m54455evb_uart_test.c

来自「Freescale MCF5445evb 参考测试代码」· C语言 代码 · 共 118 行

/*!
 * \file    m54455evb_uart_test.c
 * \brief   Tests for serial ports on the M54455EVB (aka Jamaica)
 * \version $Revision: 1.1 $
 * \author  Michael Norman
 */

#include "common.h"
#include "uart.h"
#include "m54455evb_fat.h"

/*********************************************************************/	    

static UART_INFO uart_info = {
    TERM_PORT,          /* UART channel to initialize */
    UART_DATA_BITS_8,   /* Data bits per character */
    UART_STOP_BITS_1,   /* Stop bits */
    UART_PARTIY_NONE,   /* Parity Mode/Type */
    FALSE,              /* Use DMA flag */
    FALSE,              /* Interrupt/DMA Request on FIFO Full flag */
    FALSE,              /* Hardware Flow Control flag */
    NULL,               /* Source of the UART Clock */
    0,                  /* UART Clock Frequency in KHz */
    TERM_BAUD           /* Desired Baud Rate in bits/second */
};

/*********************************************************************/	    
int
uart0_test(void)
{
	int i;
	char ch;
	char tmp;

    uart_info.chan = 0;
    uart_info.clkfreq = clock_get_fbus();
    uart_init((UART_INFO *)&uart_info);

	/* Flush one character through */
	uart_putchar(0, 'Z');
	for (i = 0; i < 100000; i++)
		if (uart_getchar_present(0))
			break;
		
	if (i == 100000)
		return 1;
	
	uart_getchar(0);
	
	/* Test with 26 characters */
	for (ch = 'a'; ch <= 'z'; ch++)
	{
		uart_putchar(0, ch);
		
		/* Wait for char to be received */
		for (i = 0; i < 100000; i++)
			if (uart_getchar_present(0))
				break;

		/* Did we timeout? */
		if (i == 100000)
		    return 1;
		
		/* Did we receive the character properly? */
		tmp = uart_getchar(0);
		if (tmp != ch)
		    return 1;
	}

    return 0;	
}
/*********************************************************************/	    
int
uart1_test(void)
{
	int i;
	char ch;
	char tmp;

    uart_info.chan = 1;
    uart_info.clkfreq = clock_get_fbus();
    uart_init((UART_INFO *)&uart_info);

	/* Flush one character through */
	uart_putchar(1, 'Z');
	for (i = 0; i < 100000; i++)
		if (uart_getchar_present(1))
			break;
		
	if (i == 100000)
		return 1;
	
	uart_getchar(1);
	
	/* Test with 26 characters */
	for (ch = 'a'; ch <= 'z'; ch++)
	{
		uart_putchar(1, ch);
		
		/* Wait for char to be received */
		for (i = 0; i < 100000; i++)
			if (uart_getchar_present(1))
				break;

		/* Did we timeout? */
		if (i == 100000)
		    return 1;
		
		/* Did we receive the character properly? */
		tmp = uart_getchar(1);
		if (tmp != ch)
		    return 1;
	}

    return 0;	
}
/*********************************************************************/