FreeRTOS/Demo/CORTEX_EFM32_Giant_Gecko_Simplicity_Studio/SiLabs_Source/emlib/em_ebi.c

/***************************************************************************//**
 * @file em_ebi.c
 * @brief External Bus Interface (EBI) Peripheral API
 * @version 4.2.1
 *******************************************************************************
 * @section License
 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
 *******************************************************************************
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software.
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 *
 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
 * obligation to support this Software. Silicon Labs is providing the
 * Software "AS IS", with no express or implied warranties of any kind,
 * including, but not limited to, any implied warranties of merchantability
 * or fitness for any particular purpose or warranties against infringement
 * of any proprietary rights of a third party.
 *
 * Silicon Labs will not be liable for any consequential, incidental, or
 * special damages, or any other relief, or for any claim by any third party,
 * arising from your use of this Software.
 *
 ******************************************************************************/

#include "em_ebi.h"
#if defined(EBI_COUNT) && (EBI_COUNT > 0)
#include "em_assert.h"
#include "em_bus.h"

/***************************************************************************//**
 * @addtogroup EM_Library
 * @{
 ******************************************************************************/

/***************************************************************************//**
 * @addtogroup EBI
 * @brief EBI External Bus Interface (EBI) Peripheral API
 * @{
 ******************************************************************************/

/***************************************************************************//**
 * @brief
 *   Configure and enable External Bus Interface
 *
 * @param[in] ebiInit
 *   EBI configuration structure
 *
 * @note
 *   GPIO lines must be configured as PUSH_PULL for correct operation
 *   GPIO and EBI clocks must be enabled in the CMU
 ******************************************************************************/
void EBI_Init(const EBI_Init_TypeDef *ebiInit)
{
  uint32_t ctrl = EBI->CTRL;

#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
  /* Enable Independent Timing for devices that supports it */
  ctrl |= EBI_CTRL_ITS;

  /* Set polarity of address ready */
  EBI_BankPolaritySet(ebiInit->banks, ebiLineARDY, ebiInit->ardyPolarity);
  /* Set polarity of address latch enable */
  EBI_BankPolaritySet(ebiInit->banks, ebiLineALE, ebiInit->alePolarity);
  /* Set polarity of write enable */
  EBI_BankPolaritySet(ebiInit->banks, ebiLineWE, ebiInit->wePolarity);
  /* Set polarity of read enable */
  EBI_BankPolaritySet(ebiInit->banks, ebiLineRE, ebiInit->rePolarity);
  /* Set polarity of chip select lines */
  EBI_BankPolaritySet(ebiInit->banks, ebiLineCS, ebiInit->csPolarity);
  /* Set polarity of byte lane line */
  EBI_BankPolaritySet(ebiInit->banks, ebiLineBL, ebiInit->blPolarity);
#else
  /* Set polarity of address ready */
  EBI_PolaritySet(ebiLineARDY, ebiInit->ardyPolarity);
  /* Set polarity of address latch enable */
  EBI_PolaritySet(ebiLineALE, ebiInit->alePolarity);
  /* Set polarity of write enable */
  EBI_PolaritySet(ebiLineWE, ebiInit->wePolarity);
  /* Set polarity of read enable */
  EBI_PolaritySet(ebiLineRE, ebiInit->rePolarity);
  /* Set polarity of chip select lines */
  EBI_PolaritySet(ebiLineCS, ebiInit->csPolarity);
#endif

