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70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
#include "SWM221.h"
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void SerialInit(void);
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int main(void)
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{
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uint32_t chr;
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uint32_t err;
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SystemInit();
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SerialInit();
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printf("Hello World from %c%c%c%c%c%c%c%c%c%c%c%c%c!\n",83,121,110,119,105,116,46,99,111,109,46,99,110);
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while(1==1)
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{
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while(UART_IsRXFIFOEmpty(UART0));
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err = UART_ReadByte(UART0, &chr);
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if(err == 0)
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{
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UART_WriteByte(UART0, chr);
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}
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else if(err == UART_ERR_PARITY)
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{
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printf("Parity error!\r\n");
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while(1) __NOP();
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}
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}
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}
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void SerialInit(void)
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{
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UART_InitStructure UART_initStruct;
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PORT_Init(PORTA, PIN0, PORTA_PIN0_UART0_RX, 1); //GPIOA.0配置为UART0 RXD
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PORT_Init(PORTA, PIN1, PORTA_PIN1_UART0_TX, 0); //GPIOA.1配置为UART0 TXD
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UART_initStruct.Baudrate = 57600;
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UART_initStruct.DataBits = UART_DATA_8BIT;
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UART_initStruct.Parity = UART_PARITY_NONE;
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UART_initStruct.StopBits = UART_STOP_1BIT;
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UART_initStruct.RXThreshold = 3;
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UART_initStruct.RXThresholdIEn = 0;
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UART_initStruct.TXThreshold = 3;
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UART_initStruct.TXThresholdIEn = 0;
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UART_initStruct.TimeoutTime = 10;
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UART_initStruct.TimeoutIEn = 0;
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UART_Init(UART0, &UART_initStruct);
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UART_Open(UART0);
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}
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/******************************************************************************************************************************************
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* 函数名称: fputc()
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* 功能说明: printf()使用此函数完成实际的串口打印动作
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* 输 入: int ch 要打印的字符
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* FILE *f 文件句柄
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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int fputc(int ch, FILE *f)
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{
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UART_WriteByte(UART0, ch);
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while(UART_IsTXBusy(UART0));
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return ch;
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}
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