fusible 0.20.5

Electronic linter: a fuse that blows to block firmware code generation
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//! Central database of microcontroller silicon targets.

/// Builds a `MuxFunction` table entry.
macro_rules! mux {
    ($sig:expr, $af:expr, $name:expr) => {
        $crate::silicon::model::MuxFunction {
            signal: $sig,
            af_number: $af,
            af_name: $name,
        }
    };
}

/// Builds a `PinSpec` for a numbered GPIO, with an
/// optional strapping requirement.
macro_rules! gpio_pin {
    ($n:expr, $name:expr, $caps:expr, $funcs:expr) => {
        $crate::silicon::model::PinSpec {
            gpio: Some($crate::silicon::model::GpioNum($n)),
            name: $name,
            capabilities: $caps,
            strapping: None,
            functions: $funcs,
        }
    };
    ($n:expr, $name:expr, $caps:expr, $funcs:expr, $strap:expr) => {
        $crate::silicon::model::PinSpec {
            gpio: Some($crate::silicon::model::GpioNum($n)),
            name: $name,
            capabilities: $caps,
            strapping: Some($strap),
            functions: $funcs,
        }
    };
}

/// Builds a `PinSpec` for a port/pin designator
/// without a GPIO number.
macro_rules! port_pin {
    ($name:expr, $caps:expr, $funcs:expr) => {
        $crate::silicon::model::PinSpec {
            gpio: None,
            name: $name,
            capabilities: $caps,
            strapping: None,
            functions: $funcs,
        }
    };
}

pub mod esp32s3;
pub mod rp2040;
pub mod stm32;

use super::model::SiliconTarget;

/// Resolves an exact microcontroller chip ID to its static silicon database
/// definition.
///
/// Matching is case-insensitive and ignores `-`, `_` and spaces, so
/// `ESP32-S3`, `esp32s3` and `esp32_s3` all resolve. STM32G431 also accepts
/// its package/flash suffixes (`stm32g431cb`, `stm32g431kb`, ...) and, for the
/// 48-pin parts, the package letter (`stm32g431cbu` UFQFPN48, `stm32g431cby`
/// WLCSP49, `stm32g431cbt` LQFP48). Any other
/// chip, including other members of the same family, returns `None`.
pub fn find_target(query: &str) -> Option<&'static SiliconTarget> {
    let clean: String = query
        .trim()
        .chars()
        .filter(|c| !matches!(c, '-' | '_' | ' '))
        .map(|c| c.to_ascii_lowercase())
        .collect();

    match clean.as_str() {
        "rp2040" => Some(&rp2040::RP2040),
        "esp32s3" => Some(&esp32s3::ESP32S3),
        _ => stm32g431(clean.strip_prefix("stm32g431")?),
    }
}

fn stm32g431(suffix: &str) -> Option<&'static SiliconTarget> {
    let (package, flash) = match suffix.as_bytes() {
        [] => return Some(&stm32::STM32G431),
        [package, flash] => (package, flash),
        [b'c', flash, b't'] => (&b'c', flash),
        [b'c', flash, b'u'] => {
            return b"68b".contains(flash).then_some(&stm32::STM32G431CU);
        }
        [b'c', flash, b'y'] => {
            return b"68b".contains(flash).then_some(&stm32::STM32G431CY);
        }
        _ => return None,
    };
    if !b"68b".contains(flash) {
        return None;
    }
    match package {
        b'k' => Some(&stm32::STM32G431K),
        b'c' => Some(&stm32::STM32G431C),
        b'r' => Some(&stm32::STM32G431R),
        b'm' => Some(&stm32::STM32G431M),
        b'v' => Some(&stm32::STM32G431V),
        _ => None,
    }
}