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;
    }
}

Inits/ST7565.cpp

Committer:
trevieze
Date:
2017-08-04
Revision:
36:0ced7cf0ec8c
Parent:
18:ffa58f1a680a
Child:
21:ae0a4eedfc90

File content as of revision 36:0ced7cf0ec8c:

 /* mbed UniGraphic library - Device specific class
 * Copyright (c) 2015 Giuliano Dianda
 * Released under the MIT License: http://mbed.org/license/mit
 */
#include "Protocols.h"
#include "ST7565.h"

/*this is a quite standard config for ST7565 and similars, like UC1701*/

//////////////////////////////////////////////////////////////////////////////////
// display settings ///////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////
#define IC_X_SEGS    132 // ST7565 SEG has range 0-131 (131-0 if ADC=1), check your datasheet, important for the orientation
#define IC_Y_COMS    64  // ST7565 COM has range 0-63 (63-0 if SHL=1), check your datasheet, important for the orientation
// put in constructor
//#define LCDSIZE_X       128 // display X pixels, ST7565 is advertised as 132x65 but display size could be smaller
//#define LCDSIZE_Y       64  // display Y pixels, the 65th is for accessing "icons"



ST7565::ST7565(proto_t displayproto, PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const char *name, unsigned int LCDSIZE_X, unsigned  int LCDSIZE_Y)
    : LCD(displayproto, port, CS, reset, DC, WR, RD, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
{
    hw_reset();
    BusEnable(true);
    init();
    cls();
    set_orientation(1);
    locate(0,0);
}
ST7565::ST7565(proto_t displayproto, int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC, const char *name, unsigned int LCDSIZE_X, unsigned  int LCDSIZE_Y)
    : LCD(displayproto, Hz, mosi, miso, sclk, CS, reset, DC, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
{
    hw_reset();
    BusEnable(true);
    init();
    cls();
    set_orientation(1);
    locate(0,0);
}
// reset and init the lcd controller
// init sequence is manufacturer specific
void ST7565::init()
{
    /* Start Initial Sequence ----------------------------------------------------*/
    
    wr_cmd8(0xE2);   //  sw reset
    wait_ms(10);
    
    wr_cmd8(0xAE);   //  display off
    
    wr_cmd8(0xA2);   //  bias voltage (1/9)
  //  wr_cmd8(0xA3);   //  bias voltage (1/7)

    //wr_cmd8(0xA0);   // ADC select seg0-seg131
    wr_cmd8(0xA1);   // ADC select seg223-seg0
    //wr_cmd8(0xC8);   // SHL select com63-com0
    wr_cmd8(0xC0);   // SHL select com0-com63

    wr_cmd8(0x2C);   //   Boost ON
    wait_ms(10);
    wr_cmd8(0x2E);   //   Voltage Regulator ON
    wait_ms(10);
    wr_cmd8(0x2F);   //   Voltage Follower ON
    wait_ms(10);
    wr_cmd8(0x20|0x05);   //  Regulor_Resistor_Select resistor ratio 20-27, look at your display specific init code
    set_contrast(0x20);
    //wr_cmd8(0x81);   //  set contrast (reference voltage register set)
    //wr_cmd8(0x15);   //  contrast 00-3F
    
    wr_cmd8(0xA4);   //  LCD display ram (EntireDisplayOn disable)
    wr_cmd8(0x40);   // start line = 0
    wr_cmd8(0xA6);     // display normal (1 = illuminated)
    wr_cmd8(0xAF);     // display ON 

}