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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, 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:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* 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.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "lcdd.h"
#include <board.h>
#include <lcd/lcd.h>
#include <pio/pio.h>
//------------------------------------------------------------------------------
// Global functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Initializes the LCD controller using the board-specific parameters (stored
/// in the corresponding board.h). The LCD and DMA are not enabled by this
/// function; this is done during the first call to LCDD_DisplayBuffer.
//------------------------------------------------------------------------------
void LCDD_Initialize(void)
{
const Pin pPins[] = {PINS_LCD};
// Enable pins
PIO_Configure(pPins, PIO_LISTSIZE(pPins));
// Enable peripheral clock
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_LCDC;
#if defined(at91sam9g10)||defined(at91sam9261)
AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_HCK1;
#endif
// Disable the LCD and the DMA
LCD_DisableDma();
LCD_Disable(0);
// Configure the LCD controller
LCD_SetPixelClock(BOARD_MCK, BOARD_LCD_PIXELCLOCK);
LCD_SetDisplayType(BOARD_LCD_DISPLAYTYPE);
LCD_SetScanMode(AT91C_LCDC_SCANMOD_SINGLESCAN);
LCD_SetBitsPerPixel(BOARD_LCD_BPP);
LCD_SetPolarities(BOARD_LCD_POLARITY_INVVD,
BOARD_LCD_POLARITY_INVFRAME,
BOARD_LCD_POLARITY_INVLINE,
BOARD_LCD_POLARITY_INVCLK,
BOARD_LCD_POLARITY_INVDVAL);
LCD_SetClockMode(BOARD_LCD_CLOCKMODE);
LCD_SetMemoryFormat((unsigned int) AT91C_LCDC_MEMOR_LITTLEIND);
LCD_SetSize(BOARD_LCD_WIDTH, BOARD_LCD_HEIGHT);
// Configure timings
LCD_SetVerticalTimings(BOARD_LCD_TIMING_VFP,
BOARD_LCD_TIMING_VBP,
BOARD_LCD_TIMING_VPW,
BOARD_LCD_TIMING_VHDLY);
LCD_SetHorizontalTimings(BOARD_LCD_TIMING_HBP,
BOARD_LCD_TIMING_HPW,
BOARD_LCD_TIMING_HFP);
// Configure contrast (TODO functions)
LCD_SetContrastPrescaler(AT91C_LCDC_PS_NOTDIVIDED);
LCD_SetContrastPolarity(AT91C_LCDC_POL_POSITIVEPULSE);
LCD_SetContrastValue(0x80);
LCD_EnableContrast();
// Configure DMA
LCD_SetFrameSize(BOARD_LCD_FRAMESIZE);
LCD_SetBurstLength(4);
}
//------------------------------------------------------------------------------
/// Displays the contents of the provided buffer on the LCD. The buffer is
/// provided as-is to the LCD DMA and is not copied.
/// If the LCD and DMA are not yet enabled, this function enables them.
/// \param pBuffer Buffer to display.
/// \return The address of the previously displayed buffer.
//------------------------------------------------------------------------------
void * LCDD_DisplayBuffer(void *pBuffer)
{
void *pOldBuffer;
pOldBuffer = LCD_SetFrameBufferAddress(pBuffer);
// Enable LCD & DMA if needed
if ((AT91C_BASE_LCDC->LCDC_DMACON & AT91C_LCDC_DMAEN) != AT91C_LCDC_DMAEN) {
LCD_EnableDma();
LCD_Enable(0x0C);
}
return pOldBuffer;
}
//------------------------------------------------------------------------------
/// Shutdown the LCD
//------------------------------------------------------------------------------
void LCDD_Stop(void)
{
// Enable peripheral clock
AT91C_BASE_PMC->PMC_PCDR = 1 << AT91C_ID_LCDC;
#if defined(at91sam9g10)||defined(at91sam9261)
AT91C_BASE_PMC->PMC_SCDR = AT91C_PMC_HCK1;
#endif
// Disable the LCD and the DMA
LCD_DisableDma();
LCD_Disable(0);
}
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