ruduino/core_generator/gen.rs

241 lines
11 KiB
Rust

use avr_mcu::*;
use std::io;
use std::io::prelude::*;
pub fn write_registers(mcu: &Mcu, w: &mut dyn Write) -> Result<(), io::Error> {
for register in mcu.registers() {
let ty = if register.size == 1 { "u8" } else { "u16" };
// HACK: Skip, atmeg328p pack defines two of these.
if register.name == "GTCCR" { continue; }
writeln!(w, "pub struct {};", register.name)?;
writeln!(w)?;
writeln!(w, "impl {} {{", register.name)?;
for bitfield in register.bitfields.iter() {
// Create a mask for the whole bitset.
writeln!(w, " pub const {}: RegisterBits<Self> = RegisterBits::new(0x{:x});", bitfield.name, bitfield.mask)?;
// We create masks for the individual bits in the field if there
// is more than one bit in the field.
let mut current_mask = bitfield.mask;
let mut current_mask_bit_num = 0;
for current_register_bit_num in 0..15 {
if (current_mask & 0b1) == 0b1 {
writeln!(w, " pub const {}{}: RegisterBits<Self> = RegisterBits::new(1<<{});",
bitfield.name, current_mask_bit_num, current_register_bit_num)?;
current_mask_bit_num += 1;
}
current_mask >>= 1;
}
writeln!(w)?;
}
writeln!(w, "}}")?;
writeln!(w)?;
writeln!(w, "impl Register for {} {{", register.name)?;
writeln!(w, " type T = {};", ty)?;
writeln!(w, " const ADDRESS: *mut {} = 0x{:x} as *mut {};", ty, register.offset, ty)?;
writeln!(w, "}}")?;
}
Ok(())
}
pub fn write_pins(mcu: &Mcu, w: &mut dyn Write) -> Result<(), io::Error> {
if let Some(port) = mcu.peripheral("PORT") {
writeln!(w, "pub mod port {{")?;
writeln!(w, " use super::*;")?;
writeln!(w, " use crate::Pin;")?;
writeln!(w)?;
for instance in port.instances.iter() {
let port_letter = instance.name.chars().rev().next().unwrap();
for signal in instance.signals.iter() {
let idx = signal.index.expect("signal with no index");
let struct_name = format!("{}{}", port_letter, idx);
let io_module = mcu.modules.iter().find(|m| m.name == "PORT")
.expect("no port io module defined for this port");
let register_group = io_module.register_groups.iter()
.find(|rg| rg.name == instance.name)
.expect("no register group defined for this port");
writeln!(w, " pub struct {};", struct_name)?;
writeln!(w)?;
writeln!(w, " impl Pin for {} {{", struct_name)?;
for reg in register_group.registers.iter() {
let mut const_name = reg.name.clone();
const_name.pop(); // Pop port character from register name (DDRB/PORTB/etc)..
writeln!(w, " /// {}.", reg.caption)?;
writeln!(w, " type {} = {};", const_name, reg.name)?;
}
writeln!(w, " /// {}", signal.pad)?;
writeln!(w, " const MASK: u8 = 1<<{};", idx)?;
writeln!(w, " }}")?;
writeln!(w)?;
}
}
writeln!(w, "}}")?;
writeln!(w)?;
}
Ok(())
}
pub fn write_spi_modules(mcu: &Mcu, w: &mut dyn Write) -> Result<(), io::Error> {
if let Some(module) = mcu.module("SPI") {
let peripheral = mcu.peripheral("SPI").expect("found SPI module but no peripheral");
let port_peripheral = mcu.port_peripheral();
writeln!(w, "pub struct Spi;")?;
writeln!(w)?;
writeln!(w, "impl modules::HardwareSpi for Spi {{")?;
for spi_signal in peripheral.signals() {
let spi_signal_name = spi_signal.group.clone().expect("spi signal does not have group name");
let (port_instance, port_signal) = port_peripheral.instance_signal_with_pad(&spi_signal.pad)
.expect("no port signal associated with the spi signal pad");
let pin_name = self::pin_name(port_instance, port_signal);
let const_name = match &spi_signal_name[..] {
"MISO" => "MasterInSlaveOut",
"MOSI" => "MasterOutSlaveIn",
"SCK" => "Clock",
"SS" => "SlaveSelect",
_ => panic!("unknown spi signal name: '{}'", spi_signal_name),
};
writeln!(w, " type {} = {};", const_name, pin_name)?;
}
for reg in module.registers() {
let const_name = match &reg.caption[..] {
"SPI Data Register" => "DataRegister",
"SPI Status Register" => "StatusRegister",
"SPI Control Register" => "ControlRegister",
_ => panic!("unknown SPI module register: {}", reg.caption),
};
writeln!(w, " type {} = {};", const_name, reg.name)?;
}
writeln!(w, "}}")?;
writeln!(w)?;
}
Ok(())
}
pub fn write_usarts(mcu: &Mcu, w: &mut dyn Write) -> Result<(), io::Error> {
if let Some(module) = mcu.module("USART") {
for usart in module.register_groups.iter() {
writeln!(w, "/// The {} module.", usart.name)?;
writeln!(w, "pub struct {};", usart.name)?;
writeln!(w)?;
writeln!(w, "impl modules::HardwareUsart for {} {{", usart.name)?;
for register in usart.registers.iter() {
let reg_ty = if register.name.starts_with("UDR") { // the data register.
"DataRegister".to_owned()
} else if register.name.starts_with("UCSR") { // one of the three control/status registers.
let suffix = register.name.chars().rev().next().unwrap();
format!("ControlRegister{}", suffix)
} else if register.name.starts_with("UBRR") { // the baud rate register.
