Facing problem while reading GSM modem with pic16f877a

[thangapandi]

in starting of "GSM modem with TTL output",modem will send RDY,+CFUN: 1,+CPIN: NOT READY like as follows

0x0d 0x0a R D Y 0x0d 0x0a
0x0d 0x0a + C F U N : 1 0x0d 0x0a
0x0d 0x0a + C P I N : N O T R E A D Y 0x0d 0x0a


Through PIC i am able to read only upto " 0x0d 0x0a R D Y ".Remaining i am not able to read.i dont know what is the problem.
baud rate i used : 9600,null modem

[ALI_726]

[ezflyr]

Hi,

Actually, this is a forum for the CCS 'C' compiler, so if your GSM modem
question is not directly related to a CCS based project then you should
not feel free to ask your questions here, but rather you should find a
more appropriate forum.

John

[Ttelmah]

Actually, he is talking about having problems reading the result with a PIC (so hopefully CCS), unlike the other poster asking a GSM question.

My guess would be the input routines are not allowing for the line feed character. This is a common problem when parsing the data from modems. If you use the 'gets' function, the second return, will have an extra '0xa' at the front, making the string one character longer than expected, and the characters won't be in the locations expected.

I'd suggest two things:

1) Search the forum archives. There have been a lot of code pieces posted in the past showing approaches to this.
2) Assuming you _are_ using CCS, post the simplest possible code example showing what you are trying.

Best Wishes

[thangapandi]

I am using CCS compiler. I will post my sample code which I tried soon.

[ezflyr]

Well, it looks like I was correct, this really wasn't a CCS 'C' related question after all..... No code posted, no CCS version number given, so you've been called out!

John

[thangapandi]

problem got resolved,code implemented as follows

getch() //0x0d
getch() //0x0a
gets() //RDY + 0x0d
getch() //0x0a

[Ttelmah]

So, it was the extra line feed.
It is a common problem, with things sending line feed, plus carriage return, while gets, as implemented, only wants carriage return.

Best Wishes