  /* Configure EBI mode and control settings  */
#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
  if (ebiInit->banks & EBI_BANK0)
  {
    ctrl &= ~(_EBI_CTRL_MODE_MASK
              | _EBI_CTRL_ARDYEN_MASK
              | _EBI_CTRL_ARDYTODIS_MASK
              | _EBI_CTRL_BL_MASK
              | _EBI_CTRL_NOIDLE_MASK
              | _EBI_CTRL_BANK0EN_MASK);
    ctrl |= (ebiInit->mode << _EBI_CTRL_MODE_SHIFT);
    ctrl |= (ebiInit->ardyEnable << _EBI_CTRL_ARDYEN_SHIFT);
    ctrl |= (ebiInit->ardyDisableTimeout << _EBI_CTRL_ARDYTODIS_SHIFT);
    ctrl |= (ebiInit->blEnable << _EBI_CTRL_BL_SHIFT);
    ctrl |= (ebiInit->noIdle << _EBI_CTRL_NOIDLE_SHIFT);
    if ( ebiInit->enable)
    {
      ctrl |= EBI_CTRL_BANK0EN;
    }
  }
  if (ebiInit->banks & EBI_BANK1)
  {
    ctrl &= ~(_EBI_CTRL_BL1_MASK
              | _EBI_CTRL_MODE1_MASK
              | _EBI_CTRL_ARDY1EN_MASK
              | _EBI_CTRL_ARDYTO1DIS_MASK
              | _EBI_CTRL_NOIDLE1_MASK
              | _EBI_CTRL_BANK1EN_MASK);
    ctrl |= (ebiInit->mode << _EBI_CTRL_MODE1_SHIFT);
    ctrl |= (ebiInit->ardyEnable << _EBI_CTRL_ARDY1EN_SHIFT);
    ctrl |= (ebiInit->ardyDisableTimeout << _EBI_CTRL_ARDYTO1DIS_SHIFT);
    ctrl |= (ebiInit->blEnable << _EBI_CTRL_BL1_SHIFT);
    ctrl |= (ebiInit->noIdle << _EBI_CTRL_NOIDLE1_SHIFT);
    if ( ebiInit->enable)
    {
      ctrl |= EBI_CTRL_BANK1EN;
    }
  }
  if (ebiInit->banks & EBI_BANK2)
  {
    ctrl &= ~(_EBI_CTRL_BL2_MASK
              | _EBI_CTRL_MODE2_MASK
              | _EBI_CTRL_ARDY2EN_MASK
              | _EBI_CTRL_ARDYTO2DIS_MASK
              | _EBI_CTRL_NOIDLE2_MASK
              | _EBI_CTRL_BANK2EN_MASK);
    ctrl |= (ebiInit->mode << _EBI_CTRL_MODE2_SHIFT);
    ctrl |= (ebiInit->ardyEnable << _EBI_CTRL_ARDY2EN_SHIFT);
    ctrl |= (ebiInit->ardyDisableTimeout << _EBI_CTRL_ARDYTO2DIS_SHIFT);
    ctrl |= (ebiInit->blEnable << _EBI_CTRL_BL2_SHIFT);
    ctrl |= (ebiInit->noIdle << _EBI_CTRL_NOIDLE2_SHIFT);
    if ( ebiInit->enable)
    {
      ctrl |= EBI_CTRL_BANK2EN;
    }
  }
  if (ebiInit->banks & EBI_BANK3)
  {
    ctrl &= ~(_EBI_CTRL_BL3_MASK
              | _EBI_CTRL_MODE3_MASK
              | _EBI_CTRL_ARDY3EN_MASK
              | _EBI_CTRL_ARDYTO3DIS_MASK
              | _EBI_CTRL_NOIDLE3_MASK
              | _EBI_CTRL_BANK3EN_MASK);
    ctrl |= (ebiInit->mode << _EBI_CTRL_MODE3_SHIFT);
    ctrl |= (ebiInit->ardyEnable << _EBI_CTRL_ARDY3EN_SHIFT);
    ctrl |= (ebiInit->ardyDisableTimeout << _EBI_CTRL_ARDYTO3DIS_SHIFT);
    ctrl |= (ebiInit->blEnable << _EBI_CTRL_BL3_SHIFT);
    ctrl |= (ebiInit->noIdle << _EBI_CTRL_NOIDLE3_SHIFT);
    if ( ebiInit->enable)
    {
      ctrl |= EBI_CTRL_BANK3EN;
    }
  }
#else
  ctrl &= ~(_EBI_CTRL_MODE_MASK
            | _EBI_CTRL_ARDYEN_MASK
            | _EBI_CTRL_ARDYTODIS_MASK
            | _EBI_CTRL_BANK0EN_MASK
            | _EBI_CTRL_BANK1EN_MASK
            | _EBI_CTRL_BANK2EN_MASK
            | _EBI_CTRL_BANK3EN_MASK);
  if ( ebiInit->enable)
  {
    if ( ebiInit->banks & EBI_BANK0 )
    {
      ctrl |= EBI_CTRL_BANK0EN;
    }
    if ( ebiInit->banks & EBI_BANK1 )
    {
      ctrl |= EBI_CTRL_BANK1EN;
    }
    if ( ebiInit->banks & EBI_BANK2 )
    {
      ctrl |= EBI_CTRL_BANK2EN;
    }
    if ( ebiInit->banks & EBI_BANK3 )
    {
      ctrl |= EBI_CTRL_BANK3EN;
    }
  }
  ctrl |= ebiInit->mode;
  ctrl |= (ebiInit->ardyEnable << _EBI_CTRL_ARDYEN_SHIFT);
  ctrl |= (ebiInit->ardyDisableTimeout << _EBI_CTRL_ARDYTODIS_SHIFT);
#endif

  /* Configure timing */
#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
  EBI_BankReadTimingSet(ebiInit->banks,
                        ebiInit->readSetupCycles,
                        ebiInit->readStrobeCycles,
                        ebiInit->readHoldCycles);
  EBI_BankReadTimingConfig(ebiInit->banks,
                           ebiInit->readPageMode,
                           ebiInit->readPrefetch,
                           ebiInit->readHalfRE);
  EBI_BankWriteTimingSet(ebiInit->banks,
                         ebiInit->writeSetupCycles,
                         ebiInit->writeStrobeCycles,
                         ebiInit->writeHoldCycles);
  EBI_BankWriteTimingConfig(ebiInit->banks,
                            ebiInit->writeBufferDisable,
                            ebiInit->writeHalfWE);
  EBI_BankAddressTimingSet(ebiInit->banks,
                           ebiInit->addrSetupCycles,
                           ebiInit->addrHoldCycles);
  EBI_BankAddressTimingConfig(ebiInit->banks,
                              ebiInit->addrHalfALE);
#else
  EBI_ReadTimingSet(ebiInit->readSetupCycles,
                    ebiInit->readStrobeCycles,
                    ebiInit->readHoldCycles);
  EBI_WriteTimingSet(ebiInit->writeSetupCycles,
                     ebiInit->writeStrobeCycles,
                     ebiInit->writeHoldCycles);
  EBI_AddressTimingSet(ebiInit->addrSetupCycles,
                       ebiInit->addrHoldCycles);
#endif

  /* Activate new configuration */
  EBI->CTRL = ctrl;

  /* Configure Adress Latch Enable */
  switch (ebiInit->mode)
  {
    case ebiModeD16A16ALE:
    case ebiModeD8A24ALE:
      /* Address Latch Enable */
      BUS_RegBitWrite(&(EBI->ROUTE), _EBI_ROUTE_ALEPEN_SHIFT, 1);
      break;
#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
    case ebiModeD16:
#endif
    case ebiModeD8A8:
      /* Make sure Address Latch is disabled */
      BUS_RegBitWrite(&(EBI->ROUTE), _EBI_ROUTE_ALEPEN_SHIFT, 0);
      break;
  }
#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
  /* Limit pin enable */
  EBI->ROUTE = (EBI->ROUTE & ~_EBI_ROUTE_ALB_MASK) | ebiInit->aLow;
  EBI->ROUTE = (EBI->ROUTE & ~_EBI_ROUTE_APEN_MASK) | ebiInit->aHigh;
  /* Location */
  EBI->ROUTE = (EBI->ROUTE & ~_EBI_ROUTE_LOCATION_MASK) | ebiInit->location;

