view target-utils/c139explore/backlight.c @ 407:19e5a3e2f9c0

fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents 5d9d95530256
children
line wrap: on
line source

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

#define	GPIO_OUT_REG		(*(volatile u16 *) 0xfffe4802)
#define	BACKLIGHT_GPIO_MASK	0x0002

#define	AUXLED_KPBL_OFF	0x000
#define	AUXLED_KPBL_ON	0x002

void
cmd_dbl(argbulk)
	char *argbulk;
{
	char *argv[2];

	if (parse_args(argbulk, 1, 1, argv, 0) < 0)
		return;
	if (!strcmp(argv[0], "on"))
		GPIO_OUT_REG |= BACKLIGHT_GPIO_MASK;
	else if (!strcmp(argv[0], "off"))
		GPIO_OUT_REG &= ~BACKLIGHT_GPIO_MASK;
	else
		printf("ERROR: \"on\" or \"off\" argument expected\n");
}

void
cmd_kpbl(argbulk)
	char *argbulk;
{
	char *argv[2];

	if (parse_args(argbulk, 1, 1, argv, 0) < 0)
		return;
	if (!strcmp(argv[0], "on"))
		abb_reg_write(AUXLED, AUXLED_KPBL_ON);
	else if (!strcmp(argv[0], "off"))
		abb_reg_write(AUXLED, AUXLED_KPBL_OFF);
	else
		printf("ERROR: \"on\" or \"off\" argument expected\n");
}