| View previous topic :: View next topic |
| Author |
Message |
cstan_02
Joined: 24 Jul 2005
Posts: 13
|
| RF Module via RS-232 Help & suggestion. |
 Posted: Thu Oct 06, 2005 2:46 am |
 |
|
| Code: |
//This routine tries to get the status of the Aerocomm module.
//The UART of PIC is set to the AC4424's default baud rate of 115200bps
int1 _AC4424_stat(int8 mode){
char cmd[3]; int i;
//Now we initialize the array for the command.
cmd[0] = 0xCC;
cmd[1] = 0x00;
cmd[2] = 0x00;
// Delay for a second just to make sure that the transmit buffer is empty.
delay_ms(1000);
// Bring down the Command/Data pin to LOW
output_low(_4424_CMDDAT);
// Clear CTS.
while( input(_4424_CTS));
// Disable RTS.
output_low(_4424_RTS);
delay_us(100);
printf(out_soft_uart,"CMD_S0"); // This is debug code;
//Sending the command
for (i=0; i<=2; i++){
out_uart(cmd[i]);
}
//Waiting for the reply.
while(!kbhit(RAD24)); // the wait never ends. The UART is fully functional. Nothing is
//returned by the AC4424 but it continues to receive data without fail.
// If it gets a reply, print it out.
while(kbhit(RAD24)) printf(out_soft_uart,"%d",(fgetc(RAD24)));
delay_ms(100);
printf(out_soft_uart,"\tREP\t"); // THIS is debug code.
// Pull the command/data pin high, thereby exiting the command mode.
output_high(_4424_CMDDAT);
return(TRUE);
}
|
The problem is with configuring the AC4424 module. Seems like AC4424 never heard my commands. The data-sheet here never specifies anything in particular.
Any help or suggestions are welcome.
_________________
-cstan
.................................................
Your Mind Is Your Biggest Asset !!
................................................. |
|
 |
arunb
Joined: 08 Sep 2003
Posts: 492
Location: India
|
| RE |
| Posted: Thu Oct 06, 2005 10:28 pm |
|
|
Hi,
Is the PIC configured for 115200 baud, is it possible to settle for a lower speed like 9600 baud. ??
Also ensure the data is being sent from the PIC.
thanks
arunb |
|
|
cstan_02
Joined: 24 Jul 2005
Posts: 13
|
| RF Module via RS-232 Help & suggestion. |
| Posted: Fri Oct 07, 2005 6:53 am |
|
|
Hello arun,
Thanks for your input. But I'm using the harware uart and I don't think the baud rate should be a problem. Anyway I suspect some harware problems, as i cannot see anything in software. Have done wireless projects before ??
Thanks.
_________________
-cstan
.................................................
Your Mind Is Your Biggest Asset !!
................................................. |
|
|
arunb
Joined: 08 Sep 2003
Posts: 492
Location: India
|
| RE: |
| Posted: Fri Oct 07, 2005 8:27 am |
|
|
Hi cstan_02,
Not exactly...But you need to setup the baud rate in the PIC .
thanks
arunb |
|
|
Humberto
Joined: 08 Sep 2003
Posts: 1215
Location: Buenos Aires, La Reina del Plata
|
|
| Posted: Fri Oct 07, 2005 8:58 am |
|
|
As @arunb told you, first try to comunicate at 9600 Bauds.
| Quote: |
The problem is with configuring the AC4424 module. Seems like AC4424 never heard my commands. The data-sheet here never specifies anything in particular.
|
You will get the User Manual here:
http://www.aerocomm.com/Docs/User_Manual_AC4424.pdf
and if you read in Page 24:
5.1.5 9600 Baud/Packet Frame (Pin 12)9600_BAUD -
When pulled logic Low before applying power or resetting the transceiverīs
serial interface is forced to a 9600, 8-N-1 rate.
Also be aware that in the Hardware Interface description (Page 23) says:
The AC4424 accepts 5V TTL level in the RXD pin.
Humberto |
|
|
cstan_02
Joined: 24 Jul 2005
Posts: 13
|
| RF Module via RS-232 Help & suggestion. |
| Posted: Fri Oct 07, 2005 7:53 pm |
|
|
Many thanks to arun and humberto. But I found out my problem's with some uart routines. The Aercomm user manual says that there should not be any delays when sending command characters while in command mode.
Thanks.
_________________
-cstan
.................................................
Your Mind Is Your Biggest Asset !!
................................................. |
|
|
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
