(4*1));
|
||||
GPIOC->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_OD_AF)<<(4*1);
|
||||
|
||||
// PC2 is SCL, 10MHz Output, alt func, open-drain
|
||||
GPIOC->CFGLR &= ~(0xf<<(4*2));
|
||||
GPIOC->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_OD_AF)<<(4*2);
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
// GPIO diags on PC3/PC4
|
||||
GPIOC->CFGLR &= ~(0xf<<(4*3));
|
||||
GPIOC->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_PP)<<(4*3);
|
||||
GPIOC->BSHR = (1<<(16+3));
|
||||
GPIOC->CFGLR &= ~(0xf<<(4*4));
|
||||
GPIOC->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_PP)<<(4*4);
|
||||
GPIOC->BSHR = (1<<(16+4));
|
||||
#endif
|
||||
|
||||
// load I2C regs
|
||||
ssd1306_i2c_setup();
|
||||
|
||||
#if 0
|
||||
// test if SSD1306 is on the bus by sending display off command
|
||||
uint8_t command = 0xAF;
|
||||
return ssd1306_pkt_send(&command, 1, 1);
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
* reset is not used for SSD1306 I2C interface
|
||||
*/
|
||||
void ssd1306_rst(void)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
Loading…
Reference in a new issue