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Merge pull request #1988 from JuliDi/expose-analog-switch-pins-rebased

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[STM32] Handle STM32H7 "_C" pins (rebased)
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xoviat 2023-10-01 12:36:21 +00:00 committed by GitHub
commit 70005c3956
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3 changed files with 120 additions and 5 deletions
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21
embassy-stm32/Cargo.toml
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@ -59,7 +59,7 @@ sdio-host = "0.5.0"
embedded-sdmmc = { git = "https://github.com/embassy-rs/embedded-sdmmc-rs", rev = "a4f293d3a6f72158385f79c98634cb8a14d0d2fc", optional = true }
critical-section = "1.1"
atomic-polyfill = "1.0.1"
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-735cab337aad6161f3d6bcf3e49cd1f034bc3130" }
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-8ee2862086886cd8ebaf5fd5e3bd6cfbe5baa840" }
vcell = "0.1.3"
bxcan = "0.7.0"
nb = "1.0.0"
@ -78,7 +78,8 @@ critical-section = { version = "1.1", features = ["std"] }
[build-dependencies]
proc-macro2 = "1.0.36"
quote = "1.0.15"
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-735cab337aad6161f3d6bcf3e49cd1f034bc3130", default-features = false, features = ["metadata"]}
stm32-metapac = { git = "https://github.com/embassy-rs/stm32-data-generated", tag = "stm32-data-8ee2862086886cd8ebaf5fd5e3bd6cfbe5baa840", default-features = false, features = ["metadata"]}
[features]
default = ["rt"]
@ -134,6 +135,22 @@ time-driver-tim12 = ["_time-driver"]
time-driver-tim15 = ["_time-driver"]
#! ## Analog Switch Pins (Pxy_C) on STM32H7 series
#! Get `PXY` and `PXY_C` singletons. Digital impls are on `PXY`, Analog impls are on `PXY_C`
#! If disabled, you get only the `PXY` singleton. It has both digital and analog impls.
## Split PA0
split-pa0 = ["_split-pins-enabled"]
## Split PA1
split-pa1 = ["_split-pins-enabled"]
## Split PC2
split-pc2 = ["_split-pins-enabled"]
## Split PC3
split-pc3 = ["_split-pins-enabled"]
## internal use only
_split-pins-enabled = []
#! ## Chip-selection features
#! Select your chip by specifying the model as a feature, e.g. `stm32c011d6`.
#! Check the `Cargo.toml` for the latest list of supported chips.

92
embassy-stm32/build.rs
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@ -81,6 +81,59 @@ fn main() {
singletons.push(c.name.to_string());
}
let mut pin_set = std::collections::HashSet::new();
for p in METADATA.peripherals {
for pin in p.pins {
pin_set.insert(pin.pin);
}
}
struct SplitFeature {
feature_name: String,
pin_name_with_c: String,
pin_name_without_c: String,
}
// Extra analog switch pins available on most H7 chips
let split_features: Vec<SplitFeature> = vec![
#[cfg(feature = "split-pa0")]
SplitFeature {
feature_name: "split-pa0".to_string(),
pin_name_with_c: "PA0_C".to_string(),
pin_name_without_c: "PA0".to_string(),
},
#[cfg(feature = "split-pa1")]
SplitFeature {
feature_name: "split-pa1".to_string(),
pin_name_with_c: "PA1_C".to_string(),
pin_name_without_c: "PA1".to_string(),
},
#[cfg(feature = "split-pc2")]
SplitFeature {
feature_name: "split-pc2".to_string(),
pin_name_with_c: "PC2_C".to_string(),
pin_name_without_c: "PC2".to_string(),
},
#[cfg(feature = "split-pc3")]
SplitFeature {
feature_name: "split-pc3".to_string(),
pin_name_with_c: "PC3_C".to_string(),
pin_name_without_c: "PC3".to_string(),
},
];
for split_feature in &split_features {
if pin_set.contains(split_feature.pin_name_with_c.as_str()) {
singletons.push(split_feature.pin_name_with_c.clone());
} else {
panic!(
"'{}' feature invalid for this chip! No pin '{}' found.\n
Found pins: {:#?}",
split_feature.feature_name, split_feature.pin_name_with_c, pin_set
)
}
}
// ========
// Handle time-driver-XXXX features.
@ -679,7 +732,16 @@ fn main() {
let key = (regs.kind, pin.signal);
if let Some(tr) = signals.get(&key) {
let mut peri = format_ident!("{}", p.name);
let pin_name = format_ident!("{}", pin.pin);
let pin_name = {
// If we encounter a _C pin but the split_feature for this pin is not enabled, skip it
if pin.pin.ends_with("_C") && !split_features.iter().any(|x| x.pin_name_with_c == pin.pin) {
continue;
}
format_ident!("{}", pin.pin)
};
let af = pin.af.unwrap_or(0);
// MCO is special
@ -716,7 +778,13 @@ fn main() {
}
let peri = format_ident!("{}", p.name);
let pin_name = format_ident!("{}", pin.pin);
let pin_name = {
// If we encounter a _C pin but the split_feature for this pin is not enabled, skip it
if pin.pin.ends_with("_C") && !split_features.iter().any(|x| x.pin_name_with_c == pin.pin) {
continue;
}
format_ident!("{}", pin.pin)
};
// H7 has differential voltage measurements
let ch: Option<u8> = if pin.signal.starts_with("INP") {
@ -866,13 +934,31 @@ fn main() {
for pin_num in 0u32..16 {
let pin_name = format!("P{}{}", port_letter, pin_num);
pins_table.push(vec![
pin_name,
pin_name.clone(),
p.name.to_string(),
port_num.to_string(),
pin_num.to_string(),
format!("EXTI{}", pin_num),
]);
// If we have the split pins, we need to do a little extra work:
// Add the "_C" variant to the table. The solution is not optimal, though.
// Adding them only when the corresponding GPIOx also appears.
// This should avoid unintended side-effects as much as possible.
#[cfg(feature = "_split-pins-enabled")]
for split_feature in &split_features {
if split_feature.pin_name_without_c == pin_name {
pins_table.push(vec![
split_feature.pin_name_with_c.to_string(),
p.name.to_string(),
port_num.to_string(),
pin_num.to_string(),
format!("EXTI{}", pin_num),
]);
}
}
}
}

12
embassy-stm32/src/lib.rs
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@ -191,6 +191,18 @@ pub fn init(config: Config) -> Peripherals {
peripherals::FLASH::enable();
unsafe {
#[cfg(feature = "_split-pins-enabled")]
crate::pac::SYSCFG.pmcr().modify(|pmcr| {
#[cfg(feature = "split-pa0")]
pmcr.set_pa0so(true);
#[cfg(feature = "split-pa1")]
pmcr.set_pa1so(true);
#[cfg(feature = "split-pc2")]
pmcr.set_pc2so(true);
#[cfg(feature = "split-pc3")]
pmcr.set_pc3so(true);
});
gpio::init();
dma::init(
#[cfg(bdma)]