Diff: UniGraphic/Protocols/SPI16.h

Revision:

0:fa952828e34c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/UniGraphic/Protocols/SPI16.h	Sun May 10 10:44:31 2020 +0000
@@ -0,0 +1,151 @@
+#ifndef SPI16_H
+#define SPI16_H
+
+#define NDEBUG // avoid MBED_ASSERT to halt process when PinName DC==NC
+
+#include "mbed.h"
+#include "Protocols.h"
+//#include "GraphicsDisplay.h"
+
+/** SPI 16bit interface
+*/
+class SPI16 : 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
+    */ 
+    SPI16(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC=NC);
+ 
+protected:
+   
+    /** Send 8bit command to display controller 
+    *
+    * @note switches spi format 16->8->16, better use wr_cmd16 with NOP in front 
+    * @param cmd: byte to send  
+    *
+    */   
+    virtual void wr_cmd8(unsigned char cmd);
+    
+    /** Send 8bit data to display controller 
+    *
+    * @note switches spi format 16->8->16, better use wr_data16 with repeated byte (if does not hurt)
+    * @param data: byte to send   
+    *
+    */   
+    virtual void wr_data8(unsigned char data);
+    
+    /** Send 2x8bit command to display controller 
+    *
+    * @param cmd: halfword to send  
+    * @note in SPI_16 mode a single 16bit transfer will be done
+    */   
+    virtual void wr_cmd16(unsigned short cmd);
+    
+    /** Send 2x8bit data to display controller 
+    *
+    * @param data: halfword to send   
+    * @note in SPI_16 mode a single 16bit transfer will be done
+    */   
+    virtual void wr_data16(unsigned short data);
+    
+    /** Send 16bit pixeldata to display controller 
+    *
+    * @param data: halfword to send   
+    *
+    */   
+    virtual void wr_gram(unsigned short data);
+    
+    /** Send same 16bit pixeldata to display controller multiple times
+    *
+    * @param data: halfword to send
+    * @param count: how many
+    *
+    */   
+    virtual void wr_gram(unsigned short data, unsigned int count);
+    
+    /** Send array of pixeldata shorts to display controller
+    *
+    * @param data: unsigned short pixeldata array
+    * @param lenght: lenght (in shorts)
+    *
+    */   
+    virtual void wr_grambuf(unsigned short* data, unsigned int lenght);
+    
+    /** Read 16bit pixeldata from display controller (with dummy cycle)
+    *
+    * @param convert true/false. Convert 18bit to 16bit, some controllers returns 18bit
+    * @returns 16bit color
+    */ 
+    virtual unsigned short rd_gram(bool convert);
+    
+    /** Read 4x8bit register data (with dummy cycle)
+    * @param reg the register to read
+    * @returns data as uint
+    * 
+    */ 
+    virtual unsigned int rd_reg_data32(unsigned char reg);
+    
+    /** Read 3x8bit ExtendedCommands register data
+    * @param reg the register to read
+    * @param SPIreadenablecmd vendor/device specific cmd to read EXTC registers
+    * @returns data as uint
+    * @note EXTC regs (0xB0 to 0xFF) are read/write registers but needs special cmd to be read in SPI mode
+    */ 
+    virtual unsigned int rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd);
+    
+    /** ILI932x specific, does a dummy read cycle, number of bits is protocol dependent
+    * for PAR protocols: a signle RD bit toggle
+    * for SPI8: 8clocks
+    * for SPI16: 16 clocks
+    */   
+    virtual void dummyread ();
+    
+    /** ILI932x specific, select register for a successive write or read
+    *
+    * @param reg register to be selected
+    * @param forread false = a write next (default), true = a read next
+    * @note forread only used by SPI protocols
+    */   
+    virtual void reg_select(unsigned char reg, bool forread =false);
+    
+    /** ILI932x specific, write register with data
+    *
+    * @param reg register to write
+    * @param data 16bit data
+    */   
+    virtual void reg_write(unsigned char reg, unsigned short data);
+    
+    /** ILI932x specific, read register
+    *
+    * @param reg register to be read
+    * @returns 16bit register value
+    */ 
+    virtual unsigned short reg_read(unsigned char reg);
+    
+    /** 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