RusPiRo MMIO Register

The crate provides macros to conviniently define memory mapped I/O (MMIO) registers.

Usage

To use this crate simply add the dependency to your Cargo.toml file:

toml [dependencies] ruspiro-mmio-register = "0.1.4"

The definition of MMIO registers is straight forward using the provided define_mmio_register! macro like so:

```rust use ruspirommioregister::*;

definemmioregister!( /// FOO Register with read/write access, 32 bit wide and mapped at memory /// address 0x3F200000 FOO@(0x3F200000)> { /// This register provides a field BAR at offset 0 covering 1 Bit BAR OFFSET(0), /// There is another field BAZ at offset 1 covering 3 Bits BAZ OFFSET(1) BITS(3), /// The third field BAL also has specific predefined values BAL OFFSET(4) BITS(2) [ /// Field Value 1 VAL1 = 0b01, /// Field Value 2 VAL2 = 0b10 ] } ); ```

Once the register is defined it can be used to read data from or write data to, depending on its type (ReadOnly, WriteOnly, ReadWrite).

```rust fn main() { // write a specific value to a field of the register FOO::Register.write_value( FOO::BAL::VAL1 );

// combine two field values with logical OR
FOO::Register.write_value( FOO::BAL::VAL1 | FOO::BAL::VAL2 );

// if there is no field defined for the MMIO register or raw value storage
// is preffered the raw value could be written
FOO::Register.write_value(FOO::BAZ::with_value(0b101));
FOO::Register.write(FOO::BAZ, 0b101);
FOO::Register.set(0x1F);

// reading from the MMIO register works in a simmilar way
let baz_val = FOO::Register.read(FOO::BAL); // return 0b01 or 0b10 eg.
let baz_field = FOO::Register.read_value(FOO::BAL); // returns a FieldValue
let raw_val = FOO::Register.get();

} ```

License

Licensed under Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0) or MIT (LICENSE-MIT or http://opensource.org/licenses/MIT)) at your choice.