text: /*
    u8x8cb.c
  */
  
  #include "chip.h"
  #include "delay.h"
  #include "u8x8.h"
  
  /* although we use SW I2C, use the HW pins for later upgrade */
  #define I2C_CLOCK_PIN 10
  #define I2C_CLOCK_PORT 0
  #define I2C_DATA_PIN  11
  #define I2C_DATA_PORT 0
  
  uint8_t u8x8_gpio_and_delay_lpc11u3x(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
  {
    switch(msg)
    {
      case U8X8_MSG_GPIO_AND_DELAY_INIT:
        /* only support for software I2C*/
      
        Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO10, PIN_I2CMODE_GPIO);	/* clk */
        Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO11, PIN_I2CMODE_GPIO);	/* data */
        Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, I2C_CLOCK_PORT, I2C_CLOCK_PIN);
        Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, I2C_DATA_PORT, I2C_DATA_PIN);    
  
  /*    
        Chip_IOCON_PinMuxSet(LPC_IOCON, KEY_SELECT_PORT, KEY_SELECT_PIN, KEY_SELECT_FN|IOCON_MODE_PULLUP);    
        Chip_GPIO_SetPinDIRInput(LPC_GPIO, KEY_SELECT_PORT, KEY_SELECT_PIN);
  
        Chip_IOCON_PinMuxSet(LPC_IOCON, KEY_PREV_PORT, KEY_PREV_PIN, IOCON_MODE_PULLUP);    
        Chip_GPIO_SetPinDIRInput(LPC_GPIO, KEY_PREV_PORT, KEY_PREV_PIN);
  
        Chip_IOCON_PinMuxSet(LPC_IOCON, KEY_NEXT_PORT, KEY_NEXT_PIN, IOCON_MODE_PULLUP);    
        Chip_GPIO_SetPinDIRInput(LPC_GPIO, KEY_NEXT_PORT, KEY_NEXT_PIN);
  
        Chip_IOCON_PinMuxSet(LPC_IOCON, KEY_HOME_PORT, KEY_HOME_PIN, KEY_HOME_FN|IOCON_MODE_PULLUP);    
        Chip_GPIO_SetPinDIRInput(LPC_GPIO, KEY_HOME_PORT, KEY_HOME_PIN);
  */
      
        break;
      case U8X8_MSG_DELAY_NANO:
        /* not required for SW I2C */
        break;
      
      case U8X8_MSG_DELAY_10MICRO:
        /* not used at the moment */
        break;
      
      case U8X8_MSG_DELAY_100NANO:
        /* not used at the moment */
        break;
     
      case U8X8_MSG_DELAY_MILLI:
        delay_micro_seconds(arg_int*1000UL);
        break;
      case U8X8_MSG_DELAY_I2C:
        /* arg_int is 1 or 4: 100KHz (5us) or 400KHz (1.25us) */
        delay_micro_seconds(arg_int<=2?5:1);
        break;
      
      case U8X8_MSG_GPIO_I2C_CLOCK:
        if ( arg_int == 0 )
        {
  	Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT, I2C_CLOCK_PORT, I2C_CLOCK_PIN);
  	Chip_GPIO_SetPinOutLow(LPC_GPIO_PORT, I2C_CLOCK_PORT, I2C_CLOCK_PIN);
        }
        else
        {
  	//Chip_GPIO_SetPinOutHigh(LPC_GPIO, I2C_CLOCK_PORT, I2C_CLOCK_PIN);
  	Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, I2C_CLOCK_PORT, I2C_CLOCK_PIN);
        }
        break;
      case U8X8_MSG_GPIO_I2C_DATA:
        if ( arg_int == 0 )
        {
  	Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT, I2C_DATA_PORT, I2C_DATA_PIN);
  	Chip_GPIO_SetPinOutLow(LPC_GPIO_PORT, I2C_DATA_PORT, I2C_DATA_PIN);
        }
        else
        {
  	//Chip_GPIO_SetPinOutHigh(LPC_GPIO, I2C_DATA_PORT, I2C_DATA_PIN);
  	Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, I2C_DATA_PORT, I2C_DATA_PIN);
        }
        break;
  /*
      case U8X8_MSG_GPIO_MENU_SELECT:
        u8x8_SetGPIOResult(u8x8, Chip_GPIO_GetPinState(LPC_GPIO, KEY_SELECT_PORT, KEY_SELECT_PIN));
        break;
      case U8X8_MSG_GPIO_MENU_NEXT:
        u8x8_SetGPIOResult(u8x8, Chip_GPIO_GetPinState(LPC_GPIO, KEY_NEXT_PORT, KEY_NEXT_PIN));
        break;
      case U8X8_MSG_GPIO_MENU_PREV:
        u8x8_SetGPIOResult(u8x8, Chip_GPIO_GetPinState(LPC_GPIO, KEY_PREV_PORT, KEY_PREV_PIN));
        break;
      
      case U8X8_MSG_GPIO_MENU_HOME:
        u8x8_SetGPIOResult(u8x8, Chip_GPIO_GetPinState(LPC_GPIO, KEY_HOME_PORT, KEY_HOME_PIN));
        break;
  */
      default:
        u8x8_SetGPIOResult(u8x8, 1);
        break;
    }
    return 1;
  }
  