Re: Aux I/O not responding

Hello Scott

Thanks for your reply. I have amended the SendToOLED function, but there
is still not response from the Rabbit. I am using the Digital I/O board
with the developemet kit, and I also have a MSO picoscope connected to
the required pins, but there is no response read by the picoscope.

If I may ask, how do you programme the RCM6700 up to carry out these
functions, because I have read the manuals, and even the  Dynamic C10.72
does not recognise the IOPCR ad IBxER registers. Is there something I am
missing out? I'm just so confused sine there is no tutorial anywhere
(even YouTube) talking about the Rabbit microprocessor.

Thanks a lot, and look forward to your reply.

Taiwo.


--- In [email protected], Scott Henion wrote:
>
> On 8/2/2013 10:07 AM, Taiwo wrote:
> > Hello guys
> >
> > I'm quite new to the Rabbit MCU. I have been trying to send some
> > messages to an OLED through the aux I/O pins, but none of the pins
> > associated with the Aux I/O are responsding (including /IORD and
/IOWR).
> > I have macro definition at the start of the source file, amongst
others.
> > Please what am I missing out in the source file.
> >
> > Below is a brief description of my file.
> >
> >
> >
> > #define PORTA_AUX_IO // Enable the external I/O bus
> >
> > void SendToOLED(int addr, char value)
> > {
> > WrPortE(addr, NULL, value);
> > }
> >
> >
> > int main()
> > {
> > WrPortI(IB7CR, &IB7CRShadow, 0x4C); // Invert
> >
> > // Ensure tht the 6-bit address external I/O bus is enabled
> > MsDelay(1000); // Wait for one second to allow OLED to reset
> > itself
> >
> > SendToOLED(1, '\B00111001'); // 8-bit, 2 line, 5x8 dots, Western
> > European font
> > SendToOLED(1, '\B00001100'); // Display On, Cursor Off, Non-Blinking
> > cursor
> > SendToOLED(1, '\B00000110'); // Increment and Non-shift Entire
> > Display
> > }
>
> The address for the external I/O is:
>
> PE0 - 0000-1FFF
> PE1 - 2000-3FFF
> ... and so on...
> PE6 - C000-DFFF
> PE7 - E000-FFFF
>
> So try:
>
> void SendToOLED(int addr, char value)
> {
> WrPortE(addr+0xE000, NULL, value);
> }
>
>
> You will probably need to add checks to make sure the display is ready
> to write to. Add a check for the ready bit in the display status
> register before writing or you could just add delays if you can't read
> the display.
>
>
>
>
>
> --
> ------------------------------------------
> Scott G. Henion, Consultant
> Web site: http://SHDesigns.org
> ------------------------------------------
>