diff options
Diffstat (limited to 'drivers/lcd/lcdd.c')
| -rw-r--r-- | drivers/lcd/lcdd.c | 138 |
1 files changed, 138 insertions, 0 deletions
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 <board.h>
+#include <lcd/lcd.h>
+#include <pio/pio.h>
+
+//------------------------------------------------------------------------------
+// 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);
+}
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