363 lines
15 KiB
C
363 lines
15 KiB
C
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/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include "lcd.h"
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#include <board.h>
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#include <utility/assert.h>
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//------------------------------------------------------------------------------
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// Exported functions
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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/// Enables the LCD controller, after waiting for the specified number of
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/// frames.
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/// \param frames Number of frames before the LCD is enabled.
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//------------------------------------------------------------------------------
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void LCD_Enable(unsigned int frames)
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{
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ASSERT((frames & 0xFFFFFF80) == 0,
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"LCD_Enable: Wrong frames value.\n\r");
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AT91C_BASE_LCDC->LCDC_PWRCON = AT91C_LCDC_PWR | (frames << 1);
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}
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//------------------------------------------------------------------------------
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/// Disables the LCD controller, after waiting for the specified number of
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/// frames.
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/// \param frames Number of frames before the LCD is shut down.
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//------------------------------------------------------------------------------
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void LCD_Disable(unsigned int frames)
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{
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ASSERT((frames & 0xFFFFFF80) == 0,
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"LCD_Disable: Wrong frames value.\n\r");
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AT91C_BASE_LCDC->LCDC_PWRCON = frames << 1;
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}
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//------------------------------------------------------------------------------
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/// Enables the DMA of the LCD controller.
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//------------------------------------------------------------------------------
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void LCD_EnableDma()
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{
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AT91C_BASE_LCDC->LCDC_DMACON = AT91C_LCDC_DMAEN;
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}
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//------------------------------------------------------------------------------
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/// Disables the DMA of the LCD controller.
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//------------------------------------------------------------------------------
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void LCD_DisableDma()
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{
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AT91C_BASE_LCDC->LCDC_DMACON = 0;
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}
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//------------------------------------------------------------------------------
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/// Configures the internal clock of the LCD controller given the master clock of
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/// the system and the desired pixel clock in MHz.
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/// \param masterClock Master clock frequency.
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/// \param pixelClock Pixel clock frequency.
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//------------------------------------------------------------------------------
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void LCD_SetPixelClock(unsigned int masterClock, unsigned int pixelClock)
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{
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AT91C_BASE_LCDC->LCDC_LCDCON1 = ((masterClock / (2 * pixelClock)) - 1) << 12;
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}
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//------------------------------------------------------------------------------
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/// Sets the type of display used with the LCD controller.
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/// \param displayType Type of display used.
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//------------------------------------------------------------------------------
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void LCD_SetDisplayType(unsigned int displayType)
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{
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unsigned int value;
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ASSERT((displayType & ~AT91C_LCDC_DISTYPE) == 0,
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"LCD_SetDisplayType: Wrong display type value.\n\r");
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value = AT91C_BASE_LCDC->LCDC_LCDCON2;
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value &= ~AT91C_LCDC_DISTYPE;
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value |= displayType;
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AT91C_BASE_LCDC->LCDC_LCDCON2 = value;
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}
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//------------------------------------------------------------------------------
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/// Sets the scan mode used by the LCD (either single scan or double-scan).
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/// \param scanMode Scan mode to use.
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//------------------------------------------------------------------------------
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void LCD_SetScanMode(unsigned int scanMode)
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{
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unsigned int value;
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ASSERT((scanMode & ~AT91C_LCDC_SCANMOD) == 0,
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"LCD_SetScanMode: Wrong scan mode value.\n\r");
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value = AT91C_BASE_LCDC->LCDC_LCDCON2;
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value &= ~AT91C_LCDC_SCANMOD;
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value |= scanMode;
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AT91C_BASE_LCDC->LCDC_LCDCON2 = value;
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}
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//------------------------------------------------------------------------------
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/// Sets the number of bits per pixel used by the LCD display.
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/// \param bitsPerPixel Number of bits per pixel to use.
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//------------------------------------------------------------------------------
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void LCD_SetBitsPerPixel(unsigned int bitsPerPixel)
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{
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unsigned int value;
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ASSERT((bitsPerPixel & ~AT91C_LCDC_PIXELSIZE) == 0,
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"LCD_SetScanMode: Wrong bitsPerPixel value.\n\r");
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value = AT91C_BASE_LCDC->LCDC_LCDCON2;
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value &= ~AT91C_LCDC_PIXELSIZE;
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value |= bitsPerPixel;
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AT91C_BASE_LCDC->LCDC_LCDCON2 = value;
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}
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//------------------------------------------------------------------------------
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/// Sets the LCDD, LCDVSYNC, LCDHSYNC, LCDDOTCLK and LCDDEN signal polarities.
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/// \param lcdd LCDD signal polarity.
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/// \param lcdvsync LCDVSYNC signal polarity.
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/// \param lcdhsync LCDHSYNC signal polarity.
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/// \param lcddotclk LCDDOTCLK signal polarity.
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/// \param lcdden LCDDEN signal polarity.