  /* Enable EBI BL pin if necessary */
  if(ctrl & (_EBI_CTRL_BL_MASK|_EBI_CTRL_BL1_MASK|_EBI_CTRL_BL2_MASK|_EBI_CTRL_BL3_MASK))
  {
    BUS_RegBitWrite(&(EBI->ROUTE), _EBI_ROUTE_BLPEN_SHIFT, ebiInit->blEnable);
  }
#endif
  /* Enable EBI pins EBI_WEn and EBI_REn */
  BUS_RegBitWrite(&(EBI->ROUTE), _EBI_ROUTE_EBIPEN_SHIFT, 1);

  /* Enable chip select lines */
  EBI_ChipSelectEnable(ebiInit->csLines, true);
}


/***************************************************************************//**
 * @brief
 *   Disable External Bus Interface
 ******************************************************************************/
void EBI_Disable(void)
{
  /* Disable pins */
  EBI->ROUTE = _EBI_ROUTE_RESETVALUE;
  /* Disable banks */
  EBI->CTRL = _EBI_CTRL_RESETVALUE;
}


/***************************************************************************//**
 * @brief
 *   Enable or disable EBI Bank
 *
 * @param[in] banks
 *   Banks to reconfigure, mask of EBI_BANK<n> flags
 *
 * @param[in] enable
 *   True to enable, false to disable
 ******************************************************************************/
void EBI_BankEnable(uint32_t banks, bool enable)
{
  if (banks & EBI_BANK0)
  {
    BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_BANK0EN_SHIFT, enable);
  }
  if (banks & EBI_BANK1)
  {
    BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_BANK1EN_SHIFT, enable);
  }
  if (banks & EBI_BANK2)
  {
    BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_BANK2EN_SHIFT, enable);
  }
  if (banks & EBI_BANK3)
  {
    BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_BANK3EN_SHIFT, enable);
  }
}


/***************************************************************************//**
 * @brief
 *   Return base address of EBI bank
 *
 * @param[in] bank
 *   Bank to return start address for
 *
 * @return
 *   Absolute address of bank
 ******************************************************************************/
uint32_t EBI_BankAddress(uint32_t bank)
{
#if defined (_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
  if(EBI->CTRL & EBI_CTRL_ALTMAP)
  {
    switch (bank)
    {
      case EBI_BANK0:
        return(EBI_MEM_BASE);

      case EBI_BANK1:
        return(EBI_MEM_BASE + 0x10000000UL);

      case EBI_BANK2:
        return(EBI_MEM_BASE + 0x20000000UL);

      case EBI_BANK3:
        return(EBI_MEM_BASE + 0x30000000UL);

      default:
        EFM_ASSERT(0);
        break;
    }
  }
#endif
  switch (bank)
  {
    case EBI_BANK0:
      return(EBI_MEM_BASE);

    case EBI_BANK1:
      return(EBI_MEM_BASE + 0x04000000UL);

    case EBI_BANK2:
      return(EBI_MEM_BASE + 0x08000000UL);

    case EBI_BANK3:
      return(EBI_MEM_BASE + 0x0C000000UL);

    default:
      EFM_ASSERT(0);
      break;
  }
  return 0;
}


/***************************************************************************//**
 * @brief
 *   Enable or disable EBI Chip Select
 *
 * @param[in] cs
 *   ChipSelect lines to reconfigure, mask of EBI_CS<n> flags
 *
 * @param[in] enable
 *   True to enable, false to disable
 ******************************************************************************/
void EBI_ChipSelectEnable(uint32_t cs, bool enable)
{
  if (cs & EBI_CS0)
  {
    BUS_RegBitWrite(&(EBI->ROUTE), _EBI_ROUTE_CS0PEN_SHIFT, enable);
  }
  if (cs & EBI_CS1)
  {
    BUS_RegBitWrite(&(EBI->ROUTE), _EBI_ROUTE_CS1PEN_SHIFT, enable);
  }
  if (cs & EBI_CS2)
  {
    BUS_RegBitWrite(&(EBI->ROUTE), _EBI_ROUTE_CS2PEN_SHIFT, enable);
  }
  if (cs & EBI_CS3)
  {
    BUS_RegBitWrite(&(EBI->ROUTE), _EBI_ROUTE_CS3PEN_SHIFT, enable);
  }
}


/***************************************************************************//**
 * @brief
 *   Configure EBI pin polarity
 *
 * @param[in] line
 *   Which pin/line to configure
 *
 * @param[in] polarity
 *   Active high, or active low
 ******************************************************************************/
void EBI_PolaritySet(EBI_Line_TypeDef line, EBI_Polarity_TypeDef polarity)
{
  switch (line)
  {
    case ebiLineARDY:
      BUS_RegBitWrite(&(EBI->POLARITY), _EBI_POLARITY_ARDYPOL_SHIFT, polarity);
      break;
    case ebiLineALE:
      BUS_RegBitWrite(&(EBI->POLARITY), _EBI_POLARITY_ALEPOL_SHIFT, polarity);
      break;
    case ebiLineWE:
      BUS_RegBitWrite(&(EBI->POLARITY), _EBI_POLARITY_WEPOL_SHIFT, polarity);
      break;
    case ebiLineRE:
      BUS_RegBitWrite(&(EBI->POLARITY), _EBI_POLARITY_REPOL_SHIFT, polarity);
      break;
    case ebiLineCS:
      BUS_RegBitWrite(&(EBI->POLARITY), _EBI_POLARITY_CSPOL_SHIFT, polarity);
      break;
#if defined (_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
    case ebiLineBL:
      BUS_RegBitWrite(&(EBI->POLARITY), _EBI_POLARITY_BLPOL_SHIFT, polarity);
      break;
    case ebiLineTFTVSync:
      BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_VSYNCPOL_SHIFT, polarity);
      break;
    case ebiLineTFTHSync:
      BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_HSYNCPOL_SHIFT, polarity);
      break;
    case ebiLineTFTDataEn:
      BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_DATAENPOL_SHIFT, polarity);
      break;
    case ebiLineTFTDClk:
      BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_DCLKPOL_SHIFT, polarity);
      break;
    case ebiLineTFTCS:
      BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_CSPOL_SHIFT, polarity);
      break;
#endif
    default:
      EFM_ASSERT(0);
      break;
  }
}


