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stm32f4: Add support for watchdog 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-07-26 08:36:11 -04:00
parent 899b6726fa
commit 73709984b0
2 changed files with 26 additions and 1 deletions
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2
src/stm32f4/Makefile
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@ -11,7 +11,7 @@ CFLAGS += -Ilib/cmsis-core -Ilib/stm32f4/include
CFLAGS += -DSTM32F446xx
# Add source files
src-y += stm32f4/main.c stm32f4/clock.c stm32f4/gpio.c
src-y += stm32f4/main.c stm32f4/clock.c stm32f4/watchdog.c stm32f4/gpio.c
src-y += generic/crc16_ccitt.c generic/alloc.c
src-y += generic/armcm_irq.c generic/armcm_timer.c
src-y += ../lib/stm32f4/system_stm32f4xx.c

25
src/stm32f4/watchdog.c Normal file
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@ -0,0 +1,25 @@
// Watchdog handler on STM32F4
//
// Copyright (C) 2019 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "internal.h" // IWDG
#include "sched.h" // DECL_TASK
void
watchdog_reset(void)
{
IWDG->KR = 0xAAAA;
}
DECL_TASK(watchdog_reset);
void
watchdog_init(void)
{
IWDG->KR = 0x5555;
IWDG->PR = 0;
IWDG->RLR = 0x0FFF; // 512ms timeout
IWDG->KR = 0xCCCC;
}
DECL_INIT(watchdog_init);