In SX Microcontrollers, SX/B Compiler and SX-Key Tool, FORD wrote:

Hi All,
Am just wondering if I am going about this the right way, in SXBasic.

I have serial data coming into an SX pin, and want to shift that data into a byte variable.

I'm just not sure if its working correctly...

 

string is a byte variable.

RA.0 is the serial input pin

 

immediately after I detect the start bit it goes something like this...

 

  pauseus 417                 'align the first data bit to the middle of the bit, correct for 1200bps

  startbit = RA.0              'get start bit

  pauseus 833                 'pause 1 bit period

for counter = 0 to 7         'loop for 8 bits of data

  string.7 = RA.0              'get the serial input pin state and put it into bit 7 of 'string' variable

  string = string SHR 1      'shift bits right

  pauseus 833                 

next

  parity = RA.0                'get parity bit

  pauseus 833

  stopbit = RA.0              'get stop bit

  pauseus 833

 

Is there a problem with getting a pin state into a variable this way ?

I mean can you just put any bit of a byte variable directly onto a pin ?

 

I cant use the serin command, because its E81 comms.

 

 

Cheers,

Chris, Weastern Australia.

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