/***************************************************************************//**
 * @brief
 *   Configure timing values of read bus accesses
 *
 * @param[in] setupCycles
 *   Number of clock cycles for address setup before REn is asserted
 *
 * @param[in] strobeCycles
 *   The number of cycles the REn is held active. After the specified number of
 *   cycles, data is read. If set to 0, 1 cycle is inserted by HW
 *
 * @param[in] holdCycles
 *   The number of cycles CSn is held active after the REn is dessarted
 ******************************************************************************/
void EBI_ReadTimingSet(int setupCycles, int strobeCycles, int holdCycles)
{
  uint32_t readTiming;

  /* Check that timings are within limits */
  EFM_ASSERT(setupCycles < 4);
  EFM_ASSERT(strobeCycles < 16);
  EFM_ASSERT(holdCycles < 4);

  /* Configure timing values */
  readTiming = (setupCycles << _EBI_RDTIMING_RDSETUP_SHIFT)
               | (strobeCycles << _EBI_RDTIMING_RDSTRB_SHIFT)
               | (holdCycles << _EBI_RDTIMING_RDHOLD_SHIFT);


  EBI->RDTIMING = (EBI->RDTIMING
                   & ~(_EBI_RDTIMING_RDSETUP_MASK
                       | _EBI_RDTIMING_RDSTRB_MASK
                       | _EBI_RDTIMING_RDHOLD_MASK))
                  | readTiming;
}


/***************************************************************************//**
 * @brief
 *   Configure timing values of write bus accesses
 *
 * @param[in] setupCycles
 *   Number of clock cycles for address setup before WEn is asserted
 *
 * @param[in] strobeCycles
 *   Number of cycles WEn is held active. If set to 0, 1 cycle is inserted by HW
 *
 * @param[in] holdCycles
 *   Number of cycles CSn is held active after the WEn is deasserted
 ******************************************************************************/
void EBI_WriteTimingSet(int setupCycles, int strobeCycles, int holdCycles)
{
  uint32_t writeTiming;

  /* Check that timings are within limits */
  EFM_ASSERT(setupCycles < 4);
  EFM_ASSERT(strobeCycles < 16);
  EFM_ASSERT(holdCycles < 4);

  /* Configure timing values */
  writeTiming = (setupCycles << _EBI_WRTIMING_WRSETUP_SHIFT)
                | (strobeCycles << _EBI_WRTIMING_WRSTRB_SHIFT)
                | (holdCycles << _EBI_WRTIMING_WRHOLD_SHIFT);

  EBI->WRTIMING = (EBI->WRTIMING
                   & ~(_EBI_WRTIMING_WRSETUP_MASK
                       | _EBI_WRTIMING_WRSTRB_MASK
                       | _EBI_WRTIMING_WRHOLD_MASK))
                  | writeTiming;
}


/***************************************************************************//**
 * @brief
 *   Configure timing values of address latch bus accesses
 *
 * @param[in] setupCycles
 *   Sets the number of cycles the address is held after ALE is asserted
 *
 * @param[in] holdCycles
 *   Sets the number of cycles the address is driven onto the ADDRDAT bus before
 *   ALE is asserted. If set 0, 1 cycle is inserted by HW
 ******************************************************************************/
void EBI_AddressTimingSet(int setupCycles, int holdCycles)
{
  uint32_t addressLatchTiming;

  /* Check that timing values are within limits */
  EFM_ASSERT(setupCycles < 4);
  EFM_ASSERT(holdCycles < 4);

  /* Configure address latch timing values */
  addressLatchTiming = (setupCycles << _EBI_ADDRTIMING_ADDRSETUP_SHIFT)
                       | (holdCycles << _EBI_ADDRTIMING_ADDRHOLD_SHIFT);

  EBI->ADDRTIMING = (EBI->ADDRTIMING
                     & ~(_EBI_ADDRTIMING_ADDRSETUP_MASK
                         | _EBI_ADDRTIMING_ADDRHOLD_MASK))
                    | addressLatchTiming;
}

#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
/***************************************************************************//**
 * @brief
 *   Configure and initialize TFT Direct Drive
 *
 * @param[in] ebiTFTInit
 *   TFT Initialization structure
 ******************************************************************************/
void EBI_TFTInit(const EBI_TFTInit_TypeDef *ebiTFTInit)
{
  uint32_t ctrl;

  /* Configure base address for frame buffer offset to EBI bank */
  EBI_TFTFrameBaseSet(ebiTFTInit->addressOffset);

  /* Configure display size and porch areas */
  EBI_TFTSizeSet(ebiTFTInit->hsize,
                 ebiTFTInit->vsize);
  EBI_TFTHPorchSet(ebiTFTInit->hPorchFront,
                   ebiTFTInit->hPorchBack,
                   ebiTFTInit->hPulseWidth);
  EBI_TFTVPorchSet(ebiTFTInit->vPorchFront,
                   ebiTFTInit->vPorchBack,
                   ebiTFTInit->vPulseWidth);

  /* Configure timing settings */
  EBI_TFTTimingSet(ebiTFTInit->dclkPeriod,
                   ebiTFTInit->startPosition,
                   ebiTFTInit->setupCycles,
                   ebiTFTInit->holdCycles);

  /* Configure line polarity settings */
  EBI_PolaritySet(ebiLineTFTCS, ebiTFTInit->csPolarity);
  EBI_PolaritySet(ebiLineTFTDClk, ebiTFTInit->dclkPolarity);
  EBI_PolaritySet(ebiLineTFTDataEn, ebiTFTInit->dataenPolarity);
  EBI_PolaritySet(ebiLineTFTVSync, ebiTFTInit->vsyncPolarity);
  EBI_PolaritySet(ebiLineTFTHSync, ebiTFTInit->hsyncPolarity);

