122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
#include <stdio.h>
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#include "ch32fun.h"
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#include "ch32v20xhw.h"
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#include "ethernetif.h"
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#include "lwip/dhcp.h"
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#include "lwip/init.h"
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#include "lwip/netif.h"
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#include "lwip/timeouts.h"
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#include "netif/ethernet.h"
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#include "systick.h"
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#define LED1_PIN 0
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#define LED2_PIN 2
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#define RCC_PREDIV1_OFFSET 0
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struct netif g_netif;
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void init_leds() {
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RCC->APB2PCENR |= RCC_APB2Periph_GPIOA;
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GPIOA->CFGLR &= ~((0xf << (4 * 0)) | (0xf << (4 * 2)));
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GPIOA->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_PP) << (4 * 0);
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GPIOA->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_PP) << (4 * 2);
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}
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int main() {
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SystemInit();
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// 1. HSE (32MHz)
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// 2. PREDIV1 / 4.
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// 3. PLL source = HSE, PLL x15.
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// 4. (32MHz / 4) * 15 = 120MHz SYSCLK
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RCC->INTR = 0x009F0000;
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RCC->CTLR &= ~(RCC_HSE_ON | RCC_PLLON);
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RCC->CFGR0 = 0x00000000;
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RCC->CTLR |= RCC_HSE_ON;
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int timeout;
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for (timeout = 10000; timeout > 0; timeout--) {
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if (RCC->CTLR & RCC_HSERDY) break; // wait for HSE
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}
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if (timeout == 0) {
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printf("Error: HSE failed to start\n");
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return -1;
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}
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RCC->CFGR0 |= (uint32_t)RCC_PPRE1_DIV2;
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RCC->CFGR2 = ((3) << 0); // PREDIV1 divisor = 3+1 = 4
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RCC->CFGR0 |= RCC_PLLSource_HSE_Div1 | RCC_PLLMul_15;
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RCC->CTLR |= RCC_PLLON;
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printf("Main PLL enabled. Waiting for lock...\n");
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for (timeout = 10000; timeout > 0; timeout--) {
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if (RCC->CTLR & RCC_PLLRDY) break;
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}
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if (timeout == 0) {
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printf("error: main pll lock failed\n");
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return -1;
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}
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printf("Main PLL Locked\n");
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RCC->CFGR0 = (RCC->CFGR0 & ~RCC_SW) | RCC_SW_PLL;
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while ((RCC->CFGR0 & RCC_SWS) != RCC_SWS_PLL);
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printf("SysClock set to 120MHz\n");
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systick_init();
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init_leds();
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lwip_init();
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ip_addr_t ipaddr, netmask, gw;
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IP4_ADDR(&ipaddr, 0, 0, 0, 0);
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IP4_ADDR(&netmask, 0, 0, 0, 0);
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IP4_ADDR(&gw, 0, 0, 0, 0);
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netif_add(&g_netif, &ipaddr, &netmask, &gw, NULL, ðernetif_init,
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ðernet_input);
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// netif_set_link_callback(&g_netif, link_status_callback);
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netif_set_default(&g_netif);
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netif_set_up(&g_netif);
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dhcp_start(&g_netif);
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uint32_t last_led_toggle = 0;
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uint32_t last_send_time = 0;
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int led_state = 0;
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while (1) {
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ethernetif_link_poll(&g_netif);
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if (netif_is_link_up(&g_netif)) {
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ethernetif_input(&g_netif);
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}
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sys_check_timeouts();
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// run_tx_test();
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uint32_t now = millis();
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if (now - last_led_toggle > 500) {
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if (led_state) {
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GPIOA->BSHR = (1 << 0);
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} else {
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GPIOA->BSHR = (1 << (0 + 16));
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}
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led_state = !led_state;
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last_led_toggle = now;
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}
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static int ip_printed = 0;
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if (g_netif.ip_addr.addr != 0 && !ip_printed) {
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printf("IP address assigned: %s\n",
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ip4addr_ntoa(netif_ip4_addr(&g_netif)));
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ip_printed = 1;
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}
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}
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} |