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impl SetConfig for rp2040 SPI

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This commit is contained in:
Henrik Alsér 2022-07-09 00:32:55 +02:00
parent d637510b44
commit 85e67d94ad
2 changed files with 19 additions and 0 deletions
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1
embassy-rp/Cargo.toml
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@ -30,6 +30,7 @@ unstable-traits = ["embedded-hal-1"]
embassy = { version = "0.1.0", path = "../embassy", features = [ "time-tick-1mhz", "nightly"] }
embassy-cortex-m = { version = "0.1.0", path = "../embassy-cortex-m", features = ["prio-bits-3"]}
embassy-hal-common = {version = "0.1.0", path = "../embassy-hal-common" }
embassy-embedded-hal = {version = "0.1.0", path = "../embassy-embedded-hal" }
embassy-macros = { version = "0.1.0", path = "../embassy-macros", features = ["rp"]}
atomic-polyfill = "0.1.5"
defmt = { version = "0.3", optional = true }

18
embassy-rp/src/spi.rs
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@ -1,5 +1,6 @@
use core::marker::PhantomData;
use embassy_embedded_hal::SetConfig;
use embassy_hal_common::unborrow;
pub use embedded_hal_02::spi::{Phase, Polarity};
@ -350,3 +351,20 @@ mod eh1 {
}
}
}
impl<'d, T: Instance> SetConfig for Spi<'d, T> {
type Config = Config;
fn set_config(&mut self, config: &Self::Config) {
let p = self.inner.regs();
let (presc, postdiv) = calc_prescs(config.frequency);
unsafe {
p.cpsr().write(|w| w.set_cpsdvsr(presc));
p.cr0().write(|w| {
w.set_dss(0b0111); // 8bit
w.set_spo(config.polarity == Polarity::IdleHigh);
w.set_sph(config.phase == Phase::CaptureOnSecondTransition);
w.set_scr(postdiv);
});
}
}
}