mongoose/examples/stm32/nucleo-h743zi-baremetal/main.c

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// Copyright (c) 2023 Cesanta Software Limited
// All rights reserved
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#include "hal.h"
#include "mongoose.h"
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#define LED1 PIN('B', 0) // On-board LED pin (green)
#define LED2 PIN('E', 1) // On-board LED pin (yellow)
#define LED3 PIN('B', 14) // On-board LED pin (red)
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#define LED LED2 // Use blue LED for blinking
#define BLINK_PERIOD_MS 1000 // LED blinking period in millis
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static volatile uint64_t s_ticks; // Milliseconds since boot
void SysTick_Handler(void) { // SyStick IRQ handler, triggered every 1ms
s_ticks++;
}
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uint64_t mg_millis(void) { // Let Mongoose use our uptime function
return s_ticks; // Return number of milliseconds since boot
}
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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));
}
}
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static void timer_fn(void *arg) {
gpio_toggle(LED); // Blink LED
struct mg_tcpip_if *ifp = arg; // And show
const char *names[] = {"down", "up", "ready"}; // network stats
MG_INFO(("Ethernet: %s, IP: %M, rx:%u, tx:%u, dr:%u, er:%u",
names[ifp->state], mg_print_ip4, &ifp->ip, ifp->nrecv, ifp->nsent,
ifp->ndrop, ifp->nerr));
}
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static void ethernet_init(void) {
// Initialise Ethernet. Enable MAC GPIO pins, see
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// https://www.st.com/resource/en/user_manual/um2407-stm32h7-nucleo144-boards-mb1364-stmicroelectronics.pdf
uint16_t pins[] = {PIN('A', 1), PIN('A', 2), PIN('A', 7),
PIN('B', 13), PIN('C', 1), PIN('C', 4),
PIN('C', 5), PIN('G', 11), PIN('G', 13)};
for (size_t i = 0; i < sizeof(pins) / sizeof(pins[0]); i++) {
gpio_init(pins[i], GPIO_MODE_AF, GPIO_OTYPE_PUSH_PULL, GPIO_SPEED_INSANE,
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GPIO_PULL_NONE, 11); // 11 is the Ethernet function
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}
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NVIC_EnableIRQ(ETH_IRQn); // Setup Ethernet IRQ handler
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SETBITS(SYSCFG->PMCR, 7 << 21, 4 << 21); // Use RMII (12.3.1)
RCC->AHB1ENR |= BIT(15) | BIT(16) | BIT(17); // Enable Ethernet clocks
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}
int main(void) {
gpio_output(LED); // Setup green LED
uart_init(UART_DEBUG, 115200); // Initialise debug printf
ethernet_init(); // Initialise ethernet pins
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MG_INFO(("Chip revision: %c, max cpu clock: %u MHz", chiprev(),
(chiprev() == 'V') ? 480 : 400));
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
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// Initialise Mongoose network stack
// Specify MAC address, and IP/mask/GW in network byte order for static
// IP configuration. If IP/mask/GW are unset, DHCP is going to be used
struct mg_tcpip_driver_stm32h_data driver_data = {.mdc_cr = 4};
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struct mg_tcpip_if mif = {.mac = GENERATE_LOCALLY_ADMINISTERED_MAC(),
.driver = &mg_tcpip_driver_stm32h,
.driver_data = &driver_data};
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) {
mg_mgr_poll(&mgr, 0);
}
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MG_INFO(("Initialising application..."));
extern void device_dashboard_fn(struct mg_connection *, int, void *, void *);
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mg_http_listen(&mgr, "http://0.0.0.0", device_dashboard_fn, NULL);
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MG_INFO(("Starting event loop"));
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for (;;) {
mg_mgr_poll(&mgr, 0);
}
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return 0;
}