193 lines
7.4 KiB
C
193 lines
7.4 KiB
C
/* ----------------------------------------------------------------------------
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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 "slcdc.h"
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#include <board.h>
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#include <utility/assert.h>
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#include <string.h>
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//------------------------------------------------------------------------------
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// Local definitions
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//------------------------------------------------------------------------------
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/// Size of SLCDC buffer in bytes.
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#define BUFFER_SIZE 320
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//------------------------------------------------------------------------------
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// Global functions
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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/// Initializes the Segment LCD controller.
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/// \param commons Number of commons used by the display.
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/// \param segments Number of segments used by the display.
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/// \param bias Bias value.
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/// \param timeSetting Buffer timing value.
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//------------------------------------------------------------------------------
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void SLCDC_Configure(
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unsigned int commons,
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unsigned int segments,
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unsigned int bias,
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unsigned int timeSetting)
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{
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SANITY_CHECK((commons > 0) && (commons <= 10));
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SANITY_CHECK((segments > 0) && (segments <= 40));
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SANITY_CHECK((bias & ~AT91C_SLCDC_BIAS) == 0);
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SANITY_CHECK((timeSetting & ~(0xF << 16)) == 0);
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SANITY_CHECK((timeSetting >> 16) < 0x0A);
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// Enable peripheral clock
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SLCD;
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AT91C_BASE_SLCDC->SLCDC_MR = (commons - 1) | ((segments - 1) << 8) | bias | timeSetting;
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}
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//------------------------------------------------------------------------------
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/// Clears the SLCD display buffer.
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//------------------------------------------------------------------------------
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void SLCDC_Clear(void)
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{
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memset((void *) AT91C_BASE_SLCDC->SLCDC_MEM, 0, BUFFER_SIZE);
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}
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//------------------------------------------------------------------------------
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/// Enables the SLCD controller.
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//------------------------------------------------------------------------------
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void SLCDC_Enable(void)
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{
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AT91C_BASE_SLCDC->SLCDC_CR = AT91C_SLCDC_LCDEN;
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while (AT91C_BASE_SLCDC -> SLCDC_SR != AT91C_SLCDC_ENA);
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}
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//------------------------------------------------------------------------------
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/// Disables the SLCD controller.
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//------------------------------------------------------------------------------
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void SLCDC_Disable(void)
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{
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AT91C_BASE_SLCDC->SLCDC_CR = AT91C_SLCDC_LCDDIS;
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}
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//------------------------------------------------------------------------------
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/// Enables the SLCD low power mode.
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//------------------------------------------------------------------------------
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void SLCDC_EnableLowPowerMode(void)
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{
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unsigned int value;
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value = AT91C_BASE_SLCDC->SLCDC_MR;
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value &= ~AT91C_SLCDC_LPMODE;
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value |=AT91C_SLCDC_LPMODE;
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AT91C_BASE_SLCDC->SLCDC_MR = value;
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}
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//------------------------------------------------------------------------------
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/// Disables the SLCD low power mode
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//------------------------------------------------------------------------------
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void SLCDC_DisableLowPowerMode(void)
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{
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unsigned int value;
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value = AT91C_BASE_SLCDC->SLCDC_MR;
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value &= ~AT91C_SLCDC_LPMODE;
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AT91C_BASE_SLCDC->SLCDC_MR = value;
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}
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//------------------------------------------------------------------------------
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/// Adjusts the frame frequency. Frequency = FsCLK / (prescaler * divider . NCOM)
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/// \param prescalerValue Prescaler value
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/// \param dividerValue Divider value
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//------------------------------------------------------------------------------
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void SLCDC_SetFrameFreq(unsigned int prescalerValue, unsigned int dividerValue)
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{
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SANITY_CHECK((prescalerValue & ~AT91C_SLCDC_PRESC) == 0);
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SANITY_CHECK((dividerValue & (~(0x07 << 8))) == 0);
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AT91C_BASE_SLCDC->SLCDC_FRR = prescalerValue | dividerValue;
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}
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//------------------------------------------------------------------------------
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/// Sets the display mode (normal/force off/force on/blinking).
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/// \param mode Display mode to be set
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//------------------------------------------------------------------------------
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void SLCDC_SetDisplayMode(unsigned int mode)
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{
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unsigned int value;
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SANITY_CHECK(mode < 8);
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value = AT91C_BASE_SLCDC->SLCDC_DR;
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value &= ~AT91C_SLCDC_DISPMODE;
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value |= mode;
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AT91C_BASE_SLCDC->SLCDC_DR = value;
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}
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//------------------------------------------------------------------------------
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/// Adjusts the display blinking frequency.
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/// Blinking frequency = Frame Frequency / LCDBLKFREQ.
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/// \param frequency Frequency value.
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//------------------------------------------------------------------------------
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void SLCDC_SetBlinkFreq(unsigned int frequency)
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{
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unsigned int value;
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SANITY_CHECK((frequency & ~(0xFF << 8)) == 0);
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value = AT91C_BASE_SLCDC->SLCDC_DR;
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value &= ~AT91C_SLCDC_BLKFREQ;
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value |= frequency;
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AT91C_BASE_SLCDC->SLCDC_DR = frequency;
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}
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//------------------------------------------------------------------------------
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/// Enables the selected SLCDC interrupt sources.
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/// \param sources Interrupt sources to enable.
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//------------------------------------------------------------------------------
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void SLCDC_EnableInterrupts(unsigned int sources)
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{
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SANITY_CHECK((sources & 0xFFFFFFFA) == 0);
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AT91C_BASE_SLCDC->SLCDC_IER = sources;
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}
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//------------------------------------------------------------------------------
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/// Disables the selected SLCDC interrupt sources.
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/// \param sources Interrupt sources to disable.
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//------------------------------------------------------------------------------
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void SLCDC_DisableInterrupts(unsigned int sources)
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{
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SANITY_CHECK((sources & 0xFFFFFFFA) == 0);
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AT91C_BASE_SLCDC->SLCDC_IDR = sources;
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}
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