  /* Main control, EBI bank select, mask and blending configuration */
  ctrl = (uint32_t)ebiTFTInit->bank
         | (uint32_t)ebiTFTInit->width
         | (uint32_t)ebiTFTInit->colSrc
         | (uint32_t)ebiTFTInit->interleave
         | (uint32_t)ebiTFTInit->fbTrigger
         | (uint32_t)(ebiTFTInit->shiftDClk == true
                      ? (1 << _EBI_TFTCTRL_SHIFTDCLKEN_SHIFT) : 0)
         | (uint32_t)ebiTFTInit->maskBlend
         | (uint32_t)ebiTFTInit->driveMode;

  EBI->TFTCTRL = ctrl;

  /* Enable TFT pins */
  if (ebiTFTInit->driveMode != ebiTFTDDModeDisabled)
  {
    EBI->ROUTE |= EBI_ROUTE_TFTPEN;
  }
}


/***************************************************************************//**
 * @brief
 *   Configure and initialize TFT size settings
 *
 * @param[in] horizontal
 *   TFT display horizontal size in pixels
 * @param[in] vertical
 *   TFT display vertical size in pixels
 ******************************************************************************/
void EBI_TFTSizeSet(uint32_t horizontal, uint32_t vertical)
{
  EFM_ASSERT((horizontal-1) < 1024);
  EFM_ASSERT((vertical-1) < 1024);

  EBI->TFTSIZE = ((horizontal-1) << _EBI_TFTSIZE_HSZ_SHIFT)
                 | ((vertical-1) << _EBI_TFTSIZE_VSZ_SHIFT);
}

/***************************************************************************//**
 * @brief
 *   Configure and initialize Horizontal Porch Settings
 *
 * @param[in] front
 *   Horizontal front porch size in pixels
 * @param[in] back
 *   Horizontal back porch size in pixels
 * @param[in] pulseWidth
 *   Horizontal synchronization pulse width. Set to required -1.
 ******************************************************************************/
void EBI_TFTHPorchSet(int front, int back, int pulseWidth)
{
  EFM_ASSERT(front < 256);
  EFM_ASSERT(back < 256);
  EFM_ASSERT((pulseWidth-1) < 128);

  EBI->TFTHPORCH = (front << _EBI_TFTHPORCH_HFPORCH_SHIFT)
                   | (back << _EBI_TFTHPORCH_HBPORCH_SHIFT)
                   | ((pulseWidth-1) << _EBI_TFTHPORCH_HSYNC_SHIFT);
}


/***************************************************************************//**
 * @brief
 *   Configure Vertical Porch Settings
 *
 * @param[in] front
 *   Vertical front porch size in pixels
 * @param[in] back
 *   Vertical back porch size in pixels
 * @param[in] pulseWidth
 *   Vertical synchronization pulse width. Set to required -1.
 ******************************************************************************/
void EBI_TFTVPorchSet(int front, int back, int pulseWidth)
{
  EFM_ASSERT(front < 256);
  EFM_ASSERT(back < 256);
  EFM_ASSERT((pulseWidth-1) < 128);

  EBI->TFTVPORCH = (front << _EBI_TFTVPORCH_VFPORCH_SHIFT)
                   | (back << _EBI_TFTVPORCH_VBPORCH_SHIFT)
                   | ((pulseWidth-1) << _EBI_TFTVPORCH_VSYNC_SHIFT);
}


/***************************************************************************//**
 * @brief
 *   Configure TFT Direct Drive Timing Settings
 *
 * @param[in] dclkPeriod
 *   DCLK period in internal cycles
 *
 * @param[in] start
 *   Starting position of external direct drive, relative to DCLK inactive edge
 *
 * @param[in] setup
 *   Number of cycles RGB data is driven before active edge of DCLK
 *
 * @param[in] hold
 *   Number of cycles RGB data is held after active edge of DCLK
 ******************************************************************************/
void EBI_TFTTimingSet(int dclkPeriod, int start, int setup, int hold)
{
  EFM_ASSERT(dclkPeriod < 2048);
  EFM_ASSERT(start < 2048);
  EFM_ASSERT(setup < 4);
  EFM_ASSERT(hold < 4);

  EBI->TFTTIMING = (dclkPeriod << _EBI_TFTTIMING_DCLKPERIOD_SHIFT)
                   | (start << _EBI_TFTTIMING_TFTSTART_SHIFT)
                   | (setup << _EBI_TFTTIMING_TFTSETUP_SHIFT)
                   | (hold << _EBI_TFTTIMING_TFTHOLD_SHIFT);
}
#endif

#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
/***************************************************************************//**
 * @brief
 *   Configure read operation parameters for selected bank
 *
 * @param[in] banks
 *   Mask of memory bank(s) to configure write timing for
 *
 * @param[in] pageMode
 *   Enables or disables half cycle WE strobe in last strobe cycle
 *
 * @param[in] prefetch
 *   Enables or disables half cycle WE strobe in last strobe cycle
 *
 * @param[in] halfRE
 *   Enables or disables half cycle WE strobe in last strobe cycle
 ******************************************************************************/
void EBI_BankReadTimingConfig(uint32_t banks, bool pageMode, bool prefetch, bool halfRE)
{
 /* Verify only valid banks are used */
  EFM_ASSERT((banks & ~(EBI_BANK0 | EBI_BANK1 | EBI_BANK2 | EBI_BANK3)) == 0);

