Oops, that last posting of mine missed a middle bit out! It should have read more like below...
I've kludged the following code taken from here & there (plagiarism is alive & well!), towards getting the HSERIN working to fit my needs.
I'm using HSERIN to take 3 characters (which always will be numbers), input from my PC keyboard into my PIC. I'd then like to use these three separate numbers & combine them into a variable. All my serial end to end connectivity is is now working (no gobbledegook etc)...I'm happy with the signal flow aspect, fuses etc - ddata is moving to & fro fine - my query is now a basic simple programming one!
With HSERIN, I'd read that's it's best to have a 'trigger' character, followed on immdeiately by the actual data. So this is what I've done, when my PIC sees a leading 0, it takes in the folloiwing three bytes as a string. I need my 3 byte input string to be 3 actual numbers that my PIC program can act upon.
Here's what I'm doing .....
turns_required VAR BYTE[3] ; this is the user input for how many turns of a motor
direction_change var byte[3] ; again, user input for when the motor should change direction.
turns_required VAR BYTE[3]
counter var byte
counter = 0
pause 800 ; let things settle
HSEROUT [13,10]
HSEROUT ["Enter Number of turns required (with a leading 0)>>>", 13,10]
Main
HSERIN 5000,finish,[WAIT("0"),STR turns_required \3] ; wait for 3 bytes following the character '0;
HSEROUT ["Number of turns will be.... ", STR turns_required \3,13,10] ' oyutput it to screen to confirm
counter = turns_required ' this is the key bit that isn't working as turns_required is a string
count_loop:
counter = counter -1
HSEROUT [DEC COUNTER,13,10]
pause 200
GOTO count_loop
How can I convert my three character 'input' string (which will always be numbers) into an actual number that my program can use - I guess what i need is a way of converting a string into a number? (or perhaps a way of taking the input as raw number vs the string method I'm using?)
When I run the program, I can see the counter starts decrementing from a different number to that what I input (if for example I input 0032, the count below starts decrementing at 48, in fact it starts at 48 no matter what number I input!!)
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