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/SPI16.h@36:0ced7cf0ec8c, 2017-08-04 (annotated)

Committer:
trevieze
Date:
Fri Aug 04 19:47:21 2017 +0000
Revision:
36:0ced7cf0ec8c
Parent:
11:b842b8e332cb
Child:
20:14daa48ffd4c
Added Gimp Graphic Display Routine for Compass

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Geremia 1:ff019d22b275 1 #ifndef SPI16_H
Geremia 1:ff019d22b275 2 #define SPI16_H
Geremia 1:ff019d22b275 3
Geremia 1:ff019d22b275 4 #include "mbed.h"
Geremia 1:ff019d22b275 5 #include "Protocols.h"
Geremia 1:ff019d22b275 6 //#include "GraphicsDisplay.h"
Geremia 1:ff019d22b275 7
Geremia 6:8356d48a07db 8 /** SPI 16bit interface
Geremia 6:8356d48a07db 9 */
Geremia 1:ff019d22b275 10 class SPI16 : public Protocols
Geremia 1:ff019d22b275 11 {
Geremia 1:ff019d22b275 12 public:
Geremia 1:ff019d22b275 13
Geremia 1:ff019d22b275 14 /** Create an SPI 8bit display interface with 3 control pins
Geremia 1:ff019d22b275 15 *
Geremia 1:ff019d22b275 16 * @param SPI mosi
Geremia 1:ff019d22b275 17 * @param SPI miso
Geremia 1:ff019d22b275 18 * @param SPI sclk
Geremia 1:ff019d22b275 19 * @param CS pin connected to CS of display
Geremia 1:ff019d22b275 20 * @param reset pin connected to RESET of display
Geremia 1:ff019d22b275 21 * @param DC pin connected to data/command of display
Geremia 1:ff019d22b275 22 */
Geremia 1:ff019d22b275 23 SPI16(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC);
Geremia 1:ff019d22b275 24
Geremia 1:ff019d22b275 25 protected:
Geremia 1:ff019d22b275 26
Geremia 1:ff019d22b275 27 /** Send 8bit command to display controller
Geremia 1:ff019d22b275 28 *
Geremia 1:ff019d22b275 29 * @note switches spi format 16->8->16, better use wr_cmd16 with NOP in front
Geremia 1:ff019d22b275 30 * @param cmd: byte to send
Geremia 1:ff019d22b275 31 *
Geremia 1:ff019d22b275 32 */
Geremia 1:ff019d22b275 33 virtual void wr_cmd8(unsigned char cmd);
Geremia 1:ff019d22b275 34
Geremia 1:ff019d22b275 35 /** Send 8bit data to display controller
Geremia 1:ff019d22b275 36 *
Geremia 1:ff019d22b275 37 * @note switches spi format 16->8->16, better use wr_data16 with repeated byte (if does not hurt)
Geremia 1:ff019d22b275 38 * @param data: byte to send
Geremia 1:ff019d22b275 39 *
Geremia 1:ff019d22b275 40 */
Geremia 1:ff019d22b275 41 virtual void wr_data8(unsigned char data);
Geremia 1:ff019d22b275 42
Geremia 4:12ba0ecc2c1f 43 /** Send 2x8bit command to display controller
Geremia 1:ff019d22b275 44 *
Geremia 1:ff019d22b275 45 * @param cmd: halfword to send
Geremia 4:12ba0ecc2c1f 46 * @note in SPI_16 mode a single 16bit transfer will be done
Geremia 1:ff019d22b275 47 */
Geremia 1:ff019d22b275 48 virtual void wr_cmd16(unsigned short cmd);
Geremia 1:ff019d22b275 49
Geremia 4:12ba0ecc2c1f 50 /** Send 2x8bit data to display controller
Geremia 4:12ba0ecc2c1f 51 *
Geremia 4:12ba0ecc2c1f 52 * @param data: halfword to send
Geremia 4:12ba0ecc2c1f 53 * @note in SPI_16 mode a single 16bit transfer will be done
Geremia 4:12ba0ecc2c1f 54 */
Geremia 4:12ba0ecc2c1f 55 virtual void wr_data16(unsigned short data);
Geremia 4:12ba0ecc2c1f 56
Geremia 4:12ba0ecc2c1f 57 /** Send 16bit pixeldata to display controller
