#include "SWM341.h"
#include <string.h>


/* 注意：使用 DMA 单步模式时，DMA 其他通道不工作
*/

char str_hi[] = "Hi from Synwit\n";


void SerialInit(void);

int main(void)
{	
	DMA_InitStructure DMA_initStruct;
	
	SystemInit();
	
	SerialInit();
	
	DMA_initStruct.Mode = DMA_MODE_CIRCLE;
	DMA_initStruct.Unit = DMA_UNIT_BYTE;
	DMA_initStruct.Count = strlen(str_hi);
	DMA_initStruct.SrcAddr = (uint32_t)str_hi;
	DMA_initStruct.SrcAddrInc = 1;
	DMA_initStruct.DstAddr = (uint32_t)&UART0->DATA;
	DMA_initStruct.DstAddrInc = 0;
	DMA_initStruct.Priority = DMA_PRI_LOW;
	DMA_initStruct.DoneIE = 0;
	
#if 1
	DMA_initStruct.Handshake = DMA_EXHS_TIMR0;
	
	TIMR_Init(TIMR0, TIMR_MODE_TIMER, CyclesPerUs, 500000, 0);	//每0.5秒钟触发DMA向UART0->DATA搬运一个字节
	TIMR_Start(TIMR0);
#else
	DMA_initStruct.Handshake = DMA_EXHS_TRIG0;
	
	PORT_Init(PORTN, PIN5, PORTN_PIN5_DMA_TRIG0, 1);	//PN5引脚上升沿触发DMA向UART0->DATA搬运一个字节
	PORTN->PULLU |= (1 << PIN5);
	
//	PORT_Init(PORTB, PIN0, PORTB_PIN0_DMA_TRIG1, 1);	//PB0引脚上升沿触发DMA向UART0->DATA搬运一个字节
//	PORTB->PULLU |= (1 << PIN0);
#endif

	DMA_CH_Init(DMA_CH0, &DMA_initStruct);
	DMA_CH_Open(DMA_CH0);
	
	while(1==1)
	{
	}
}


void SerialInit(void)
{
	UART_InitStructure UART_initStruct;
	
	PORT_Init(PORTM, PIN0, PORTM_PIN0_UART0_RX, 1);	//GPIOM.0配置为UART0输入引脚
	PORT_Init(PORTM, PIN1, PORTM_PIN1_UART0_TX, 0);	//GPIOM.1配置为UART0输出引脚
 	
 	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;
}