152 lines
3.6 KiB
C
152 lines
3.6 KiB
C
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/********************************** (C) COPYRIGHT *******************************
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* File Name : CH59x_uart3.c
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* Author : WCH
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* Version : V1.2
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* Date : 2021/11/17
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* Description
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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 "CH59x_common.h"
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/*********************************************************************
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* @fn UART3_DefInit
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*
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* @brief 串口默认初始化配置
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*
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* @param none
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*
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* @return none
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*/
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void UART3_DefInit(void)
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{
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UART3_BaudRateCfg(115200);
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R8_UART3_FCR = (2 << 6) | RB_FCR_TX_FIFO_CLR | RB_FCR_RX_FIFO_CLR | RB_FCR_FIFO_EN; // FIFO打开，触发点4字节
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R8_UART3_LCR = RB_LCR_WORD_SZ;
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R8_UART3_IER = RB_IER_TXD_EN;
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R8_UART3_DIV = 1;
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}
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/*********************************************************************
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* @fn UART3_BaudRateCfg
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*
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* @brief 串口波特率配置
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*
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* @param baudrate - 波特率
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*
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* @return none
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*/
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void UART3_BaudRateCfg(uint32_t baudrate)
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{
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uint32_t x;
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x = 10 * GetSysClock() / 8 / baudrate;
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x = (x + 5) / 10;
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R16_UART3_DL = (uint16_t)x;
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}
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/*********************************************************************
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* @fn UART3_ByteTrigCfg
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*
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* @brief 串口字节触发中断配置
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*
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* @param b - 触发字节数 refer to UARTByteTRIGTypeDef
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*
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* @return none
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*/
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void UART3_ByteTrigCfg(UARTByteTRIGTypeDef b)
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{
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R8_UART3_FCR = (R8_UART3_FCR & ~RB_FCR_FIFO_TRIG) | (b << 6);
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}
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/*********************************************************************
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* @fn UART3_INTCfg
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*
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* @brief 串口中断配置
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*
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* @param s - 中断控制状态，是否使能相应中断
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* @param i - 中断类型
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* RB_IER_MODEM_CHG - 调制解调器输入状态变化中断使能位（仅 UART0 支持）
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* RB_IER_LINE_STAT - 接收线路状态中断
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* RB_IER_THR_EMPTY - 发送保持寄存器空中断
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* RB_IER_RECV_RDY - 接收数据中断
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*
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* @return none
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*/
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void UART3_INTCfg(FunctionalState s, uint8_t i)
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{
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if(s)
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{
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R8_UART3_IER |= i;
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R8_UART3_MCR |= RB_MCR_INT_OE;
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}
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else
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{
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R8_UART3_IER &= ~i;
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}
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}
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/*********************************************************************
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* @fn UART3_Reset
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*
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* @brief 串口软件复位
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*
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* @param none
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*
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* @return none
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*/
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void UART3_Reset(void)
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{
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R8_UART3_IER = RB_IER_RESET;
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}
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/*********************************************************************
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* @fn UART3_SendString
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*
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* @brief 串口多字节发送
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*
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* @param buf - 待发送的数据内容首地址
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* @param l - 待发送的数据长度
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*
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* @return none
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*/
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void UART3_SendString(uint8_t *buf, uint16_t l)
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{
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uint16_t len = l;
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while(len)
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{
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if(R8_UART3_TFC != UART_FIFO_SIZE)
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{
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R8_UART3_THR = *buf++;
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len--;
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}
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}
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}
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/*********************************************************************
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* @fn UART3_RecvString
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*
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* @brief 串口读取多字节
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*
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* @param buf - 读取数据存放缓存区首地址
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*
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* @return 读取数据长度
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*/
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uint16_t UART3_RecvString(uint8_t *buf)
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{
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uint16_t len = 0;
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while(R8_UART3_RFC)
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{
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*buf++ = R8_UART3_RBR;
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len++;
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}
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return (len);
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}
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