105 lines
3.6 KiB
C
105 lines
3.6 KiB
C
// Copyright (c) 2022-2023 Cesanta Software Limited
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// All rights reserved
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#include "hal.h"
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#include "mongoose.h"
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#define LED1 PIN('N', 1) // On-board LED pin
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#define LED2 PIN('N', 0) // On-board LED pin
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#define LED3 PIN('F', 4) // On-board LED pin
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#define LED4 PIN('F', 0) // On-board LED pin
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#define LED LED1 // Use this LED for blinking
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#define BLINK_PERIOD_MS 1000 // LED blinking period in millis
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static void timer_fn(void *arg) {
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struct mg_tcpip_if *ifp = arg; // And show
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const char *names[] = {"down", "up", "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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static void ethernet_init(void) {
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// Initialise Ethernet. Enable MAC GPIO pins, see
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// https://www.ti.com/lit/pdf/spms433
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// Assign LED3 and LED4 to the EPHY, "activity" and "link", respectively.
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// (20.4.2.4)
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gpio_init(LED3, GPIO_MODE_AF, GPIO_OTYPE_PUSH_PULL, GPIO_SPEED_HIGH,
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GPIO_PULL_NONE, 5); // EN0LED1
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gpio_init(LED4, GPIO_MODE_AF, GPIO_OTYPE_PUSH_PULL, GPIO_SPEED_HIGH,
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GPIO_PULL_NONE, 5); // EN0LED0
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NVIC_EnableIRQ(EMAC0_IRQn); // Setup Ethernet IRQ handler
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// Initialize Ethernet clocks, see datasheet section 5
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// Turn Flash Prefetch off (silicon errata ETH#02)
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uint32_t val = FLASH_CTRL->CONF;
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val &= ~BIT(17);
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val |= BIT(16);
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FLASH_CTRL->CONF = val;
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SYSCTL->RCGCEMAC |= BIT(0); // Enable EMAC clock
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SYSCTL->SREMAC |= BIT(0); // Reset EMAC
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SYSCTL->SREMAC &= ~BIT(0);
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SYSCTL->RCGCEPHY |= BIT(0); // Enable EPHY clock
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SYSCTL->SREPHY |= BIT(0); // Reset EPHY
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SYSCTL->SREPHY &= ~BIT(0);
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while (!(SYSCTL->PREMAC & BIT(0)) || !(SYSCTL->PREPHY & BIT(0)))
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spin(1); // Wait for reset to complete
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}
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static void server(void *args) {
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struct mg_mgr mgr; // Initialise Mongoose event manager
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mg_mgr_init(&mgr); // and attach it to the interface
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mg_log_set(MG_LL_DEBUG); // Set log level
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// Initialise Mongoose network stack
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// Specify MAC address, and IP/mask/GW in network byte order for static
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// IP configuration. If IP/mask/GW are unset, DHCP is going to be used
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ethernet_init();
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struct mg_tcpip_driver_tm4c_data driver_data = {.mdc_cr = 1};
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struct mg_tcpip_if mif = {
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.mac = READ_PREFLASHED_MAC(),
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.driver = &mg_tcpip_driver_tm4c,
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.driver_data = &driver_data,
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};
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mg_tcpip_init(&mgr, &mif);
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uint32_t val = FLASH_CTRL->CONF; // Turn Flash Prefetch on again
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val &= ~BIT(16);
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val |= BIT(17);
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FLASH_CTRL->CONF = val;
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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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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, 1); // Infinite event loop
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(void) args;
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}
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static void blinker(void *args) {
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gpio_init(LED, GPIO_MODE_OUTPUT, GPIO_OTYPE_PUSH_PULL, GPIO_SPEED_HIGH,
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GPIO_PULL_NONE, 0);
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for (;;) {
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gpio_toggle(LED);
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vTaskDelay(pdMS_TO_TICKS(BLINK_PERIOD_MS));
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}
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(void) args;
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}
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int main(void) {
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uart_init(UART_DEBUG, 115200); // Initialise UART
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// Start tasks. NOTE: stack sizes are in 32-bit words
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xTaskCreate(blinker, "blinker", 128, ":)", configMAX_PRIORITIES - 1, NULL);
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xTaskCreate(server, "server", 2048, 0, configMAX_PRIORITIES - 1, NULL);
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vTaskStartScheduler(); // This blocks
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return 0;
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}
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