C++ (Cpp) led_pwm_timer_get_period示例

示例#1

文件： drv_led_pwm.cpp 项目： lucasdemarchi/Firmware

int
led_pwm_servo_set(unsigned channel, uint8_t  cvalue)
{
	if (channel >= arraySize(led_pwm_channels)) {
		return -1;
	}

	unsigned timer = led_pwm_channels[channel].timer_index;

	/* test timer for validity */
	if ((led_pwm_timers[timer].base == 0) ||
	    (led_pwm_channels[channel].gpio_out == 0)) {
		return -1;
	}

	unsigned period = led_pwm_timer_get_period(timer);

#if defined(BOARD_LED_PWM_DRIVE_ACTIVE_LOW)
	unsigned value = period - (unsigned)cvalue * period / 255;
#else
	unsigned value = (unsigned)cvalue * period / 255;
#endif

	/* configure the channel */
	if (value > 0) {
		value--;
	}


	switch (led_pwm_channels[channel].timer_channel) {
	case 1:
		rCCR1(timer) = value;
		break;

	case 2:
		rCCR2(timer) = value;
		break;

	case 3:
		rCCR3(timer) = value;
		break;

	case 4:
		rCCR4(timer) = value;
		break;

	default:
		return -1;
	}

	return 0;
}

示例#2

文件： drv_led_pwm.cpp 项目： alsaibie/Firmware_Dolphin

unsigned
led_pwm_servo_get(unsigned channel)
{
	if (channel >= 3) {
		return 0;
	}

	unsigned timer = led_pwm_channels[channel].timer_index;
	servo_position_t value = 0;

	/* test timer for validity */
	if ((led_pwm_timers[timer].base == 0) ||
	    (led_pwm_channels[channel].timer_channel == 0)) {
		return 0;
	}

	/* configure the channel */
	switch (led_pwm_channels[channel].timer_channel) {
	case 1:
		value = rCCR1(timer);
		break;

	case 2:
		value = rCCR2(timer);
		break;

	case 3:
		value = rCCR3(timer);
		break;

	case 4:
		value = rCCR4(timer);
		break;
	}

	unsigned period = led_pwm_timer_get_period(timer);
	return ((value + 1) * 255 / period);
}