pit_test.c

来自「Freescale MCF5445evb 参考测试代码」· C语言 代码 · 共 107 行

/*
 * File:		main.c
 * Purpose:		Main process
 *
 */

#include "common.h"
#include "pit.h"
#include "pit_test.h"

static void test_idle_state(void);
static void Pin_Toggle(void);

/********************************************************************/
int8 pit_testperiodicity (void)
{
    uint8 u8Char;
    uint8 i,j;
    uint32 au32FreqTests[] = { 500000, 100000, 10000, 1000, 100, 10, 1};
 
    TEST_PRINT_1 ("\t***********************\t\n");
    TEST_PRINT_1 ("Periodicity Test\n");
    TEST_PRINT_1 ("Connect DTIN0 to O-Scope and press a key when ready\n");

    WAIT_4_USER_INPUT();
    test_idle_state();
    
    
    for (i = 0; i < (sizeof(au32FreqTests)/sizeof(au32FreqTests[0])); 
         i++){
        for (j=0; j < 4; j++){
            if (PIT_SetFreq(au32FreqTests[i],j) == -1){
                TEST_PRINT_2("Error\n");
                 return -1;
            }
               
            PIT_EnableInts(Pin_Toggle, j);
            Pin_Toggle();
            PIT_Start(j);
            
            TEST_PRINT_2_P ("PIT #%d\t", j);
            TEST_PRINT_2_P ("Frequency is %dHz. OK?(y/n)", au32FreqTests[i]);
            u8Char = WAIT_4_USER_INPUT();
            PIT_Stop(j);
            TEST_PRINT_2 ("\n");
            if ((u8Char != 'Y') && (u8Char != 'y')){
                return -1;
            }
        }
    }
    return 0;
}
/********************************************************************/
int8 pit_testcountdown (void)
{
    uint8 u8Char;
    uint8 i,j;
    uint32 au32PeriodTests[] = {1, 5, 10};
 
    TEST_PRINT_1 ("\t***********************\t\n");
    TEST_PRINT_1 ("CountDown Test\n");
    TEST_PRINT_1 ("Connect DREQ0 to O-Scope and press a key when ready\n");

    WAIT_4_USER_INPUT();
    test_idle_state();
    
    for (i = 0; i < (sizeof(au32PeriodTests)/sizeof(au32PeriodTests[0])); 
         i++){
        for (j=0; j < 4; j++){
            Pin_Toggle();
            if (PIT_CountDown(au32PeriodTests[i],j) == -1){
                TEST_PRINT_2("Error\n");
                 return -1;
            }
               
            Pin_Toggle();
            
            TEST_PRINT_2_P ("PIT #%d\t", j);
            TEST_PRINT_2_P ("Frequency is %dms. OK?(y/n)", au32PeriodTests[i]);
            u8Char = WAIT_4_USER_INPUT();
            PIT_Stop(j);
            TEST_PRINT_2 ("\n");
            if ((u8Char != 'Y') && (u8Char != 'y')){
                return -1;
            }
        }
    }
    return 0;
}

/********************************************************************/
static void test_idle_state(void){
    (void) PITInit(0, 800, 0);
    (void) PITInit(0, 800, 1);
    (void) PITInit(0, 800, 2);
    (void) PITInit(0, 800, 3);
    MCF_GPIO_PAR_DMA = MCF_GPIO_PAR_DMA_DREQ0_GPIO;
    MCF_GPIO_PDDR_DMA = MCF_GPIO_PDDR_DMA_PDDR0;
    MCF_GPIO_PODR_DMA = 0;
}

/********************************************************************/
static void Pin_Toggle(void){
    MCF_GPIO_PODR_DMA ^= 0x01;
}
/********************************************************************/