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/Protocols.h

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

File content as of revision 36:0ced7cf0ec8c:

 /* 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