Revision bbeeceaf

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include/TLC5947/v1/alld_TLC5947_v1.h
48 48 
#define TLC5947_LLD_BLANK_ACTIVE_STATE          APAL_GPIO_ACTIVE_HIGH
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/**


  		




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 * @brief   Active state of the XLAT signal.


  		




  
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 * @brief   Signal edge of the XLAT signal, which causes the SPI registers to be latched to the output.


  		




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 */


  		




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#define TLC5947_LLD_XLAT_ACTIVE_STATE           APAL_GPIO_ACTIVE_HIGH


  		




  
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#define TLC5947_LLD_XLAT_UPDATE_EDGE            APAL_GPIO_EDGE_RISING


  		




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/**


  		




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 * @brief   Number of PWM channels.


  		




  ......




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 */


  		




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typedef struct {


  		




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  apalSPIDriver_t* spi_driver;    /**< @brief The SPI Driver.                           */


  		




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  const apalControlGpio_t* blank_gpio;  /**< @brief The identifier of the BLANK signal GPIO.  */


  		




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  const apalControlGpio_t* xlat_gpio;   /**< @brief The identifier of the XLAT signal GPIO.   */


  		




  
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  const apalControlGpio_t* blank_gpio;  /**< @brief The identifier of the BLANK signal GPIO (may be @p NULL).  */


  		




  
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  const apalControlGpio_t* xlat_gpio;   /**< @brief The identifier of the XLAT signal GPIO (may be @p NULL).   */


  		




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} TLC5947Driver;


  		




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/**


  		












  

    
      source/TLC5947/v1/alld_TLC5947_v1.c
    
  





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{


  		




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  apalDbgAssert(tlc5947 != NULL);


  		




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  // set the output value of the GPIO pin depending on the activation property


  		




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  return apalControlGpioSet(tlc5947->blank_gpio, blank == TLC5947_LLD_BLANK_ENABLE ? APAL_GPIO_ON : APAL_GPIO_OFF);


  		




  
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  // BLANK signal is optional


  		




  
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  if (tlc5947->blank_gpio == NULL) {


  		




  
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    return APAL_STATUS_WARNING;


  		




  
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  } else {


  		




  
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    // set the output value of the GPIO pin depending on the activation property


  		




  
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    return apalControlGpioSet(tlc5947->blank_gpio, blank == TLC5947_LLD_BLANK_ENABLE ? APAL_GPIO_ON : APAL_GPIO_OFF);


  		




  
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  }


  		




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}


  		




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/**


  		




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  apalDbgAssert(tlc5947 != NULL);


  		




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  apalDbgAssert(blank != NULL);


  		




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  apalControlGpioState_t gpio_state;


  		




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  apalExitStatus_t status = apalControlGpioGet(tlc5947->blank_gpio, &gpio_state);


  		




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  *blank = gpio_state == APAL_GPIO_ON ? TLC5947_LLD_BLANK_ENABLE : TLC5947_LLD_BLANK_DISABLE;


  		




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  return status;


  		




  
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  // BLANK signal is optional


  		




  
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  if (tlc5947->blank_gpio == NULL) {


  		




  
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    return APAL_STATUS_WARNING;


  		




  
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  } else {


  		




  
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    apalControlGpioState_t gpio_state;


  		




  
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    apalExitStatus_t status = apalControlGpioGet(tlc5947->blank_gpio, &gpio_state);


  		




  
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    *blank = gpio_state == APAL_GPIO_ON ? TLC5947_LLD_BLANK_ENABLE : TLC5947_LLD_BLANK_DISABLE;


  		




  
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    return status;


  		




  
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  }


  		




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}


  		




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/**


  		




  ......




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{


  		




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  apalDbgAssert(tlc5947 != NULL);


  		




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  apalExitStatus_t status = apalControlGpioSet(tlc5947->xlat_gpio, APAL_GPIO_ON);


  		




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  // The XLAT signal has to be active for at least 30 ns.


  		




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  // It is assumed that that these function calls satisfy this requirement even without explicit delay.


  		




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  if (apalControlGpioSet(tlc5947->xlat_gpio, APAL_GPIO_OFF) == APAL_STATUS_OK && status == APAL_STATUS_OK) {


  		




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    return APAL_STATUS_OK;


  		




  
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  // XLAT signal GPIO is optional


  		




  
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  if (tlc5947->xlat_gpio == NULL) {


  		




  
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    return APAL_STATUS_WARNING;


  		




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  } else {


  		




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    return APAL_STATUS_ERROR;


  		




  
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    apalExitStatus_t status = apalGpioWrite(tlc5947->xlat_gpio->gpio, (tlc5947->xlat_gpio->meta.edge == APAL_GPIO_EDGE_RISING) ? APAL_GPIO_LOW : APAL_GPIO_HIGH);


  		




  
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    // The XLAT signal has to be active for at least 30 ns.


  		




  
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    // It is assumed that that these function calls satisfy this requirement even without explicit delay.


  		




  
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    status |= apalGpioWrite(tlc5947->xlat_gpio->gpio, (tlc5947->xlat_gpio->meta.edge == APAL_GPIO_EDGE_RISING) ? APAL_GPIO_HIGH : APAL_GPIO_LOW);


  		




  
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    return status;


  		




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  }


  		




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}


  		




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