147 lines
5.1 KiB
C
147 lines
5.1 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : bsp_uart.c
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* Author : WCH
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* Version : V1.0
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* Date : 2022/05/10
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* Description : uart cfg.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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#include "bsp_uart.h"
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/* Global Variable */
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struct uart_data uart_data_t;
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/* UART2 */
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u8 UART2_RX_DMA_DataBuf[UART_RX_DMA_SIZE]= {0};
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u8 UART2_TX_DMA_DataBuf[UART_TX_BUF_NUM][ETH_RECEIVE_SIZE] = {0};
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u16 UART2_TX_Buf_Length[UART_TX_BUF_NUM] = {0};
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/**********************************************************************
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* @fn UART_GPIO_Init
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*
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* @brief initialize uart2 GPIO
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*
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* @return none
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* */
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void UART_GPIO_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure={0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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/* UART2 TX-->PA2 RX-->PA3 */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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}
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/**********************************************************************
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* @fn UART_DMA_Init
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*
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* @brief initialize uart2 DMA
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*
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* @return none
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* */
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void UART_DMA_Init(void)
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{
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DMA_InitTypeDef DMA_InitStructure = {0};
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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/* UART2 TX-->DMA1_Channel7 RX-->DMA1_Channel6 */
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DMA_DeInit(DMA1_Channel7);
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DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART2->DATAR);
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DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)uart_data_t.TX_buffer;
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
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//DMA_InitStructure.DMA_BufferSize = size(TX_DMA_dataBuf);
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
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DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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DMA_Init(DMA1_Channel7, &DMA_InitStructure);
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DMA_DeInit(DMA1_Channel6);
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DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&USART2->DATAR);
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DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)uart_data_t.RX_buffer;
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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DMA_InitStructure.DMA_BufferSize = (uint32_t)UART_RX_DMA_SIZE;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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DMA_Init(DMA1_Channel6, &DMA_InitStructure);
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DMA_ClearFlag(DMA1_IT_TC7);
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DMA_Cmd(DMA1_Channel6, ENABLE);
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USART_DMACmd(USART2,USART_DMAReq_Rx|USART_DMAReq_Tx,ENABLE);
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}
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/**********************************************************************
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* @fn UART_Interrupt_Init
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*
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* @brief initialize uart2 interrupt
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*
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* @return none
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* */
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void UART_Interrupt_Init(void)
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{
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NVIC_InitTypeDef NVIC_InitStructure = {0};
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/* UART2 TX-->DMA1_Channel7 RX-->DMA1_Channel6 */
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DMA_ITConfig(DMA1_Channel7,DMA_IT_TC,ENABLE);
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NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel7_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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}
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/**********************************************************************
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* @fn BSP_Uart_Init
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*
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* @brief initialize uart2
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*
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* @return none
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* */
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void BSP_Uart_Init(uint32_t baudrate )
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{
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USART_InitTypeDef USART_InitStructure = {0};
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UART_GPIO_Init();
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/* USART2 TX-->PA2 RX-->PA3 */
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uart_data_t.RX_buffer = UART2_RX_DMA_DataBuf;
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uart_data_t.TX_buffer = &UART2_TX_DMA_DataBuf[0];
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uart_data_t.TX_data_length = UART2_TX_Buf_Length;
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uart_data_t.rx_read = 0;
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uart_data_t.rx_write = 0;
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uart_data_t.last_RX_DMA_length = UART_RX_DMA_SIZE;
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uart_data_t.RX_data_length = 0;
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uart_data_t.tx_read = 0;
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uart_data_t.tx_write = 0;
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uart_data_t.tx_remainBuffNum = UART_TX_BUF_NUM;
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uart_data_t.uart_tx_dma_state = IDLE;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
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USART_InitStructure.USART_BaudRate = baudrate;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
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USART_Init(USART2, &USART_InitStructure);
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USART_Cmd(USART2, ENABLE);
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UART_DMA_Init();
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UART_Interrupt_Init();
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}
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