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[feat] add watchdog

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This commit is contained in:
zhji 2025-06-01 16:18:31 +08:00
parent ea852b4dd7
commit 6afed2f349
5 changed files with 57 additions and 1 deletions
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1
driver/CMakeLists.txt
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@ -12,6 +12,7 @@ src/timer.c
src/dma.c
src/uart.c
src/usb.c
src/watchdog.c
)
set(TARGET driver)

29
driver/inc/reg/watchdog_reg.h Normal file
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@ -0,0 +1,29 @@
#ifndef __HARDWARE_WATCHDOG_REG_H__
#define __HARDWARE_WATCHDOG_REG_H__
#define WATCHDOG_TICK_CYCLES_POS (0U)
#define WATCHDOG_TICK_CYCLES_MASK (0x1FF << WATCHDOG_TICK_CYCLES_POS)
#define WATCHDOG_TICK_ENABLE (1 << 9U)
#define WATCHDOG_TICK_RUNNING (1 << 10U)
#define WATCHDOG_TICK_COUNT_POS (11U)
#define WATCHDOG_TICK_COUNT_MASK (0x1FF << WATCHDOG_TICK_COUNT_POS)
typedef struct {
io_rw_32 ctrl;
io_wo_32 load;
io_ro_32 reason;
io_rw_32 scratch[8];
io_rw_32 tick;
} watchdog_hw_t;
#define watchdog_hw ((watchdog_hw_t *const)WATCHDOG_BASE)
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
}
#endif
#endif /* __HARDWARE_WATCHDOG_REG_H__ */

19
driver/inc/watchdog.h Normal file
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@ -0,0 +1,19 @@
#ifndef __HARDWARE_WATCHDOG_H__
#define __HARDWARE_WATCHDOG_H__
#include "reg.h"
#include "watchdog_reg.h"
#ifdef __cplusplus
extern "C" {
#endif
void watchdog_start_tick(uint16_t cycles);
#ifdef __cplusplus
}
#endif
#endif /* __HARDWARE_WATCHDOG_H__ */

6
driver/src/watchdog.c Normal file
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@ -0,0 +1,6 @@
#include "watchdog.h"
void watchdog_start_tick(uint16_t cycles)
{
watchdog_hw->tick = (cycles << WATCHDOG_TICK_CYCLES_POS) | WATCHDOG_TICK_ENABLE;
}

3
example/boot2/main.c
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@ -56,6 +56,7 @@ void __attribute__((section(".text.boot2_pre"))) boot2_copy_self(void)
#include "clock.h"
#include "uart.h"
#include "flash.h"
#include "watchdog.h"
#include "timer.h"
#include "stdio.h"
@ -224,7 +225,7 @@ int main(void)
gpio_init(0, GPIO_FUNC_UART | GPIO_PULL_UP | GPIO_DRIVE_4MA); /* UART_TX pin */
gpio_init(1, GPIO_FUNC_UART | GPIO_PULL_UP | GPIO_SCHMITT | GPIO_PAD_IE | GPIO_PAD_OD); /* UART_RX pin */
uart_init(UART_ID_0, &uart_cfg);
*(volatile uint32_t *)(WATCHDOG_BASE + 0x2C) = ((1 << 9) | (12 << 0));
watchdog_start_tick(12); /* 12MHz / 12 = 1MHz, as 1us */
timer_start();
gpio_init(2, GPIO_FUNC_NULL | GPIO_PULL_DOWN | GPIO_SCHMITT | GPIO_PAD_IE | GPIO_PAD_OD); /* boot pin */