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/SPI8.h@1:ff019d22b275, 2015-02-13 (annotated)

Committer:
Geremia
Date:
Fri Feb 13 15:25:10 2015 +0000
Revision:
1:ff019d22b275
Parent:
0:75ec1b3cde17
Child:
4:12ba0ecc2c1f
Added SPI_16, LCD done

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Geremia 0:75ec1b3cde17 1 #ifndef SPI8_H
Geremia 0:75ec1b3cde17 2 #define SPI8_H
Geremia 0:75ec1b3cde17 3
Geremia 0:75ec1b3cde17 4 #include "mbed.h"
Geremia 0:75ec1b3cde17 5 #include "Protocols.h"
Geremia 0:75ec1b3cde17 6 //#include "GraphicsDisplay.h"
Geremia 0:75ec1b3cde17 7
Geremia 0:75ec1b3cde17 8 class SPI8 : public Protocols
Geremia 0:75ec1b3cde17 9 {
Geremia 0:75ec1b3cde17 10 public:
Geremia 0:75ec1b3cde17 11
Geremia 0:75ec1b3cde17 12 /** Create an SPI 8bit display interface with 3 control pins
Geremia 0:75ec1b3cde17 13 *
Geremia 0:75ec1b3cde17 14 * @param SPI mosi
Geremia 0:75ec1b3cde17 15 * @param SPI miso
Geremia 0:75ec1b3cde17 16 * @param SPI sclk
Geremia 0:75ec1b3cde17 17 * @param CS pin connected to CS of display
Geremia 0:75ec1b3cde17 18 * @param reset pin connected to RESET of display
Geremia 0:75ec1b3cde17 19 * @param DC pin connected to data/command of display
Geremia 0:75ec1b3cde17 20 */
Geremia 1:ff019d22b275 21 SPI8(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC);
Geremia 0:75ec1b3cde17 22
Geremia 0:75ec1b3cde17 23 protected:
Geremia 0:75ec1b3cde17 24
Geremia 1:ff019d22b275 25 /** Send 8bit command to display controller
Geremia 0:75ec1b3cde17 26 *
Geremia 0:75ec1b3cde17 27 * @param cmd: byte to send
Geremia 0:75ec1b3cde17 28 *
Geremia 0:75ec1b3cde17 29 */
Geremia 1:ff019d22b275 30 virtual void wr_cmd8(unsigned char cmd);
Geremia 0:75ec1b3cde17 31
Geremia 1:ff019d22b275 32 /** Send 8bit data to display controller
Geremia 0:75ec1b3cde17 33 *
Geremia 1:ff019d22b275 34 * @param data: byte to send
Geremia 0:75ec1b3cde17 35 *
Geremia 0:75ec1b3cde17 36 */
Geremia 1:ff019d22b275 37 virtual void wr_data8(unsigned char data);
Geremia 0:75ec1b3cde17 38
Geremia 1:ff019d22b275 39 /** Send same 8bit data to display controller multiple times
Geremia 0:75ec1b3cde17 40 *
Geremia 1:ff019d22b275 41 * @param data: byte to send
Geremia 0:75ec1b3cde17 42 * @param count: how many
Geremia 0:75ec1b3cde17 43 *
Geremia 0:75ec1b3cde17 44 */
Geremia 1:ff019d22b275 45 virtual void wr_data8(unsigned char data, unsigned int count);
Geremia 0:75ec1b3cde17 46
Geremia 0:75ec1b3cde17 47 /** Send array of data bytes to display controller
Geremia 0:75ec1b3cde17 48 *
Geremia 1:ff019d22b275 49 * @param data: unsigned char data array
Geremia 0:75ec1b3cde17 50 * @param lenght: lenght of array
Geremia 0:75ec1b3cde17 51 *
Geremia 0:75ec1b3cde17 52 */
Geremia 1:ff019d22b275 53 virtual void wr_data8buf(unsigned char* data, unsigned int lenght);
Geremia 1:ff019d22b275 54
Geremia 1:ff019d22b275 55 /** Send 16bit command to display controller
Geremia 1:ff019d22b275 56 *
Geremia 1:ff019d22b275 57 * @param cmd: halfword to send
Geremia 1:ff019d22b275 58 *
Geremia 1:ff019d22b275 59 */
Geremia 1:ff019d22b275 60 virtual void wr_cmd16(unsigned short cmd);
Geremia 1:ff019d22b275 61
Geremia 1:ff019d22b275 62 /** Send 16bit data to display controller
Geremia 1:ff019d22b275 63 *
Geremia 1:ff019d22b275 64 * @param data: halfword to send
Geremia 1:ff019d22b275 65 *
Geremia 1:ff019d22b275 66 */
Geremia 1:ff019d22b275 67 virtual void wr_data16(unsigned short data);
Geremia 1:ff019d22b275 68
Geremia 1:ff019d22b275 69 /** Send same 16bit data to display controller multiple times
Geremia 1:ff019d22b275 70 *
Geremia 1:ff019d22b275 71 * @param data: halfword to send
Geremia 1:ff019d22b275 72 * @param count: how many
Geremia 1:ff019d22b275 73 *
Geremia 1:ff019d22b275 74 */
Geremia 1:ff019d22b275 75 virtual void wr_data16(unsigned short data, unsigned int count);
Geremia 1:ff019d22b275 76
Geremia 1:ff019d22b275 77 /** Send array of data shorts to display controller
Geremia 1:ff019d22b275 78 *
Geremia 1:ff019d22b275 79 * @param data: unsigned short data array
Geremia 1:ff019d22b275 80 * @param lenght: lenght (in shorts)
Geremia 1:ff019d22b275 81 *
Geremia 1:ff019d22b275 82 */
Geremia 1:ff019d22b275 83 virtual void wr_data16buf(unsigned short* data, unsigned int lenght);
Geremia 0:75ec1b3cde17 84
Geremia 0:75ec1b3cde17 85 /** HW reset sequence (without display init commands)
Geremia 0:75ec1b3cde17 86 */
Geremia 0:75ec1b3cde17 87 virtual void hw_reset();
Geremia 0:75ec1b3cde17 88
Geremia 0:75ec1b3cde17 89 /** Set ChipSelect high or low
Geremia 0:75ec1b3cde17 90 * @param enable 0/1
Geremia 0:75ec1b3cde17 91 */
Geremia 0:75ec1b3cde17 92 virtual void BusEnable(bool enable);
Geremia 0:75ec1b3cde17 93
Geremia 0:75ec1b3cde17 94 DigitalOut _CS;
Geremia 0:75ec1b3cde17 95
Geremia 0:75ec1b3cde17 96 private:
Geremia 0:75ec1b3cde17 97
Geremia 0:75ec1b3cde17 98 SPI _spi;
Geremia 0:75ec1b3cde17 99 DigitalOut _reset;
Geremia 0:75ec1b3cde17 100 DigitalOut _DC;
Geremia 0:75ec1b3cde17 101
Geremia 0:75ec1b3cde17 102 };
Geremia 0:75ec1b3cde17 103 #endif