Convert ASCII String into Integer

SailerMan · 2006-11-10 16:13

I am using a Maxbotic Sonar the I have Choices of Output Serial, PWM or Analog. I used the PWM and now I'm attemping serial.

The data is Sent "R065\r"· 065 is the range in Inches.

I am reading the 065 into a short array and then Adding the Elements as so..
Repeat Index From 0 to 2
·· R[noparse][[/noparse]Index]=Serial.RX-48··· '<

FORGOT TO SUBTRACT 48

Range:=R[noparse][[/noparse]0]*100+R[noparse][[/noparse]1]*10+R[noparse][[/noparse]2]

It works but I'm wondering if there Is·a better way to handle this?

Thanks,
Eric

Post Edited (SailerMan) : 11/10/2006 5:19:39 PM GMT

Mike Green · 2006-11-10 16:28

If I understand your serial data, what you've posted can't work because the bytes are ASCII characters, not binary digits and you have to compensate for the extra $30 ("0") value. If you know you're going to receive a digit string terminated by a return, you can convert on the fly:

Range := 0
repeat until (d := Serial.RX) == $0D
  Range := Range * 10 + (d - "0")

SailerMan · 2006-11-10 17:18

Sorry for not being clear..You are totally correct in my code above.

This is closer to my actual code

If Serial.RX=="R"
   Repeat Index from 0 to 2
      R[noparse][[/noparse]Index]=Serial.RX-48

Range:= R[noparse][[/noparse]0]*100+R*10+R

I like your approach much better plus it helps me think outside of my little obscure box.

If I understand your code it looks like a SHL·for Decimal.. Sheesh why didn't I think of that...

Thanks for your help,
Eric

Post Edited (SailerMan) : 11/10/2006 5:26:40 PM GMT

Mike Green · 2006-11-10 19:05

Yeah, the same logic works for any base (binary, hexadecimal, etc.)

Convert ASCII String into Integer

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