diff --git a/CMakeLists.txt b/CMakeLists.txt index 5f4a53b..41a1f1b 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -15,7 +15,11 @@ add_executable(bunger ) # Add pico_stdlib library which aggregates commonly used features -target_link_libraries(bunger pico_stdlib) +target_link_libraries(bunger + pico_stdlib + hardware_spi +) + # create map/bin/hex/uf2 file in addition to ELF. -pico_add_extra_outputs(bunger) \ No newline at end of file +pico_add_extra_outputs(bunger) diff --git a/Makefile b/Makefile index 036e953..261b287 100755 --- a/Makefile +++ b/Makefile @@ -1,7 +1,8 @@ -build: +build_thing: cmake -B bin -DPICO_SDK_PATH=../pico-sdk make -j8 -C bin +# then manually copy bin/thing.uf2 to the pico clean: - rm -rf bin \ No newline at end of file + rm -rf bin diff --git a/src/display.h b/src/display.h new file mode 100644 index 0000000..915a319 --- /dev/null +++ b/src/display.h @@ -0,0 +1,228 @@ +#include +/* +Minimal helper library for the 320x240 TFT LCD, with ILI9341 controller chip +Required configuration, example: +#define DISPLAY_SPI spi0 + +#define PIN_TFT_BACKLIGHT 1 +#define PIN_TFT_SCK 2 +#define PIN_TFT_MOSI 3 +#define PIN_TFT_CS 5 // optional +#define PIN_TFT_DC 6 +#define PIN_TFT_RESET 7 + +*/ +#define u8 uint8_t +#define u16 uint16_t +#define u32 uint32_t + + +#define DC_C sio_hw->gpio_clr = (1ul << PIN_TFT_DC) +#define DC_D sio_hw->gpio_set = (1ul << PIN_TFT_DC) +#define WAIT_FOR_BUSY while (spi_get_hw(DISPLAY_SPI)->sr & SPI_SSPSR_BSY_BITS){}; +#define tft_Write_8N(B) while (!spi_is_writable(DISPLAY_SPI)){}; spi_get_hw(DISPLAY_SPI)->dr = (uint8_t)(B) + +#define COLOR_BLACK 0x0000 // 0, 0, 0 +#define COLOR_NAVY 0x000F // 0, 0, 123 +#define COLOR_DARKGREEN 0x03E0 // 0, 125, 0 +#define COLOR_DARKCYAN 0x03EF // 0, 125, 123 +#define COLOR_MAROON 0x7800 // 123, 0, 0 +#define COLOR_PURPLE 0x780F // 123, 0, 123 +#define COLOR_OLIVE 0x7BE0 // 123, 125, 0 +#define COLOR_LIGHTGREY 0xC618 // 198, 195, 198 +#define COLOR_DARKGREY 0x7BEF // 123, 125, 123 +#define COLOR_BLUE 0x001F // 0, 0, 255 +#define COLOR_GREEN 0x07E0 // 0, 255, 0 +#define COLOR_CYAN 0x07FF // 0, 255, 255 +#define COLOR_RED 0xF800 // 255, 0, 0 +#define COLOR_MAGENTA 0xF81F // 255, 0, 255 +#define COLOR_YELLOW 0xFFE0 // 255, 255, 0 +#define COLOR_WHITE 0xFFFF // 255, 255, 255 +#define COLOR_ORANGE 0xFD20 // 255, 165, 0 +#define COLOR_GREENYELLOW 0xAFE5 // 173, 255, 41 +#define COLOR_PINK 0xFC18 // 255, 130, 198 + +#define ILI9341_TFTWIDTH 240 // ILI9341 max TFT width +#define ILI9341_TFTHEIGHT 320 // ILI9341 max TFT height + +#define ILI9341_NOP 0x00 // No-op register +#define ILI9341_SWRESET 0x01 // Software reset register +#define ILI9341_RDDID 0x04 // Read display identification information +#define ILI9341_RDDST 0x09 // Read Display Status + +#define ILI9341_SLPIN 0x10 // Enter Sleep Mode +#define ILI9341_SLPOUT 0x11 // Sleep Out +#define ILI9341_PTLON 0x12 // Partial Mode ON +#define ILI9341_NORON 0x13 // Normal Display Mode ON + +#define ILI9341_RDMODE 0x0A // Read Display Power Mode +#define ILI9341_RDMADCTL 0x0B // Read Display MADCTL +#define ILI9341_RDPIXFMT 0x0C // Read Display Pixel Format +#define ILI9341_RDIMGFMT 0x0D // Read Display Image Format +#define ILI9341_RDSELFDIAG 0x0F // Read Display Self-Diagnostic Result + +#define ILI9341_INVOFF 0x20 // Display Inversion OFF +#define ILI9341_INVON 0x21 // Display Inversion ON +#define ILI9341_GAMMASET 