wdt.c

Go to the documentation of this file.

/*
 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
 */

#include "wdt.h"


#ifdef __cplusplus
extern "C" {
#endif


#define WDT_KEY_PASSWORD  0xA5000000
#define WDT_SLCK_DIV      128
#define WDT_MAX_VALUE     4095

uint32_t wdt_get_timeout_value(uint32_t ul_us, uint32_t ul_sclk)
{
        uint32_t max, min;

        min = WDT_SLCK_DIV * 1000000 / ul_sclk;
        max = min * WDT_MAX_VALUE;

        if ((ul_us < min) || (ul_us > max)) {
                return WDT_INVALID_ARGUMENT;
        }

        return WDT_MR_WDV(ul_us / min);
}

void wdt_init(Wdt *p_wdt, uint32_t ul_mode, uint16_t us_counter,
                uint16_t us_delta)
{
        p_wdt->WDT_MR = ul_mode |
                        WDT_MR_WDV(us_counter) | WDT_MR_WDD(us_delta);
}

void wdt_disable(Wdt *p_wdt)
{
        p_wdt->WDT_MR = WDT_MR_WDDIS;

}

void wdt_restart(Wdt *p_wdt)
{
        if (p_wdt == WDT) {
                p_wdt->WDT_CR = WDT_KEY_PASSWORD | WDT_CR_WDRSTT;
        }
#if (SAM4C || SAM4CM || SAM4CP)
        else {
                p_wdt->WDT_CR = RSWDT_CR_KEY(0xC4u) | RSWDT_CR_WDRSTT;
        }
#endif
}

uint32_t wdt_get_status(Wdt *p_wdt)
{
        return p_wdt->WDT_SR;
}

uint32_t wdt_get_us_timeout_period(Wdt *p_wdt, uint32_t ul_sclk)
{
        return WDT_MR_WDV(p_wdt->WDT_MR) * WDT_SLCK_DIV / ul_sclk * 1000000;
}



#ifdef __cplusplus
}
#endif

---

inertial_sense_ros
Author(s):
autogenerated on Sat Sep 19 2020 03:19:05