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/*This file is prepared for Doxygen automatic documentation generation.*/

/*! \file *********************************************************************

 *

 * \brief AT32UC3A EVK1100 board LEDs support package.

 *

 * This file contains definitions and services related to the LED features of

 * the EVK1100 board.

 *

 * - Compiler:           IAR EWAVR32 and GNU GCC for AVR32

 * - Supported devices:  All AVR32 AT32UC3A devices can be used.

 * - AppNote:

 *

 * \author               Atmel Corporation: http://www.atmel.com \n

 *                       Support and FAQ: http://support.atmel.no/

 *

 ******************************************************************************/

/* Copyright (c) 2007, Atmel Corporation All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 * this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 * this list of conditions and the following disclaimer in the documentation

 * and/or other materials provided with the distribution.

 *

 * 3. The name of ATMEL may not be used to endorse or promote products derived

 * from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND

 * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,

 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <avr32/io.h>

#include "preprocessor.h"

#include "compiler.h"

#include "evk1100.h"

#include "led.h"

//! Structure describing LED hardware connections.

typedef const struct

{

  struct

  {

    U32 PORT;     //!< LED GPIO port.

    U32 PIN_MASK; //!< Bit-mask of LED pin in GPIO port.

  } GPIO; //!< LED GPIO descriptor.

  struct

  {

    S32 CHANNEL;  //!< LED PWM channel (< 0 if N/A).

    S32 FUNCTION; //!< LED pin PWM function (< 0 if N/A).

  } PWM;  //!< LED PWM descriptor.

} tLED_DESCRIPTOR;

//! Hardware descriptors of all LEDs.

static tLED_DESCRIPTOR LED_DESCRIPTOR[LED_COUNT] =

{

#define INSERT_LED_DESCRIPTOR(LED_NO, unused)                 \

  {                                                           \

    {LED##LED_NO##_GPIO / 32, 1 << (LED##LED_NO##_GPIO % 32)},\

    {LED##LED_NO##_PWM,       LED##LED_NO##_PWM_FUNCTION    } \

  },

  MREPEAT(LED_COUNT, INSERT_LED_DESCRIPTOR, ~)

#undef INSERT_LED_DESCRIPTOR

};

//! Saved state of all LEDs.

static volatile U32 LED_State = (1 << LED_COUNT) - 1;

U32 LED_Read_Display(void)

{

  return LED_State;

}

void LED_Display(U32 leds)

{

  tLED_DESCRIPTOR *led_descriptor;

  volatile avr32_gpio_port_t *led_gpio_port;

  leds &= (1 << LED_COUNT) - 1;

  LED_State = leds;

  for (led_descriptor = &LED_DESCRIPTOR[0];

       led_descriptor < LED_DESCRIPTOR + LED_COUNT;

       led_descriptor++)

  {

    led_gpio_port = &AVR32_GPIO.port[led_descriptor->GPIO.PORT];

    if (leds & 1)

    {

      led_gpio_port->ovrc  = led_descriptor->GPIO.PIN_MASK;

    }

    else

    {

      led_gpio_port->ovrs  = led_descriptor->GPIO.PIN_MASK;

    }

    led_gpio_port->oders = led_descriptor->GPIO.PIN_MASK;

    led_gpio_port->gpers = led_descriptor->GPIO.PIN_MASK;

    leds >>= 1;

  }

}

U32 LED_Read_Display_Mask(U32 mask)

{

  return Rd_bits(LED_State, mask);

}

void LED_Display_Mask(U32 mask, U32 leds)

{

  tLED_DESCRIPTOR *led_descriptor = &LED_DESCRIPTOR[0] - 1;

  volatile avr32_gpio_port_t *led_gpio_port;

  U8 led_shift;

  mask &= (1 << LED_COUNT) - 1;

  Wr_bits(LED_State, mask, leds);

  while (mask)

  {

    led_shift = 1 + ctz(mask);

    led_descriptor += led_shift;

    led_gpio_port = &AVR32_GPIO.port[led_descriptor->GPIO.PORT];

    leds >>= led_shift - 1;

    if (leds & 1)

    {

      led_gpio_port->ovrc  = led_descriptor->GPIO.PIN_MASK;

    }

    else

    {

      led_gpio_port->ovrs  = led_descriptor->GPIO.PIN_MASK;

    }

    led_gpio_port->oders = led_descriptor->GPIO.PIN_MASK;

    led_gpio_port->gpers = led_descriptor->GPIO.PIN_MASK;

    leds >>= 1;

    mask >>= led_shift;

  }

}

Bool LED_Test(U32 leds)

{

  return Tst_bits(LED_State, leds);

}

void LED_Off(U32 leds)

{

  tLED_DESCRIPTOR *led_descriptor = &LED_DESCRIPTOR[0] - 1;

  volatile avr32_gpio_port_t *led_gpio_port;

  U8 led_shift;

  leds &= (1 << LED_COUNT) - 1;

  Clr_bits(LED_State, leds);

  while (leds)

  {

    led_shift = 1 + ctz(leds);

    led_descriptor += led_shift;

    led_gpio_port = &AVR32_GPIO.port[led_descriptor->GPIO.PORT];

    led_gpio_port->ovrs  = led_descriptor->GPIO.PIN_MASK;

    led_gpio_port->oders = led_descriptor->GPIO.PIN_MASK;

    led_gpio_port->gpers = led_descriptor->GPIO.PIN_MASK;

    leds >>= led_shift;

