530 lines
16 KiB
C
530 lines
16 KiB
C
/***************************************************************************//**
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* @file
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* @brief Dot matrix display Direct Driver for TFT SSD2119 "Generic" mode
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* @author Energy Micro AS
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* @version 2.0.1
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>
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*******************************************************************************
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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* 4. The source and compiled code may only be used on Energy Micro "EFM32"
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* microcontrollers and "EFR4" radios.
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*
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* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
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* obligation to support this Software. Energy Micro AS is providing the
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* Software "AS IS", with no express or implied warranties of any kind,
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* including, but not limited to, any implied warranties of merchantability
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* or fitness for any particular purpose or warranties against infringement
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* of any proprietary rights of a third party.
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*
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* Energy Micro AS will not be liable for any consequential, incidental, or
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* special damages, or any other relief, or for any claim by any third party,
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* arising from your use of this Software.
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*
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*****************************************************************************/
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#include <stdint.h>
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#include "graphics/em_types.h"
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#include "dmdif_ssd2119_ebi.h"
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#include "dmd_ssd2119_registers.h"
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#include "dmd_ssd2119.h"
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#include "efm32.h"
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#include "em_usart.h"
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#include "em_cmu.h"
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#include "em_gpio.h"
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#include "tftspi.h"
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/** Dimensions of the display */
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DMD_DisplayGeometry dimensions =
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{
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.xSize = 320,
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.ySize = 240,
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.xClipStart = 0,
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.yClipStart = 0,
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.clipWidth = 320,
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.clipHeight = 240,
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};
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/** FramePointer base address */
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static volatile uint16_t *frameBuffer;
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/* Local variables */
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static uint32_t initialized = 0;
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static uint16_t rcDriverOutputControl = 0;
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/* Local function prototypes */
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static uint16_t colorTransform24ToRGB565(uint8_t red, uint8_t green, uint8_t blue);
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#if 0
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static void colorTransformRGB565To24bpp(uint16_t color, uint8_t *red, uint8_t *green, uint8_t *blue);
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#endif
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/**************************************************************************//**
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* @brief
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* Transforms a 24bpp pixel data into an RGB565 pixel
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*
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* @param red
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* 8-bit red component of the pixel
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* @param green
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* 8-bit green component of the pixel
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* @param blue
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* 8-bit blue component of the pixel
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* @return
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* 16-bit RGB565 value of pixel
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******************************************************************************/
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static uint16_t colorTransform24ToRGB565(uint8_t red, uint8_t green, uint8_t blue)
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{
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/* Transform each color into 6 bits by dropping the 2 LSB */
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red = red >> 3;
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green = green >> 2;
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blue = blue >> 3;
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/* Put it together to one 18bpp color number */
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return (red << 11) | (green << 5) | blue;
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}
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/**************************************************************************//**
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* @brief
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* Transforms an 16-bit RGB565 pixel into a 24bpp pixel
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*
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* @param[in] color
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* RGB565 16-bit color pixel
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* @param red
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* return value for red component of 24bpp pixel
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* @param green
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* return value for green component of 24bpp pixel
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* @param blue
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* return value for blue component of 24bpp pixel
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******************************************************************************/
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#if 0
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static void colorTransformRGB565To24bpp(uint16_t color, uint8_t *red,
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uint8_t *green, uint8_t *blue)
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{
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/* Get the individual colors out of the 18bpp number */
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uint8_t redValue = (color & 0x0003F000) >> 12;
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uint8_t greenValue = (color & 0x00000FC0) >> 6;
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uint8_t blueValue = (color & 0x0000003F);
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/* Convert each color to 8-bit */
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redValue <<= 2;
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greenValue <<= 2;
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blueValue <<= 2;
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*red = redValue;
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*green = greenValue;
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*blue = blueValue;
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return;
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}
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#endif
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/**************************************************************************//**
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* @brief
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* Writes a value to a control register in the LCD controller
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*
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* @param reg