  /* Configure read operation parameters */
  if( banks & EBI_BANK0 )
  {
    BUS_RegBitWrite(&EBI->RDTIMING, _EBI_RDTIMING_PAGEMODE_SHIFT, pageMode);
    BUS_RegBitWrite(&EBI->RDTIMING, _EBI_RDTIMING_PREFETCH_SHIFT, prefetch);
    BUS_RegBitWrite(&EBI->RDTIMING, _EBI_RDTIMING_HALFRE_SHIFT, halfRE);
  }
  if( banks & EBI_BANK1 )
  {
    BUS_RegBitWrite(&EBI->RDTIMING1, _EBI_RDTIMING_PAGEMODE_SHIFT, pageMode);
    BUS_RegBitWrite(&EBI->RDTIMING1, _EBI_RDTIMING_PREFETCH_SHIFT, prefetch);
    BUS_RegBitWrite(&EBI->RDTIMING1, _EBI_RDTIMING_HALFRE_SHIFT, halfRE);
  }
  if( banks & EBI_BANK2 )
  {
    BUS_RegBitWrite(&EBI->RDTIMING2, _EBI_RDTIMING_PAGEMODE_SHIFT, pageMode);
    BUS_RegBitWrite(&EBI->RDTIMING2, _EBI_RDTIMING_PREFETCH_SHIFT, prefetch);
    BUS_RegBitWrite(&EBI->RDTIMING2, _EBI_RDTIMING_HALFRE_SHIFT, halfRE);
  }
  if( banks & EBI_BANK3 )
  {
    BUS_RegBitWrite(&EBI->RDTIMING3, _EBI_RDTIMING_PAGEMODE_SHIFT, pageMode);
    BUS_RegBitWrite(&EBI->RDTIMING3, _EBI_RDTIMING_PREFETCH_SHIFT, prefetch);
    BUS_RegBitWrite(&EBI->RDTIMING3, _EBI_RDTIMING_HALFRE_SHIFT, halfRE);
  }
}

/***************************************************************************//**
 * @brief
 *   Configure timing values of read bus accesses
 *
 * @param[in] banks
 *   Mask of memory bank(s) to configure timing for
 *
 * @param[in] setupCycles
 *   Number of clock cycles for address setup before REn is asserted
 *
 * @param[in] strobeCycles
 *   The number of cycles the REn is held active. After the specified number of
 *   cycles, data is read. If set to 0, 1 cycle is inserted by HW
 *
 * @param[in] holdCycles
 *   The number of cycles CSn is held active after the REn is dessarted
 ******************************************************************************/
void EBI_BankReadTimingSet(uint32_t banks, int setupCycles, int strobeCycles, int holdCycles)
{
  uint32_t readTiming;

  /* Verify only valid banks are used */
  EFM_ASSERT((banks & ~(EBI_BANK0 | EBI_BANK1 | EBI_BANK2 | EBI_BANK3)) == 0);

  /* Check that timings are within limits */
  EFM_ASSERT(setupCycles < 4);
  EFM_ASSERT(strobeCycles < 64);
  EFM_ASSERT(holdCycles < 4);

  /* Configure timing values */
  readTiming = (setupCycles << _EBI_RDTIMING_RDSETUP_SHIFT)
               | (strobeCycles << _EBI_RDTIMING_RDSTRB_SHIFT)
               | (holdCycles << _EBI_RDTIMING_RDHOLD_SHIFT);

  if (banks & EBI_BANK0)
  {
    EBI->RDTIMING = (EBI->RDTIMING
                     & ~(_EBI_RDTIMING_RDSETUP_MASK
                         | _EBI_RDTIMING_RDSTRB_MASK
                         | _EBI_RDTIMING_RDHOLD_MASK))
                    | readTiming;
  }
  if (banks & EBI_BANK1)
  {
    EBI->RDTIMING1 = (EBI->RDTIMING1
                      & ~(_EBI_RDTIMING1_RDSETUP_MASK
                           | _EBI_RDTIMING1_RDSTRB_MASK
                           | _EBI_RDTIMING1_RDHOLD_MASK))
                     | readTiming;
  }
  if (banks & EBI_BANK2)
  {
    EBI->RDTIMING2 = (EBI->RDTIMING2
                      & ~(_EBI_RDTIMING2_RDSETUP_MASK
                          | _EBI_RDTIMING2_RDSTRB_MASK
                          | _EBI_RDTIMING2_RDHOLD_MASK))
                     | readTiming;
  }
  if (banks & EBI_BANK3)
  {
    EBI->RDTIMING3 = (EBI->RDTIMING3
                      & ~(_EBI_RDTIMING3_RDSETUP_MASK
                          | _EBI_RDTIMING3_RDSTRB_MASK
                          | _EBI_RDTIMING3_RDHOLD_MASK))
                     | readTiming;
  }
}


/***************************************************************************//**
 * @brief
 *   Configure write operation parameters for selected bank
 *
 * @param[in] banks
 *   Mask of memory bank(s) to configure write timing for
 *
 * @param[in] writeBufDisable
 *   If true, disable the write buffer
 *
 * @param[in] halfWE
 *   Enables or disables half cycle WE strobe in last strobe cycle
 ******************************************************************************/
void EBI_BankWriteTimingConfig(uint32_t banks, bool writeBufDisable, bool halfWE)
{
  /* Verify only valid banks are used */
  EFM_ASSERT((banks & ~(EBI_BANK0 | EBI_BANK1 | EBI_BANK2 | EBI_BANK3)) == 0);

  /* Configure write operation parameters */
  if( banks & EBI_BANK0 )
  {
    BUS_RegBitWrite(&EBI->WRTIMING, _EBI_WRTIMING_WBUFDIS_SHIFT, writeBufDisable);
    BUS_RegBitWrite(&EBI->WRTIMING, _EBI_WRTIMING_HALFWE_SHIFT, halfWE);
  }
  if( banks & EBI_BANK1 )
  {
    BUS_RegBitWrite(&EBI->WRTIMING1, _EBI_WRTIMING_WBUFDIS_SHIFT, writeBufDisable);
    BUS_RegBitWrite(&EBI->WRTIMING1, _EBI_WRTIMING_HALFWE_SHIFT, halfWE);
  }
  if( banks & EBI_BANK2 )
  {
    BUS_RegBitWrite(&EBI->WRTIMING2, _EBI_WRTIMING_WBUFDIS_SHIFT, writeBufDisable);
    BUS_RegBitWrite(&EBI->WRTIMING2, _EBI_WRTIMING_HALFWE_SHIFT, halfWE);
  }
  if( banks & EBI_BANK3 )
  {
    BUS_RegBitWrite(&EBI->WRTIMING3, _EBI_WRTIMING_WBUFDIS_SHIFT, writeBufDisable);
    BUS_RegBitWrite(&EBI->WRTIMING3, _EBI_WRTIMING_HALFWE_SHIFT, halfWE);
  }
}