Geremia 1:ff019d22b275 58 *
Geremia 1:ff019d22b275 59 * @param data: halfword to send
Geremia 1:ff019d22b275 60 *
Geremia 1:ff019d22b275 61 */
Geremia 4:12ba0ecc2c1f 62 virtual void wr_gram(unsigned short data);
Geremia 1:ff019d22b275 63
Geremia 4:12ba0ecc2c1f 64 /** Send same 16bit pixeldata to display controller multiple times
Geremia 1:ff019d22b275 65 *
Geremia 1:ff019d22b275 66 * @param data: halfword to send
Geremia 1:ff019d22b275 67 * @param count: how many
Geremia 1:ff019d22b275 68 *
Geremia 1:ff019d22b275 69 */
Geremia 4:12ba0ecc2c1f 70 virtual void wr_gram(unsigned short data, unsigned int count);
Geremia 1:ff019d22b275 71
Geremia 4:12ba0ecc2c1f 72 /** Send array of pixeldata shorts to display controller
Geremia 1:ff019d22b275 73 *
Geremia 4:12ba0ecc2c1f 74 * @param data: unsigned short pixeldata array
Geremia 1:ff019d22b275 75 * @param lenght: lenght (in shorts)
Geremia 1:ff019d22b275 76 *
Geremia 1:ff019d22b275 77 */
Geremia 4:12ba0ecc2c1f 78 virtual void wr_grambuf(unsigned short* data, unsigned int lenght);
Geremia 1:ff019d22b275 79
Geremia 5:b222a9461d6b 80 /** Read 16bit pixeldata from display controller (with dummy cycle)
Geremia 5:b222a9461d6b 81 *
Geremia 11:b842b8e332cb 82 * @param convert true/false. Convert 18bit to 16bit, some controllers returns 18bit
Geremia 5:b222a9461d6b 83 * @returns 16bit color
Geremia 5:b222a9461d6b 84 */
Geremia 11:b842b8e332cb 85 virtual unsigned short rd_gram(bool convert);
Geremia 5:b222a9461d6b 86
Geremia 7:bb0383b91104 87 /** Read 4x8bit register data (with dummy cycle)
Geremia 7:bb0383b91104 88 * @param reg the register to read
Geremia 7:bb0383b91104 89 * @returns data as uint
Geremia 7:bb0383b91104 90 *
Geremia 7:bb0383b91104 91 */
Geremia 7:bb0383b91104 92 virtual unsigned int rd_reg_data32(unsigned char reg);
Geremia 7:bb0383b91104 93
Geremia 7:bb0383b91104 94 /** Read 3x8bit ExtendedCommands register data
Geremia 7:bb0383b91104 95 * @param reg the register to read
Geremia 7:bb0383b91104 96 * @param SPIreadenablecmd vendor/device specific cmd to read EXTC registers
Geremia 7:bb0383b91104 97 * @returns data as uint
Geremia 7:bb0383b91104 98 * @note EXTC regs (0xB0 to 0xFF) are read/write registers but needs special cmd to be read in SPI mode
Geremia 7:bb0383b91104 99 */
Geremia 7:bb0383b91104 100 virtual unsigned int rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd);
Geremia 7:bb0383b91104 101
Geremia 1:ff019d22b275 102 /** HW reset sequence (without display init commands)
Geremia 1:ff019d22b275 103 */
Geremia 1:ff019d22b275 104 virtual void hw_reset();
Geremia 1:ff019d22b275 105
Geremia 1:ff019d22b275 106 /** Set ChipSelect high or low
Geremia 1:ff019d22b275 107 * @param enable 0/1
Geremia 1:ff019d22b275 108 */
Geremia 1:ff019d22b275 109 virtual void BusEnable(bool enable);
Geremia 1:ff019d22b275 110
Geremia 1:ff019d22b275 111 DigitalOut _CS;
Geremia 1:ff019d22b275 112
Geremia 1:ff019d22b275 113 private:
Geremia 1:ff019d22b275 114
Geremia 1:ff019d22b275 115 SPI _spi;
Geremia 1:ff019d22b275 116 DigitalOut _reset;
Geremia 1:ff019d22b275 117 DigitalOut _DC;
Geremia 1:ff019d22b275 118
Geremia 1:ff019d22b275 119 };
Geremia 1:ff019d22b275 120 #endif