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https://github.com/cesanta/mongoose.git
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102 lines
3.8 KiB
C
102 lines
3.8 KiB
C
// Copyright (c) 2022 Cesanta Software Limited
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// All rights reserved
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#include "mcu.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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// HTTP server event handler function
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static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
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if (ev == MG_EV_HTTP_MSG) {
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struct mg_http_message *hm = (struct mg_http_message *) ev_data;
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if (mg_http_match_uri(hm, "/api/debug")) {
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int level = mg_json_get_long(hm->body, "$.level", MG_LL_DEBUG);
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mg_log_set(level);
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mg_http_reply(c, 200, "", "Debug level set to %d\n", level);
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} else {
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mg_http_reply(c, 200, "", "%s\n", "hi");
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}
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}
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(void) fn_data;
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}
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static void ethernet_init(void) {
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// See datasheet: 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_enable_irq(40); // 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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volatile uint32_t *IMC = (uint32_t *) 0x400FD000;
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uint32_t val = IMC[0xFC8 / sizeof(*IMC)];
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val &= ~BIT(17);
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val |= BIT(16);
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IMC[0xFC8 / sizeof(*IMC)] = 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 MIP 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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MG_INFO(("Initializing Ethernet driver"));
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ethernet_init();
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struct mg_tcpip_driver_tm4c_data driver_data = {.mdc_cr = 1}; // See driver_tm4c.h
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struct mg_tcpip_if mif = {
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.mac = {2, 0, 1, 2, 3, 5},
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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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volatile uint32_t *IMC = (uint32_t *) 0x400FD000;
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uint32_t val = IMC[0xFC8 / sizeof(*IMC)]; // Turn Flash Prefetch on again
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val &= ~BIT(16);
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val |= BIT(17);
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IMC[0xFC8 / sizeof(*IMC)] = val;
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MG_INFO(("Starting Mongoose v%s", MG_VERSION)); // Tell the world
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mg_http_listen(&mgr, "http://0.0.0.0", fn, &mgr); // Web listener
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while (args == NULL) mg_mgr_poll(&mgr, 1000); // Infinite event loop
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mg_mgr_free(&mgr); // Unreachable
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}
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static void blinker(void *args) {
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gpio_init(LED1, 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(LED1);
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vTaskDelay(pdMS_TO_TICKS(750));
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(void) args; // MG_INFO(("blink %s, RAM: %u", (char *) args,
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// xPortGetFreeHeapSize()));
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}
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}
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int main(void) {
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clock_init(); // Set clock to 120MHz
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systick_init(FREQ / 1000); // Tick every 1 ms
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uart_init(UART_DEBUG, 115200); // Initialise UART
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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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