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pico: init, read encoder and send data to server

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Crispy 2025-07-03 18:29:53 +02:00
parent c545abd5ab
commit cdccb0843c
6 changed files with 399 additions and 0 deletions
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92
pico/src/lwipopts.h Normal file
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#ifndef _LWIPOPTS_EXAMPLE_COMMONH_H
#define _LWIPOPTS_EXAMPLE_COMMONH_H
// Common settings used in most of the pico_w examples
// (see https://www.nongnu.org/lwip/2_1_x/group__lwip__opts.html for details)
// allow override in some examples
#ifndef NO_SYS
#define NO_SYS 1
#endif
// allow override in some examples
#ifndef LWIP_SOCKET
#define LWIP_SOCKET 0
#endif
#if PICO_CYW43_ARCH_POLL
#define MEM_LIBC_MALLOC 1
#else
// MEM_LIBC_MALLOC is incompatible with non polling versions
#define MEM_LIBC_MALLOC 0
#endif
#define MEM_ALIGNMENT 4
#ifndef MEM_SIZE
#define MEM_SIZE 4000
#endif
#define MEMP_NUM_TCP_SEG 32
#define MEMP_NUM_ARP_QUEUE 10
#define PBUF_POOL_SIZE 24
#define LWIP_ARP 1
#define LWIP_ETHERNET 1
#define LWIP_ICMP 1
#define LWIP_RAW 1
#define TCP_WND (8 * TCP_MSS)
#define TCP_MSS 1460
#define TCP_SND_BUF (8 * TCP_MSS)
#define TCP_SND_QUEUELEN ((4 * (TCP_SND_BUF) + (TCP_MSS - 1)) / (TCP_MSS))
#define LWIP_NETIF_STATUS_CALLBACK 1
#define LWIP_NETIF_LINK_CALLBACK 1
#define LWIP_NETIF_HOSTNAME 1
#define LWIP_NETCONN 0
#define MEM_STATS 0
#define SYS_STATS 0
#define MEMP_STATS 0
#define LINK_STATS 0
// #define ETH_PAD_SIZE 2
#define LWIP_CHKSUM_ALGORITHM 3
#define LWIP_DHCP 1
#define LWIP_IPV4 1
#define LWIP_TCP 1
#define LWIP_UDP 1
#define LWIP_DNS 1
#define LWIP_TCP_KEEPALIVE 1
#define LWIP_NETIF_TX_SINGLE_PBUF 1
#define DHCP_DOES_ARP_CHECK 0
#define LWIP_DHCP_DOES_ACD_CHECK 0
#ifndef NDEBUG
#define LWIP_DEBUG 1
#define LWIP_STATS 1
#define LWIP_STATS_DISPLAY 1
#endif
#define ETHARP_DEBUG LWIP_DBG_OFF
#define NETIF_DEBUG LWIP_DBG_OFF
#define PBUF_DEBUG LWIP_DBG_OFF
#define API_LIB_DEBUG LWIP_DBG_OFF
#define API_MSG_DEBUG LWIP_DBG_OFF
#define SOCKETS_DEBUG LWIP_DBG_OFF
#define ICMP_DEBUG LWIP_DBG_OFF
#define INET_DEBUG LWIP_DBG_OFF
#define IP_DEBUG LWIP_DBG_OFF
#define IP_REASS_DEBUG LWIP_DBG_OFF
#define RAW_DEBUG LWIP_DBG_OFF
#define MEM_DEBUG LWIP_DBG_OFF
#define MEMP_DEBUG LWIP_DBG_OFF
#define SYS_DEBUG LWIP_DBG_OFF
#define TCP_DEBUG LWIP_DBG_OFF
#define TCP_INPUT_DEBUG LWIP_DBG_OFF
#define TCP_OUTPUT_DEBUG LWIP_DBG_OFF
#define TCP_RTO_DEBUG LWIP_DBG_OFF
#define TCP_CWND_DEBUG LWIP_DBG_OFF
#define TCP_WND_DEBUG LWIP_DBG_OFF
#define TCP_FR_DEBUG LWIP_DBG_OFF
#define TCP_QLEN_DEBUG LWIP_DBG_OFF
#define TCP_RST_DEBUG LWIP_DBG_OFF
#define UDP_DEBUG LWIP_DBG_OFF
#define TCPIP_DEBUG LWIP_DBG_OFF
#define PPP_DEBUG LWIP_DBG_OFF
#define SLIP_DEBUG LWIP_DBG_OFF
#define DHCP_DEBUG LWIP_DBG_OFF
#endif /* __LWIPOPTS_H__ */

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pico/src/main.c Normal file
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#include <stdint.h>
#include "pico/stdlib.h"
#include "pico/cyw43_arch.h"
#include "pico/cyw43_driver.h"
#include "hardware/adc.h"
#include "lwip/tcp.h"
#include "lwip/apps/http_client.h"
#define u32 uint32_t
#define u16 uint16_t
#define u8 uint8_t
char ssid[] = "TODO";
char pass[] = "secret";
const ip_addr_t SERVER_IP = IPADDR4_INIT_BYTES(192, 168, 0, 108);
