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

#include "ff.h"

FATFS fatfs;

char str[] __attribute__((aligned(4))) = 
			"Hi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\n"
			"Hi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\n"
			"Hi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\n"
			"Hi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\n"
			"Hi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\n"
			"Hi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\n"
			"Hi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\nHi from Synwit!\n";
char buf[1024] __attribute__((aligned(4))) = {0};

void SerialInit(void);

int main(void)
{
	uint32_t len;
	FRESULT  res;
	FIL filw, filr;
	
	SystemInit();
	
	SerialInit();
	
	for(int i = 0; i < SystemCoreClock/10; i++) __NOP();	// 等待 SD 卡完成初始化
	
	res = f_mount(&fatfs, "sd:", 1);
	if(res != FR_OK)
	{
		printf("sdcard init fail!\r\n");
		goto loop_forever;
	}
	
    res = f_open(&filw, "sd:test.txt", FA_CREATE_ALWAYS | FA_WRITE);
	if(res != FR_OK)
	{
		printf("create file fail!\r\n");
		goto loop_forever;
	}
	
	res = f_write(&filw, str, strlen(str), &len);
	if(res != FR_OK)
	{
		printf("write file fail!\r\n");
		goto loop_forever;
	}
	
	f_close(&filw);
	
	res = f_open(&filr, "sd:test.txt", FA_OPEN_EXISTING | FA_READ);
	if(res != FR_OK)
	{
		printf("open file fail!\r\n");
		goto loop_forever;
	}
	
	res = f_read(&filr, buf, sizeof(buf)-1, &len);
	if(res != FR_OK)
	{
		printf("read file fial!\r\n");
		goto loop_forever;
	}
	
	f_close(&filr);
	
	if(strcmp(buf, str) == 0)
	{
		printf("read string == write string\r\n");
	}
	else
	{
		printf("read string != write string\r\n");
	}
		
loop_forever:
	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;
}