3.2.26 DIAG_TC

The DIAG_TC module is designed to verify the correct functionality of the Timer Controller (TC) through a set of C function calls.

The DIAG_TC software test API is mapped to the following safety mechanisms:

#define TC_HW_LOOP_CNTR             0xF0U
#define TC_MAX_CLOCKS_DIFF          0x5U

typedef enum 
{
    DISABLE = 0,
    TC0_OVF = 0x1B,
    TC1_OVF = 0x1E,
    TC2_OVF = 0x21,
    TCC0_OVF = 0x10,
    TCC1_OVF = 0x15,
    TCC2_OVF = 0x18,
}DIAG_DMA_TRIGGER_SRC;

typedef enum diag_tc_nums 
{
    DIAG_TC0_NUM = 0,
    DIAG_TC1_NUM = 1,
    DIAG_TC2_NUM = 2,
    DIAG_TC_MAX = 3,
}DIAG_TC_NUMBERS;

typedef enum diag_tc_periphs 
{
    DIAG_TC0_PERIPH = 1<<DIAG_TC0_NUM,
    DIAG_TC1_PERIPH = 1<<DIAG_TC1_NUM,
    DIAG_TC2_PERIPH = 1<<DIAG_TC2_NUM,
}DIAG_TC_PERIPHS;

typedef struct 
{
    bool ovf_set;
    bool ovf_clrd;
    bool cb;
}tc_int_status;

    
#define DIAG_TC_PERIPHS_CHECK_VALUE     ((uint32_t)DIAG_TC0_PERIPH | (uint32_t)DIAG_TC1_PERIPH | (uint32_t)DIAG_TC2_PERIPH)


    // *****************************************************************************
    // *****************************************************************************
    // Section: Data Types
    // *****************************************************************************
    // *****************************************************************************

// TC0<->TCC0 variables
extern uint32_t tc0_cntr, tc0_curr_cntr, tc0_prev_cntr, tcc0_cntr, tcc0_curr_cntr;
extern uint32_t tcc0_prev_cntr, tc0_tcc0_curr_diff, tc0_tcc0_prev_diff;
// TC0 interrupt status
extern tc_int_status tc0_ints;


// TC1<->TCC1 variables
extern uint32_t tc1_cntr, tc1_curr_cntr, tc1_prev_cntr, tcc1_cntr, tcc1_curr_cntr;
extern uint32_t tcc1_prev_cntr, tc1_tcc1_curr_diff, tc1_tcc1_prev_diff;

// TC1 interrupt status
extern tc_int_status tc1_ints;


// TC2<->TCC2 variables
extern uint32_t tc2_cntr, tc2_curr_cntr, tc2_prev_cntr, tcc2_cntr, tcc2_curr_cntr;
extern uint32_t tcc2_prev_cntr, tc2_tcc2_curr_diff, tc2_tcc2_prev_diff;

// TC2 interrupt status
extern tc_int_status tc2_ints;

Configuring the Diagnostic

DIAG_TC does not require additional configuration.

Configuring the System

Run-time Pre-requisites

DIAG_DIAG_TC_SFRWriteRead should be executed before DIAG_TC_SyncBusy, DIAG_TC_DMA and DIAG_TC_RedundantTimer

Using the Diagnostic

#include "definitions.h"

DIAG_TEST_STATUS DIAG_TC_SFRPost ( DIAG_TC_PERIPHS tc_periph )
{
    DIAG_TEST_STATUS result;
    
    result = DIAG_TC_SFRReset(tc_periph,NULL,0,false);
    if (result == DIAG_TEST_PASSED)
    {   
        result = DIAG_TC_SFRWriteRead(tc_periph,NULL,0,false);
    }
    return result; 
}


DIAG_TEST_STATUS DIAG_TC_Post ( DIAG_TC_PERIPHS tc_periph )
{
    DIAG_TEST_STATUS result;
    
    result = DIAG_TC_Enable( tc_periph );
    if( result == DIAG_TEST_PASSED )
    {
        result = DIAG_TC_Disable( tc_periph );
        if( result == DIAG_TEST_PASSED )
        {
            result = DIAG_TC_SyncBusy( tc_periph );
            if( result == DIAG_TEST_PASSED )
            {
                result = DIAG_TC_Interrupts( tc_periph );
                if( result == DIAG_TEST_PASSED )
                {
                    result = DIAG_TC_DMA( tc_periph, DMAC_CHANNEL_4 );  // must match DMA channel set up in MCC 
                    if( result == DIAG_TEST_PASSED )
                    {
                        result = DIAG_TC_RedundantTimer( tc_periph );
                    }
                }
            }
        }
    }
    return result; 
}