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107 lines
2.6 KiB
107 lines
2.6 KiB
/********************************** (C) COPYRIGHT *******************************
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* File Name : Main.c
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* Author : WCH
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* Version : V1.0
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* Date : 2020/08/06
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* Description : 串口1收发演示
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* SPDX-License-Identifier: Apache-2.0
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*******************************************************************************/
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#include "CH58x_common.h"
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uint8_t TxBuff[] = "This is a tx exam\r\n";
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uint8_t RxBuff[100];
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uint8_t trigB;
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/*********************************************************************
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* @fn main
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*
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* @brief 主函数
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*
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* @return none
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*/
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int main()
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{
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uint8_t len;
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SetSysClock(CLK_SOURCE_PLL_60MHz);
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/* 配置串口1：先配置IO口模式，再配置串口 */
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GPIOA_SetBits(GPIO_Pin_9);
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GPIOA_ModeCfg(GPIO_Pin_8, GPIO_ModeIN_PU); // RXD-配置上拉输入
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GPIOA_ModeCfg(GPIO_Pin_9, GPIO_ModeOut_PP_5mA); // TXD-配置推挽输出，注意先让IO口输出高电平
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UART1_DefInit();
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#if 1 // 测试串口发送字符串
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UART1_SendString(TxBuff, sizeof(TxBuff));
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#endif
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#if 1 // 查询方式：接收数据后发送出去
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while(1)
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{
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len = UART1_RecvString(RxBuff);
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if(len)
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{
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UART1_SendString(RxBuff, len);
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}
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}
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#endif
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#if 0 // 中断方式：接收数据后发送出去
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UART1_ByteTrigCfg(UART_7BYTE_TRIG);
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trigB = 7;
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UART1_INTCfg(ENABLE, RB_IER_RECV_RDY | RB_IER_LINE_STAT);
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PFIC_EnableIRQ(UART1_IRQn);
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#endif
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while(1);
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}
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/*********************************************************************
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* @fn UART1_IRQHandler
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*
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* @brief UART1中断函数
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*
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* @return none
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*/
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__INTERRUPT
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__HIGH_CODE
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void UART1_IRQHandler(void)
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{
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volatile uint8_t i;
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switch(UART1_GetITFlag())
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{
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case UART_II_LINE_STAT: // 线路状态错误
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{
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UART1_GetLinSTA();
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break;
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}
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case UART_II_RECV_RDY: // 数据达到设置触发点
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for(i = 0; i != trigB; i++)
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{
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RxBuff[i] = UART1_RecvByte();
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UART1_SendByte(RxBuff[i]);
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}
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break;
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case UART_II_RECV_TOUT: // 接收超时，暂时一帧数据接收完成
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i = UART1_RecvString(RxBuff);
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UART1_SendString(RxBuff, i);
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break;
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case UART_II_THR_EMPTY: // 发送缓存区空，可继续发送
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break;
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case UART_II_MODEM_CHG: // 只支持串口0
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break;
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default:
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break;
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}
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}
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