Using C macros is it possible to extract the port information from the text of the pin name and use it to set the port and ddr. If it were possible to pull the "D" from the second character of PD1 you could use it to make PORTD out of PORT+character.
For example:
#define DDR(x) (something)
#define PORT(x) (something)
#define PIN(x) (something)
#define CLK PD0
#define SWITCH PB3
void foo()
{
DDR( CLK) |= (1<<CLK); // set clock pin for output
DDR( SWITCH) &= ~(1<<SWITCH);; // set switch pin for input
PORT( SWITCH) |= (1<<SWITCH); // set switch pullup
PORT( CLK) ^= (1<<CLK); // toggle clock output
if( PIN( SWITCH) & (1<<SWITCH))
{
// blah, blah
}
}
Is something like that possible?
