ea6d73f140
1. Upgrade Cortex driver library (CMSIS -> CMSIS & Device): version 2.3.2 -> 3.0.1 & 3.0.0 - Remove "bsp/efm32/Libraries/CMSIS/Lib/ARM", "bsp/efm32/Libraries/CMSIS/Lib/G++" and "bsp/efm32/Libraries/CMSIS/SVD" to save space 2. Upgrade EFM32 driver libraries (efm32lib -> emlib): version 2.3.2 -> 3.0.0 - Remove "bsp/efm32/Libraries/Device/EnergyMicro/EFM32LG" and "bsp/efm32/Libraries/Device/EnergyMicro/EFM32TG" to save space 3. Upgrade EFM32GG_DK3750 development kit driver library: version 1.2.2 -> 2.0.1 4. Upgrade EFM32_Gxxx_DK development kit driver library: version 1.7.3 -> 2.0.1 5. Add energy management unit driver and test code 6. Modify linker script and related code to compatible with new version of libraries 7. Change EFM32 branch version number to 1.0 8. Add photo frame demo application git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2122 bbd45198-f89e-11dd-88c7-29a3b14d5316
204 lines
7.0 KiB
C
204 lines
7.0 KiB
C
/*************************************************************************//**
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* @file dmdif_ssd2119_ebi.c
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* @brief Dot matrix display SSD2119 interface using EBI
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* @author Energy Micro AS
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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 "dmd_ssd2119_registers.h"
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#include "dmd_ssd2119.h"
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#include "dmdif_ssd2119_spi.h"
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#include "dvk.h"
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/* Local function prototypes */
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static EMSTATUS setNextReg(uint8_t reg);
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static uint32_t command_register;
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static uint32_t data_register;
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/**************************************************************************//**
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* @brief
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* Initializes the data interface to the LCD controller SSD2119
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*
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*
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* @param cmdRegAddr
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* The address in memory where data to the command register in the display
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* controller are written
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* @param dataRegAddr
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* The address in memory where data to the data register in the display
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* controller are 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 DMDIF_init(uint32_t cmdRegAddr, uint32_t dataRegAddr)
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{
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command_register = cmdRegAddr;
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data_register = dataRegAddr;
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DVK_displayControl(DVK_Display_SPI);
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return DMD_OK;
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}
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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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setNextReg(reg);
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/* Write bits [15:8] of the data to bits [8:1] of the output lines */
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DVK_writeRegister( (uint16_t *) data_register, ((data & 0xff00) >> 8) << 1);
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/* Write bits [7:0] of the data to bits [8:1] of the output lines */
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DVK_writeRegister( (uint16_t *) data_register, (data & 0x00ff) << 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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* Reads the device code of the LCD controller
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* DOESN'T WORK
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*
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* @return
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* The device code of the LCD controller
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******************************************************************************/
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uint16_t DMDIF_readDeviceCode(void)
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{
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uint16_t readData;
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uint16_t deviceCode;
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/* Reading from the oscillation control register gives the device code */
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setNextReg(DMD_SSD2119_DEVICE_CODE_READ);
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readData = DVK_readRegister( (uint16_t *) data_register );
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deviceCode = ((readData >> 1) & 0x00ff) << 8;
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readData = DVK_readRegister( (uint16_t *) data_register );
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deviceCode |= ((readData >> 1) & 0x00ff);
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return deviceCode;
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}
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/**************************************************************************//**
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* @brief
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* Sends the data access command to the LCD controller to prepare for one or more
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* writes or reads using the DMDIF_writeData() and DMDIF_readData()
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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_prepareDataAccess(void)
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{
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setNextReg(DMD_SSD2119_ACCESS_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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* Writes one pixel to the LCD controller. DMDIF_prepareDataAccess() needs to be
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* called before writing data using this function.
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*
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* @param data
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* The color value of the pixel to be written in 18bpp format
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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_writeData(uint32_t data)
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{
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/* Write bits [17:9] of the pixel data to bits [8:0] on the output lines */
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DVK_writeRegister( (uint16_t *) data_register, (data & 0x0003FE00) >> 9);
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/* Write bits [8:0] of the pixel data to bits [8:0] on the output lines */
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DVK_writeRegister( (uint16_t *) data_register, (data & 0x000001FF));
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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 a byte of data from the memory of the LCD controller.
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* DMDIF_prepareDataAccess() needs to be called before using this function.
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* DOESN'T WORK
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*
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* @return
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* 18bpp value of pixel
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******************************************************************************/
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uint32_t DMDIF_readData(void)
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{
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uint32_t data;
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/* Read bits [17:9] of the pixel */
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data = DVK__readRegister( (uint16_t *) data_register ) << 9;
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/* Read bits [8:0] of the pixel */
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data |= DVK_readRegister( (uint16_t *) data_register );
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return data;
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}
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/**************************************************************************//**
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* \brief
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* Sets the register in the LCD controller to write commands to
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*
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* \param reg
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* The next register in the LCD controller to write to
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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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static EMSTATUS setNextReg(uint8_t reg)
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{
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uint16_t data;
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data = ((uint16_t) reg) << 1;
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/* First 9 bits is 0 */
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DVK_writeRegister( (uint16_t *) command_register, 0 );
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/* Write the register address to bits [8:1] in the index register */
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DVK_writeRegister( (uint16_t *) command_register, data );
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return DMD_OK;
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}
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