Added SPI burst mode to spi 8 bit.
Dependents: Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG
Fork of UniGraphic by
Added SPI burst mode to this graphics driver. If whoever wants this rolled in to repository let me know. I replaced _spi.write(); with fastWrite(); and clearRX();
SPI8.cpp
// need to re-create SPI firmware to access SPI handle static SPI_HandleTypeDef SpiHandle; void SPI8::fastWrite(int data) { SpiHandle.Instance = SPI1; // Check if data is transmitted while ((SpiHandle.Instance->SR & SPI_SR_TXE) == 0); SpiHandle.Instance->DR = data; } void SPI8::clearRX( void ) { SpiHandle.Instance = SPI1; //Check if the RX buffer is busy //While busy, keep checking while (SpiHandle.Instance->SR & SPI_SR_BSY){ // Check RX buffer readable while ((SpiHandle.Instance->SR & SPI_SR_RXNE) == 0); int dummy = SpiHandle.Instance->DR; } }
Protocols/Protocols.h
- Committer:
- Geremia
- Date:
- 2015-02-20
- Revision:
- 11:b842b8e332cb
- Parent:
- 7:bb0383b91104
- Child:
- 20:14daa48ffd4c
File content as of revision 11:b842b8e332cb:
/* mbed UniGraphic library - Abstract protocol class * Copyright (c) 2015 Giuliano Dianda * Released under the MIT License: http://mbed.org/license/mit */ /** @file Protocols.h */ #ifndef Protocols_H #define Protocols_H #include "mbed.h" #define RGB24to16(r,g,b) (((r&0xF8)<<8)|((g&0xFC)<<3)|((b&0xF8)>>3)) //5 red | 6 green | 5 blue #define BGR2RGB(color) (((color&0x1F)<<11) | (color&0x7E0) | ((color&0xF800)>>11)) //#define USE_CS /** Protocol types */ enum proto_t { PAR_8 /**< Parallel 8bit, pins 0 to 7 */ ,PAR_16 /**< Parallel 16bit, pins 0 to 15 */ ,SPI_8 /**< SPI 8bit */ ,SPI_16 /**< SPI 16bit */ }; /** Abstract interface class for spi and parallel protocols */ class Protocols { public: /** Send 8bit command to display controller * * @param cmd: byte to send * */ virtual void wr_cmd8(unsigned char cmd) = 0; /** Send 8bit data to display controller * * @param data: byte to send * */ virtual void wr_data8(unsigned char data) = 0; /** Send 2x8bit command to display controller * * @param cmd: halfword to send * */ virtual void wr_cmd16(unsigned short cmd) = 0; /** Send 2x8bit data to display controller * * @param data: halfword to send * */ virtual void wr_data16(unsigned short data) = 0; /** Send 16bit pixeldata to display controller * * @param data: halfword to send * */ virtual void wr_gram(unsigned short data) = 0; /** Send same 16bit pixeldata to display controller multiple times * * @param data: halfword to send * @param count: how many * */ virtual void wr_gram(unsigned short data, unsigned int count) = 0; /** Send array of pixeldata shorts to display controller * * @param data: unsigned short pixeldata array * @param lenght: lenght (in shorts) * */ virtual void wr_grambuf(unsigned short* data, unsigned int lenght) = 0; /** Read 16bit pixeldata from display controller (with dummy cycle) * * @param convert true/false. Convert 18bit to 16bit, some controllers returns 18bit * @returns 16bit color */ virtual unsigned short rd_gram(bool convert) = 0; /** Read 4x8bit register data (with dummy cycle) * @param reg the register to read * @returns data as uint * */ virtual unsigned int rd_reg_data32(unsigned char reg) = 0; /** Read 3x8bit ExtendedCommands register data * @param reg the register to read * @param SPIreadenablecmd vendor/device specific cmd to read EXTC registers * @returns data as uint * @note EXTC regs (0xB0 to 0xFF) are read/write registers but needs special cmd to be read in SPI mode */ virtual unsigned int rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd) = 0; /** HW reset sequence (without display init commands) */ virtual void hw_reset() = 0; /** Set ChipSelect high or low * @param enable 0/1 */ virtual void BusEnable(bool enable) = 0; }; #endif