view target-utils/flash-boot-test/watchdog.c @ 495:06ad5e30e8d0

target-utils: wait_ARM_cycles() changed to 4 cycles per loop
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 25 May 2019 18:51:19 +0000
parents 3d7b546c710c
children
line wrap: on
line source

#include <sys/types.h>
#include "types.h"

void
cmd_wd()
{
	/* stop/disable the watchdog timer */
	*(volatile u16 *)0xFFFFF804 = 0xF5;
	*(volatile u16 *)0xFFFFF804 = 0xA0;
}

void
cmd_we()
{
	/* watchdog enable */
	*(volatile u16 *)0xFFFFF804 = 0x8000;
}

void
cmd_wr()
{
	/* read and display watchdog downcount register */
	printf("%04X\n", *(volatile u16 *)0xFFFFF802);
}

void
cmd_ww(argbulk)
	char *argbulk;
{
	/* single or double write to WATCHDOG_TIM_MODE */
	char *argv[3];
	u_long w1, w2;

	if (parse_args(argbulk, 1, 2, argv, 0) < 0)
		return;
	if (parse_hexarg(argv[0], 4, &w1) < 0) {
		printf("ERROR: arg1 must be a valid 16-bit hex value\n");
		return;
	}
	if (argv[1] && parse_hexarg(argv[1], 4, &w2) < 0) {
		printf("ERROR: arg2 must be a valid 16-bit hex value\n");
		return;
	}
	/* do it */
	*(volatile u16 *)0xFFFFF804 = w1;
	if (argv[1])
		*(volatile u16 *)0xFFFFF804 = w2;
}