326 lines
9.3 KiB
C
326 lines
9.3 KiB
C
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/*
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******************************************************************************
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* @file driver_uart.c
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* @author FreqChip Firmware Team
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* @version V1.0.0
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* @date 2021
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* @brief UART module driver.
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* This file provides firmware functions to manage the
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* Universal Asynchronous Receiver/Transmitter (UART) peripheral
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2021 FreqChip.
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* All rights reserved.
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******************************************************************************
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*/
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#include "fr30xx.h"
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/************************************************************************************
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* @fn uart_IRQHandler
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*
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* @brief Handle UART interrupt request.
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*
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* @param huart: UART handle.
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*/
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__WEAK void uart_IRQHandler(UART_HandleTypeDef *huart)
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{
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switch (__UART_INT_GET_ID(huart->UARTx))
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{
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case INT_INDEX_TXE:
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{
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/* Data transit end */
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if (huart->u32_TxCount >= huart->u32_TxSize)
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{
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__UART_INT_TXE_DISABLE(huart->UARTx);
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huart->b_TxBusy = false;
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}
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else
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{
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/* UART_FIFO_ENABLE */
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if (__UART_IS_FIFO_Enable(huart))
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{
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/* Until TxFIFO full */
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while(!__UART_IS_TxFIFO_FULL(huart->UARTx))
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{
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huart->UARTx->DATA_DLL.DATA = huart->p_TxData[huart->u32_TxCount++];
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/* Data transit end */
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if (huart->u32_TxCount >= huart->u32_TxSize)
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{
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__UART_INT_TXE_DISABLE(huart->UARTx);
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huart->b_TxBusy = false;
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if (huart->TxCpltCallback != NULL)
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{
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huart->TxCpltCallback(huart);
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}
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break;
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}
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}
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}
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else
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{
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huart->UARTx->DATA_DLL.DATA = huart->p_TxData[huart->u32_TxCount++];
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}
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}
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}break;
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case INT_INDEX_RX:
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case INT_INDEX_RX_TOUT:
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{
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/* Rx ready */
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while (huart->UARTx->LSR.LSR_BIT.DR)
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{
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huart->p_RxData[huart->u32_RxCount++] = huart->UARTx->DATA_DLL.DATA;
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/* Data receive end */
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if (huart->u32_RxCount >= huart->u32_RxSize)
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{
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__UART_INT_RX_DISABLE(huart->UARTx);
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huart->b_RxBusy = false;
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if (huart->RxCpltCallback != NULL)
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{
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huart->RxCpltCallback(huart);
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}
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break;
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}
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}
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}break;
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default: break;
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}
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}
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/************************************************************************************
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* @fn uart_init
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*
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* @brief Initialize the UART according to the specified parameters in the struct_UARTInit_t
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*
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* @param huart: UART handle.
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*/
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void uart_init(UART_HandleTypeDef *huart)
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{
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/* Config Data Length */
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huart->UARTx->LCR.Bits.DLS = huart->Init.DataLength;
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/* Config Stop Bits*/
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huart->UARTx->LCR.Bits.STOP = huart->Init.StopBits;
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/* Config Auto Flow */
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if(huart->Init.AUTO_FLOW)
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{
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__UART_AUTO_FLOW_CONTROL_ENABLE( huart->UARTx);
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}
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/* Config Parity */
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if (huart->Init.Parity != UART_PARITY_NONE)
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{
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huart->UARTx->LCR.Bits.PEN = 1;
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switch (huart->Init.Parity)
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{
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case UART_PARITY_ODD: huart->UARTx->LCR.Bits.SP = 0; huart->UARTx->LCR.Bits.EPS = 0; break;
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case UART_PARITY_EVEN: huart->UARTx->LCR.Bits.SP = 0; huart->UARTx->LCR.Bits.EPS = 1; break;
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case UART_PARITY_0: huart->UARTx->LCR.Bits.SP = 1; huart->UARTx->LCR.Bits.EPS = 1; break;
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case UART_PARITY_1: huart->UARTx->LCR.Bits.SP = 1; huart->UARTx->LCR.Bits.EPS = 0; break;
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default: break;
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}
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}
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else
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{
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huart->UARTx->LCR.Bits.PEN = 0;
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}
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/* Config FIFO<46><4F>DMA<4D><41>RxFIF/TxFIFO threshold */
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huart->FCR_Shadow = huart->Init.FIFO_Mode | (huart->Init.FIFO_Mode << FCR_DMAM);
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huart->UARTx->FCR_IID.FCR = huart->FCR_Shadow;
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/* Config BaudRate */
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uart_config_baudRate(huart);
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}
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/************************************************************************************
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* @fn uart_transmit
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*
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* @brief Send an amount of data in blocking mode.
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*
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* @param huart: UART handle.
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* @param fp_Data: Pointer to data buffer.
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* @param fu32_Size: Amount of data to be sent.
