#include "SWM221.h"

void SerialInit(void);

int main(void)
{
	uint32_t chr;
	uint32_t err;
	
	SystemInit();
	
	SerialInit();
   	
	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);
	while(1==1)
	{
		while(UART_IsRXFIFOEmpty(UART0));
		
		err = UART_ReadByte(UART0, &chr);
		if(err == 0)
		{
			UART_WriteByte(UART0, chr);
		}
		else if(err == UART_ERR_PARITY)
		{
			printf("Parity error!\r\n");
			
			while(1) __NOP();
		}
	}
}

void SerialInit(void)
{
	UART_InitStructure UART_initStruct;
	
	PORT_Init(PORTA, PIN0, PORTA_PIN0_UART0_RX, 1);	//GPIOA.0配置为UART0 RXD
	PORT_Init(PORTA, PIN1, PORTA_PIN1_UART0_TX, 0);	//GPIOA.1配置为UART0 TXD
 	
 	UART_initStruct.Baudrate = 57600;
	UART_initStruct.DataBits = UART_DATA_8BIT;
	UART_initStruct.Parity = UART_PARITY_NONE;
	UART_initStruct.StopBits = UART_STOP_1BIT;
	UART_initStruct.RXThreshold = 3;
	UART_initStruct.RXThresholdIEn = 0;
	UART_initStruct.TXThreshold = 3;
	UART_initStruct.TXThresholdIEn = 0;
	UART_initStruct.TimeoutTime = 10;
	UART_initStruct.TimeoutIEn = 0;
 	UART_Init(UART0, &UART_initStruct);
	UART_Open(UART0);
}

/****************************************************************************************************************************************** 
* 函数名称: fputc()
* 功能说明: printf()使用此函数完成实际的串口打印动作
* 输    入: int ch		要打印的字符
*			FILE *f		文件句柄
* 输    出: 无
* 注意事项: 无
******************************************************************************************************************************************/
int fputc(int ch, FILE *f)
{
	UART_WriteByte(UART0, ch);
	
	while(UART_IsTXBusy(UART0));
 	
	return ch;
}