diff options
Diffstat (limited to 'peripherals/slcdc/slcdc.c')
| -rw-r--r-- | peripherals/slcdc/slcdc.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/peripherals/slcdc/slcdc.c b/peripherals/slcdc/slcdc.c new file mode 100644 index 0000000..59fc238 --- /dev/null +++ b/peripherals/slcdc/slcdc.c @@ -0,0 +1,192 @@ +/* ----------------------------------------------------------------------------
+ * 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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