142 lines
4.3 KiB
C
142 lines
4.3 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : Main program body.
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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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/*
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*@Note
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*Hardware flow control mode, master/slave mode, transceiver routine:
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*USART1_Tx(PA9)\USART1_Rx(PA10)\USART1_CTS(PA11)\USART1_RTS(PA12)
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*This example demonstrates UART1 hardware flow control data sending and receiving,
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*connect the UART1 Tx and Rx pins to the serial port tool respectively,
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*View through the host computer tool, CTS is connected to VCC, and data cannot be sent,
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*but connected to GND, data can be sent normally.
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*
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*/
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#include "debug.h"
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/* Global typedef */
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typedef enum
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{
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FAILED = 0,
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PASSED = !FAILED
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} TestStatus;
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/* Global define */
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#define TxSize (size(TxBuffer))
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#define size(a) (sizeof(a) / sizeof(*(a)))
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/* Global Variable */
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u8 TxBuffer[] = "USART1 Hardware Flow Control Example: USART1-\
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Hyperterminal communication using hardware flow control\n\r";
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u8 RxBuffer[TxSize] = {0};
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u8 TxCnt = 0, RxCnt = 0;
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/*********************************************************************
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* @fn Buffercmp
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*
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* @brief Compares two buffers
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*
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* @param Buf1,Buf2 - buffers to be compared
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* BufferLength - buffer's length
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*
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* @return PASSED - Buf1 identical to Buf
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* FAILED - Buf1 differs from Buf2
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*/
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TestStatus Buffercmp(uint8_t *Buf1, uint8_t *Buf2, uint16_t BufLength)
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{
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while(BufLength--)
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{
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if(*Buf1 != *Buf2)
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{
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return FAILED;
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}
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Buf1++;
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Buf2++;
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}
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return PASSED;
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}
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/*********************************************************************
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* @fn USART1_ReCFG
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*
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* @brief Reinitialize the USART1.
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*
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* @return none
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*/
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void USART1_ReCFG(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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USART_InitTypeDef USART_InitStructure = {0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1, ENABLE);
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/* USART1 TX-->A.9 RX-->A.10 */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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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_12; /* RTS-->A.12 */
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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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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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; /* CTS-->A.11 */
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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USART_InitStructure.USART_BaudRate = 115200;
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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_RTS_CTS;
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USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
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USART_Init(USART1, &USART_InitStructure);
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USART_Cmd(USART1, ENABLE);
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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SystemCoreClockUpdate();
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Delay_Init();
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USART1_ReCFG();
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printf("SystemClk:%d\r\n", SystemCoreClock);
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printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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printf("USART1 Hardware Flow Control TEST\r\n");
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while(TxCnt < TxSize)
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{
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USART_SendData(USART1, TxBuffer[TxCnt++]);
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while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
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}
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do
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{
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if((USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET) && (RxCnt < TxSize))
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{
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RxBuffer[RxCnt] = USART_ReceiveData(USART1);
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USART_SendData(USART1, RxBuffer[RxCnt++]); /* send it when receive a byte */
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}
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} while((RxBuffer[RxCnt - 1] != '\r') && (RxCnt != TxSize));
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while(1)
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{
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}
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}
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