mongoose/examples/ti/ek-tm4c1294xl-baremetal/main.c
2023-03-06 17:33:17 -03:00

102 lines
3.7 KiB
C

// Copyright (c) 2022-2023 Cesanta Software Limited
// All rights reserved
#include "hal.h"
#include "mongoose.h"
#define LED1 PIN('N', 1) // On-board LED pin
#define LED2 PIN('N', 0) // On-board LED pin
#define LED3 PIN('F', 4) // On-board LED pin
#define LED4 PIN('F', 0) // On-board LED pin
#define LED LED1 // Use this LED for blinking
#define BLINK_PERIOD_MS 1000 // LED blinking period in millis
static volatile uint64_t s_ticks; // Milliseconds since boot
void SysTick_Handler(void) { // SyStick IRQ handler, triggered every 1ms
s_ticks++;
}
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
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));
}
static void ethernet_init(void) {
// Initialise Ethernet. Enable MAC GPIO pins, see
// https://www.ti.com/lit/pdf/spms433
// Assign LED3 and LED4 to the EPHY, "activity" and "link", respectively.
// (20.4.2.4)
gpio_init(LED3, GPIO_MODE_AF, GPIO_OTYPE_PUSH_PULL, GPIO_SPEED_HIGH,
GPIO_PULL_NONE, 5); // EN0LED1
gpio_init(LED4, GPIO_MODE_AF, GPIO_OTYPE_PUSH_PULL, GPIO_SPEED_HIGH,
GPIO_PULL_NONE, 5); // EN0LED0
NVIC_EnableIRQ(EMAC0_IRQn); // Setup Ethernet IRQ handler
// Initialize Ethernet clocks, see datasheet section 5
// Turn Flash Prefetch off (silicon errata ETH#02)
uint32_t val = FLASH_CTRL->CONF;
val &= ~BIT(17);
val |= BIT(16);
FLASH_CTRL->CONF = val;
SYSCTL->RCGCEMAC |= BIT(0); // Enable EMAC clock
SYSCTL->SREMAC |= BIT(0); // Reset EMAC
SYSCTL->SREMAC &= ~BIT(0);
SYSCTL->RCGCEPHY |= BIT(0); // Enable EPHY clock
SYSCTL->SREPHY |= BIT(0); // Reset EPHY
SYSCTL->SREPHY &= ~BIT(0);
while (!(SYSCTL->PREMAC & BIT(0)) || !(SYSCTL->PREPHY & BIT(0)))
spin(1); // Wait for reset to complete
}
int main(void) {
gpio_output(LED); // Setup leftmost 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
// 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_tm4c_data driver_data = {.mdc_cr =
1}; // See driver_tm4c.h
struct mg_tcpip_if mif = {
.mac = READ_PREFLASHED_MAC(),
.driver = &mg_tcpip_driver_tm4c,
.driver_data = &driver_data,
};
mg_tcpip_init(&mgr, &mif);
uint32_t val = FLASH_CTRL->CONF; // Turn Flash Prefetch on again
val &= ~BIT(16);
val |= BIT(17);
FLASH_CTRL->CONF = val;
mg_timer_add(&mgr, BLINK_PERIOD_MS, MG_TIMER_REPEAT, timer_fn, &mif);
MG_INFO(("MAC: %M. Waiting for IP...", mg_print_mac, mif.mac));
while (mif.state != MIP_STATE_READY) {
mg_mgr_poll(&mgr, 0);
}
MG_INFO(("Initialising application..."));
extern void device_dashboard_fn(struct mg_connection *, int, void *, void *);
mg_http_listen(&mgr, "http://0.0.0.0", device_dashboard_fn, NULL);
MG_INFO(("Starting event loop"));
for (;;) {
mg_mgr_poll(&mgr, 0);
}
return 0;
}