/***************************************************************************//**
 * @brief
 *   Configure timing values of write bus accesses
 *
 * @param[in] banks
 *   Mask of memory bank(s) to configure write timing for
 *
 * @param[in] setupCycles
 *   Number of clock cycles for address setup before WEn is asserted
 *
 * @param[in] strobeCycles
 *   Number of cycles WEn is held active. If set to 0, 1 cycle is inserted by HW
 *
 * @param[in] holdCycles
 *   Number of cycles CSn is held active after the WEn is deasserted
 ******************************************************************************/
void EBI_BankWriteTimingSet(uint32_t banks, int setupCycles, int strobeCycles, int holdCycles)
{
  uint32_t writeTiming;

  /* Verify only valid banks are used */
  EFM_ASSERT((banks & ~(EBI_BANK0 | EBI_BANK1 | EBI_BANK2 | EBI_BANK3)) == 0);

  /* Check that timings are within limits */
  EFM_ASSERT(setupCycles < 4);
  EFM_ASSERT(strobeCycles < 64);
  EFM_ASSERT(holdCycles < 4);

  /* Configure timing values */
  writeTiming = (setupCycles << _EBI_WRTIMING_WRSETUP_SHIFT)
                | (strobeCycles << _EBI_WRTIMING_WRSTRB_SHIFT)
                | (holdCycles << _EBI_WRTIMING_WRHOLD_SHIFT);

  if (banks & EBI_BANK0)
  {
    EBI->WRTIMING = (EBI->WRTIMING
                     & ~(_EBI_WRTIMING_WRSETUP_MASK
                         | _EBI_WRTIMING_WRSTRB_MASK
                         | _EBI_WRTIMING_WRHOLD_MASK))
                    | writeTiming;
  }
  if (banks & EBI_BANK1)
  {
    EBI->WRTIMING1 = (EBI->WRTIMING1
                      & ~(_EBI_WRTIMING1_WRSETUP_MASK
                          | _EBI_WRTIMING1_WRSTRB_MASK
                          | _EBI_WRTIMING1_WRHOLD_MASK))
                     | writeTiming;
  }
  if (banks & EBI_BANK2)
  {
    EBI->WRTIMING2 = (EBI->WRTIMING2
                      & ~(_EBI_WRTIMING2_WRSETUP_MASK
                          | _EBI_WRTIMING2_WRSTRB_MASK
                          | _EBI_WRTIMING2_WRHOLD_MASK))
                     | writeTiming;
  }
  if (banks & EBI_BANK3)
  {
    EBI->WRTIMING3 = (EBI->WRTIMING3
                      & ~(_EBI_WRTIMING3_WRSETUP_MASK
                          | _EBI_WRTIMING3_WRSTRB_MASK
                          | _EBI_WRTIMING3_WRHOLD_MASK))
                     | writeTiming;
  }
}


/***************************************************************************//**
 * @brief
 *   Configure address operation parameters for selected bank
 *
 * @param[in] banks
 *   Mask of memory bank(s) to configure write timing for
 *
 * @param[in] halfALE
 *   Enables or disables half cycle ALE strobe in last strobe cycle
 ******************************************************************************/
void EBI_BankAddressTimingConfig(uint32_t banks, bool halfALE)
{
  /* Verify only valid banks are used */
  EFM_ASSERT((banks & ~(EBI_BANK0 | EBI_BANK1 | EBI_BANK2 | EBI_BANK3)) == 0);

  if( banks & EBI_BANK0 )
  {
    BUS_RegBitWrite(&EBI->ADDRTIMING, _EBI_ADDRTIMING_HALFALE_SHIFT, halfALE);
  }
  if( banks & EBI_BANK1 )
  {
    BUS_RegBitWrite(&EBI->ADDRTIMING1, _EBI_ADDRTIMING_HALFALE_SHIFT, halfALE);
  }
  if( banks & EBI_BANK2 )
  {
    BUS_RegBitWrite(&EBI->ADDRTIMING2, _EBI_ADDRTIMING_HALFALE_SHIFT, halfALE);
  }
  if( banks & EBI_BANK3 )
  {
    BUS_RegBitWrite(&EBI->ADDRTIMING3, _EBI_ADDRTIMING_HALFALE_SHIFT, halfALE);
  }
}


/***************************************************************************//**
 * @brief
 *   Configure timing values of address latch bus accesses
 *
 * @param[in] banks
 *   Mask of memory bank(s) to configure address timing for
 *
 * @param[in] setupCycles
 *   Sets the number of cycles the address is held after ALE is asserted
 *
 * @param[in] holdCycles
 *   Sets the number of cycles the address is driven onto the ADDRDAT bus before
 *   ALE is asserted. If set 0, 1 cycle is inserted by HW
 ******************************************************************************/
void EBI_BankAddressTimingSet(uint32_t banks, int setupCycles, int holdCycles)
{
  uint32_t addressLatchTiming;

  /* Verify only valid banks are used */
  EFM_ASSERT((banks & ~(EBI_BANK0 | EBI_BANK1 | EBI_BANK2 | EBI_BANK3)) == 0);

  /* Check that timing values are within limits */
  EFM_ASSERT(setupCycles < 4);
  EFM_ASSERT(holdCycles < 4);