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//------------------------------------------------------------------------------
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void LCD_SetPolarities(
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unsigned int lcdd,
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unsigned int lcdvsync,
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unsigned int lcdhsync,
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unsigned int lcddotclk,
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unsigned int lcdden)
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{
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unsigned int value;
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ASSERT((lcdd & ~AT91C_LCDC_INVVD) == 0,
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"LCD_SetPolarities: Wrong lcdd value.\n\r");
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ASSERT((lcdvsync & ~AT91C_LCDC_INVFRAME) == 0,
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"LCD_SetPolarities: Wrong lcdvsync value.\n\r");
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ASSERT((lcdhsync & ~AT91C_LCDC_INVLINE) == 0,
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"LCD_SetPolarities: Wrong lcdhsync value.\n\r");
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ASSERT((lcddotclk & ~AT91C_LCDC_INVCLK) == 0,
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"LCD_SetPolarities: Wrong lcddotclk value.\n\r");
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ASSERT((lcdden & ~AT91C_LCDC_INVDVAL) == 0,
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"LCD_SetPolarities: Wrong lcdden value.\n\r");
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value = AT91C_BASE_LCDC->LCDC_LCDCON2;
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value &= 0xFFFFE0FF;
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value |= lcdd | lcdvsync | lcdhsync | lcddotclk | lcdden;
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AT91C_BASE_LCDC->LCDC_LCDCON2 = value;
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}
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//------------------------------------------------------------------------------
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/// Sets the LCD clock mode, i.e. always active or active only during display
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/// period.
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/// \param clockMode Clock mode to use.
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//------------------------------------------------------------------------------
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void LCD_SetClockMode(unsigned int clockMode)
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{
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unsigned int value;
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ASSERT((clockMode & ~AT91C_LCDC_CLKMOD) == 0,
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"LCD_SetScanMode: Wrong scan mode value.\n\r");
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value = AT91C_BASE_LCDC->LCDC_LCDCON2;
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value &= ~AT91C_LCDC_CLKMOD;
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value |= clockMode;
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AT91C_BASE_LCDC->LCDC_LCDCON2 = value;
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}
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//------------------------------------------------------------------------------
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/// Sets the format of the frame buffer memory.
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/// \param format Memory ordering format.
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//------------------------------------------------------------------------------
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void LCD_SetMemoryFormat(unsigned int format)
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{
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unsigned int value;
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ASSERT((format & ~AT91C_LCDC_MEMOR) == 0,
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"LCD_SetMemoryFormat: Wrong memory format value.\n\r");
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value = AT91C_BASE_LCDC->LCDC_LCDCON2;
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value &= ~AT91C_LCDC_MEMOR;
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value |= format;
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AT91C_BASE_LCDC->LCDC_LCDCON2 = value;
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}
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//------------------------------------------------------------------------------
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/// Sets the size in pixel of the LCD display.
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/// \param width Width in pixel of the LCD display.
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/// \param height Height in pixel of the LCD display.
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//------------------------------------------------------------------------------
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void LCD_SetSize(unsigned int width, unsigned int height)
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{
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ASSERT(((width - 1) & 0xFFFFF800) == 0,
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"LCD_SetSize: Wrong width value.\n\r");
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ASSERT(((height - 1) & 0xFFFFF800) == 0,
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"LCD_SetSize: Wrong height value.\n\r");
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AT91C_BASE_LCDC->LCDC_LCDFRCFG = ((width - 1) << 21) | (height - 1);
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}
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//------------------------------------------------------------------------------
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/// Sets the vertical timings of the LCD controller. Only meaningful when
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/// using a TFT display.
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/// \param vfp Number of idle lines at the end of a frame.
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/// \param vbp Number of idle lines at the beginning of a frame.
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/// \param vpw Vertical synchronization pulse width in number of lines.
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/// \param vhdly Delay between LCDVSYNC edge and LCDHSYNC rising edge, in
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/// LCDDOTCLK cycles.
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//------------------------------------------------------------------------------
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void LCD_SetVerticalTimings(
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unsigned int vfp,
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unsigned int vbp,
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unsigned int vpw,
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unsigned int vhdly)
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{
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ASSERT((vfp & 0xFFFFFF00) == 0,
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"LCD_SetVerticalTimings: Wrong vfp value.\n\r");
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ASSERT((vbp & 0xFFFFFF00) == 0,
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"LCD_SetVerticalTimings: Wrong vbp value.\n\r");
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ASSERT(((vpw-1) & 0xFFFFFFC0) == 0,
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"LCD_SetVerticalTimings: Wrong vpw value.\n\r");
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ASSERT(((vhdly-1) & 0xFFFFFFF0) == 0,
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"LCD_SetVerticalTimings: Wrong vhdly value.\n\r");
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AT91C_BASE_LCDC->LCDC_TIM1 = vfp
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| (vbp << 8)
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| ((vpw-1) << 16)
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| ((vhdly-1) << 24);
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}
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//------------------------------------------------------------------------------
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/// Sets the horizontal timings of the LCD controller. Meaningful for both
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/// STN and TFT displays.