0x26 // Gamma Set +#define ILI9341_DISPOFF 0x28 // Display OFF +#define ILI9341_DISPON 0x29 // Display ON + +#define ILI9341_CASET 0x2A // Column Address Set +#define ILI9341_PASET 0x2B // Page Address Set +#define ILI9341_RAMWR 0x2C // Memory Write +#define ILI9341_RAMRD 0x2E // Memory Read + +#define ILI9341_PTLAR 0x30 // Partial Area +#define ILI9341_VSCRDEF 0x33 // Vertical Scrolling Definition +#define ILI9341_MADCTL 0x36 // Memory Access Control +#define ILI9341_VSCRSADD 0x37 // Vertical Scrolling Start Address +#define ILI9341_PIXFMT 0x3A // COLMOD: Pixel Format Set + +#define ILI9341_FRMCTR1 0xB1 // Frame Rate Control (In Normal Mode/Full Colors) +#define ILI9341_FRMCTR2 0xB2 // Frame Rate Control (In Idle Mode/8 colors) +#define ILI9341_FRMCTR3 0xB3 // Frame Rate control (In Partial Mode/Full Colors) +#define ILI9341_INVCTR 0xB4 // Display Inversion Control +#define ILI9341_DFUNCTR 0xB6 // Display Function Control + +#define ILI9341_PWCTR1 0xC0 // Power Control 1 +#define ILI9341_PWCTR2 0xC1 // Power Control 2 +#define ILI9341_PWCTR3 0xC2 // Power Control 3 +#define ILI9341_PWCTR4 0xC3 // Power Control 4 +#define ILI9341_PWCTR5 0xC4 // Power Control 5 +#define ILI9341_VMCTR1 0xC5 // VCOM Control 1 +#define ILI9341_VMCTR2 0xC7 // VCOM Control 2 + +#define ILI9341_RDID1 0xDA // Read ID 1 +#define ILI9341_RDID2 0xDB // Read ID 2 +#define ILI9341_RDID3 0xDC // Read ID 3 +#define ILI9341_RDID4 0xDD // Read ID 4 + +#define ILI9341_GMCTRP1 0xE0 // Positive Gamma Correction +#define ILI9341_GMCTRN1 0xE1 // Negative Gamma Correction + +static const uint8_t initcmd[] = { + 0xEF, 3, 0x03, 0x80, 0x02, // undocumented mystery command + 0xCF, 3, 0x00, 0xC1, 0x30, // power control B + 0xED, 4, 0x64, 0x03, 0x12, 0x81, // power on sequence control + 0xE8, 3, 0x85, 0x00, 0x78, // driver timing control A + 0xCB, 5, 0x39, 0x2C, 0x00, 0x34, 0x02, // power control A + 0xF7, 1, 0x20, // pump ratio control + 0xEA, 2, 0x00, 0x00, // driver timing control B + ILI9341_PWCTR1 , 1, 0x23, // Power control VRH[5:0] + ILI9341_PWCTR2 , 1, 0x10, // Power control SAP[2:0];BT[3:0] + ILI9341_VMCTR1 , 2, 0x3e, 0x28, // VCOM control 1 + ILI9341_VMCTR2 , 1, 0x86, // VCOM control 2 + ILI9341_MADCTL , 1, 0x48, // Memory Access Control, sets access order + // ILI9341_VSCRSADD, 1, 0x00, // Vertical scroll zero + ILI9341_PIXFMT , 1, 0x55, // pixel format, 16bpp (RGB565) + // 0xF6, 3, 0x01, 0x00, 0x02, // enable RGB mode + ILI9341_FRMCTR1 , 2, 0x00, 0x13, // frame rate control, division ratio 2^0, 79hz(why??) + ILI9341_DFUNCTR , 3, 0x08, 0x82, 0x27, // Display Function Control, + 0xF2, 1, 0x00, // 3Gamma Function Disable + ILI9341_GAMMASET , 1, 0x01, // Gamma curve selected + ILI9341_GMCTRP1 , 15, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, // Set Gamma + 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00, + ILI9341_GMCTRN1 , 15, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, // Set Gamma + 0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F, + ILI9341_SLPOUT , 0x80, // Exit Sleep + ILI9341_DISPON , 0, // Display on + 0x00 // End of list +}; + +void tft_send_command(u8 cmd, const u8 *args, size_t arg_count) { + #ifdef PIN_TFT_CS + gpio_put(PIN_TFT_CS, 0); + #endif + DC_C; + spi_write_blocking(DISPLAY_SPI, &cmd, 1); + if (arg_count) { + DC_D; + spi_write_blocking(DISPLAY_SPI, args, arg_count); + } + #ifdef PIN_TFT_CS + gpio_put(PIN_TFT_CS, 