lh7a400_dcdc_driver.c

sharp触摸屏测试代码

    /*
     *  get PMPFREQ register contents, mask-out desired field,
     *   then shift into LSB position as needed.
     */
    switch (power)
    {
        case EXTERN_POWER:     // get PWM1 LOW field
            ret = (DCDC->pmpfreq & PWM1_LOW_DATA_MASK)
                    >> PWM1_LOW_DATA_POSITION;  // into LSB
            break;

        default:
        case BATTERY_POWER:    // get PWM1 HIGH field
            ret = (DCDC->pmpfreq & PWM1_HIGH_DATA_MASK)
                    >> PWM1_HIGH_DATA_POSITION;  // into LSB
            break;
    }

    return ret;
}


/***********************************************************************
 *
 * Function: LH7A400_pwm0_disable
 *
 * Purpose:
 *  Disables output on the PWM0 channel of the LH7A400.
 *
 * Processing:
 *   - save old PWM1 duty-cycle data
 *   - set ALL PWM0 duty cycles to ZERO
 *   - write new Duty-Cycle Register data
 *
 * Parameters:  None.
 *
 * Outputs: None
 *
 * Returns: Nothing
 *
 * Notes:
 *    This is a "destructive" function in that it sets the
 *     duty-cycle to ZERO for both the LOW and HIGH register fields.
 *     This function disables the entire PWM0 channel.
 *    To just turn off one part of the channel,
 *     use  pwm0_set_dutycycle()  to set one POWER_TYPE field to ZERO.
 *
 *  This function is "destructive":
 *    ALL previous PWM0 duty-cycle values are lost
 *     ( All PWM1 values and PWM0-prescaler values are saved )
 *
 **********************************************************************/
void LH7A400_pwm0_disable(void)
{
    UNS_32  old_pmpcon1_data;

    /* save previous register contents .. clear out PWM0 data */
    old_pmpcon1_data  = DCDC->pmpcon  & ~PWM0_ALL_DATA_MASK;

    /* set disabling ZERO to PWM0 HIGH & LOW fields */
    DCDC->pmpcon = old_pmpcon1_data     |
                   PMPCON_DRV0_DTYHI(0) |
                   PMPCON_DRV0_DTYLO(0);
}


/***********************************************************************
 *
 * Function: LH7A400_pwm1_disable
 *
 * Purpose:
 *  Disables output on the PWM1 channel of the LH7A400.
 *
 * Processing:
 *   - save old PWM0 duty-cycle data
 *   - set ALL PWM1 duty cycles to ZERO
 *   - write new Duty-Cycle Register data
 *
 * Parameters:  None.
 *
 * Outputs: None
 *
 * Returns: Nothing
 *
 * Notes:
 *    This is a "destructive" function in that it sets the
 *     duty-cycle to ZERO for both the LOW and HIGH register fields.
 *     This function disables the entire PWM1 channel.
 *    To just turn off one part of the channel,
 *     use  pwm1_set_dutycycle()  to set one POWER_TYPE field to ZERO.
 *
 *  This function is "destructive":
 *    ALL previous PWM1 duty-cycle values are lost
 *     ( All PWM0 values and PWM1-prescaler values are saved )
 *
 **********************************************************************/
void LH7A400_pwm1_disable(void)
{
    UNS_32  old_pmpcon0_data;

    /* save previous register contents .. clear out PWM1 data */
    old_pmpcon0_data  = DCDC->pmpcon  & ~PWM1_ALL_DATA_MASK;

    /* set disabling ZERO to PWM0 HIGH & LOW fields */
    DCDC->pmpcon = old_pmpcon0_data     |
                   PMPCON_DRV1_DTYHI(0) |
                   PMPCON_DRV1_DTYLO(0);
}


/***********************************************************************
 *
 * Function:  LH7A400_pwm0_increase_duty_cycle
 *
 * Purpose:
 *     increase PWM0 duty cycle by ONE for selected power-type
 *
 * Processing:
 *   - read current PWM0 Duty-Cycles
 *   - increase selected power-type field by 1
 *   - write back out
 *
 * Parameters:
 *   power     - Type of power connected to the LH7A400.
 *               This actually designates which register fields
 *                to access:
 *                  EXTERN_POWER or BATTERY_POWER or ALL_POWER_TYPES
 *                             {LH7A400_dcdc_driver.h}
 *
 *  Values:
 *    UNS_8 power  -  EXTERN_POWER | BATTERY_POWER | ALL_POWER_TYPES
 *
 *
 * Outputs:    None
 *
 * Returns:    None
 *       success:  _NO_ERROR
 *       failure:  _ERROR    (checks if already at MAX)
 *
 * Notes:
 *       For power == ALL_POWER_TYPES,  _ERROR return does not specify
 *        which one power-ype or both were already at MAX.
 *
 *
 **********************************************************************/
INT_8 LH7A400_pwm0_increase_duty_cycle (UNS_8 power)
{
    INT_8   ret;

    ret = _NO_ERROR;

