• Key error
    I have what appears to be a problem with the PK51 development environment. I have two development systems one running under NT and the other XP. When I enter the simulator mode using the NT machine around...
  • shifting arrays
    hi, i'm using uVision3.33 , uC-80c31x2. my question is: I'v initilize buffer array which is been loaded with 24 Byte each interval time. now i want to shift the all array right/left by 1 bit....
  • shifting bits
    I'm trying to read the data from an ADC. I'm getting the error message error C193 '+=' bad operand type. If I use '=+' I don't get the error but my data is shifting. My result is a 0 or 1. It should be...
  • bit shifting
    hello there i have some problem regarding the bit shifting i want to convert the some no. from Hex. to Decimal for that i am going to used the shifting. when i recived the no. in hex format then i want...
  • 3x4 key pad
    Hi, if a 3x4 keypad is connected to port 0 of 89c51. all pins on port 0 need to connect pull up resistor or not?