"BaudRateRegister".to_owned()
} else {
panic!("unknown usart register '{}'", register.name);
};
writeln!(w, " type {} = {};", reg_ty, register.name)?;
}
writeln!(w, "}}")?;
writeln!(w)?;
}
}
Ok(())
}
pub fn write_timers(mcu: &Mcu, w: &mut dyn Write) -> Result<(), io::Error> {
if let Some(tc) = mcu.module("TC8") { // Timer/Counter, 8-bit.
const TYPE_NAME: &'static str = "Timer8";
let find_reg = |name: &'static str| {
tc.registers().find(|r| r.name.starts_with(name))
.expect(&format!("could not find '{}' register", name))
};
let find_reg_suffix = |name: &'static str, suffix: &'static str| {
tc.registers().find(|r| r.name.starts_with(name) && r.name.ends_with(suffix))
.expect(&format!("could not find '{}' register", name))
};
let timer_number = find_reg("TIMSK").name.chars().last().unwrap()
.to_digit(10).unwrap();
writeln!(w, "/// 8-bit timer.")?;
writeln!(w, "pub struct {};", TYPE_NAME)?;
writeln!(w)?;
writeln!(w, "impl modules::Timer8 for {} {{", TYPE_NAME)?;
writeln!(w, " type CompareA = {};", find_reg_suffix("OCR", "A").name)?;
writeln!(w, " type CompareB = {};", find_reg_suffix("OCR", "B").name)?;
writeln!(w, " type Counter = {};", find_reg("TCNT").name)?;
writeln!(w, " type ControlA = {};", find_reg_suffix("TCCR", "A").name)?;
writeln!(w, " type ControlB = {};", find_reg_suffix("TCCR", "B").name)?;
writeln!(w, " type InterruptMask = {};", find_reg("TIMSK").name)?;
writeln!(w, " type InterruptFlag = {};", find_reg("TIFR").name)?;
writeln!(w, " const CS0: RegisterBits<Self::ControlB> = Self::ControlB::CS00;")?;
writeln!(w, " const CS1: RegisterBits<Self::ControlB> = Self::ControlB::CS01;")?;
writeln!(w, " const CS2: RegisterBits<Self::ControlB> = Self::ControlB::CS02;")?;
writeln!(w, " const WGM0: RegisterBits<Self::ControlA> = Self::ControlA::WGM00;")?;
writeln!(w, " const WGM1: RegisterBits<Self::ControlA> = Self::ControlA::WGM01;")?;
writeln!(w, " const WGM2: RegisterBits<Self::ControlB> = Self::ControlB::WGM020;")?;
writeln!(w, " const OCIEA: RegisterBits<Self::InterruptMask> = Self::InterruptMask::OCIE{}A;", timer_number)?;
writeln!(w, "}}")?;
}
if let Some(tc) = mcu.module("TC16") { // Timer/Counter, 16-bit.
const TYPE_NAME: &'static str = "Timer16";
let find_reg = |name: &'static str| {
tc.registers().find(|r| r.name.starts_with(name))
.expect(&format!("could not find '{}' register", name))
};
let find_reg_suffix = |name: &'static str, suffix: &'static str| {
tc.registers().find(|r| r.name.starts_with(name) && r.name.ends_with(suffix))
.expect(&format!("could not find '{}' register", name))
};
let timer_number = find_reg("TIMSK").name.chars().last().unwrap()
.to_digit(10).unwrap();
writeln!(w, "/// 16-bit timer.")?;
writeln!(w, "pub struct {};", TYPE_NAME)?;
writeln!(w)?;
writeln!(w, "impl modules::Timer16 for {} {{", TYPE_NAME)?;
writeln!(w, " type CompareA = {};", find_reg_suffix("OCR", "A").name)?;
writeln!(w, " type CompareB = {};", find_reg_suffix("OCR", "B").name)?;
writeln!(w, " type Counter = {};", find_reg("TCNT").name)?;
writeln!(w, " type ControlA = {};", find_reg_suffix("TCCR", "A").name)?;
writeln!(w, " type ControlB = {};", find_reg_suffix("TCCR", "B").name)?;
writeln!(w, " type ControlC = {};", find_reg_suffix("TCCR", "C").name)?;
writeln!(w, " type InterruptMask = {};", find_reg("TIMSK").name)?;
writeln!(w, " type InterruptFlag = {};", find_reg("TIFR").name)?;
writeln!(w, " const CS0: RegisterBits<Self::ControlB> = Self::ControlB::CS10;")?;
writeln!(w, " const CS1: RegisterBits<Self::ControlB> = Self::ControlB::CS11;")?;
writeln!(w, " const CS2: RegisterBits<Self::ControlB> = Self::ControlB::CS12;")?;
writeln!(w, " const WGM0: RegisterBits<Self::ControlA> = Self::ControlA::WGM10;")?;
writeln!(w, " const WGM1: RegisterBits<Self::ControlA> = Self::ControlA::WGM11;")?;
writeln!(w, " const WGM2: RegisterBits<Self::ControlB> = Self::ControlB::WGM10;")?;
writeln!(w, " const WGM3: RegisterBits<Self::ControlB> = Self::ControlB::WGM11;")?;
writeln!(w, " const OCIEA: RegisterBits<Self::InterruptMask> = Self::InterruptMask::OCIE{}A;", timer_number)?;
writeln!(w, "}}")?;
}
Ok(())
}
/// Gets the name of a pin.
fn pin_name(instance: &Instance, signal: &Signal) -> String {
let idx = signal.index.expect("signal with no index");
let letter = instance.name.chars().rev().next().unwrap();
format!("port::{}{}", letter, idx)
}