Darren Ulrich / UniGraphic

Added SPI burst mode to spi 8 bit.

Dependents:   Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG

Fork of UniGraphic by GraphicsDisplay

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/PAR16.h

Committer:
trevieze
Date:
2017-08-04
Revision:
36:0ced7cf0ec8c
Parent:
11:b842b8e332cb
Child:
20:14daa48ffd4c

File content as of revision 36:0ced7cf0ec8c:

#ifndef PAR16_H
#define PAR16_H

#include "mbed.h"
#include "Protocols.h"
//#include "GraphicsDisplay.h"

/** Parallel 16bit interface
*/
class PAR16 : public Protocols
{
 public:

    /** Create a PAR16 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 
    */ 
    PAR16(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  
    * @note 2cycles using pins[7:0]
    */   
    virtual void wr_cmd16(unsigned short cmd);
    
    /** Send 2x8bit data to display controller 
    *
    * @param data: halfword to send   
    * @note 2cycles using pins[7:0], only gram write cmd uses pins[15:8]
    */   
    virtual void wr_data16(unsigned short data);
    
    /** Send 16bit pixeldata to display controller 
    *
    * @param data: halfword to send   
    * @note here using all pins[15:0]
    */   
    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
    * @note here using all pins[15:0]
    */   
    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)
    * @note here using all pins[15:0]
    */   
    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);
    
    /** 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