Diff: Protocols/I2C_bus.h

Revision:

33:f87f06292637

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Protocols/I2C_bus.h	Mon Feb 06 12:29:33 2017 +0000
@@ -0,0 +1,139 @@
+#ifndef I2C_bus_H
+#define I2C_bus_H
+
+#include "mbed.h"
+#include "Protocols.h"
+
+/** I2C interface
+*/
+class I2C_bus : public Protocols
+{
+ public:
+
+    /** Create an I2C display interface 
+    *
+    * @param I2C frquency
+    * @param I2C address
+    * @param I2C pin sda
+    * @param I2C pin scl
+    */ 
+    I2C_bus(int Hz, int address,PinName sda, PinName scl);
+ 
+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 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 (
+    *   reading from display ia I2C is not implemented in most controllers !
+    * 
+    */ 
+    virtual unsigned int rd_reg_data32(unsigned char reg);
+    
+    /** Read 3x8bit ExtendedCommands register data
+    *   reading from display ia I2C is not implemented in most controllers !
+    */ 
+    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
+    *   reading from display ia I2C is not implemented in most controllers !
+    */   
+    virtual void dummyread ();
+    
+    /** ILI932x specific, select register for a successive write or read
+    *
+    *   reading from display ia I2C is not implemented in most controllers !
+    */   
+    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
+    *  not implemented for I2C !
+    */   
+    virtual void reg_write(unsigned char reg, unsigned short data);
+    
+    /** ILI932x specific, read register
+    *
+    * @param reg register to be read
+    * @returns 16bit register value
+    *  not implemented for I2C !
+    */ 
+    virtual unsigned short reg_read(unsigned char reg);
+    
+    /** HW reset sequence (without display init commands)
+    *  most I2C displays have no reset signal !   
+    */
+    virtual void hw_reset();
+    
+    /** Set ChipSelect high or low
+    * @param enable 0/1   
+    *  not implemented for I2C !
+    */
+    virtual void BusEnable(bool enable);
+
+private:
+
+    I2C _i2c;
+    int _address;
+    
+};
+
+
+#endif
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