mongoose/examples/stm32/nucleo-f746zg-baremetal/main.c

88 lines
3.5 KiB
C

// Copyright (c) 2022 Cesanta Software Limited
// All rights reserved
#include "mcu.h"
#include "mongoose.h"
#define LED1 PIN('B', 0) // On-board LED pin (green)
#define LED2 PIN('B', 7) // On-board LED pin (blue)
#define LED3 PIN('B', 14) // On-board LED pin (red)
#define BTN1 PIN('C', 13) // On-board user button
static uint64_t s_ticks, s_exti; // Counters, increased by IRQ handlers
static void blink_cb(void *arg) { // Blink periodically
// MG_INFO(("ticks: %u", (unsigned) s_ticks));
gpio_toggle(LED2);
(void) arg;
}
uint64_t mg_millis(void) { // Declare our own uptime function
return s_ticks; // Return number of milliseconds since boot
}
void HardFault_Handler(void) { // Escalated fault handler
gpio_output(LED3); // Setup red LED
for (;;) spin(2999999), gpio_toggle(LED3); // Blink LED infinitely
}
void SysTick_Handler(void) { // SyStick IRQ handler, triggered every 1ms
s_ticks++;
}
void EXTI15_10_IRQHandler(void) { // External interrupt handler
s_exti++;
if (EXTI->PR & BIT(PINNO(BTN1))) EXTI->PR = BIT(PINNO(BTN1));
gpio_write(LED1, gpio_read(BTN1)); // No debounce. Turn LED if button pressed
}
int main(void) {
static struct uart *uart = UART3; // Use UART3 - its attached to debug
clock_init(); // Set clock to 216MHz
systick_init(SYS_FREQUENCY / 1000); // Increment s_ticks every ms
gpio_output(LED1); // Setup green LED
gpio_output(LED2); // Setup blue LED
gpio_input(BTN1); // Set button to input
irq_exti_attach(BTN1); // Attach BTN1 to exti
uart_init(uart, 115200); // It is wired to the debug port
// Initialise Ethernet. Enable MAC GPIO pins, see
// https://www.farnell.com/datasheets/2014265.pdf section 6.10
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,
GPIO_PULL_NONE, 11);
}
nvic_enable_irq(61); // Setup Ethernet IRQ handler
RCC->APB2ENR |= BIT(14); // Enable SYSCFG
SYSCFG->PMC |= BIT(23); // Use RMII. Goes first!
RCC->AHB1ENR |= BIT(25) | BIT(26) | BIT(27); // Enable Ethernet clocks
RCC->AHB1RSTR |= BIT(25); // ETHMAC force reset
RCC->AHB1RSTR &= ~BIT(25); // ETHMAC release reset
struct mg_mgr mgr; // Initialise Mongoose event manager
mg_mgr_init(&mgr); // and attach it to the MIP interface
mg_log_set(MG_LL_DEBUG); // Set log level
mg_timer_add(&mgr, 500, MG_TIMER_REPEAT, blink_cb, &mgr);
// 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 mip_driver_stm32_data driver_data = {.mdc_cr = 4}; // See driver_stm32.h
struct mip_if mif = {
.mac = {2, 0, 1, 2, 3, 5},
.driver = &mip_driver_stm32,
.driver_data = &driver_data,
};
mip_init(&mgr, &mif);
MG_INFO(("Init done, starting main loop"));
extern void device_dashboard_fn(struct mg_connection *, int, void *, void *);
mg_http_listen(&mgr, "http://0.0.0.0", device_dashboard_fn, NULL);
for (;;) mg_mgr_poll(&mgr, 0); // Infinite event loop
return 0;
}