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Siemens modems usually includes a complete 16C550 compatible serial ports
(comm signals + control signals) that can be configured with jumpers.
Could you pls tell us a full description of the mo ...

Siemens modems usually includes a complete 16C550 compatible serial ports
(comm signals + control signals) that can be configured with jumpers.
Could you pls tell us a full description of the mo ...

Hi,ckielstra,
Thanks. I have tried the ERRORS but still doesnt work. The code is really as simple as standard one:

#use rs232(baud=115200, parity=N, BITS=8, xmit=TXD2, rcv=RXD2)

#byte R ...

Hi, asmallri,
Thank you also!

Thank you, ckielstra!
Your problem description is indeed not very clear, but
1) You are using the hardware UART of the PIC?
2) Your program is working when using a MAX232 to a PC?
3) This same pr ...

Thank you, ckielstra!
Your problem description is indeed not very clear, but I've got an idea what your problem might be. First let me confirm the following:
1) You are using the hardware UART of th ...

Hi,

I don't think you can use getc() function to receive a string like "OK", for this you need to use gets().

getc() only receives a single character, whereas gets() an entire string...

Also ...

If you have a scope, check the voltage level on the pin. The default 'receive' input voltage for the idle state (high), is 0.8 of the supply voltage. The 'high' input for a MAX232 (assuming this is wh ...

Hi, there,
i got a very confusing problem. I am sure that the data reached my pic RECV pin (i use a transmitter circuit to tap out and dump to pc COM port, i can see all the data correctly), but my k ...

Hi, there!

Now i have found out the reason, it is because my pic directly connect to GPRS modem (i m not using NIC), so there is not a "retransmit" mechanism on the virtural MAC layer to retra ...

Hi, There!
i have built in a tcp stack which uses the ported tcp for CCS from Microchip TCP/IP stack. my pic now works as client, it works fine just except one "small" problem, if anyone has the ...

HI,
There! I am so sorry that i came back to this forum so late, cos leave for quite time.

For the problem of the RAM size of pic18f452, i have to modify the RWIN size for the receive window ...

Hi, there.
I have built in a tcp/ip ppp protocol stack on pic18f452 which is connected with a GPRS modem through RS232. As is known, the standard buffer of tcp/ip protocol stack should be 1024 b ...

actually at the very beginning i also tried on the iosoft's code, but seems no luck, so later on i switched to microchip's one.
the Tick.c in microchip's stack did use Timer_ISR.

one more thing i ...

My ccs version is PCH 3.184.
The stacktask of microchip looks like:

switch(smStack)
{
case SM_STACK_IDLE:
case SM_STACK_MAC:
.. ...