add gpio abstraction
parent
e4478c3efd
commit
5f3d674e24
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@ -94,6 +94,15 @@ dependencies = [
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"build_const 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "embedded-hal"
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version = "0.2.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "generic-array"
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version = "0.12.3"
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@ -109,6 +118,7 @@ dependencies = [
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"cortex-m 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"cortex-m-rt 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"libm 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
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"smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=cd893e6)",
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"tm4c129x 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -134,6 +144,11 @@ name = "managed"
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version = "0.5.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "nb"
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version = "0.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "proc-macro2"
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version = "0.4.30"
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@ -257,6 +272,11 @@ name = "vcell"
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version = "0.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "void"
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version = "1.0.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "volatile-register"
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version = "0.2.0"
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@ -298,10 +318,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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"checksum cortex-m-rt 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "17805910e3ecf029bdbfcc42b7384d9e3d9e5626153fa810002c1ef9839338ac"
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"checksum cortex-m-rt-macros 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "d7ae692573e0acccb1579fef1abf5a5bf1d2f3f0149a22b16870ec9309aee25f"
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"checksum crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d663548de7f5cca343f1e0a48d14dcfb0e9eb4e079ec58883b7251539fa10aeb"
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"checksum embedded-hal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ee4908a155094da7723c2d60d617b820061e3b4efcc3d9e293d206a5a76c170b"
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"checksum generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
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"checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
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"checksum libm 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7fc7aa29613bd6a620df431842069224d8bc9011086b1db4c0e0cd47fa03ec9a"
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"checksum managed 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "43e2737ecabe4ae36a68061398bf27d2bfd0763f4c3c837a398478459494c4b7"
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"checksum nb 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b1411551beb3c11dedfb0a90a0fa256b47d28b9ec2cdff34c25a2fa59e45dbdc"
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"checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
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"checksum quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
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"checksum r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2a38df5b15c8d5c7e8654189744d8e396bddc18ad48041a500ce52d6948941f"
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@ -319,6 +341,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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"checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
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"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
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"checksum vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "45c297f0afb6928cd08ab1ff9d95e99392595ea25ae1b5ecf822ff8764e57a0d"
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"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
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"checksum volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0d67cb4616d99b940db1d6bd28844ff97108b498a6ca850e5b6191a532063286"
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"checksum walkdir 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "bb08f9e670fab86099470b97cd2b252d6527f0b3cc1401acdb595ffc9dd288ff"
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"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
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@ -12,6 +12,7 @@ cortex-m = { version = "0.5", features = ["const-fn"] }
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cortex-m-rt = "0.6"
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crc = { version = "1.7", default-features = false }
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tm4c129x = { version = "0.8", features = ["rt"] }
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embedded-hal = { version = "0.2", features = ["unproven"] }
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[dependencies.smoltcp]
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git = "https://github.com/m-labs/smoltcp"
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@ -0,0 +1,73 @@
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use core::mem::transmute;
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use core::slice::from_raw_parts_mut;
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use embedded_hal::digital::v2::{InputPin, OutputPin};
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pub trait Gpio where Self: Sized {
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fn into_output(self) -> GpioOutput<Self>;
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fn into_input(self) -> GpioInput<Self>;
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}
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pub struct GpioInput<PIN>(PIN);
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pub struct GpioOutput<PIN>(PIN);
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macro_rules! def_gpio {
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($PORT: tt, $PIN: tt, $idx: expr) => (
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impl Gpio for $PIN {
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fn into_output(self) -> GpioOutput<Self> {
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let gpio = unsafe { &*tm4c129x::$PORT::ptr() };
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gpio.dir.modify(|_, w| w.dir().bits(1 << $idx));
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gpio.den.modify(|_, w| w.den().bits(1 << $idx));
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GpioOutput(self)
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}
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fn into_input(self) -> GpioInput<Self> {
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let gpio = unsafe { &*tm4c129x::$PORT::ptr() };
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gpio.dir.modify(|_, w| w.dir().bits(1 << $idx));
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gpio.den.modify(|_, w| w.den().bits(1 << $idx));
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GpioInput(self)
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}
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}
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impl InputPin for GpioInput<$PIN> {
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type Error = ();
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fn is_high(&self) -> Result<bool, Self::Error> {
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let gpio = unsafe { &*tm4c129x::$PORT::ptr() };
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Ok(gpio.data.read().data().bits() & (1 << $idx) == (1 << $idx))
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}
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fn is_low(&self) -> Result<bool, Self::Error> {
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let gpio = unsafe { &*tm4c129x::$PORT::ptr() };
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Ok(gpio.data.read().data().bits() & (1 << $idx) != (1 << $idx))
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}
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}
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impl OutputPin for GpioOutput<$PIN> {
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type Error = ();
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fn set_low(&mut self) -> Result<(), Self::Error> {
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let gpio = unsafe { &*tm4c129x::$PORT::ptr() };
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let data = masked_data(unsafe { transmute(&gpio.data) }, $idx);
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*data = 0;
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Ok(())
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}
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fn set_high(&mut self) -> Result<(), Self::Error> {
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let gpio = unsafe { &*tm4c129x::$PORT::ptr() };
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let data = masked_data(unsafe { transmute(&gpio.data) }, $idx);
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*data = 1 << $idx;
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Ok(())
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}
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}
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)
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}
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pub struct PB4;
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def_gpio!(GPIO_PORTB_AHB, PB4, 4);
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pub struct PB5;
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def_gpio!(GPIO_PORTB_AHB, PB5, 5);
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pub struct PE4;
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def_gpio!(GPIO_PORTE_AHB, PE4, 5);
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pub struct PE5;
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def_gpio!(GPIO_PORTE_AHB, PE5, 5);
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/// Setting of GPIO pins is optimized by address masking
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fn masked_data<'a>(data: *mut u32, bits: u8) -> &'a mut u32 {
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let data = unsafe { from_raw_parts_mut(data, 0x100) };
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&mut data[usize::from(bits)]
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}
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@ -1,6 +1,8 @@
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use cortex_m;
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use tm4c129x;
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mod gpio;
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const LED1: u8 = 0x10; // PK4
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const LED2: u8 = 0x40; // PK6
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@ -10,6 +10,7 @@ extern crate cortex_m_rt;
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extern crate tm4c129x;
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extern crate smoltcp;
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extern crate crc;
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extern crate embedded_hal;
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use core::cell::{Cell, RefCell};
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use core::fmt;
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Loading…
Reference in New Issue