Added SPI burst mode to spi 8 bit.
Dependents: Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG
Fork of UniGraphic by
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; } }
Diff: Protocols/SPI8.h
- Revision:
- 0:75ec1b3cde17
- Child:
- 1:ff019d22b275
diff -r 000000000000 -r 75ec1b3cde17 Protocols/SPI8.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Protocols/SPI8.h Thu Feb 12 22:22:47 2015 +0000 @@ -0,0 +1,73 @@ +#ifndef SPI8_H +#define SPI8_H + +#include "mbed.h" +#include "Protocols.h" +//#include "GraphicsDisplay.h" + +class SPI8 : public Protocols +{ + public: + + /** Create an SPI 8bit display interface with 3 control pins + * + * @param SPI mosi + * @param SPI miso + * @param SPI sclk + * @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 + */ + SPI8(PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC); + +protected: + + /** Send command byte to display controller + * + * @param cmd: byte to send + * + */ + virtual void wr_cmd(unsigned char cmd); + + /** Send data byte to display controller + * + * @param data8: byte to send + * + */ + virtual void wr_data8(unsigned char data8); + + /** Send same data byte to display controller multiple times + * + * @param data8: byte to send + * @param count: how many + * + */ + virtual void wr_data8(unsigned char data8, unsigned int count); + + /** Send array of data bytes to display controller + * + * @param data8: unsigned char data array + * @param lenght: lenght of array + * + */ + virtual void wr_data8buf(unsigned char* data8, unsigned int lenght); + + /** 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); + + DigitalOut _CS; + +private: + + SPI _spi; + DigitalOut _reset; + DigitalOut _DC; + +}; +#endif \ No newline at end of file