I've been writing a driver for the GPIO as implemented by the FPGA on the net6501 and I was wondering if someone (Soren?) could clarify the purpose of some of the I/O ports.
>From the archive, I have the following information regarding the GPIO: > I/O Port 0680 bit 15..0 gpio input > 0684 bit 15..0 gpio output > 0688 bit 15..0 gpio reset bit when '1' > 068C bit 15..0 gpio set bit when '1' > 0690 bit 15..0 gpio dir '0'=input, '1'=output The first, second and fifth I/O ports seem fairly obvious; read state from the first, write state to the second in the case of output pins and change the direction with the fifth but I can't work out what the third and fourth I/O ports are used for, they always seem to read as 0. Could someone explain how they're supposed to be used? Matt -- "Never rub another man's rhubarb." _______________________________________________ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
