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jcerbaro
Joined: 23 Jun 2016
Posts: 2
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| SERIAL RS232 problem |
 Posted: Sun Jun 26, 2016 6:46 pm |
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Hello!
I want to send a NUMBER (from 0 to 255) via serial port, from my PC.
I tried in every way, but it's not working!
Let's say the number I want is 123 (decimal).
The serial won't never send the CHAR from the ASCII equivalent of 123. It will send '1' , '2' , '3'.
So... I must detect the arriving of the three chars and send them to a vector for later turn it into the integer 123.
My idea below is not working. Please, I really need some help!
PS: if someone can give me an ideia of how I can force the serial do send the CHAR 123, instead of '1', '2', '3', would be great.
| Code: | #int_rda
void uart_read(void)
{
received = getc();
uart_int[j] = received - 48;
j++;
if (j == 4)
j=0;
//At this point, my vector uart_int should always have the received characters, one in each position.
} |
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asmboy
Joined: 20 Nov 2007
Posts: 2128
Location: albany ny
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| Posted: Sun Jun 26, 2016 7:04 pm |
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| it does not compile. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Jun 26, 2016 8:01 pm |
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| Quote: |
how I can force the serial do send the CHAR 123, instead of '1', '2', '3',
would be great. |
Use putc() to send the byte. Example:
| Code: | int8 value;
value = 123;
putc(value); |
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