#define SERVER_PORT 25564
#define SET_LED(state) cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, state)
struct tcp_pcb *tcp_controller;
#define ENCODER_BITS 3
u8 rotary_encoder_directon;
u8 rotary_encoder_bits;
u8 rotary_encoder_bit[ENCODER_BITS];
u16 rotary_encoder_raw[ENCODER_BITS];
u16 rotary_encoder_min[ENCODER_BITS];
u16 rotary_encoder_max[ENCODER_BITS];
u16 rotary_encoder_high[ENCODER_BITS];
u16 rotary_encoder_low[ENCODER_BITS];
// static const u32 encoder_adc_pins[ENCODER_BITS] = {26, 27, 28};
void update_raw_values() {
for (int b = 0; b < ENCODER_BITS; b++) {
adc_select_input(b);
rotary_encoder_raw[b] = adc_read();
}
}
void calibrate_brightness() {
for (int b = 0; b < ENCODER_BITS; b++) {
rotary_encoder_min[b] = 0xffff;
rotary_encoder_max[b] = 0;
}
for (int i = 0; i < 300; i++) {
SET_LED(i & 2);
update_raw_values();
for (int b = 0; b < ENCODER_BITS; b++) {
if (rotary_encoder_raw[b] > rotary_encoder_max[b])
rotary_encoder_max[b] = rotary_encoder_raw[b];
else if (rotary_encoder_raw[b] < rotary_encoder_min[b])
rotary_encoder_min[b] = rotary_encoder_raw[b];
}
sleep_ms(25);
}
for (int b = 0; b < ENCODER_BITS; b++) {
u16 diff = rotary_encoder_max[b] - rotary_encoder_min[b];
rotary_encoder_low[b] = rotary_encoder_min[b] + diff / 3;
rotary_encoder_high[b] = rotary_encoder_max[b] - diff / 3;
}
SET_LED(1);
sleep_ms(500);
SET_LED(0);
}
void update_encoder_value() {
update_raw_values();
for (int b = 0; b < ENCODER_BITS; b++) {
if (rotary_encoder_raw[b] > rotary_encoder_high[b])
rotary_encoder_bit[b] = 1;
else if (rotary_encoder_raw[b] < rotary_encoder_low[b])
rotary_encoder_bit[b] = 0;
}
rotary_encoder_bits = 0;
for (int b = 0; b < ENCODER_BITS; b++) {
rotary_encoder_bits <<= 1;
rotary_encoder_bits |= !rotary_encoder_bit[b]; // inverse to make white = 0
}
// const u8 reverse_gray_code[1 << ENCODER_BITS] = {0, 1, 3, 2, 7, 6, 4, 5};
// gray code: 0 1 5 7 3 2 6 4
// index: 0 1 2 3 4 5 6 7
// reverse : 0 1 5 4 7 2 6 3
const u8 reverse_gray_code[1 << ENCODER_BITS] = {0, 1, 5, 4, 7, 2, 6, 3};
rotary_encoder_directon = reverse_gray_code[rotary_encoder_bits];
}
static err_t connected_fn(void *arg, struct tcp_pcb *tpcb, err_t err) {
return ERR_OK;
}
void ensure_server_connection() {
while (tcp_controller->state != ESTABLISHED) {
int err = tcp_connect(tcp_controller, &SERVER_IP, SERVER_PORT, connected_fn);
while (err++) {
SET_LED(1);
sleep_ms(150);
SET_LED(0);
sleep_ms(300);
}
}
}
void send_data() {
ensure_server_connection();
u8 buf[] = "direction: X=X\n";
buf[11] = rotary_encoder_bits + '0';
buf[13] = rotary_encoder_directon + '0';
int err = tcp_write(tcp_controller, buf, 15, 0);
}
int main() {
adc_init();
adc_gpio_init(26);
adc_gpio_init(27);
adc_gpio_init(28);
if (cyw43_arch_init()) {
SET_LED(1);
sleep_ms(2000);
return -1;
}
cyw43_arch_enable_sta_mode();
int err = cyw43_arch_wifi_connect_timeout_ms(ssid, pass, CYW43_AUTH_WPA2_AES_PSK, 10000);
if (err) {
PICO_ERROR_BADAUTH; // jump to definition :)
while (err++) {
SET_LED(1);
sleep_ms(100);
SET_LED(0);
sleep_ms(100);
}
return -1;
}
tcp_controller = tcp_new_ip_type(IPADDR_TYPE_V4);
ensure_server_connection();
tcp_write(tcp_controller, "be gay do crime :3\n", 19, 0);
SET_LED(1);
sleep_ms(200);
update_raw_values();
SET_LED(0);
// tcp_controller->state
calibrate_brightness();
while (true) {
update_encoder_value();
send_data();
sleep_ms(500);
}
}