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74hc595.c

 
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CCS-Festina



Joined: 21 Feb 2012
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74hc595.c
PostPosted: Fri Feb 24, 2012 8:46 am     Reply with quote
I'm looking for the driver of 74hc595.c

I request to explain the meaning :

1- for(i=1;i<=NUMBER_OF_74595*8;++i) {

2- if((*(eo+(NUMBER_OF_74595-1))&0x80)==0)



3- write_expanded_outputs (&data[huns],0);
asmboy



Joined: 20 Nov 2007
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PostPosted: Fri Feb 24, 2012 9:29 am     Reply with quote
1- for(i=1;i<=NUMBER_OF_74595*8;++i) {

is a standard 'C for-next loop

2- if((*(eo+(NUMBER_OF_74595-1))&0x80)==0)

a standard C evaluation expression of the IF-THEN variety

3- write_expanded_outputs (&data[huns],0);

a support function using an address operator pointer for its argument
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Fri Feb 24, 2012 2:08 pm     Reply with quote
Here are two threads that discuss how the 74595.c driver works:
http://www.ccsinfo.com/forum/viewtopic.php?t=45065
http://www.ccsinfo.com/forum/viewtopic.php?t=22789
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