gpio.c.svn-base

Spearhead2000 的 USB驱动程序

#include <gpio.h>
#include <uart.h>


void
gpioWrite(unsigned char gpio_num, unsigned char gpio_val)
{
//	*GPP_DIR &= ~(1 << gpio_num);
	switch(gpio_num)
	{
	case 0x0:
	   *GPP_DOUT0 = gpio_val;
	   break;
	case 0x1:
	   *GPP_DOUT1 = gpio_val;
	   break;
	case 0x2:
	   *GPP_DOUT2 = gpio_val;
	   break;
	case 0x3:
	   *GPP_DOUT3 = gpio_val;
	   break;
	case 0x4:
	   *GPP_DOUT4 = gpio_val;
	   break;
	case 0x5:
	   *GPP_DOUT5 = gpio_val;
	   break;
	}
}

unsigned char
gpioRead(unsigned char gpio_num)
{
        unsigned char gpio_val = 0;
	
//	*GPP_DIR |= (1 << gpio_num);
	gpio_val = (*GPP_DATA >> gpio_num);
	
	return(gpio_val);
}

static char in_buf = 0;
void gpio_test(void)
{
	static char value;
    	static char schedule;
	 
	schedule = 'r';
	
	while(schedule != 's')
	{
		*GPP_DIR = 0x0000000f;
		
//		UART_tx_vec("select i for Input(0 <-> 3) or o for Output(4 <-> 5) IOs",strlen("select i for Input(0 <-> 3) or o for Output(4 <-> 5) IOs"));
		UART_tx_vec("Test SPEARHEAD Leds",strlen("Test SPEARHEAD Leds"));
//	    	while (!(UART_getc(&value)));
		
/*		switch(value)
		{
		case 'o':			*/
			UART_tx_vec("select the value to send 0/1",strlen("select the value to send 0/1"));
	    		while (!(UART_getc(&value)));
			if (value == '0')UART_tx_vec("value is 0",strlen("value is 0")); 
			else UART_tx_vec("value is 1",strlen("value is 1"));
		
			UART_tx_vec("select the GPIO sender 4 <-> 5",strlen("select the GPIO sender 4 <-> 5"));
	    		while (!(UART_getc(&in_buf)));
		
			switch(in_buf)
			{
			case '4':
				UART_tx_vec("GPIO 4",strlen("GPIO 4"));
				if (value == '0') gpioWrite(4, 0); else gpioWrite(4, 1);
			break;
			case '5':
				UART_tx_vec("GPIO 5",strlen("GPIO 5"));
				if (value == '0') gpioWrite(5, 0); else gpioWrite(5, 1);
			break;
			default:
				UART_tx_vec("Wrong selection!",strlen("Wrong selection!"));
			break;
			}
/*		break;
			
		case 'i':
			UART_tx_vec("select the GPIO receiver 0 <-> 3",strlen("select the GPIO receiver 0 <-> 3"));
	    		while (!(UART_getc(&in_buf)));
		
			switch(in_buf)
			{
			case '0':
				UART_tx_vec("GPIO 0",strlen("GPIO 0"));
				UART_tx_vec("the received value is",strlen("the received value is"));
				if (gpioRead(0) == 0) UART_tx_vec("0",strlen("0")); else UART_tx_vec("1",strlen("1"));
			break;
			case '1':
				UART_tx_vec("GPIO 1",strlen("GPIO 1"));
				UART_tx_vec("the received value is",strlen("the received value is"));
				if (gpioRead(1) == 0) UART_tx_vec("0",strlen("0")); else UART_tx_vec("1",strlen("1"));
			break;
			case '2':
				UART_tx_vec("GPIO 2",strlen("GPIO 2"));
				UART_tx_vec("the received value is",strlen("the received value is"));
				if (gpioRead(2) == 0) UART_tx_vec("0",strlen("0")); else UART_tx_vec("1",strlen("1"));
			break;
			case '3':
				UART_tx_vec("GPIO 3",strlen("GPIO 3"));
				UART_tx_vec("the received value is",strlen("the received value is"));
				if (gpioRead(3) == 0) UART_tx_vec("0",strlen("0")); else UART_tx_vec("1",strlen("1"));
			break;
			default:
				UART_tx_vec("Wrong selection!",strlen("Wrong selection!"));
			break;
			}
		break;
		}		*/
		
	UART_tx_vec("press s to stop r to run",strlen("press s to stop r to run"));
	while (!(UART_getc(&schedule)));
	while (!(UART_putc(13)));
	while (!(UART_putc(10)));
	}
}