    switch (power)
    {
        case EXTERN_POWER:     // inc. PWM0 LOW field
            if ((DCDC->pmpcon & PWM0_LOW_DATA_MASK) <
                (MAX_DUTYCYCLE_VALUE << PWM0_LOW_DATA_POSITION)
               ) // inc. if current field value less-than MAX allowed
            {
                DCDC->pmpcon +=  PWM0_LOW_DATA_SELECT;
            }
            else
            {    // if not, can't increment.
                ret = _ERROR;
            }
            break;

        case BATTERY_POWER:    // inc. PWM0 HIGH field
            if ((DCDC->pmpcon & PWM0_HIGH_DATA_MASK) <
                (MAX_DUTYCYCLE_VALUE << PWM0_HIGH_DATA_POSITION)
               ) // inc. if current field value less-than MAX allowed
            {
                DCDC->pmpcon +=  PWM0_HIGH_DATA_SELECT;
            }
            else
            {    // if not, can't increment.
                ret = _ERROR;
            }
            break;

        case ALL_POWER_TYPES:  // inc. PWM0 LOW & HIGH fields
            if ((DCDC->pmpcon & PWM0_LOW_DATA_MASK) <
                (MAX_DUTYCYCLE_VALUE << PWM0_LOW_DATA_POSITION)
               ) // inc. if current field value less-than MAX allowed
            {
                DCDC->pmpcon +=  PWM0_LOW_DATA_SELECT;
            }
            else
            {    // if not, can't increment.
                ret = _ERROR;
            }
            if ((DCDC->pmpcon & PWM0_HIGH_DATA_MASK) <
                (MAX_DUTYCYCLE_VALUE << PWM0_HIGH_DATA_POSITION)
               ) // inc. if current field value less-than MAX allowed
            {
                DCDC->pmpcon +=  PWM0_HIGH_DATA_SELECT;
            }
            else
            {    // if not, can't increment.
                ret = _ERROR;
            }
            break;

        default:
            break;
    }

    return ret;
}


/***********************************************************************
 *
 * Function:  LH7A400_pwm0_decrease_duty_cycle
 *
 * Purpose:
 *     decrease PWM0 duty cycle by ONE for selected power-type
 *
 * Processing:
 *   - read current PWM0 Duty-Cycles
 *   - decrease selected power-type field by 1
 *   - write back out
 *
 * Parameters:
 *   power     - Type of power connected to the LH7A400.
 *               This actually designates which register fields
 *                to access:
 *                  EXTERN_POWER or BATTERY_POWER or ALL_POWER_TYPES
 *                             {LH7A400_dcdc_driver.h}
 *
 *  Values:
 *    UNS_8 power  -  EXTERN_POWER | BATTERY_POWER | ALL_POWER_TYPES
 *
 *
 * Outputs:    None
 *
 * Returns:    None
 *       success:  _NO_ERROR
 *       failure:  _ERROR    (checks if already at MAX)
 *
 * Notes:
 *       For power == ALL_POWER_TYPES,  _ERROR return does not specify
 *        which one power-ype or both were already at MAX.
 *
 *
 **********************************************************************/
INT_8 LH7A400_pwm0_decrease_duty_cycle (UNS_8 power)
{
    INT_8   ret;

    ret = _NO_ERROR;

    switch (power)
    {
        case EXTERN_POWER:     // dec. PWM0 LOW field
            if ((DCDC->pmpcon & PWM0_LOW_DATA_MASK) >
                (MIN_DUTYCYCLE_VALUE << PWM0_LOW_DATA_POSITION)
               ) // dec. if current field value greater-than MIN allowed
            {
                DCDC->pmpcon -=  PWM0_LOW_DATA_SELECT;
            }
            else
            {    // if not, can't decrement.
                ret = _ERROR;
            }
            break;

        case BATTERY_POWER:    // dec. PWM0 HIGH field
            if ((DCDC->pmpcon & PWM0_HIGH_DATA_MASK) >
                (MIN_DUTYCYCLE_VALUE << PWM0_HIGH_DATA_POSITION)
               ) // dec. if current field value greater-than MIN allowed
            {
                DCDC->pmpcon -=  PWM0_HIGH_DATA_SELECT;
            }
            else
            {    // if not, can't decrement.
                ret = _ERROR;
            }
            break;

        case ALL_POWER_TYPES:  // dec. PWM0 LOW & HIGH fields
            if ((DCDC->pmpcon & PWM0_LOW_DATA_MASK) >
                (MIN_DUTYCYCLE_VALUE << PWM0_LOW_DATA_POSITION)
               ) // dec. if current field value greater-than MIN allowed
            {
                DCDC->pmpcon -=  PWM0_LOW_DATA_SELECT;
            }
            else
            {    // if not, can't decrement.
                ret = _ERROR;
            }
            if ((DCDC->pmpcon & PWM0_HIGH_DATA_MASK) >
                (MIN_DUTYCYCLE_VALUE << PWM0_HIGH_DATA_POSITION)
               ) // dec. if current field value greater-than MIN allowed
            {
                DCDC->pmpcon -=  PWM0_HIGH_DATA_SELECT;
            }
            else
            {    // if not, can't decrement.
                ret = _ERROR;
            }
            break;

