text: /*
    
    u8g_com_psoc5_ssd_hw_parallel.c
  
    com interface for Cypress PSoC5 and the SSDxxxx chip variant
    I2C protocol
  
    Universal 8bit Graphics Library
    
    Copyright (c) 2015, olikraus@gmail.com, schmidt.ronny@gmail.com
    All rights reserved.
  
    Redistribution and use in source and binary forms, with or without modification, 
    are permitted provided that the following conditions are met:
  
    * Redistributions of source code must retain the above copyright notice, this list 
      of conditions and the following disclaimer.
      
    * Redistributions in binary form must reproduce the above copyright notice, this 
      list of conditions and the following disclaimer in the documentation and/or other 
      materials provided with the distribution.
  
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
    CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
    MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
    STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
    ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
     
     
  */
  
  #include "u8g.h"
  
  #if defined(U8G_CYPRESS_PSOC5)
    
  #include <project.h>   
  
  static uint8 dc = 0; // need to store whether next write is data or command
    
  uint8_t u8g_com_psoc5_ssd_hw_parallel_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
  {
    switch(msg)
    {
      case U8G_COM_MSG_STOP:
        // stop the device
        GraphicLCDIntf_Stop();
        break;
      
      case U8G_COM_MSG_INIT:
    		// init hardware interfaces, timers, gpios, ...
        GraphicLCDIntf_Init();
        break;
      
      case U8G_COM_MSG_ADDRESS:                     
        // switch from cmd (arg_val = 0) to data mode (arg_val = 1) or vice versa
        dc = arg_val;
        break;
  
      case U8G_COM_MSG_CHIP_SELECT:
  		  /* done by the hardware */
        break;
        
      case U8G_COM_MSG_RESET:
        // toggle the reset pin of the display by value in arg_val
        nRES_Write(0);
        u8g_10MicroDelay();
        nRES_Write(1);
        break;
      
      case U8G_COM_MSG_WRITE_BYTE:
        // write byte to the device
  		  GraphicLCDIntf_Write8(dc, arg_val);
        break;
      
      case U8G_COM_MSG_WRITE_SEQ:
      case U8G_COM_MSG_WRITE_SEQ_P:
        {
          // write a sequence of bytes to the device
          register uint8_t *ptr = arg_ptr;
          while (arg_val-- > 0)
          {
            GraphicLCDIntf_Write8(dc, *ptr++);
          }
        }
        break;
        
  
    }
    return 1;
  }
  
  #else
  
  uint8_t u8g_com_psoc5_ssd_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
  {
    return 1;
  }
  
  #endif
  