/**
 * @file xmc_dac.c
 * @date 2015-06-19
 *
 * @cond
 **********************************************************************************
 * XMClib v2.1.12 - XMC Peripheral Driver Library 
 *
 * Copyright (c) 2015-2017, Infineon Technologies AG
 * All rights reserved.                        
 *                                             
 * Redistribution and use in source and binary forms, with or without           
 * modification,are permitted provided that the following conditions are met:   
 *                                                                              
 *   Redistributions of source code must retain the above copyright notice,      
 *   this list of conditions and the following disclaimer.                        
 * 
 *   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.                       
 * 
 *   Neither the name of the copyright holders nor the names of its contributors 
 *   may be used to endorse or promote products derived from this software without
 *   specific prior written permission.                                           
 *                                                                              
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.                                                  
 *                                                                              
 * To improve the quality of the software, users are encouraged to share        
 * modifications, enhancements or bug fixes with Infineon Technologies AG       
 * dave@infineon.com).                                                          
 **********************************************************************************
 *
 * Change History
 * --------------
 *
 * 2015-02-18:
 *     - Initial version
 *
 * 2015-06-19:
 *     - Removed GetDriverVersion API
 * @endcond 
 *
 */

/*******************************************************************************
 * HEADER FILES
 *******************************************************************************/

#include <xmc_dac.h>
#include <xmc_scu.h>

/* DAC peripheral is not available on XMC1X devices. */
#if defined(DAC)

/*******************************************************************************
 * MACROS
 *******************************************************************************/

#define XMC_DAC_MIN_FREQ_DIVIDER (16U)
#define XMC_DAC_MAX_FREQ_DIVIDER (1048576U)
#define XMC_DAC_DAC0PATL_PAT_BITSIZE (5U)

/*******************************************************************************
 * API IMPLEMENTATION
 *******************************************************************************/

/* API to enable the DAC module */
void XMC_DAC_Enable(XMC_DAC_t *const dac)
{
  XMC_UNUSED_ARG(dac);
  
#if defined(CLOCK_GATING_SUPPORTED)
  XMC_SCU_CLOCK_UngatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_DAC);
#endif
  XMC_SCU_RESET_DeassertPeripheralReset(XMC_SCU_PERIPHERAL_RESET_DAC);
}

/* API to disable the DAC module */
void XMC_DAC_Disable(XMC_DAC_t *const dac)
{
  XMC_UNUSED_ARG(dac);

  XMC_SCU_RESET_AssertPeripheralReset(XMC_SCU_PERIPHERAL_RESET_DAC);
#if defined(CLOCK_GATING_SUPPORTED)
  XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_DAC);
#endif
}

/* API to check whether DAC is enabled */
bool XMC_DAC_IsEnabled(const XMC_DAC_t *const dac)
{
  bool status;

  XMC_UNUSED_ARG(dac);

  status = XMC_SCU_RESET_IsPeripheralResetAsserted(XMC_SCU_PERIPHERAL_RESET_DAC);
  if(status == true)
  {
    status = false;
  }
  else
  {
    status = true;
  }
  return (status);
}

/* API to initialize DAC channel configuration */
void XMC_DAC_CH_Init(XMC_DAC_t *const dac, const uint8_t channel, const XMC_DAC_CH_CONFIG_t *const config)
{
  XMC_DAC_Enable(dac);

  dac->DACCFG[channel].low = config->cfg0;
  dac->DACCFG[channel].high = config->cfg1;
  if (channel < XMC_DAC_NO_CHANNELS)
  {
    XMC_DAC_CH_EnableOutput(dac, channel);
  }
}

/* API to set the waveform frequency except in Ramp and Pattern generation mode. */
XMC_DAC_CH_STATUS_t XMC_DAC_CH_SetFrequency(XMC_DAC_t *const dac,
                                            const uint8_t channel,
                                            const uint32_t frequency)
{
  uint32_t divider;
  XMC_DAC_CH_STATUS_t status;