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*/
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void uart_transmit(UART_HandleTypeDef *huart, uint8_t *fp_Data, uint32_t fu32_Size)
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{
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/* UART_FIFO_ENABLE */
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if (__UART_IS_FIFO_Enable(huart))
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{
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while (fu32_Size--)
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{
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/* TxFIFO FULL */
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while(!(huart->UARTx->USR.TFNF));
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/* Send data */
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huart->UARTx->DATA_DLL.DATA = *fp_Data++;
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}
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}
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else
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{
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while (fu32_Size--)
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{
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/* Tx not empty */
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while(!(huart->UARTx->LSR.LSR_BIT.THRE));
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/* Send data */
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huart->UARTx->DATA_DLL.DATA = *fp_Data++;
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}
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}
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}
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/************************************************************************************
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* @fn uart_receive
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*
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* @brief Receive an amount of data in blocking mode.
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*
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* @param huart: UART handle.
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* @param fp_Data: Pointer to data buffer.
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* @param fu32_Size: Amount of data to be receive.
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*/
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void uart_receive(UART_HandleTypeDef *huart, uint8_t *fp_Data, uint32_t fu32_Size)
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{
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while (fu32_Size--)
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{
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/* Rx ready */
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while (!(huart->UARTx->LSR.LSR_BIT.DR));
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/* receive data */
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*fp_Data++ = huart->UARTx->DATA_DLL.DATA;
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}
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}
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/************************************************************************************
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* @fn uart_transmit_IT
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*
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* @brief Send an amount of data in interrupt mode.
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*
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* @param huart: UART handle.
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* @param fp_Data: Pointer to data buffer.
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* @param fu32_Size: Amount of data to be sent.
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*/
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void uart_transmit_IT(UART_HandleTypeDef *huart, uint8_t *fp_Data, uint32_t fu32_Size)
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{
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if (huart->b_TxBusy)
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return;
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huart->p_TxData = fp_Data;
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huart->u32_TxCount = 0;
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huart->u32_TxSize = fu32_Size;
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huart->b_TxBusy = true;
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/* UART_FIFO_ENABLE */
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if (__UART_IS_FIFO_Enable(huart))
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{
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// /* Tx FIFO reset */
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// __UART_TxFIFO_Reset(huart);
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/* Tx empty interrupt and fifo enable */
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__UART_INT_TXE_ENABLE_FE(huart->UARTx);
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}
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else
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{
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/* Tx empty interrupt and fifo disable */
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__UART_INT_TXE_ENABLE_FD(huart->UARTx);
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}
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}
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/************************************************************************************
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* @fn uart_transmit_IT
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*
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* @brief Receive an amount of data in interrupt mode.
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*
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* @param huart: UART handle.
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* @param fp_Data: Pointer to data buffer.
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* @param fu32_Size: Amount of data to be receive.
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*/
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void uart_receive_IT(UART_HandleTypeDef *huart, uint8_t *fp_Data, uint32_t fu32_Size)
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{
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if (huart->b_RxBusy)
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return;
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huart->p_RxData = fp_Data;
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huart->u32_RxCount = 0;
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huart->u32_RxSize = fu32_Size;
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huart->b_RxBusy = true;
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// /* Rx FIFO reset */
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// __UART_RxFIFO_Reset(huart);
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/* data ready<64><79>character timeout interrupt enable */
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__UART_INT_RX_ENABLE(huart->UARTx);
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}
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/************************************************************************************
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* @fn uart_config_baudRate
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*
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* @brief Config BaudRate
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*
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* @param huart: UART handle.
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*/
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void uart_config_baudRate(UART_HandleTypeDef *huart)
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{
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uint32_t i;
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uint32_t lu32_UartClock;
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uint32_t lu32_Integer;
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uint64_t lu64_Fractional;
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uint16_t lu32_TempValue[2];
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lu32_UartClock = system_get_peripheral_clock(PER_CLK_UARTx);
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/* Calculate the integer part */
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lu32_Integer = lu32_UartClock / (16 * huart->Init.BaudRate);
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/* Calculate the fractional part */
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lu64_Fractional = lu32_UartClock % (16 * huart->Init.BaudRate);
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lu64_Fractional = (lu64_Fractional * 10000) / (16 * huart->Init.BaudRate);
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for (i = 0; i < 0x3F; i++)
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{
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lu32_TempValue[0] = (i * 10000) / 64;
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lu32_TempValue[1] = ((i + 1) * 10000) / 64;
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if (lu64_Fractional >= lu32_TempValue[0] && lu64_Fractional <= lu32_TempValue[1])
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{
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if (lu64_Fractional - lu32_TempValue[0] < lu32_TempValue[1] - lu64_Fractional)
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{
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lu64_Fractional = i;
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}
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else
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{
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lu64_Fractional = i + 1;
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}
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break;
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}
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else if (i == 0x3E)
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{
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lu64_Fractional = 0x3F;
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}
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}
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/* DLL<4C><4C>DLH register access enable */
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__UART_DLL_DLH_ACCESS_ENABLE(huart->UARTx);
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huart->UARTx->DATA_DLL.DLL = lu32_Integer & 0xFF;
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huart->UARTx->IER_DLH.DLH = (lu32_Integer >> 8) & 0xFF;
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huart->UARTx->DLF.DLF = lu64_Fractional;
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/* DLL<4C><4C>DLH register access disable */
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__UART_DLL_DLH_ACCESS_DISABLE(huart->UARTx);
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}
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