PIC to serial with visual basic

[skimask]

Did you switch to 2400 baud?
Did you read the manual where it says that 9600 baud might not be possible at 4mhz?

[mbw123]

Yeah, I switched it to 2400 baud rate and turned off the handshake. Maybe the visual basic code is wrong or the code on the PIC should be "if OK = 4" instead of 4 being in quotation marks. Or am I missing something that's staring me in the face?

Thanks for the help.

-Mike

[skimask]

Yeah, I switched it to 2400 baud rate and turned off the handshake. Maybe the visual basic code is wrong or the code on the PIC should be "if OK = 4" instead of 4 being in quotation marks. Or am I missing something that's staring me in the face?

Thanks for the help.

-Mike

Try this. It echo's everything you type on hyperterminal, but echo the same character 3 times and toggle the led every time you hit a key, that way you know it's really working..

Include "modedefs.bas"
DEFINE OSC 4
rx var portc.7 : output rx : tx var portc.6 : input tx
led var portd.2 : output led : serialdata var byte : ADCON1 = $F
main:
toggle led 'just show the program is running
serin rx , N2400 , serialdata
serout tx , n2400 , [ serialdata , serialdata , serialdata ]
goto main


Once again, you break it down, make it super simple, then build it back up...

[sougata]

Hi,

Here is a portion from the PBP manual

Since the serial reception is done in hardware, it is not possible to set
the levels to an inverted state to eliminate an RS-232 driver. Therefore
a suitable driver should be used with HSERIN.

Any idea what this means ? I don't know or may be I do

Using the hardware pins with a software serial (inverted) works but makes no sense as anyway you don't use the hardware peripheral. So time to spend on MAX or be happy with soft serial.

[skimask]

Hi,

Here is a portion from the PBP manual


Any idea what this means ? I don't know or may be I do

Using the hardware pins with a software serial (inverted) works but makes no sense as anyway you don't use the hardware peripheral. So time to spend on MAX or be happy with soft serial.

Sure ya do. HSERIN/OUT uses the UART, which is monitored by PBP for input/output. So you need the correct RS232 voltages...