Re: Aux I/O not responding

Hello Steve

Thanks for your reply. I enabled Parallel Port A to serve as the
auxiliary I/O by defining the macro (PORTA_AUX_IO ) at the start of the
programme, and I have lso tried enabling it by writing the specified
bits to the SPCR register, but all to no avail.  I will still keep
working on  it.

Have a nice week ahead

Taiwo


--- In [email protected], Steve Trigero wrote:
>
> Did you enable port A?
> Â
> Â // Set port A as the I/O data bus & Port B as the I/O Address
bus. WrPortI( SPCR, &SPCRShadow, 0x8C); // Enable I/O bank, 3
waitstates, chip select, permit write WrPortI(IB7CR, &IB7CRShadow,
0x88);// I/O Bank bit 7, port E, I/O strobe
> Â
>
>
> >________________________________
> > From: Taiwo taiwo_ososanya@...
> >To: [email protected]
> >Sent: Friday, August 2, 2013 7:07 AM
> >Subject: [rabbit-semi] Aux I/O not responding
> >
> >Â
> >
> >
> >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
> >}
> >
> >
> >
>