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I need an expert programer

I need help on reading 8bit from port0 on receiving int0 interrupt.Based on the received data i want to send some data on port0.

for this any one can help me programing ?
I am using atmel 89c52 Mcu

0 Jon Ward over 22 years ago

void int_0 (void) interrupt 0
{
P0 = 0xFF;        // Setup P0 for input

if (P0 == 0x34)   // Read P0, if == 0x34
  P0 = 0x45;      // Write 0x45 to P0
}

Jon

0 Rutu Patil over 22 years ago in reply to Jon Ward

Thanks for the pro.
If i am correct the programe ge activated on sensing the int0 pin low.Then it writes 1 to the port and reads from port and latter writes to port.
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0 Richard Collett over 22 years ago in reply to Rutu Patil

Your specification is a bit vague.
What do you actually have connected to PORT0?
What mechanism allows you to both read from it and also write to it?
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0 Rutu Patil over 22 years ago in reply to Richard Collett

I am using pdiusbd12 at the other en of port0
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0 kamran ahmadi over 20 years ago

dear keil
I need to make programer for 8051SND1.
PLZ help
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0 erik malund over 20 years ago in reply to kamran ahmadi

I need to make programer for 8051SND1.

WHY?, it is an ISP chip

Erik
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