125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
#ifndef _CUSTOM_USART_
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#define _CUSTOM_USART_
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#include "custom_usart.h"
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UART_HandleTypeDef huart_boot;
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DMA_HandleTypeDef hdma_usart_boot_rx;
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// CUSTOM UART INIT
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// DMA INIT (RCC, NVIC) SHOULD BE ADDED IN DMA.C
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void User_UART_Init(UART_HandleTypeDef* huart, DMA_HandleTypeDef *DMAhuart, struct UARTSettings *uuart)
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{ // function takes uart handler, dma handler and setting structure for init
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// get setting for uart from UARTSettings structure
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huart->Instance = uuart->UARTx;
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huart->Init.BaudRate = uuart->UART_Speed;
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// everything else is default (for now, maybe this settings would be added in UARTSettings structure later)
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huart->Init.WordLength = UART_WORDLENGTH_8B;
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huart->Init.StopBits = UART_STOPBITS_1;
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huart->Init.Parity = UART_PARITY_NONE;
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huart->Init.Mode = UART_MODE_TX_RX;
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huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
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huart->Init.OverSampling = UART_OVERSAMPLING_16;
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if (HAL_UART_Init(huart) != HAL_OK)
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{
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Error_Handler();
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}
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// init gpio from UARTSettings structure
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UART_GPIO_Init(uuart->GPIOx, uuart->GPIO_PIN_RX, uuart->GPIO_PIN_TX);
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// init dma from UARTSettings structure if need
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if (uuart->DMAChannel != 0)
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UART_DMA_Init(huart, DMAhuart, uuart->DMAChannel);
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}
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void UART_GPIO_Init(GPIO_TypeDef *GPIOx, uint16_t GPIO_PIN_RX, uint16_t GPIO_PIN_TX)
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{ // function takes port and pins (for rx and tx)
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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// choose port for enable clock
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if (GPIOx==GPIOA)
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__HAL_RCC_GPIOA_CLK_ENABLE();
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else if (GPIOx==GPIOB)
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__HAL_RCC_GPIOB_CLK_ENABLE();
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else if (GPIOx==GPIOC)
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__HAL_RCC_GPIOC_CLK_ENABLE();
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else if (GPIOx==GPIOD)
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__HAL_RCC_GPIOD_CLK_ENABLE();
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// USART3 GPIO Configuration
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//GPIO_PIN_TX ------> USART_TX
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GPIO_InitStruct.Pin = GPIO_PIN_TX;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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HAL_GPIO_Init(GPIOx, &GPIO_InitStruct);
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// GPIO_PIN_RX ------> USART_RX
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GPIO_InitStruct.Pin = GPIO_PIN_RX;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(GPIOx, &GPIO_InitStruct);
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}
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void UART_DMA_Init(UART_HandleTypeDef *huart, DMA_HandleTypeDef *hdma_rx, DMA_Channel_TypeDef *DMAhuart)
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{ // function takes uart and dma handlers and dmachannel for uart
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// for now only dma rx is supported, tx maybe later if needed
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/* USART3 DMA Init */
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/* USART3_RX Init */
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hdma_rx->Instance = DMAhuart;
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hdma_rx->Init.Direction = DMA_PERIPH_TO_MEMORY;
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hdma_rx->Init.PeriphInc = DMA_PINC_DISABLE;
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hdma_rx->Init.MemInc = DMA_MINC_ENABLE;
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hdma_rx->Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
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hdma_rx->Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
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hdma_rx->Init.Mode = DMA_CIRCULAR;
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hdma_rx->Init.Priority = DMA_PRIORITY_LOW;
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if (HAL_DMA_Init(hdma_rx) != HAL_OK)
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{
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Error_Handler();
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}
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__USER_LINKDMA(huart,hdmarx,hdma_rx);
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// __USER_LINKDMA is need because __HAL_LINKDMA is written for global defined hdma_rx
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// so you get error because hal uses . insted of ->
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}
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void HAL_UART_MspInit(UART_HandleTypeDef* huart) // redefine hal function
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{ // left only rcc and interrupt init for USART_1,2,3 (maybe UART_4,5 need to be added)
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// GPIO and DMA init was move to their own functions
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if(huart->Instance==USART3)
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{
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/* USART3 clock enable */
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__HAL_RCC_USART3_CLK_ENABLE();
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/* USART3 interrupt Init */
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HAL_NVIC_SetPriority(USART3_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(USART3_IRQn);
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}
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else if(huart->Instance==USART2)
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{
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/* USART3 clock enable */
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__HAL_RCC_USART2_CLK_ENABLE();
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/* USART3 interrupt Init */
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HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(USART2_IRQn);
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}
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else if(huart->Instance==USART1)
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{
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/* USART3 clock enable */
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__HAL_RCC_USART1_CLK_ENABLE();
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/* USART3 interrupt Init */
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HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
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HAL_NVIC_EnableIRQ(USART1_IRQn);
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}
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}
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#endif |