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/PAR8.h
- Committer:
- dreschpe
- Date:
- 2015-10-18
- Revision:
- 25:daacdcf34e52
- Parent:
- 20:14daa48ffd4c
- Child:
- 27:acb2594b8aa4
File content as of revision 25:daacdcf34e52:
#if DEVICE_PORTINOUT #ifndef PAR8_H #define PAR8_H #include "mbed.h" #include "Protocols.h" //#include "GraphicsDisplay.h" /** Parallel 8bit interface */ class PAR8 : public Protocols { public: /** Create a PAR8 display interface with a GPIO port and 5 control pins * * @param port GPIO port to use * @param CS pin connected to CS of display * @param reset pin connected to RESET of display * @param DC pin connected to data/command of display * @param WR pin connected to SDI of display * @param RD pin connected to RS of display */ PAR8(PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD); protected: /** Send 8bit command to display controller * * @param cmd: byte to send * */ virtual void wr_cmd8(unsigned char cmd); /** Send 8bit data to display controller * * @param data: byte to send * */ virtual void wr_data8(unsigned char data); /** Send 2x8bit command to display controller * * @param cmd: halfword to send * */ virtual void wr_cmd16(unsigned short cmd); /** Send 2x8bit data to display controller * * @param data: halfword to send * */ virtual void wr_data16(unsigned short data); /** Send 16bit pixeldata to display controller * * @param data: halfword to send * */ virtual void wr_gram(unsigned short data); /** 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); /** 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); /** 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); /** 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); /** Read 3x8bit ExtendedCommands register data * @param reg the register to read * @returns data as uint * @note EXTC regs (0xB0 to 0xFF) are read/write registers, for Parallel mode directly accessible in both directions */ virtual unsigned int rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd); /** ILI932x specific, does a dummy read cycle, number of bits is protocol dependent * for PAR protocols: a signle RD bit toggle * for SPI8: 8clocks * for SPI16: 16 clocks */ virtual void dummyread (); /** ILI932x specific, select register for a successive write or read * * @param reg register to be selected * @param forread false = a write next (default), true = a read next * @note forread only used by SPI protocols */ virtual void reg_select(unsigned char reg, bool forread =false); /** ILI932x specific, write register with data * * @param reg register to write * @param data 16bit data */ virtual void reg_write(unsigned char reg, unsigned short data); /** ILI932x specific, read register * * @param reg register to be read * @returns 16bit register value */ virtual unsigned short reg_read(unsigned char reg); /** HW reset sequence (without display init commands) */ virtual void hw_reset(); /** Set ChipSelect high or low * @param enable 0/1 */ virtual void BusEnable(bool enable); private: PortInOut _port; DigitalOut _CS; DigitalOut _reset; DigitalOut _DC; DigitalOut _WR; DigitalOut _RD; }; #endif #endif