Mindboards

Code: Select all

WriteBuf[1] = 0xf+(~ReadBuf[0]) ;

Code: Select all

WriteBuf[1] = 0xff-(ReadBuf[0]) ; //You may need the NOT bitwise operator in there, I don't know, as your code is incomplete)

Code: Select all

#define I2Cport S4
#define I2CAddr8574  0x40                         // I2C Address pour 8574

unsigned byte WriteBuf[]={I2CAddr8574,0x00};               // adresse - données
unsigned byte ReadBuf[];                                   // Lecture PCF8574
int RdCnt=5;                                      // Nb byte a lire
unsigned byte lightLed = 0x00;


int GetTouchSwitches()
{
  do
  {
    I2CBytes(I2Cport, WriteBuf, RdCnt, ReadBuf);
  }while (ReadBuf[0] == WriteBuf[1])           // instead of do "ReadBuf[0] == 0xff", i check if the data change. That's how i can light more than 1 led at the same time (if i write 0xff, i turn off led)
}


task main()
{
  ClearScreen();
  SetSensorLowspeed(I2Cport);
  WriteBuf[1] = 0xff;                         // turn off leds
  while(true){
    GetTouchSwitches();                    // get button pressed
    ReadBuf[0] >>= 4;                        // readbuf = 4byte for button and 4 byte for led, i only need informations about button then i delete led bytes
    lightLed = ~ReadBuf[0];                // ~ operator convert 0 to 1 and 1 to 0   (button pressed is high level 1 but i need a low level 0 to ligh a led)
    lightLed = (lightLed) & (WriteBuf[1]);        // i use an AND operator to keep previous light leds
    WriteBuf[1] = lightLed;                            
    I2CBytes(I2Cport, WriteBuf, RdCnt, ReadBuf);   // i send data to PCF8574 
    Wait(100);
  }
}