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fixed and enabled software watchdog timer

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This commit is contained in:
Erich Styger
2017-12-24 12:06:46 +01:00
parent 1ac637af0f
commit 5581dd26b5
5 changed files with 31 additions and 20 deletions
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37
left/src/i2c_watchdog.c
View File

@@ -4,35 +4,46 @@
#include "test_led.h"
#include "init_peripherals.h"
//static uint32_t prevWatchdogCounter = 0;
uint32_t I2cWatchdog_RecoveryCounter;
volatile uint32_t I2cWatchdog_WatchCounter;
/* NOTE: Because of a bug in the ROM bootloader of the KL03Z, the watchdog timer is disabled and cannot be re-enabled.
* See https://community.nxp.com/thread/457893
* Therefore the hardware watchdog timer cannot be used without an extra way to enter bootloader or application mode.
*/
#define WATCH_ENABLE_WATCHDOG (1) /* additionally, un-comment InitI2cWatchdog() in init_peripherals.c */
#if WATCH_ENABLE_WATCHDOG
static uint32_t prevWatchdogCounter = 0;
#endif
static uint32_t I2cWatchdog_RecoveryCounter; /* counter for how many times we had to recover and restart */
void InitI2cWatchdog(void)
{
lptmr_config_t lptmrConfig;
LPTMR_GetDefaultConfig(&lptmrConfig);
LPTMR_Init(LPTMR0, &lptmrConfig);
LPTMR_SetTimerPeriod(LPTMR0, USEC_TO_COUNT(LPTMR_USEC_COUNT, LPTMR_SOURCE_CLOCK));
LPTMR_SetTimerPeriod(LPTMR0, USEC_TO_COUNT(LPTMR_USEC_COUNT, LPTMR_SOURCE_CLOCK)); /* set LPTM for a 100 ms period */
LPTMR_EnableInterrupts(LPTMR0, kLPTMR_TimerInterruptEnable);
EnableIRQ(LPTMR0_IRQn);
LPTMR_StartTimer(LPTMR0);
}
/*
#if WATCH_ENABLE_WATCHDOG
void I2C_WATCHDOG_LPTMR_HANDLER(void)
{
static volatile uint32_t I2cWatchdog_WatchCounter = 0; /* counter for timer */
TEST_LED_TOGGLE();
I2cWatchdog_WatchCounter++;
if (I2C_Watchdog == prevWatchdogCounter) { // Restart I2C if there hasn't been any interrupt during 100 ms
// NVIC_SystemReset();
I2cWatchdog_RecoveryCounter++;
I2C_SlaveDeinit(I2C_BUS_BASEADDR);
InitI2c();
if (I2cWatchdog_WatchCounter>1) { /* do not check within the first 100 ms, as I2C might not be running yet */
if (I2C_Watchdog == prevWatchdogCounter) { // Restart I2C if there hasn't been any interrupt during 100 ms. I2C_Watchdog gets incremented for every I2C transaction
// NVIC_SystemReset();
I2cWatchdog_RecoveryCounter++;
I2C_SlaveDeinit(I2C_BUS_BASEADDR);
InitI2c();
}
}
prevWatchdogCounter = I2C_Watchdog;
prevWatchdogCounter = I2C_Watchdog; /* remember previous counter */
LPTMR_ClearStatusFlags(LPTMR0, kLPTMR_TimerCompareFlag);
}
*/
#endif

2
left/src/init_peripherals.c
View File

@@ -85,7 +85,7 @@ void InitPeripherals(void)
InitLedDriver();
InitTestLed();
LedPwm_Init();
// InitI2cWatchdog();
DebugOverSpi_Init();
InitI2c();
InitI2cWatchdog();
}