  XMC_ASSERT("XMC_DAC_CH_SetFrequency: frequency must be greater than zero", frequency > 0U);

  divider = XMC_SCU_CLOCK_GetPeripheralClockFrequency() / frequency;

  if (divider < XMC_DAC_MIN_FREQ_DIVIDER)
  {
    status = XMC_DAC_CH_STATUS_ERROR_FREQ2HIGH;
  }
  else if (divider >= XMC_DAC_MAX_FREQ_DIVIDER)
  {
    status = XMC_DAC_CH_STATUS_ERROR_FREQ2LOW;
  }
  else {
    dac->DACCFG[channel].low = (dac->DACCFG[channel].low & (uint32_t)(~DAC_DAC0CFG0_FREQ_Msk)) |
                               (divider << DAC_DAC0CFG0_FREQ_Pos);
    status = XMC_DAC_CH_STATUS_OK;
  }

  return status;
}

/* API to set the waveform frequency in Ramp Mode. */
XMC_DAC_CH_STATUS_t XMC_DAC_CH_SetRampFrequency(XMC_DAC_t *const dac,
                                                const uint8_t channel,
                                                const uint32_t frequency)
{
  uint32_t stop;
  uint32_t start;

  start = dac->DACDATA[channel];
  stop = (dac->DAC01DATA >> (channel * DAC_DAC01DATA_DATA1_Pos)) & (uint32_t)DAC_DAC01DATA_DATA0_Msk;

  return XMC_DAC_CH_SetFrequency(dac, channel, frequency * ((stop - start) + 1U));
}

/* API to start the operation in Single Value Mode. */
XMC_DAC_CH_STATUS_t XMC_DAC_CH_StartSingleValueMode(XMC_DAC_t *const dac, const uint8_t channel)
{
  XMC_ASSERT("XMC_DAC_CH_StartSingleValueMode: dac parameter not valid\n", XMC_DAC_IS_DAC_VALID(dac));
  XMC_ASSERT("XMC_DAC_CH_StartSingleValueMode: channel parameter not valid\n", XMC_DAC_IS_CHANNEL_VALID(channel));
  XMC_ASSERT("XMC_DAC_CH_StartSingleValueMode: dac module not enabled\n", XMC_DAC_IsEnabled(dac));

  XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_SINGLE);

  return XMC_DAC_CH_STATUS_OK;
}

/* API to start the operation in Data Mode. */
XMC_DAC_CH_STATUS_t XMC_DAC_CH_StartDataMode(XMC_DAC_t *const dac,
                                             const uint8_t channel,
                                             const XMC_DAC_CH_TRIGGER_t trigger,
                                             const uint32_t frequency)
{
  XMC_DAC_CH_STATUS_t status = XMC_DAC_CH_STATUS_OK;

  XMC_ASSERT("XMC_DAC_CH_StartDataMode: dac parameter not valid\n", XMC_DAC_IS_DAC_VALID(dac));
  XMC_ASSERT("XMC_DAC_CH_StartDataMode: channel parameter not valid\n", XMC_DAC_IS_CHANNEL_VALID(channel));
  XMC_ASSERT("XMC_DAC_CH_StartDataMode: dac module not enabled\n", XMC_DAC_IsEnabled(dac));

  XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_IDLE);

  if (trigger == XMC_DAC_CH_TRIGGER_INTERNAL)
  {
    status = XMC_DAC_CH_SetFrequency(dac, channel, frequency);
  }

  if (status == XMC_DAC_CH_STATUS_OK)
  {
    XMC_DAC_CH_SetTrigger(dac, channel, trigger);
    XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_DATA);
  }

  return status;
}

/* API to start the operation in Ramp Mode. */
XMC_DAC_CH_STATUS_t XMC_DAC_CH_StartRampMode(XMC_DAC_t *const dac,
                                             const uint8_t channel,
                                             const uint16_t start,
                                             const uint16_t stop,
                                             const XMC_DAC_CH_TRIGGER_t trigger,
                                             const uint32_t frequency)
{
  XMC_DAC_CH_STATUS_t status = XMC_DAC_CH_STATUS_OK;

  XMC_ASSERT("XMC_DAC_CH_StartRampMode: dac parameter not valid\n", XMC_DAC_IS_DAC_VALID(dac));
  XMC_ASSERT("XMC_DAC_CH_StartRampMode: channel parameter not valid\n", XMC_DAC_IS_CHANNEL_VALID(channel));
  XMC_ASSERT("XMC_DAC_CH_StartRampMode: dac module not enabled\n", XMC_DAC_IsEnabled(dac));

  XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_IDLE);