1); + #endif +} + +void tft_init_pins() { + gpio_init(PIN_TFT_BACKLIGHT); + gpio_set_dir(PIN_TFT_BACKLIGHT, GPIO_OUT); + + gpio_set_dir(PIN_TFT_SCK, GPIO_OUT); + gpio_set_function(PIN_TFT_SCK, GPIO_FUNC_SPI); + + gpio_set_dir(PIN_TFT_MOSI, GPIO_OUT); + gpio_set_function(PIN_TFT_MOSI, GPIO_FUNC_SPI); + + gpio_set_function(PIN_TFT_DC, GPIO_FUNC_SIO); + gpio_set_dir(PIN_TFT_DC, GPIO_OUT); + gpio_put(PIN_TFT_DC, 1); + + #ifdef PIN_TFT_CS + gpio_init(PIN_TFT_CS); + gpio_set_dir(PIN_TFT_CS, GPIO_OUT); + #endif + + gpio_set_function(PIN_TFT_RESET, GPIO_FUNC_SIO); + gpio_set_dir(PIN_TFT_RESET, GPIO_OUT); + gpio_put(PIN_TFT_RESET, 1); +} + +void tft_init_display(uint baudrate) { + tft_init_pins(); + spi_init(DISPLAY_SPI, baudrate); + + // reset display + gpio_put(PIN_TFT_RESET, 1); + sleep_ms(5); + gpio_put(PIN_TFT_RESET, 0); + sleep_ms(20); + gpio_put(PIN_TFT_RESET, 1); + sleep_ms(150); + + // init display + const u8 *addr = initcmd; + while (1) { + u8 cmd = *(addr++); + if (cmd == 0) break; + u8 x = *(addr++); + u8 arg_count = x & 0x7f; + tft_send_command(cmd, addr, arg_count); + addr += arg_count; + if (x & 0x80) + sleep_ms(120); + } + sleep_ms(150); + gpio_put(PIN_TFT_BACKLIGHT, 1); +} + +void tft_set_pixel(int x, int y, u32 color) { + tft_send_command(ILI9341_CASET, (u8[]){x >> 8, x, x >> 8, x}, 4); + tft_send_command(ILI9341_PASET, (u8[]){y >> 8, y, y >> 8, y}, 4); + DC_C; + spi_get_hw(DISPLAY_SPI)->dr = ILI9341_RAMWR; + WAIT_FOR_BUSY; + DC_D; + tft_Write_8N((u8)(color >> 8)); + tft_Write_8N((u8)(color & 0xff)); + WAIT_FOR_BUSY; +} + +void tft_fill(u16 color) { + tft_send_command(ILI9341_CASET, (u8[]){0, 0, ILI9341_TFTWIDTH >> 8, (u8)ILI9341_TFTWIDTH}, 4); + tft_send_command(ILI9341_PASET, (u8[]){0, 0, ILI9341_TFTHEIGHT >> 8, (u8)ILI9341_TFTHEIGHT}, 4); + DC_C; + spi_get_hw(DISPLAY_SPI)->dr = ILI9341_RAMWR; + WAIT_FOR_BUSY; + DC_D; + + u8 upper = color >> 8; + u8 lower = color; + u32 pixel_count = ILI9341_TFTWIDTH * ILI9341_TFTHEIGHT; + + while (pixel_count--) { + tft_Write_8N(upper); + tft_Write_8N(lower); + } + WAIT_FOR_BUSY; +} diff --git a/src/main.c b/src/main.c index 6654463..390fdfb 100644 --- a/src/main.c +++ b/src/main.c @@ -1,15 +1,48 @@ #include "pico/stdlib.h" +#include "hardware/spi.h" -#define LED_PIN 25 +#define DISPLAY_SPI spi0 +#define PIN_TFT_BACKLIGHT 1 +#define PIN_TFT_SCK 2 +#define PIN_TFT_MOSI 3 +// #define PIN_TFT_CS 5 +#define PIN_TFT_DC 6 +#define PIN_TFT_RESET 7 +#include "display.h" + +#define HEIGHT ILI9341_TFTHEIGHT +#define WIDTH ILI9341_TFTWIDTH int main() { - gpio_init(LED_PIN); - gpio_set_dir(LED_PIN, GPIO_OUT); + tft_init_display(100 * 1000 * 1000); // max is 62.5MHz - while (true) { - gpio_put(LED_PIN, true); - sleep_ms(500); - gpio_put(LED_PIN, false); - sleep_ms(500); - } + int x = 0; + int y = 0; + + u16 col = 0b1111100000000000; + + // tft_send_command(ILI9341_CASET, (u8[]){0, 16, 0, 48}, 4); + // tft_send_command(ILI9341_PASET, (u8[]){0, 16, 0, 48}, 4); + // u8 thing[32*32]; + // tft_send_command(ILI9341_RAMWR, thing, 32*32*2); + + while (1) { + x = (x + 1) % WIDTH; + if (x == 0) { + y = (y + 1) % HEIGHT; + if (y == 0) { + // col = ~col; + } + } + col = ~col; + tft_fill(col); + sleep_ms(300); + // tft_set_pixel(x, y, col); + // sleep_us(10); + + // gpio_put(PICO_DEFAULT_LED_PIN, x%2); + // sleep_ms(500); + // gpio_put(PICO_DEFAULT_LED_PIN, 0); + // sleep_ms(500); + } } \ No newline at end of file