UniGraphic-Fork for ST7920-LCD-controller and SH1106. Tested with 128x64 LCD with SPI and 128x64-OLED with IIC
Dependents: UniGraphic-St7920-Test AfficheurUTILECO
Fork of UniGraphic by
Fork of the UniGraphic-Library for monochrome LCDs with ST7920 controller and 128x64-IIC-OLED-Display with SH1106-Controller
Had to adapt LCD for following reasons:
- Give access to screenbuffer buffer[] to parent class
- pixel() and pixel_read() as they are hardware-dependent
- added reset-pin to IIC-Interface
GraphicDisplay:: sends buffer to LCD when auto_update is set to true.
Testprogram for ST7920 can be found here:
https://developer.mbed.org/users/charly/code/UniGraphic-St7920-Test/
Protocols/SPI16.h
- Committer:
- charly
- Date:
- 2018-10-30
- Revision:
- 38:1b6f9fc49a03
- Parent:
- 28:2b562717a864
File content as of revision 38:1b6f9fc49a03:
#ifndef SPI16_H #define SPI16_H #define NDEBUG // avoid MBED_ASSERT to halt process when PinName DC==NC #include "mbed.h" #include "Protocols.h" //#include "GraphicsDisplay.h" /** SPI 16bit interface */ class SPI16 : public Protocols { public: /** Create an SPI 8bit display interface with 3 control pins * * @param SPI mosi * @param SPI miso * @param SPI sclk * @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 */ SPI16(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC=NC); protected: /** Send 8bit command to display controller * * @note switches spi format 16->8->16, better use wr_cmd16 with NOP in front * @param cmd: byte to send * */ virtual void wr_cmd8(unsigned char cmd); /** Send 8bit data to display controller * * @note switches spi format 16->8->16, better use wr_data16 with repeated byte (if does not hurt) * @param data: byte to send * */ virtual void wr_data8(unsigned char data); /** Send 2x8bit command to display controller * * @param cmd: halfword to send * @note in SPI_16 mode a single 16bit transfer will be done */ virtual void wr_cmd16(unsigned short cmd); /** Send 2x8bit data to display controller * * @param data: halfword to send * @note in SPI_16 mode a single 16bit transfer will be done */ 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 * @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); /** 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); DigitalOut _CS; private: SPI _spi; DigitalOut _reset; DigitalOut _DC; }; #endif