BasicMicro - Forums

Shifting the line low and then high is important because the process is initiated when the shift to low is detected. I was using line 8 on the original posting and the timing is an issue unless you monitor the lines to determine when the process is complete. By inserting a 1 second delay you can ensure that the operation is complete before initiating another task. You must also take note of the shiftin/shiftout commands because they default to 16 bits instead of 8 as with the BS2. Below is an example of some code that works very well, but timing delays can be changed to suit your system requirements. The code below uses port 0 shifting low and then high to get ready for the next shift command and does an APC read.

APCREAD:
'POWER UP ISD
HIGH 0:PAUSE 2
LOW 0:PAUSE 2
SHIFTOUT MOSI,SCLK,LSBFIRST,[17\8,0\8]:HIGH 0:PAUSE 2
'RD_APC
LOW 0:PAUSE 2
SHIFTOUT MOSI,SCLK,LSBFIRST,[68\8,0\8,0\8,0\8]:HIGH 0:PAUSE 2
'DISPLAY MISO DATA FOR APC
LOW 0:PAUSE 2
SHIFTIN MISO,SCLK,LSBFIRST,[MISODAT1,MISODAT2,MISODAT3,MISODAT4]:HIGH 0:PAUSE 2

Thanks for the input.

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Harley

Hmm, what version of BasicMicro Studio are you using? I changed the shiftin/out commands to default to 8bits a long time ago.

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Tech Support
Basic Micro - Robotic Technology Evolved

The code was developed quite awhile ago and I haven't revisited the issue since. Its good to know that it was changed and I think the code will be ok even though I specify 8 bits. Thanks and I will note the change. I am now using a much newer version. I haven't checked for the newest version for awhile and probably should do so.

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Harley

Yes, you can still explicitly set 8 bits. It just makes it more BS2 compatible to default to 8bits which is why we changed it.

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Tech Support
Basic Micro - Robotic Technology Evolved

Thanks and good job. Many of us started with the BS2 so the more compatible it is, the easier to transition. Appreciate your efforts!

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Harley