ATA6824_defs.c File Reference

#include "config.h"
#include "ATA6824_defs.h"
#include "Timer0_PWM.h"

Include dependency graph for ATA6824_defs.c:

Go to the source code of this file.

Functions
void	refresh_ATA6824_watchdog (void)
	refresh_watchdog Refreshes the ATA6824 external watchdog according to its required refresh period (fixed by an external resistor).
void	Diag_inputs_ISR_init (void)
	Diag_inputs_ISR_init set-up Pin change interrupts on diagnotics inputs Enable PCINT14 to 8 mask Configure DG1, DG2 and DG3 resp. PCINT10, PCINT11 and PCINT12 to generate interrupts on both rising or falling edges.
Variables
ATA6824_diag_mgt_t	ATA6824_diag_mgt

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Function Documentation

void refresh_ATA6824_watchdog

(

void

)

refresh_watchdog Refreshes the ATA6824 external watchdog according to its required refresh period (fixed by an external resistor).

This routine uses the software time base to generate rising edges on the WD trigger pin of the ATA6824 during the open window t2 (see datasheet).

Warning:

: changing Timer 0 overflow period will affect the time base and so the watchdog refresh period.

Definition at line 56 of file ATA6824_defs.c.

References SoftTimer_t::count, ONE_SECOND, time_count_1s, and WD_TIME_TRIG.

Referenced by main().

{
  static unsigned int last_count=0;     // remembers the last WD trigger instant
  signed int dif;                   
  
  // Compute elapsed time since the last WD trigger has occured
  dif = last_count - (U16)(time_count_1s.count);
  
  if (dif<0) 
    {dif = dif + ONE_SECOND; };         // take care of time count overflows
  
  // Check the elapsed time since the last WD trigger
  if (dif > WD_TIME_TRIG)
  {
    // Toggle the Watchdog trigger pin when half of the period has elapsed
    TOGGLE_WD_TRIG();                     
    last_count = time_count_1s.count;   // remember the last WD trigger instant
  }
}

void Diag_inputs_ISR_init

(

void

)

Diag_inputs_ISR_init set-up Pin change interrupts on diagnotics inputs

• Enable PCINT14 to 8 mask
• Configure DG1, DG2 and DG3 resp. PCINT10, PCINT11 and PCINT12 to generate interrupts on both rising or falling edges.

Definition at line 83 of file ATA6824_defs.c.

Referenced by main().

{
    /*init PCINT1  Pin change interrupt initialisation */
    // PCINT14...8 interrupt pins enabled
  PCICR |= 1 << PCIE1;   
    // PCINT10/11/12 interrupt pin are enabled    
  PCMSK1 |= (1 << PCINT12) | (1 << PCINT11) | (1 << PCINT10);  
}

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Variable Documentation

ATA6824_diag_mgt_t ATA6824_diag_mgt

Definition at line 43 of file ATA6824_defs.c.

Referenced by display_defaults().

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