changshi.c

uart 试验 点燃led 2440 面向初学者

#define GPGCON (*(volatile unsigned*)0x56000050)
#define GPGUP (*(volatile unsigned*)0x56000058)
#define GPGDAT (*(volatile unsigned*)0x56000054)
#define UTRSTAT0 (*(volatile unsigned *)0x50000010)
#define UERSTAT0 (*(volatile unsigned *)0x50000014)
#define UTXH0 (*(volatile unsigned *)0x50000023)
#define URXH0 (*(volatile unsigned *)0x50000027)
//void uart_init();

void uartsent(char *c );
	
unsigned char uart_get();

int Main(void)
{
	//char key =' ';
	uartsent("uart communication sucess!\r\n");
	
	while(1)
	{
		GPGCON=0x5500;
 		GPGDAT=0x0f;
	}
	
	return 0;
	
}

void uartsent(char *c)
{
	for (;*c!='\0';c++)
	{
		while(!(UTRSTAT0&0x04));
		UTXH0 = *c;
	}
}
/**void uart_init(void)
{
	ULCON0=0x03;
	UCON0=0x05;
	UFCON0=0x00;
	UMCON0=0x00;
	UBRDIV0=27;
	GPHCON |=0xa0;
	GPHUP=0x0c;
}*/
unsigned char uart_get(void)
{
	while(!(UTRSTAT0&0x1));
	return URXH0;
}