Module `pin` - Procs for low-level digital manipulation of pins on any ATmega

Index

INLINE PROC pin.write (VAL INT r.port, bit, state)

Sets the state of a pin to either HIGH or LOW.

Typically, no user is going to directly call this PROC. The process of locating r.port is taken care of in the Architecture-specific chipmap.module.

`VAL INT`	`r.port`	The port (PORTB, PORTC, etc.) on the ATmega
`VAL INT`	`bit`	The bit in the port (0 - 7)
`VAL INT`	`state`	Either HIGH or LOW

INLINE PROC pin.read (VAL INT r.pin, bit, RESULT INT state)

Reads the state of a PIN register. Either HIGH or LOW.

Typically, no user is going to directly call this PROC. The process of locating r.pin is taken care of in the Architecture-specific chipmap.module.

`VAL INT`	`r.pin`	A pin register (PINA, PINB)
`VAL INT`	`bit`	The bit in the port
`RESULT INT`	`state`	The state of the bit (HIGH or LOW)

INLINE PROC pin.mode (VAL INT r.ddr, bit, mode)

Sets the direction of the pin (INPUT or OUTPUT)

Typically, no user is going to directly call this PROC. The process of locating r.ddr is taken care of in the Architecture-specific chipmap.module.

`VAL INT`	`r.ddr`	The data direction register (DDRA, etc.)
`VAL INT`	`bit`	The bit in the register
`VAL INT`	`mode`	Either INPUT or OUTPUT