131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
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/********************************** (C) COPYRIGHT *******************************
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* File Name : CH57x_uart2.c
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* Author : WCH
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* Version : V1.0
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* Date : 2018/12/15
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* Description
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*******************************************************************************/
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#include "CH57x_common.h"
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/*******************************************************************************
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* Function Name : UART2_DefInit
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* Description : 串口默认初始化配置
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* Input : None
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* Return : None
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*******************************************************************************/
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void UART2_DefInit( void )
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{
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UART2_BaudRateCfg( 115200 );
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R8_UART2_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_UART2_LCR = RB_LCR_WORD_SZ;
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R8_UART2_IER = RB_IER_TXD_EN;
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R8_UART2_DIV = 1;
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}
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/*******************************************************************************
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* Function Name : UART2_BaudRateCfg
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* Description : 串口波特率配置
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* Input :
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* Return :
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*******************************************************************************/
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void UART2_BaudRateCfg( UINT32 baudrate )
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{
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UINT32 x;
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x = 10 * GetSysClock() / 8 / baudrate;
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x = ( x + 5 ) / 10;
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R16_UART2_DL = (UINT16)x;
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}
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/*******************************************************************************
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* Function Name : UART2_ByteTrigCfg
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* Description : 串口字节触发中断配置
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* Input : b: 触发字节数
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refer to UARTByteTRIGTypeDef
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* Return :
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*******************************************************************************/
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void UART2_ByteTrigCfg( UARTByteTRIGTypeDef b )
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{
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R8_UART2_FCR = (R8_UART2_FCR&~RB_FCR_FIFO_TRIG)|(b<<6);
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}
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/*******************************************************************************
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* Function Name : UART2_INTCfg
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* Description : 串口中断配置
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* Input : s: 中断控制状态
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ENABLE - 使能相应中断
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DISABLE - 关闭相应中断
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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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* Return : None
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*******************************************************************************/
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void UART2_INTCfg( UINT8 s, UINT8 i )
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{
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if( s )
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{
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R8_UART2_IER |= i;
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R8_UART2_MCR |= RB_MCR_INT_OE;
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}
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else
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{
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R8_UART2_IER &= ~i;
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}
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}
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/*******************************************************************************
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* Function Name : UART2_Reset
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* Description : 串口软件复位
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* Input : None
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* Return : None
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*******************************************************************************/
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void UART2_Reset( void )
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{
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R8_UART2_IER = RB_IER_RESET;
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}
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/*******************************************************************************
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* Function Name : UART2_SendString
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* Description : 串口多字节发送
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* Input : buf - 待发送的数据内容首地址
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l - 待发送的数据长度
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* Return : None
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*******************************************************************************/
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void UART2_SendString( PUINT8 buf, UINT16 l )
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{
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UINT16 len = l;
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while(len)
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{
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if(R8_UART2_TFC != UART_FIFO_SIZE)
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{
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R8_UART2_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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* Function Name : UART2_RecvString
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* Description : 串口读取多字节
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* Input : buf - 读取数据存放缓存区首地址
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* Return : 读取数据长度
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*******************************************************************************/
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UINT16 UART2_RecvString( PUINT8 buf )
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{
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UINT16 len = 0;
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while( R8_UART2_RFC )
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{
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*buf++ = R8_UART2_RBR;
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len ++;
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}
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return (len);
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}
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