  }

}

void LED_On(U32 leds)

{

  tLED_DESCRIPTOR *led_descriptor = &LED_DESCRIPTOR[0] - 1;

  volatile avr32_gpio_port_t *led_gpio_port;

  U8 led_shift;

  leds &= (1 << LED_COUNT) - 1;

  Set_bits(LED_State, leds);

  while (leds)

  {

    led_shift = 1 + ctz(leds);

    led_descriptor += led_shift;

    led_gpio_port = &AVR32_GPIO.port[led_descriptor->GPIO.PORT];

    led_gpio_port->ovrc  = led_descriptor->GPIO.PIN_MASK;

    led_gpio_port->oders = led_descriptor->GPIO.PIN_MASK;

    led_gpio_port->gpers = led_descriptor->GPIO.PIN_MASK;

    leds >>= led_shift;

  }

}

void LED_Toggle(U32 leds)

{

  tLED_DESCRIPTOR *led_descriptor = &LED_DESCRIPTOR[0] - 1;

  volatile avr32_gpio_port_t *led_gpio_port;

  U8 led_shift;

  leds &= (1 << LED_COUNT) - 1;

  Tgl_bits(LED_State, leds);

  while (leds)

  {

    led_shift = 1 + ctz(leds);

    led_descriptor += led_shift;

    led_gpio_port = &AVR32_GPIO.port[led_descriptor->GPIO.PORT];

    led_gpio_port->ovrt  = led_descriptor->GPIO.PIN_MASK;

    led_gpio_port->oders = led_descriptor->GPIO.PIN_MASK;

    led_gpio_port->gpers = led_descriptor->GPIO.PIN_MASK;

    leds >>= led_shift;

  }

}

U32 LED_Read_Display_Field(U32 field)

{

  return Rd_bitfield(LED_State, field);

}

void LED_Display_Field(U32 field, U32 leds)

{

  LED_Display_Mask(field, leds << ctz(field));

}

U8 LED_Get_Intensity(U32 led)

{

  tLED_DESCRIPTOR *led_descriptor;

  // Check that the argument value is valid.

  led = ctz(led);

  led_descriptor = &LED_DESCRIPTOR[led];

  if (led >= LED_COUNT || led_descriptor->PWM.CHANNEL < 0) return 0;

  // Return the duty cycle value if the LED PWM channel is enabled, else 0.

  return (AVR32_PWM.sr & (1 << led_descriptor->PWM.CHANNEL)) ?

           AVR32_PWM.channel[led_descriptor->PWM.CHANNEL].cdty : 0;

}

void LED_Set_Intensity(U32 leds, U8 intensity)

{

  tLED_DESCRIPTOR *led_descriptor = &LED_DESCRIPTOR[0] - 1;

  volatile avr32_pwm_channel_t *led_pwm_channel;

  volatile avr32_gpio_port_t *led_gpio_port;

  U8 led_shift;

  // For each specified LED...

  for (leds &= (1 << LED_COUNT) - 1; leds; leds >>= led_shift)

  {

    // Select the next specified LED and check that it has a PWM channel.

    led_shift = 1 + ctz(leds);

    led_descriptor += led_shift;

    if (led_descriptor->PWM.CHANNEL < 0) continue;

    // Initialize or update the LED PWM channel.

    led_pwm_channel = &AVR32_PWM.channel[led_descriptor->PWM.CHANNEL];

    if (!(AVR32_PWM.sr & (1 << led_descriptor->PWM.CHANNEL)))

    {

      led_pwm_channel->cmr = (AVR32_PWM_CPRE_MCK << AVR32_PWM_CPRE_OFFSET) &

                             ~(AVR32_PWM_CALG_MASK |

                               AVR32_PWM_CPOL_MASK |

                               AVR32_PWM_CPD_MASK);

      led_pwm_channel->cprd = 0x000000FF;

      led_pwm_channel->cdty = intensity;

      AVR32_PWM.ena = 1 << led_descriptor->PWM.CHANNEL;

    }

    else

    {

      AVR32_PWM.isr;

      while (!(AVR32_PWM.isr & (1 << led_descriptor->PWM.CHANNEL)));

      led_pwm_channel->cupd = intensity;

    }

    // Switch the LED pin to its PWM function.

    led_gpio_port = &AVR32_GPIO.port[led_descriptor->GPIO.PORT];

    if (led_descriptor->PWM.FUNCTION & 0x1)

    {

      led_gpio_port->pmr0s = led_descriptor->GPIO.PIN_MASK;

    }

    else

    {

      led_gpio_port->pmr0c = led_descriptor->GPIO.PIN_MASK;

    }

    if (led_descriptor->PWM.FUNCTION & 0x2)

    {

      led_gpio_port->pmr1s = led_descriptor->GPIO.PIN_MASK;

    }

    else

    {

      led_gpio_port->pmr1c = led_descriptor->GPIO.PIN_MASK;

    }

    led_gpio_port->gperc = led_descriptor->GPIO.PIN_MASK;

  }

}