  XMC_DAC_CH_SetRampStart(dac, channel, start);
  XMC_DAC_CH_SetRampStop(dac, channel, stop);
  XMC_DAC_CH_SetTrigger(dac, channel, trigger);

  if (trigger == XMC_DAC_CH_TRIGGER_INTERNAL)
  {
    status = XMC_DAC_CH_SetRampFrequency(dac, channel, frequency);
  }

  if (status == XMC_DAC_CH_STATUS_OK)
  {
    XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_RAMP);
  }

  return status;
}

/* API to start the operation in Pattern Mode. */
XMC_DAC_CH_STATUS_t XMC_DAC_CH_StartPatternMode(XMC_DAC_t *const dac,
                                                const uint8_t channel,
                                                const uint8_t *const pattern,
                                                const XMC_DAC_CH_PATTERN_SIGN_OUTPUT_t sign_output,
                                                const XMC_DAC_CH_TRIGGER_t trigger,
                                                const uint32_t frequency)
{
  XMC_DAC_CH_STATUS_t status = XMC_DAC_CH_STATUS_OK;

  XMC_ASSERT("XMC_DAC_CH_StartPatternMode: dac parameter not valid\n", XMC_DAC_IS_DAC_VALID(dac));
  XMC_ASSERT("XMC_DAC_CH_StartPatternMode: channel parameter not valid\n", XMC_DAC_IS_CHANNEL_VALID(channel));
  XMC_ASSERT("XMC_DAC_CH_StartPatternMode: dac module not enabled\n", XMC_DAC_IsEnabled(dac));

  XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_IDLE);

  if (trigger == XMC_DAC_CH_TRIGGER_INTERNAL)
  {
    status = XMC_DAC_CH_SetFrequency(dac, channel, frequency * XMC_DAC_SAMPLES_PER_PERIOD);
  }

  if (status == XMC_DAC_CH_STATUS_OK)
  {
    XMC_DAC_CH_SetPattern(dac, channel, pattern);
    if (XMC_DAC_CH_PATTERN_SIGN_OUTPUT_ENABLED == sign_output)
    {
      XMC_DAC_CH_EnablePatternSignOutput(dac, channel);
    }
    else
    {
      XMC_DAC_CH_DisablePatternSignOutput(dac, channel);
    }
    XMC_DAC_CH_SetTrigger(dac, channel, trigger);
    XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_PATTERN);
  }

  return status;
}

/* API to start the operation in Noise Mode. */
XMC_DAC_CH_STATUS_t XMC_DAC_CH_StartNoiseMode(XMC_DAC_t *const dac,
                                              const uint8_t channel,
                                              const XMC_DAC_CH_TRIGGER_t trigger,
                                              const uint32_t frequency)
{
  XMC_DAC_CH_STATUS_t status = XMC_DAC_CH_STATUS_OK;

  XMC_ASSERT("XMC_DAC_CH_StartNoiseMode: dac parameter not valid\n", XMC_DAC_IS_DAC_VALID(dac));
  XMC_ASSERT("XMC_DAC_CH_StartNoiseMode: channel parameter not valid\n", XMC_DAC_IS_CHANNEL_VALID(channel));
  XMC_ASSERT("XMC_DAC_CH_StartNoiseMode: dac module not enabled\n", XMC_DAC_IsEnabled(dac));

  XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_IDLE);

  if (trigger == XMC_DAC_CH_TRIGGER_INTERNAL)
  {
    status = XMC_DAC_CH_SetFrequency(dac, channel, frequency);
  }

  if (status == XMC_DAC_CH_STATUS_OK)
  {
    XMC_DAC_CH_SetTrigger(dac, channel, trigger);
    XMC_DAC_CH_SetMode(dac, channel, XMC_DAC_CH_MODE_NOISE);
  }

  return status;
}

/* API to write the pattern data table. */
void XMC_DAC_CH_SetPattern(XMC_DAC_t *const dac, uint8_t channel, const uint8_t *const data)
{
  uint32_t index;
  uint32_t temp;

  XMC_ASSERT("XMC_DAC_CH_SetPattern: dac parameter not valid\n", XMC_DAC_IS_DAC_VALID(dac));
  XMC_ASSERT("XMC_DAC_CH_SetPattern: channel parameter not valid\n", XMC_DAC_IS_CHANNEL_VALID(channel));
  XMC_ASSERT("XMC_DAC_CH_SetPattern: dac module not enabled\n", XMC_DAC_IsEnabled(dac));

  temp = data[0U];
  for(index = 1U; index < 6U; ++index)
  {
    temp |= (uint32_t)data[index] << (index * XMC_DAC_DAC0PATL_PAT_BITSIZE);
  }
  dac->DACPAT[channel].low = temp;

  temp = data[6U];
  for(index = 1U; index < 6U; ++index)
  {
    temp |= (uint32_t)data[index + 6U] << (index * XMC_DAC_DAC0PATL_PAT_BITSIZE);
  }
  dac->DACPAT[channel].high = temp;
}

#endif /* defined(DAC) */