コード例 #1
0
void pwmout_init(pwmout_t* obj, PinName pin) 
{
    uint32_t peripheral;
    u32 pwm_idx;
    u32 pin_sel;

    
    // Get the peripheral name from the pin and assign it to the object
    peripheral = pinmap_peripheral(pin, PinMap_PWM);

    if ( peripheral == NC ) {
        return;
    }

    pwm_idx = RTL_GET_PERI_IDX(peripheral);
    pin_sel = RTL_GET_PERI_SEL(peripheral);

    obj->pwm_idx = pwm_idx;
    obj->pin_sel = pin_sel;
    obj->period = 0;
    obj->pulse = 0;
    HAL_Pwm_Init(pwm_idx, pin_sel);
	obj->period = 20000;
    HAL_Pwm_SetDuty(obj->pwm_idx, obj->period, obj->pulse);
    HAL_Pwm_Enable(pwm_idx);
}
コード例 #2
0
ファイル: pwmout_api.c プロジェクト: Archcady/mbed-os
void pwmout_write(pwmout_t* obj, float value) 
{
    if (value < (float)0.0) {
        value = 0.0;
    } else if (value > (float)1.0) {
        value = 1.0;
    }

    obj->pulse = (uint32_t)((float)obj->period * value);
    HAL_Pwm_SetDuty(&obj->pwm_hal_adp, obj->period, obj->pulse);
}
コード例 #3
0
// Right now, PWM output only works on the pins with
// hardware support.  These are defined in the appropriate
// pins_*.c file.  For the rest of the pins, we default
// to digital output.
void analogWrite(uint32_t ulPin, uint32_t ulValue) 
{

	pwmout_t *pObj;

	if ( ulPin < 0 || ulPin > 13 ) return;

	/* Handle */
	if ( g_APinDescription[ulPin].ulPinType != PIO_PWM )
	{
		pwmout_init(&pwm_pins[ulPin], g_APinDescription[ulPin].pinname);
		g_APinDescription[ulPin].ulPinType = PIO_PWM;
	}

	pObj = &pwm_pins[ulPin];
    pObj->pulse = pObj->period * ulValue / 256;
    HAL_Pwm_SetDuty(pObj->pwm_idx, pObj->period, pObj->pulse);


}