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55 lines
1.3 KiB
C
55 lines
1.3 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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SystemInit();
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SerialInit();
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printf("Hello World from USART0!\r\n");
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while(1==1)
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{
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while(!USART_INTStat(USART0, USART_IT_RX_RDY)) __NOP();
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USART_Write(USART0, USART_Read(USART0));
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}
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}
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void SerialInit(void)
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{
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USART_InitStructure USART_initStruct;
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PORT_Init(PORTA, PIN2, PORTA_PIN2_USART0_TX, 0);
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PORT_Init(PORTA, PIN3, PORTA_PIN3_USART0_RX, 1);
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USART_initStruct.Baudrate = 57600;
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USART_initStruct.DataBits = USART_DATA_8BIT;
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USART_initStruct.Parity = USART_PARITY_NONE;
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USART_initStruct.StopBits = USART_STOP_1BIT;
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USART_initStruct.RXReadyIEn = 0;
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USART_initStruct.TXReadyIEn = 0;
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USART_initStruct.TimeoutIEn = 0;
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USART_Init(USART0, &USART_initStruct);
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USART_Open(USART0);
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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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USART_Write(USART0, ch);
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while(!USART_INTStat(USART0, USART_IT_TX_EMPTY)) __NOP();
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return ch;
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}
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