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