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suvarna_mtech
Joined: 04 Oct 2008
Posts: 2
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 04 Oct 2008 12:58 Bitbanging C sample Code |
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Hi,
I am using P89C61X2 controller.
I want to connect one serial interfacing device to controller.
I am connecting it through bit banging.
I am not able to put time out, if the device not responds me.
Please help me out.
I am connecting device with 19200 bps,
I am confuse my used bit time is OK or not.
If my device is disconnected, my program is not timed out.
Controller remains in the loop
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amol_shah
Joined: 21 Apr 2008
Posts: 97
Helped: 12
Location: Nasik, Mumbai
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suvarna_mtech
Joined: 04 Oct 2008
Posts: 2
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| 06 Oct 2008 4:59 Re: Bitbanging C sample Code |
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Hi,
Thanks for the help.
I am not using interrupt.
Here is the code
BRXD = 1; //This is port pin which i'm using as receive
while(BRXD); //When data receives, Receive Pin goes low. Here i'm waiting for bit to receive. I am confuse how i put timeout here. I want this to timeout if data not receives in specified time interval
Bit_Time(BIT_TIME/2); //Wait 1/2 bit-time to sample in middle
for(; i < 8; i++) // Send 8 bits to the I2C Bus
{
inbyte = inbyte >>1;
Bit_Time(BIT_TIME);
if(BRXD)
inbyte |= 0x80;
else
inbyte &= ~(0x80);
}
return inbyte;
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