  /* Configure address latch timing values */
  addressLatchTiming = (setupCycles << _EBI_ADDRTIMING_ADDRSETUP_SHIFT)
                       | (holdCycles << _EBI_ADDRTIMING_ADDRHOLD_SHIFT);

  if (banks & EBI_BANK0)
  {
    EBI->ADDRTIMING = (EBI->ADDRTIMING
                       & ~(_EBI_ADDRTIMING_ADDRSETUP_MASK
                           | _EBI_ADDRTIMING_ADDRHOLD_MASK))
                      | addressLatchTiming;
  }
  if (banks & EBI_BANK1)
  {
    EBI->ADDRTIMING1 = (EBI->ADDRTIMING1
                        & ~(_EBI_ADDRTIMING1_ADDRSETUP_MASK
                            | _EBI_ADDRTIMING1_ADDRHOLD_MASK))
                       | addressLatchTiming;
  }
  if (banks & EBI_BANK2)
  {
    EBI->ADDRTIMING2 = (EBI->ADDRTIMING2
                        & ~(_EBI_ADDRTIMING2_ADDRSETUP_MASK
                            | _EBI_ADDRTIMING2_ADDRHOLD_MASK))
                       | addressLatchTiming;
  }
  if (banks & EBI_BANK3)
  {
    EBI->ADDRTIMING3 = (EBI->ADDRTIMING3
                        & ~(_EBI_ADDRTIMING3_ADDRSETUP_MASK
                            | _EBI_ADDRTIMING3_ADDRHOLD_MASK))
                       | addressLatchTiming;
  }
}


/***************************************************************************//**
 * @brief
 *   Configure EBI pin polarity for selected bank(s) for devices with individual
 *   timing support
 *
 * @param[in] banks
 *   Mask of memory bank(s) to configure polarity for
 *
 * @param[in] line
 *   Which pin/line to configure
 *
 * @param[in] polarity
 *   Active high, or active low
 ******************************************************************************/
void EBI_BankPolaritySet(uint32_t banks, EBI_Line_TypeDef line, EBI_Polarity_TypeDef polarity)
{
  uint32_t bankSet = 0;
  volatile uint32_t *polRegister = 0;

  /* Verify only valid banks are used */
  EFM_ASSERT((banks & ~(EBI_BANK0 | EBI_BANK1 | EBI_BANK2 | EBI_BANK3)) == 0);

  while (banks)
  {
#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
    if (banks & EBI_BANK0)
    {
      polRegister = &EBI->POLARITY;
      bankSet = EBI_BANK0;
    }
    if (banks & EBI_BANK1)
    {
      polRegister = &EBI->POLARITY1;
      bankSet = EBI_BANK1;
    }
    if (banks & EBI_BANK2)
    {
      polRegister = &EBI->POLARITY2;
      bankSet = EBI_BANK2;
    }
    if (banks & EBI_BANK3)
    {
      polRegister = &EBI->POLARITY3;
      bankSet = EBI_BANK3;
    }
#else
    polRegister = &EBI->POLARITY;
    banks       = 0;
#endif

    /* What line to configure */
    switch (line)
    {
      case ebiLineARDY:
        BUS_RegBitWrite(polRegister, _EBI_POLARITY_ARDYPOL_SHIFT, polarity);
        break;
      case ebiLineALE:
        BUS_RegBitWrite(polRegister, _EBI_POLARITY_ALEPOL_SHIFT, polarity);
        break;
      case ebiLineWE:
        BUS_RegBitWrite(polRegister, _EBI_POLARITY_WEPOL_SHIFT, polarity);
        break;
      case ebiLineRE:
        BUS_RegBitWrite(polRegister, _EBI_POLARITY_REPOL_SHIFT, polarity);
        break;
      case ebiLineCS:
        BUS_RegBitWrite(polRegister, _EBI_POLARITY_CSPOL_SHIFT, polarity);
        break;
#if defined(_EFM32_GIANT_FAMILY) || defined(_EFM32_WONDER_FAMILY)
      case ebiLineBL:
        BUS_RegBitWrite(polRegister, _EBI_POLARITY_BLPOL_SHIFT, polarity);
        break;
      case ebiLineTFTVSync:
        BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_VSYNCPOL_SHIFT, polarity);
        break;
      case ebiLineTFTHSync:
        BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_HSYNCPOL_SHIFT, polarity);
        break;
      case ebiLineTFTDataEn:
        BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_DATAENPOL_SHIFT, polarity);
        break;
      case ebiLineTFTDClk:
        BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_DCLKPOL_SHIFT, polarity);
        break;
      case ebiLineTFTCS:
        BUS_RegBitWrite(&(EBI->TFTPOLARITY), _EBI_TFTPOLARITY_CSPOL_SHIFT, polarity);
        break;
#endif
      default:
        EFM_ASSERT(0);
        break;
    }
    banks = banks & ~bankSet;
  }
}


/***************************************************************************//**
 * @brief
 *   Configure Byte Lane Enable for select banks
 *   timing support
 *
 * @param[in] banks
 *   Mask of memory bank(s) to configure polarity for
 *
 * @param[in] enable
 *   Flag
 ******************************************************************************/
void EBI_BankByteLaneEnable(uint32_t banks, bool enable)
{
  /* Verify only valid banks are used */
  EFM_ASSERT((banks & ~(EBI_BANK0 | EBI_BANK1 | EBI_BANK2 | EBI_BANK3)) == 0);

  /* Configure byte lane support for each selected bank */
  if (banks & EBI_BANK0)
  {
    BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_BL_SHIFT, enable);
  }
  if (banks & EBI_BANK1)
  {
    BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_BL1_SHIFT, enable);
  }
  if (banks & EBI_BANK2)
  {
    BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_BL2_SHIFT, enable);
  }
  if (banks & EBI_BANK3)
  {
    BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_BL3_SHIFT, enable);
  }
}


/***************************************************************************//**
 * @brief
 *   Configure Alternate Address Map support
 *   Enables or disables 256MB address range for all banks
 *
 * @param[in] enable
 *   Set or clear address map extension
 ******************************************************************************/
void EBI_AltMapEnable(bool enable)
{
  BUS_RegBitWrite(&(EBI->CTRL), _EBI_CTRL_ALTMAP_SHIFT, enable);
}

#endif

/** @} (end addtogroup EBI) */
/** @} (end addtogroup EM_Library) */

#endif /* defined(EBI_COUNT) && (EBI_COUNT > 0) */