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* The register that will be written to
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* @param data
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* The value to write to the register
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*
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* @return
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* DMD_OK on success, otherwise error code
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******************************************************************************/
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EMSTATUS DMDIF_writeReg(uint8_t reg, uint16_t data)
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{
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SPI_TFT_WriteRegister(reg, data);
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return DMD_OK;
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}
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/**************************************************************************//**
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* @brief
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* Initializes the LCD display
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*
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* @param cmdRegAddr
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* If set to 0, initialize SSD2119 for direct drive, if set to 1 update
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* frame buffer base pointer (offset to EBI bank) only
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* @param dataRegAddr
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* Address in memory for frame buffer base pointer
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*
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* @return
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* DMD_OK on success, otherwise error code
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******************************************************************************/
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EMSTATUS DMD_init(uint32_t cmdRegAddr, uint32_t dataRegAddr)
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{
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uint16_t data;
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volatile uint32_t i;
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(void) cmdRegAddr;
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(void) dataRegAddr;
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/* Use data reg addr as pointer to frame buffer */
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frameBuffer = (uint16_t *) dataRegAddr;
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if(cmdRegAddr==1) return DMD_OK;
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SPI_TFT_Init();
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DMDIF_writeReg(DMD_SSD2119_VCOM_OTP_1, 0x0006);
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/* Oscillation driven DCLK */
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#if 0
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data = DMD_SSD2119_OSCILLATION_START_OSCEN;
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DMDIF_writeReg(DMD_SSD2119_OSCILLATION_START, data);
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#endif
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/* Display control */
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data = 0;
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// data |= DMD_SSD2119_DISPLAY_CONTROL_DTE;
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data |= DMD_SSD2119_DISPLAY_CONTROL_GON;
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data |= DMD_SSD2119_DISPLAY_CONTROL_D1;
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data |= DMD_SSD2119_DISPLAY_CONTROL_D0;
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DMDIF_writeReg(DMD_SSD2119_DISPLAY_CONTROL, data);
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/* Exit sleep mode */
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data = 0;
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DMDIF_writeReg(DMD_SSD2119_SLEEP_MODE_1, data);
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/* Wait */
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for (i = 0; i < 100000; i++);
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/* Display control */
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DMDIF_writeReg(DMD_SSD2119_DISPLAY_CONTROL, 0x33);
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/* Entry mode */
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data = DMD_SSD2119_ENTRY_MODE_DFM_65K << DMD_SSD2119_ENTRY_MODE_DFM_SHIFT;
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data |= DMD_SSD2119_ENTRY_MODE_WMODE;
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data |= DMD_SSD2119_ENTRY_MODE_NOSYNC;
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data |= DMD_SSD2119_ENTRY_MODE_DMODE;
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data |= DMD_SSD2119_ENTRY_MODE_ID1;
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data |= DMD_SSD2119_ENTRY_MODE_ID0;
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DMDIF_writeReg(DMD_SSD2119_ENTRY_MODE, data);
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// DMDIF_writeReg(DMD_SSD2119_DRIVER_OUTPUT_CONTROL, 0x3aef);
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/* Generic Interface Control */
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// data = DMD_SSD2119_GENERIC_INTERFACE_CONTROL_INVDEN;
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// DMDIF_writeReg(DMD_SSD2119_GENERIC_INTERFACE_CONTROL, data);
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/* Driver output control */
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data = 0;
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data |= DMD_SSD2119_DRIVER_OUTPUT_CONTROL_REV;
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data |= DMD_SSD2119_DRIVER_OUTPUT_CONTROL_GD;
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// data |= DMD_SSD2119_DRIVER_OUTPUT_CONTROL_TB;
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// data |= DMD_SSD2119_DRIVER_OUTPUT_CONTROL_SM;
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// data |= DMD_SSD2119_DRIVER_OUTPUT_CONTROL_RL;
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data |= ((DMD_VERTICAL_SIZE - 1) << DMD_SSD2119_DRIVER_OUTPUT_CONTROL_MUX_SHIFT);
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DMDIF_writeReg(DMD_SSD2119_DRIVER_OUTPUT_CONTROL, data);
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/* LCD AC control */
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data = DMD_SSD2119_LCD_AC_CONTROL_BC;
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data |= DMD_SSD2119_LCD_AC_CONTROL_EOR;
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/* data |= DMD_SSD2119_LCD_AC_CONTROL_FLC; */
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DMDIF_writeReg(DMD_SSD2119_LCD_AC_CONTROL, data);
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/* RAM data write */
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data = 0xff;
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DMDIF_writeReg(DMD_SSD2119_ACCESS_DATA, data);
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/* Mark graphics as initialized */
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initialized = 1;
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return DMD_OK;
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}
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/**************************************************************************//**
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* @brief
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* Get the dimensions of the display and of the current clipping area
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*
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* @return
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* DMD_Dimensions structure containing the size of the display and the
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* clipping area
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******************************************************************************/
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EMSTATUS DMD_getDisplayGeometry(DMD_DisplayGeometry **geometry)
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{
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if (!initialized)
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{
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return DMD_ERROR_DRIVER_NOT_INITIALIZED;
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}
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*geometry = &dimensions;
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return DMD_OK;
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}
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/**************************************************************************//**
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* @brief
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* Sets the clipping area. All coordinates given to writeData/writeColor/readData
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* are relative to this clipping area.
