From 044ad7c3987460ede48ff27afd6bdb0ca05a0432 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Mon, 4 Jul 2011 20:52:54 +0200 Subject: import at91lib from at91lib_20100901_softpack_1_9_v_1_0_svn_v15011 it's sad to see that atmel doesn't publish their svn repo or has a centralized location or even puts proper version/release info into the library itself --- drivers/lcd/lcdd.c | 138 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 138 insertions(+) create mode 100644 drivers/lcd/lcdd.c (limited to 'drivers/lcd/lcdd.c') diff --git a/drivers/lcd/lcdd.c b/drivers/lcd/lcdd.c new file mode 100644 index 0000000..efb14ed --- /dev/null +++ b/drivers/lcd/lcdd.c @@ -0,0 +1,138 @@ +/* ---------------------------------------------------------------------------- + * 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 +#include +#include + +//------------------------------------------------------------------------------ +// 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); +} -- cgit v1.2.3