Added SPI burst mode to spi 8 bit.
Dependents: Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG
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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
- Committer:
- Geremia
- Date:
- 2015-02-13
- Revision:
- 1:ff019d22b275
- Parent:
- 0:75ec1b3cde17
- Child:
- 4:12ba0ecc2c1f
File content as of revision 1:ff019d22b275:
#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(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC); protected: /** Send 8bit command to display controller * * @param cmd: byte to send * */ virtual void wr_cmd8(unsigned char cmd); /** Send 8bit data to display controller * * @param data: byte to send * */ virtual void wr_data8(unsigned char data); /** Send same 8bit data to display controller multiple times * * @param data: byte to send * @param count: how many * */ virtual void wr_data8(unsigned char data, unsigned int count); /** Send array of data bytes to display controller * * @param data: unsigned char data array * @param lenght: lenght of array * */ virtual void wr_data8buf(unsigned char* data, unsigned int lenght); /** Send 16bit command to display controller * * @param cmd: halfword to send * */ virtual void wr_cmd16(unsigned short cmd); /** Send 16bit data to display controller * * @param data: halfword to send * */ virtual void wr_data16(unsigned short data); /** Send same 16bit data to display controller multiple times * * @param data: halfword to send * @param count: how many * */ virtual void wr_data16(unsigned short data, unsigned int count); /** Send array of data shorts to display controller * * @param data: unsigned short data array * @param lenght: lenght (in shorts) * */ virtual void wr_data16buf(unsigned short* data, 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