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*
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* @param xStart
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* X coordinate of the upper left corner of the clipping area
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* @param yStart
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* Y coordinate of the upper left corner of the clipping area
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* @param width
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* Width of the clipping area
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* @param height
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* Height of the clipping area
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*
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* @return
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* DMD_OK on success, otherwise error code
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******************************************************************************/
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EMSTATUS DMD_setClippingArea(uint16_t xStart, uint16_t yStart,
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uint16_t width, uint16_t height)
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{
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if (!initialized)
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{
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return DMD_ERROR_DRIVER_NOT_INITIALIZED;
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}
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/* Check parameters */
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if (xStart + width > dimensions.xSize ||
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yStart + height > dimensions.ySize)
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{
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return DMD_ERROR_PIXEL_OUT_OF_BOUNDS;
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}
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if (width == 0 || height == 0)
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{
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return DMD_ERROR_EMPTY_CLIPPING_AREA;
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}
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/* Update the dimensions structure */
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dimensions.xClipStart = xStart;
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dimensions.yClipStart = yStart;
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dimensions.clipWidth = width;
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dimensions.clipHeight = height;
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return DMD_OK;
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}
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/**************************************************************************//**
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* @brief
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* Draws pixels to the display
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*
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* @param x
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* X coordinate of the first pixel to be written, relative to the clipping area
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* @param y
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* Y coordinate of the first pixel to be written, relative to the clipping area
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* @param data
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* Array containing the pixel data. Each 8-bit element in the array are one color
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* component of the pixel, so that 3 bytes represent one pixel. The pixels are
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* ordered by increasing x coordinate, after the last pixel of a row, the next
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* pixel will be the first pixel on the next row.
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* @param numPixels
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* Number of pixels to be written
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*
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* @return
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* DMD_OK on success, otherwise error code
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******************************************************************************/
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EMSTATUS DMD_writeData(uint16_t x, uint16_t y, const uint8_t data[],
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uint32_t numPixels)
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{
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uint8_t *dest = (uint8_t *)((uint32_t) frameBuffer +
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(uint32_t) (y*dimensions.xSize*sizeof(uint16_t)) +
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(uint32_t) (x*sizeof(uint16_t)));
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while(numPixels--)
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{
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*dest++ = *data++;
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}
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return DMD_OK;
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}
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/**************************************************************************//**
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* @brief
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* Reads data from display memory
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* DOESN'T WORK yet - TIMING ISSUE?
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*
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* @param x
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* X coordinate of the first pixel to be read, relative to the clipping area
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* @param y
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* Y coordinate of the first pixel to be read, relative to the clipping area
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* @param data
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* Pointer to where the pixel data will be stored
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* @param numPixels
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* Number of pixels to be read
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*
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* @return
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* DMD_OK on success, otherwise error code
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******************************************************************************/
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EMSTATUS DMD_readData(uint16_t x, uint16_t y,
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uint8_t data[], uint32_t numPixels)
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{
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uint8_t *source = (uint8_t *)((uint32_t) frameBuffer +
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(uint32_t) (y*dimensions.xSize*sizeof(uint16_t)) +
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(uint32_t) (x*sizeof(uint16_t)));
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if (y > dimensions.ySize) return DMD_ERROR_PIXEL_OUT_OF_BOUNDS;
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while(numPixels--)
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{
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*data++ = *source++;
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}
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return DMD_OK;
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}
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/**************************************************************************//**
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* \brief
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* Draws a number of pixels of the same color to the display
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*
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* @param x
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* X coordinate of the first pixel to be written, relative to the clipping area
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* @param y
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* Y coordinate of the first pixel to be written, relative to the clipping area
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* @param red
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* Red component of the color
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* @param green
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* Green component of the color
