watchdog  2.0.0.0
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Watchdog click

Watchdog Click is a compact add-on board that contains a simple countdown timer for a wide variety of applications. This board features the TPS3430, a standalone watchdog timer with a programmable watchdog window and programmable reset delay from Texas Instruments.

click Product page


Click library

  • Author : Stefan Ilic
  • Date : Sep 2021.
  • Type : GPIO type

Software Support

We provide a library for the Watchdog Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Watchdog Click driver.

Standard key functions :

Example key functions :

Example Description

This is an example that demonstrates the use of the Watchdog click board.

The demo application is composed of two sections :

Application Init

Initialization driver enables - GPIO, configure the watchdog window, enable watchdog, also write log.

void application_init ( void )
{
log_cfg_t log_cfg;
watchdog_cfg_t watchdog_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
watchdog_cfg_setup( &watchdog_cfg );
WATCHDOG_MAP_MIKROBUS( watchdog_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == watchdog_init( &watchdog, &watchdog_cfg ) ) {
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
watchdog_default_cfg ( &watchdog );
log_printf( &logger, "---------------------\r\n" );
log_printf( &logger, " Configure of the \r\n" );
log_printf( &logger, " watchdog window \r\n" );
Delay_ms( 1000 );
log_printf( &logger, "---------------------\r\n" );
log_printf( &logger, " Watchdog enabled \r\n" );
log_printf( &logger, "---------------------\r\n" );
Delay_ms( 1000 );
log_info( &logger, " Application Task " );
}

Application Task

In the first part of the example, we send pulses in a valid time window (Correct Operation). The second part of the example sends pulses outside the valid time window and then the watchdog detects a fault condition, display "Fault", performs the reset and turn on the LED ( WDT FLT ) on the Watchdog click board. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void )
{
log_printf( &logger, " Correct Operation \r\n" );
uint8_t n_cnt = 40;
while ( n_cnt > 0 ) {
watchdog_send_pulse( &watchdog, 1 );
Delay_ms( 50 );
n_cnt--;
}
log_printf( &logger, "---------------------\r\n" );
log_printf( &logger, " Fault \r\n" );
n_cnt = 8;
while ( n_cnt > 0 ) {
watchdog_send_pulse( &watchdog, 1 );
Delay_ms( 250 );
n_cnt--;
}
log_printf( &logger, "---------------------\r\n" );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.Watchdog

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.


watchdog_t
Watchdog Click context object.
Definition: watchdog.h:91
WATCHDOG_SETUP_TIME_MODE_2
#define WATCHDOG_SETUP_TIME_MODE_2
Definition: watchdog.h:60
watchdog_setup_time
void watchdog_setup_time(watchdog_t *ctx, uint8_t setup_time_mode)
Set the watchdog time function.
watchdog_default_cfg
err_t watchdog_default_cfg(watchdog_t *ctx)
Watchdog default configuration function.
application_task
void application_task(void)
Definition: main.c:77
watchdog_get_wdo
uint8_t watchdog_get_wdo(watchdog_t *ctx)
Get WDO ( INT ) pin state function.
watchdog_send_pulse
void watchdog_send_pulse(watchdog_t *ctx, uint16_t p_duration_ms)
Send pulse function.
watchdog_init
err_t watchdog_init(watchdog_t *ctx, watchdog_cfg_t *cfg)
Watchdog initialization function.
watchdog_cfg_t
Watchdog Click configuration object.
Definition: watchdog.h:104
watchdog_cfg_setup
void watchdog_cfg_setup(watchdog_cfg_t *cfg)
Watchdog configuration object setup function.
application_init
void application_init(void)
Definition: main.c:34
watchdog_set_set0
void watchdog_set_set0(watchdog_t *ctx, uint8_t set0_state)
Set S0 ( RST ) pin state function.
WATCHDOG_MAP_MIKROBUS
#define WATCHDOG_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: watchdog.h:78