145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
#include "stm32f4xx_gpio.h"
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#include "stm32f4xx_rcc.h"
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#include "stm32f4xx_dma.h"
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#include "misc.h"
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#include "bsp.h"
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#include "lwip.h"
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#define MAX_DELAY 0xFFFFFFFU
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#define INTERVAL 500
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static uint32_t EthStatus = 0;
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static volatile uint32_t sysTick = 0;
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static volatile uint32_t cnt = 0;
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void SysTick_Handler(void)
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{
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if (cnt == INTERVAL) {
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GPIO_ToggleBits(GPIOB, GPIO_Pin_14);
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cnt = 0;
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}
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sysTick++;
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cnt++;
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}
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uint32_t getSysTick() {
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return sysTick;
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}
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void delay(uint32_t delay) {
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uint32_t tickStart = getSysTick();
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uint32_t wait = delay;
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if (wait < MAX_DELAY) {
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wait++;
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}
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while((getSysTick() - tickStart) < wait) {}
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}
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void USART2_IRQHandler()
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{
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}
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void gpio_init() {
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const uint16_t led_pins = GPIO_Pin_0 | GPIO_Pin_7 | GPIO_Pin_14;
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const uint16_t usart_pins = GPIO_Pin_5 | GPIO_Pin_6;
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RCC_AHB1PeriphClockCmd(
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RCC_AHB1Periph_GPIOA |
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RCC_AHB1Periph_GPIOB |
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RCC_AHB1Periph_GPIOC |
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RCC_AHB1Periph_GPIOD |
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RCC_AHB1Periph_GPIOG,
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ENABLE
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);
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GPIO_InitTypeDef gpio;
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/***************LED_CONF********************/
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GPIO_StructInit(&gpio);
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gpio.GPIO_Mode = GPIO_Mode_OUT;
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gpio.GPIO_Pin = led_pins;
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GPIO_Init(GPIOB, &gpio);
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GPIO_ResetBits(GPIOB, led_pins);
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/*******************************************/
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/**************UART_CONF********************/
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gpio.GPIO_Mode = GPIO_Mode_AF;
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gpio.GPIO_Pin = usart_pins;
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gpio.GPIO_Speed = GPIO_Speed_50MHz;
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gpio.GPIO_OType = GPIO_OType_PP;
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gpio.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(GPIOD, &gpio);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_USART2);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource6, GPIO_AF_USART2);
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/*******************************************/
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/***************ETH_CONF********************/
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gpio.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_7;
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GPIO_Init(GPIOA, &gpio);
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GPIO_PinAFConfig(GPIOA, GPIO_PinSource1, GPIO_AF_ETH); //RMII ref clock
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GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_ETH); //RMII MDIO
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GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_ETH); //RMII RX Data Valid
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gpio.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5;
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GPIO_Init(GPIOC, &gpio);
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource1, GPIO_AF_ETH); //RMII MDC
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource4, GPIO_AF_ETH); //RMII RXD0
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GPIO_PinAFConfig(GPIOC, GPIO_PinSource5, GPIO_AF_ETH); //RMII RXD1
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gpio.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_13;
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GPIO_Init(GPIOG, &gpio);
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GPIO_PinAFConfig(GPIOG, GPIO_PinSource11, GPIO_AF_ETH); //RMII TX enable
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GPIO_PinAFConfig(GPIOG, GPIO_PinSource13, GPIO_AF_ETH); //RMII TXD0
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gpio.GPIO_Pin = GPIO_Pin_13;
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GPIO_Init(GPIOB, &gpio);
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GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_ETH); //RMII TXD1
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/*******************************************/
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}
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void usart_init() {
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
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USART_InitTypeDef usart;
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usart.USART_BaudRate = 115200;
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usart.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART2, &usart);
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USART_Cmd(USART2, ENABLE);
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}
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void dma_init() {
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
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DMA_InitTypeDef dma;
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dma.DMA_Channel = DMA_Channel_0;
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dma.DMA_DIR = DMA_DIR_MemoryToMemory;
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dma.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
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dma.DMA_MemoryInc = DMA_MemoryInc_Enable;
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dma.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
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dma.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
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dma.DMA_Mode = DMA_Mode_Normal;
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dma.DMA_Priority = DMA_Priority_Low;
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dma.DMA_FIFOMode = DMA_FIFOMode_Enable;
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dma.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
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dma.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
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dma.DMA_MemoryBurst = DMA_MemoryBurst_Single;
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DMA_Init(DMA2_Stream0, &dma);
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}
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void board_init() {
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uint32_t tick = SystemCoreClock/1000;
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SysTick_Config(tick);
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NVIC_EnableIRQ(SysTick_IRQn);
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__enable_irq();
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gpio_init();
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usart_init();
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dma_init();
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init_LWIP();
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delay(50); //wait until periph init
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printf("Controller is started...\r\n");
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}
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