// Copyright (c) 2023 Cesanta Software Limited
// All rights reserved
#include "hal.h"
#include "mongoose.h"
#define BLINK_PERIOD_MS 1000 // LED blinking period in millis
static struct spi spi_pins = {
.miso = PIN('B', 4),
.mosi = PIN('A', 0),
.clk = PIN('A', 1),
.cs = PIN('A', 4),
};
uint32_t SystemCoreClock = CPU_FREQUENCY;
void SystemInit(void) { // Called automatically by startup code
rng_init();
SysTick_Config(CPU_FREQUENCY / 1000); // Sys tick every 1ms
}
static volatile uint64_t s_ticks; // Milliseconds since boot
void SysTick_Handler(void) { // SyStick IRQ handler, triggered every 1ms
s_ticks++;
}
void mg_random(void *buf, size_t len) { // Use on-board RNG
for (size_t n = 0; n < len; n += sizeof(uint32_t)) {
uint32_t r = rng_read();
memcpy((char *) buf + n, &r, n + sizeof(r) > len ? len - n : sizeof(r));
}
}
uint64_t mg_millis(void) { // Let Mongoose use our uptime function
return s_ticks; // Return number of milliseconds since boot
}
static void timer_fn(void *arg) {
gpio_toggle(LED); // Blink LED
struct mg_tcpip_if *ifp = arg; // And show
MG_INFO(("Ethernet: %d, IP: %M, rx:%u, tx:%u, dr:%u, er:%u", ifp->state,
mg_print_ip4, &ifp->ip, ifp->nrecv, ifp->nsent, ifp->ndrop,
ifp->nerr));
}
static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
struct mg_tcpip_if *ifp = (struct mg_tcpip_if *) fn_data;
if (ev == MG_EV_HTTP_MSG) {
struct mg_http_message *hm = (struct mg_http_message *) ev_data;
if (mg_http_match_uri(hm, "/api/hello")) { // Request to /api/hello
mg_http_reply(c, 200, "", "{%m:%u,%m:%u,%m:%u,%m:%u,%m:%u}\n",
MG_ESC("eth"), ifp->state, MG_ESC("frames_received"),
ifp->nrecv, MG_ESC("frames_sent"), ifp->nsent,
MG_ESC("frames_dropped"), ifp->ndrop,
MG_ESC("interface_errors"), ifp->nerr);
} else if (mg_http_match_uri(hm, "/")) { // Index page
mg_http_reply(
c, 200, "", "%s",
""
"Welcome to Mongoose
"
"See /api/hello for REST example"
"");
} else { // All other URIs
mg_http_reply(c, 404, "", "Not Found\n");
}
}
}
int main(void) {
gpio_output(LED); // Setup green LED
uart_init(UART_DEBUG, 115200); // Initialise debug printf
// ethernet_init(); // Initialise ethernet pins
MG_INFO(("Starting, CPU freq %g MHz", (double) SystemCoreClock / 1000000));
struct mg_mgr mgr; // Initialise
mg_mgr_init(&mgr); // Mongoose event manager
mg_log_set(MG_LL_DEBUG); // Set log level
// Initialise Mongoose network stack
spi_init(&spi_pins);
struct mg_tcpip_spi spi = {
.begin = (void (*)(void *)) spi_begin,
.end = (void (*)(void *)) spi_end,
.txn = (uint8_t(*)(void *, uint8_t)) spi_txn,
.spi = &spi_pins,
};
struct mg_tcpip_if mif = {.mac = GENERATE_LOCALLY_ADMINISTERED_MAC(),
// Uncomment below for static configuration:
// .ip = mg_htonl(MG_U32(192, 168, 0, 223)),
// .mask = mg_htonl(MG_U32(255, 255, 255, 0)),
// .gw = mg_htonl(MG_U32(192, 168, 0, 1)),
.driver = &mg_tcpip_driver_w5500,
.driver_data = &spi};
mg_tcpip_init(&mgr, &mif);
MG_INFO(("MAC: %M. Waiting for IP...", mg_print_mac, mif.mac));
while (mif.state != MG_TCPIP_STATE_READY) {
mg_mgr_poll(&mgr, 0);
}
MG_INFO(("Initialising application..."));
mg_timer_add(&mgr, BLINK_PERIOD_MS, MG_TIMER_REPEAT, timer_fn, &mif);
mg_http_listen(&mgr, "http://0.0.0.0:80", fn, &mif);
MG_INFO(("Starting event loop"));
for (;;) {
mg_mgr_poll(&mgr, 0);
}
return 0;
}