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/// \param hbp Number of idle LCDDOTCLK cycles at the beginning of a line.
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/// \param hpw Width of the LCDHSYNC pulse, in LCDDOTCLK cycles.
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/// \param hfp Number of idel LCDDOTCLK cycles at the end of a line.
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//------------------------------------------------------------------------------
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void LCD_SetHorizontalTimings(
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unsigned int hbp,
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unsigned int hpw,
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unsigned int hfp)
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{
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ASSERT(((hbp-1) & 0xFFFFFF00) == 0,
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"LCD_SetHorizontalTimings: Wrong hbp value.\n\r");
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ASSERT(((hpw-1) & 0xFFFFFFC0) == 0,
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"LCD_SetHorizontalTimings: Wrong hpw value.\n\r");
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ASSERT(((hfp-1) & 0xFFFFFF00) == 0,
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"LCD_SetHorizontalTimings: Wrong hfp value.\n\r");
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AT91C_BASE_LCDC->LCDC_TIM2 = (hbp-1) | ((hpw-1) << 8) | ((hfp-1) << 24);
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}
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//------------------------------------------------------------------------------
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/// Sets the address of the frame buffer in the LCD controller DMA. When using
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/// dual-scan mode, this is the upper frame buffer.
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/// \param address Frame buffer address.
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//------------------------------------------------------------------------------
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void LCD_SetFrameBufferAddress(void *address)
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{
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AT91C_BASE_LCDC->LCDC_BA1 = (unsigned int) address;
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}
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//------------------------------------------------------------------------------
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/// Sets the size in pixels of a frame (height * width * bpp).
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/// \param frameSize Size of frame in pixels.
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//------------------------------------------------------------------------------
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void LCD_SetFrameSize(unsigned int frameSize)
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{
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ASSERT((frameSize & 0xFF800000) == 0,
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"LCD_SetFrameSize: Wrong frameSize value.\n\r");
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AT91C_BASE_LCDC->LCDC_FRMCFG = frameSize | (AT91C_BASE_LCDC->LCDC_FRMCFG & 0xFF000000);
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}
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//------------------------------------------------------------------------------
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/// Sets the DMA controller burst length.
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/// \param burstLength Desired burst length.
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//------------------------------------------------------------------------------
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void LCD_SetBurstLength(unsigned int burstLength)
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{
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ASSERT(((burstLength-1) & 0xFFFFFF80) == 0,
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"LCD_SetBurstLength: Wrong burstLength value.\n\r");
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AT91C_BASE_LCDC->LCDC_FRMCFG &= 0x00FFFFFF;
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AT91C_BASE_LCDC->LCDC_FRMCFG |= ((burstLength-1) << 24);
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AT91C_BASE_LCDC->LCDC_FIFO = 2048 - (2 * burstLength + 3);
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}
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//------------------------------------------------------------------------------
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/// Sets the prescaler value of the contrast control PWM.
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/// \param prescaler Desired prescaler value.
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//------------------------------------------------------------------------------
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void LCD_SetContrastPrescaler(unsigned int prescaler)
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{
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ASSERT((prescaler & ~AT91C_LCDC_PS) == 0,
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"LCD_SetContrastPrescaler: Wrong prescaler value\n\r");
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AT91C_BASE_LCDC->LCDC_CTRSTCON &= ~AT91C_LCDC_PS;
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AT91C_BASE_LCDC->LCDC_CTRSTCON |= prescaler;
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}
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//------------------------------------------------------------------------------
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/// Sets the polarity of the contrast PWM.
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/// \param polarity PWM polarity
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//------------------------------------------------------------------------------
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void LCD_SetContrastPolarity(unsigned int polarity)
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{
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ASSERT((polarity & ~AT91C_LCDC_POL) == 0,
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"LCD_SetContrastPolarity: Wrong polarity value\n\r");
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AT91C_BASE_LCDC->LCDC_CTRSTCON &= ~AT91C_LCDC_POL;
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AT91C_BASE_LCDC->LCDC_CTRSTCON |= polarity;
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}
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//------------------------------------------------------------------------------
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/// Sets the threshold value of the constrast PWM.
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/// \param value PWM threshold value.
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//------------------------------------------------------------------------------
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void LCD_SetContrastValue(unsigned int value)
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{
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ASSERT((value & ~AT91C_LCDC_CVAL) == 0,
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"LCD_SetContrastValue: Wrong value.\n\r");
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AT91C_BASE_LCDC->LCDC_CTRSTVAL = value;
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}
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//------------------------------------------------------------------------------
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/// Enables the contrast PWM generator.
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//------------------------------------------------------------------------------
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void LCD_EnableContrast()
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{
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AT91C_BASE_LCDC->LCDC_CTRSTCON |= AT91C_LCDC_ENA_PWMGEMENABLED;
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}
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