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132 lines
4.5 KiB
C
132 lines
4.5 KiB
C
// Copyright (c) 2023 Cesanta Software Limited
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#include "hal.h"
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#include "mongoose.h"
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#define BTN_PIN PIN('B', 3) // On-board user button
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#define LED1_PIN PIN('A', 15) // On-board red LED
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#define LED2_PIN PIN('B', 4) // On-board blue LED
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#define LED_PIN LED2_PIN
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#define UART_DEBUG USART1
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#define BLINK_PERIOD_MS 1000 // LED_PIN blinking period in millis
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static volatile uint64_t s_ticks; // Milliseconds since boot
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__attribute__((interrupt())) void SysTick_Handler(void) {
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s_ticks++;
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SysTick->SR = 0;
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}
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uint64_t mg_millis(void) { // Let Mongoose use our uptime function
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return s_ticks; // Return number of milliseconds since boot
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}
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void mg_random(void *buf, size_t len) { // Use on-board RNG
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for (size_t n = 0; n < len; n += sizeof(uint32_t)) {
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uint32_t r = rng_read();
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memcpy((char *) buf + n, &r, n + sizeof(r) > len ? len - n : sizeof(r));
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}
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}
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static void timer_fn(void *arg) {
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gpio_toggle(LED_PIN); // Blink LED_PIN
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struct mg_tcpip_if *ifp = arg; // And show
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const char *names[] = {"down", "up", "req", "ready"}; // network stats
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MG_INFO(("Ethernet: %s, IP: %M, rx:%u, tx:%u, dr:%u, er:%u",
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names[ifp->state], mg_print_ip4, &ifp->ip, ifp->nrecv, ifp->nsent,
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ifp->ndrop, ifp->nerr));
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}
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void SysTick_Init(void) {
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SysTick->CMP = SystemCoreClock / 1000 - 1;
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SysTick->CNT = 0;
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SysTick->SR = 0;
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SysTick->CTLR = BIT(0) | BIT(1) | BIT(2) | BIT(3);
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NVIC_EnableIRQ(SysTicK_IRQn);
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}
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static void mg_putchar(char ch, void *param) {
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uart_write_byte(param, ch);
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}
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// https://mongoose.ws/documentation/#2-minute-integration-guide
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static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
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if (ev == MG_EV_HTTP_MSG) {
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// The MG_EV_HTTP_MSG event means HTTP request. `hm` holds parsed request,
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// see https://mongoose.ws/documentation/#struct-mg_http_message
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struct mg_http_message *hm = (struct mg_http_message *) ev_data;
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// If the requested URI is "/api/hi", send a simple JSON response back
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if (mg_http_match_uri(hm, "/api/hi")) {
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// Use mg_http_reply() API function to generate JSON response. It adds a
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// Content-Length header automatically. In the response, we show
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// the requested URI and HTTP body:
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mg_http_reply(c, 200, "", "{%m:%m,%m:%m}\n", // See mg_snprintf doc
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MG_ESC("uri"), mg_print_esc, hm->uri.len, hm->uri.ptr,
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MG_ESC("body"), mg_print_esc, hm->body.len, hm->body.ptr);
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} else {
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// For all other URIs, serve static content
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mg_http_reply(c, 200, "", "hi tick %llu\n", s_ticks); // See mg_snprintf doc
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}
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}
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(void) fn_data;
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}
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int main(void) {
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SystemCoreClockUpdate();
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SysTick_Init();
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gpio_output(LED_PIN); // Setup LED
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uart_init(UART_DEBUG, 115200); // Initialise debug printf
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struct mg_mgr mgr; // Initialise
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mg_mgr_init(&mgr); // Mongoose event manager
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mg_log_set(MG_LL_DEBUG); // Set log level
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mg_log_set_fn(mg_putchar, UART_DEBUG);
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ethernet_init(); // Initialise ethernet pins
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MG_INFO(("Starting, CPU freq %g MHz", (double) SystemCoreClock / 1000000));
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// Initialise Mongoose network stack
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struct mg_tcpip_driver_stm32_data driver_data = {.mdc_cr = 1};
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struct mg_tcpip_if mif = {.mac = GENERATE_LOCALLY_ADMINISTERED_MAC(),
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// Uncomment below for static configuration:
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// .ip = mg_htonl(MG_U32(192, 168, 0, 223)),
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// .mask = mg_htonl(MG_U32(255, 255, 255, 0)),
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// .gw = mg_htonl(MG_U32(192, 168, 0, 1)),
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.driver = &mg_tcpip_driver_stm32,
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.driver_data = &driver_data};
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mg_tcpip_init(&mgr, &mif);
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mg_timer_add(&mgr, BLINK_PERIOD_MS, MG_TIMER_REPEAT, timer_fn, &mif);
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MG_INFO(("MAC: %M. Waiting for IP...", mg_print_mac, mif.mac));
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while (mif.state != MG_TCPIP_STATE_READY) {
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mg_mgr_poll(&mgr, 0);
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}
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MG_INFO(("Initialising application..."));
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mg_http_listen(&mgr, "http://0.0.0.0", fn, NULL);
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MG_INFO(("Starting event loop"));
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for (;;) {
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mg_mgr_poll(&mgr, 0);
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}
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return 0;
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}
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// Newlib syscalls overrides. IO retargeting, and malloc
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int _write(int fd, char *ptr, int len) {
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if (fd == 1 || fd == 2) uart_write_buf(UART_DEBUG, ptr, (size_t) len);
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return len;
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}
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void *_sbrk(ptrdiff_t incr) {
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extern char _end[];
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extern char _heap_end[];
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static char *curbrk = _end;
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if ((curbrk + incr < _end) || (curbrk + incr > _heap_end)) return NULL - 1;
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curbrk += incr;
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return curbrk - incr;
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}
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