        default:
            break;
    }

    return ret;
}


/***********************************************************************
 *
 * Function:  LH7A400_pwm1_increase_duty_cycle
 *
 * Purpose:
 *     increase PWM1 duty cycle by ONE for selected power-type
 *
 * Processing:
 *   - read current PWM1 Duty-Cycles
 *   - increase selected power-type field by 1
 *   - write back out
 *
 * Parameters:
 *   power     - Type of power connected to the LH7A400.
 *               This actually designates which register fields
 *                to access:
 *                  EXTERN_POWER or BATTERY_POWER or ALL_POWER_TYPES
 *                             {LH7A400_dcdc_driver.h}
 *
 *  Values:
 *    UNS_8 power  -  EXTERN_POWER | BATTERY_POWER | ALL_POWER_TYPES
 *
 *
 * Outputs:    None
 *
 * Returns:    None
 *       success:  _NO_ERROR
 *       failure:  _ERROR    (checks if already at MAX)
 *
 * Notes:
 *       For power == ALL_POWER_TYPES,  _ERROR return does not specify
 *        which one power-ype or both were already at MAX.
 *
 *
 **********************************************************************/
INT_8 LH7A400_pwm1_increase_duty_cycle (UNS_8 power)
{
    INT_8   ret;

    ret = _NO_ERROR;

    switch (power)
    {
        case EXTERN_POWER:     // inc. PWM1 LOW field
            if ((DCDC->pmpcon & PWM1_LOW_DATA_MASK) <
                (MAX_DUTYCYCLE_VALUE << PWM1_LOW_DATA_POSITION)
               ) // inc. if current field value less-than MAX allowed
            {
                DCDC->pmpcon +=  PWM1_LOW_DATA_SELECT;
            }
            else
            {    // if not, can't increment.
                ret = _ERROR;
            }
            break;

        case BATTERY_POWER:    // inc. PWM1 HIGH field
            if ((DCDC->pmpcon & PWM1_HIGH_DATA_MASK) <
                (MAX_DUTYCYCLE_VALUE << PWM1_HIGH_DATA_POSITION)
               ) // inc. if current field value less-than MAX allowed
            {
                DCDC->pmpcon +=  PWM1_HIGH_DATA_SELECT;
            }
            else
            {    // if not, can't increment.
                ret = _ERROR;
            }
            break;

        case ALL_POWER_TYPES:  // inc. PWM1 LOW & HIGH fields
            if ((DCDC->pmpcon & PWM1_LOW_DATA_MASK) <
                (MAX_DUTYCYCLE_VALUE << PWM1_LOW_DATA_POSITION)
               ) // inc. if current field value less-than MAX allowed
            {
                DCDC->pmpcon +=  PWM1_LOW_DATA_SELECT;
            }
            else
            {    // if not, can't increment.
                ret = _ERROR;
            }
            if ((DCDC->pmpcon & PWM1_HIGH_DATA_MASK) <
                (MAX_DUTYCYCLE_VALUE << PWM1_HIGH_DATA_POSITION)
               ) // inc. if current field value less-than MAX allowed
            {
                DCDC->pmpcon +=  PWM1_HIGH_DATA_SELECT;
            }
            else
            {    // if not, can't increment.
                ret = _ERROR;
            }
            break;

        default:
            break;
    }

    return ret;
}


/***********************************************************************
 *
 * Function:  LH7A400_pwm1_decrease_duty_cycle
 *
 * Purpose:
 *     decrease PWM1 duty cycle by ONE for selected power-type
 *
 * Processing:
 *   - read current PWM1 Duty-Cycles
 *   - decrease selected power-type field by 1
 *   - write back out
 *
 * Parameters:
 *   power     - Type of power connected to the LH7A400.
 *               This actually designates which register fields
 *                to access:
 *                  EXTERN_POWER or BATTERY_POWER or ALL_POWER_TYPES
 *                             {LH7A400_dcdc_driver.h}
 *
 *  Values:
 *    UNS_8 power  -  EXTERN_POWER | BATTERY_POWER | ALL_POWER_TYPES
 *
 *
 * Outputs:    None
 *
 * Returns:    None
 *       success:  _NO_ERROR
 *       failure:  _ERROR    (checks if already at MAX)
 *
 * Notes:
 *       For power == ALL_POWER_TYPES,  _ERROR return does not specify
 *        which one power-ype or both were already at MAX.
 *
 *
 **********************************************************************/
INT_8 LH7A400_pwm1_decrease_duty_cycle (UNS_8 power)
{
    INT_8   ret;

    ret = _NO_ERROR;

    switch (power)
    {
        case EXTERN_POWER:     // dec. PWM1 LOW field
            if ((DCDC->pmpcon & PWM1_LOW_DATA_MASK) >