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/**************************************************************************//**
* @file ebi.c
* @version V3.00
* $Revision: 3 $
* $Date: 14/01/28 10:49a $
* @brief M051 series EBI driver source file
*
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "M051Series.h"
/** @addtogroup M051_Device_Driver M051 Device Driver
@{
*/
/** @addtogroup M051_EBI_Driver EBI Driver
@{
*/
/** @addtogroup M051_EBI_EXPORTED_FUNCTIONS EBI Exported Functions
@{
*/
/**
* @brief Initialize EBI function
*
* @param[in] u32Bank Bank number for EBI. This parameter is current not used.
* @param[in] u32DataWidth Data bus width. Valid values are:
* - \ref EBI_BUSWIDTH_8BIT
* - \ref EBI_BUSWIDTH_16BIT
* @param[in] u32TimingClass Default timing configuration. Valid values are:
* - \ref EBI_TIMING_FASTEST
* - \ref EBI_TIMING_VERYFAST
* - \ref EBI_TIMING_FAST
* - \ref EBI_TIMING_NORMAL
* - \ref EBI_TIMING_SLOW
* - \ref EBI_TIMING_VERYSLOW
* - \ref EBI_TIMING_SLOWEST
* @param[in] u32BusMode Enable EBI separate mode. This parameter is current not used.
* @param[in] u32CSActiveLevel CS is active High/Low. This parameter is current not used.
*
* @return none
*
* @details This function make EBI module be ready for read and write operation.
* @note Only u32DataWidth and u32TimingClass is valid in M051 series.
*/
void EBI_Open(uint32_t u32Bank, uint32_t u32DataWidth, uint32_t u32TimingClass, uint32_t u32BusMode, uint32_t u32CSActiveLevel)
{
if(u32DataWidth == EBI_BUSWIDTH_8BIT)
EBI->EBICON &= ~EBI_EBICON_ExtBW16_Msk;
else
EBI->EBICON |= EBI_EBICON_ExtBW16_Msk;
switch(u32TimingClass)
{
case EBI_TIMING_FASTEST:
EBI->EBICON = (EBI->EBICON & ~(EBI_EBICON_MCLKDIV_Msk | EBI_EBICON_ExttALE_Msk)) |
(EBI_MCLKDIV_1 << EBI_EBICON_MCLKDIV_Pos) | EBI_EBICON_ExtEN_Msk;
EBI->EXTIME = 0x0;
break;
case EBI_TIMING_VERYFAST:
EBI->EBICON = (EBI->EBICON & ~(EBI_EBICON_MCLKDIV_Msk | EBI_EBICON_ExttALE_Msk)) |
(EBI_MCLKDIV_1 << EBI_EBICON_MCLKDIV_Pos) | EBI_EBICON_ExtEN_Msk |
(0x3 << EBI_EBICON_ExttALE_Pos) ;
EBI->EXTIME = 0x03003318;
break;
case EBI_TIMING_FAST:
EBI->EBICON = (EBI->EBICON & ~(EBI_EBICON_MCLKDIV_Msk | EBI_EBICON_ExttALE_Msk)) |
(EBI_MCLKDIV_2 << EBI_EBICON_MCLKDIV_Pos) | EBI_EBICON_ExtEN_Msk;
EBI->EXTIME = 0x0;
break;
case EBI_TIMING_NORMAL:
EBI->EBICON = (EBI->EBICON & ~(EBI_EBICON_MCLKDIV_Msk | EBI_EBICON_ExttALE_Msk)) |
(EBI_MCLKDIV_2 << EBI_EBICON_MCLKDIV_Pos) | EBI_EBICON_ExtEN_Msk |
(0x3 << EBI_EBICON_ExttALE_Pos) ;
EBI->EXTIME = 0x03003318;
break;
case EBI_TIMING_SLOW:
EBI->EBICON = (EBI->EBICON & ~(EBI_EBICON_MCLKDIV_Msk | EBI_EBICON_ExttALE_Msk)) |
(EBI_MCLKDIV_2 << EBI_EBICON_MCLKDIV_Pos) | EBI_EBICON_ExtEN_Msk |
(0x7 << EBI_EBICON_ExttALE_Pos) ;
EBI->EXTIME = 0x07007738;
break;
case EBI_TIMING_VERYSLOW:
EBI->EBICON = (EBI->EBICON & ~(EBI_EBICON_MCLKDIV_Msk | EBI_EBICON_ExttALE_Msk)) |
(EBI_MCLKDIV_4 << EBI_EBICON_MCLKDIV_Pos) | EBI_EBICON_ExtEN_Msk |
(0x7 << EBI_EBICON_ExttALE_Pos) ;
EBI->EXTIME = 0x07007738;
break;
case EBI_TIMING_SLOWEST:
EBI->EBICON = (EBI->EBICON & ~(EBI_EBICON_MCLKDIV_Msk | EBI_EBICON_ExttALE_Msk)) |
(EBI_MCLKDIV_8 << EBI_EBICON_MCLKDIV_Pos) | EBI_EBICON_ExtEN_Msk |
(0x7 << EBI_EBICON_ExttALE_Pos) ;
EBI->EXTIME = 0x07007738;
break;
default:
EBI->EBICON &= ~EBI_EBICON_ExtEN_Msk;
break;
}
}
/**
* @brief Disable EBI function
*
* @param[in] u32Bank Bank number for EBI. This parameter is current not used.
*
* @return none
*
* @details This function close EBI module.
*/
void EBI_Close(uint32_t u32Bank)
{
EBI->EBICON &= ~EBI_EBICON_ExtEN_Msk;
}
/**
* @brief Set EBI bus timings
*
* @param[in] u32Bank Bank number for EBI. This parameter is current not used.
*
* @param[in] u32TimingConfig Configure EBI timing settings, ExttACC, ExttAHD, ExtIW2X and ExtIR2R.
* @param[in] u32MclkDiv Divider for MCLK. Valid values are:
* - \ref EBI_MCLKDIV_1
* - \ref EBI_MCLKDIV_2
* - \ref EBI_MCLKDIV_4
* - \ref EBI_MCLKDIV_8
* - \ref EBI_MCLKDIV_16
* - \ref EBI_MCLKDIV_32
*
* @return none
*
* @details This function make EBI module be ready for read and write operation.
*/
void EBI_SetBusTiming(uint32_t u32Bank, uint32_t u32TimingConfig, uint32_t u32MclkDiv)
{
EBI->EBICON = (EBI->EBICON & ~EBI_EBICON_MCLKDIV_Msk) | (u32MclkDiv << EBI_EBICON_MCLKDIV_Pos);
EBI->EXTIME = u32TimingConfig;
}
/*@}*/ /* end of group M051_EBI_EXPORTED_FUNCTIONS */
/*@}*/ /* end of group M051_EBI_Driver */
/*@}*/ /* end of group M051_Device_Driver */
/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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