Pic18F4550 + SIMCOM SIM900D GSM/GPRS

[ScaleRobotics]

Hi tacbanon,

I loaded your code from post 19 into a circuit here, and tested hserout with your settings. I couldn't seem to get anything out, unless I removed your brown out reset in the configs.

If you change this line, does it help anything?

; __CONFIG _CONFIG2L, _PWRT_ON_2L & _BOR_ON_2L & _BORV_2_2L & _VREGEN_ON_2L
__CONFIG _CONFIG2L, _PWRT_ON_2L & _BOR_OFF_2L & _VREGEN_ON_2L

As a side note, for 115200 baud on earlier code, I had to use:
'DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
'DEFINE HSER_TXSTA 20h ' Enable transmit, BRGH = 0
'DEFINE HSER_CLROERR 1 ' Clear overflow automatically
'DEFINE HSER_SPBRG 25 ' 115200 Baud @ 48MHz, 0.16%

[pedja089]

Modem can draw up to 2A. So if you supply pic and modem from same power supply maybe voltage drops and lock your pic.

[tacbanon]

Hi tacbanon,

I loaded your code from post 19 into a circuit here, and tested hserout with your settings. I couldn't seem to get anything out, unless I removed your brown out reset in the configs.

If you change this line, does it help anything?

; __CONFIG _CONFIG2L, _PWRT_ON_2L & _BOR_ON_2L & _BORV_2_2L & _VREGEN_ON_2L
__CONFIG _CONFIG2L, _PWRT_ON_2L & _BOR_OFF_2L & _VREGEN_ON_2L

As a side note, for 115200 baud on earlier code, I had to use:
'DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
'DEFINE HSER_TXSTA 20h ' Enable transmit, BRGH = 0
'DEFINE HSER_CLROERR 1 ' Clear overflow automatically
'DEFINE HSER_SPBRG 25 ' 115200 Baud @ 48MHz, 0.16%

Hello ScaleRobotics, That did it...yipee!
Thanks to you and thanks to everyone in the forum..

Regards,
tacbanon