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* @param blue
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* Blue component of the color
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* @param numPixels
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* Number of pixels to be written
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*
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* @return
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* DMD_OK on success, otherwise error code
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******************************************************************************/
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EMSTATUS DMD_writeColor(uint16_t x, uint16_t y,
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uint8_t red, uint8_t green, uint8_t blue, uint32_t numPixels)
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{
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uint16_t color;
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uint16_t xStart = x;
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uint16_t *pixelPointer = (uint16_t *)
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((uint32_t) frameBuffer +
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(uint32_t) ((y+dimensions.yClipStart)*dimensions.xSize*sizeof(uint16_t)) +
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(uint32_t) ((x+dimensions.xClipStart)*sizeof(uint16_t)));
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color = colorTransform24ToRGB565(red,green,blue);
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/* Draw the requied number of pixels */
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while(numPixels--)
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{
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x++;
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*pixelPointer++ = color;
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/* Increment line, start at the right x position inside clipping region */
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if (x>=dimensions.clipWidth)
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{
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x = xStart;
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pixelPointer = (uint16_t *)
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((uint32_t) frameBuffer +
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(uint32_t) (((++y)+dimensions.yClipStart)*dimensions.xSize*sizeof(uint16_t)) +
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(uint32_t) ((xStart+dimensions.xClipStart)*sizeof(uint16_t)));
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}
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}
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return DMD_OK;
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}
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/**************************************************************************//**
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* @brief
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* Turns off the display and puts it into sleep mode
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* Does not turn off backlight
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*
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* @return
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* DMD_OK on success, otherwise error code
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******************************************************************************/
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EMSTATUS DMD_sleep(void)
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{
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uint16_t data;
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if (!initialized)
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{
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return DMD_ERROR_DRIVER_NOT_INITIALIZED;
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}
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/* Put into sleep mode */
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data = DMD_SSD2119_SLEEP_MODE_1_SLP;
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DMDIF_writeReg(DMD_SSD2119_SLEEP_MODE_1, data);
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/* Turn off display */
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data = 0;
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DMDIF_writeReg(DMD_SSD2119_DISPLAY_CONTROL, 0x0000);
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/* Delay 1.5 frame */
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/*DMDIF_delay((1000 / DMD_FRAME_FREQUENCY) * 3 / 2);*/
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return DMD_OK;
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}
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/**************************************************************************//**
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* @brief
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* Wakes up the display from sleep mode
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*
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* @return
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* DMD_OK on success, otherwise error code
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******************************************************************************/
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EMSTATUS DMD_wakeUp(void)
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{
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uint16_t data;
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if (!initialized)
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{
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return DMD_ERROR_DRIVER_NOT_INITIALIZED;
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}
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/* Get out of sleep mode */
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data = 0;
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DMDIF_writeReg(DMD_SSD2119_SLEEP_MODE_1, data);
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/* Turn on display */
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data = DMD_SSD2119_DISPLAY_CONTROL_DTE;
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data |= DMD_SSD2119_DISPLAY_CONTROL_GON;
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data |= DMD_SSD2119_DISPLAY_CONTROL_D1;
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data |= DMD_SSD2119_DISPLAY_CONTROL_D0;
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DMDIF_writeReg(DMD_SSD2119_DISPLAY_CONTROL, data);
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/* Delay 10 frames */
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/*DMDIF_delay((1000 / DMD_FRAME_FREQUENCY) * 10);*/
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return DMD_OK;
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}
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/**************************************************************************//**
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* @brief
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* Set horizontal and vertical flip mode of display controller
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*
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* @param hor
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* Set to flip display horizontally
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*
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* @param ver
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* Set to flip display vertically
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*
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* @return
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* Returns DMD_OK is successful, error otherwise.
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******************************************************************************/
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EMSTATUS DMD_flipDisplay(int horizontal, int vertical)
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{
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uint16_t reg;
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reg = rcDriverOutputControl;
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if (horizontal) reg &= ~DMD_SSD2119_DRIVER_OUTPUT_CONTROL_RL;
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else reg |= DMD_SSD2119_DRIVER_OUTPUT_CONTROL_RL;
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if (vertical) reg &= ~DMD_SSD2119_DRIVER_OUTPUT_CONTROL_TB;
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else reg |= DMD_SSD2119_DRIVER_OUTPUT_CONTROL_TB;
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|
|
rcDriverOutputControl = reg;
|
|
DMDIF_writeReg(DMD_SSD2119_DRIVER_OUTPUT_CONTROL, rcDriverOutputControl);
|
|
|
|
return DMD_OK;
|
|
}
|