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fix (rp i2c): set i2c slew rate to spec value

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The RP2040 datasheet indicates that I2C pins should have a limited
slew rate (Page 440 - 4.3.1.3.). This configures that for both
`I2c` and `I2cSlave`.

In addition, the pin configuration has been centralized to a single
fn.
This commit is contained in:
Jonathan Dickinson
2023-10-10 20:14:09 -04:00
parent 233aa1b53a
commit 3ec4e6320a
2 changed files with 23 additions and 36 deletions
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23
embassy-rp/src/i2c_slave.rs
View File

@ -5,7 +5,9 @@ use core::task::Poll;
use embassy_hal_internal::into_ref;
use pac::i2c;
use crate::i2c::{i2c_reserved_addr, AbortReason, Instance, InterruptHandler, SclPin, SdaPin, FIFO_SIZE};
use crate::i2c::{
i2c_reserved_addr, set_up_i2c_pin, AbortReason, Instance, InterruptHandler, SclPin, SdaPin, FIFO_SIZE,
};
use crate::interrupt::typelevel::{Binding, Interrupt};
use crate::{pac, Peripheral};
@ -100,23 +102,8 @@ impl<'d, T: Instance> I2cSlave<'d, T> {
p.ic_rx_tl().write(|w| w.set_rx_tl(0));
// Configure SCL & SDA pins
scl.gpio().ctrl().write(|w| w.set_funcsel(3));
sda.gpio().ctrl().write(|w| w.set_funcsel(3));
scl.pad_ctrl().write(|w| {
w.set_schmitt(true);
w.set_ie(true);
w.set_od(false);
w.set_pue(true);
w.set_pde(false);
});
sda.pad_ctrl().write(|w| {
w.set_schmitt(true);
w.set_ie(true);
w.set_od(false);
w.set_pue(true);
w.set_pde(false);
});
set_up_i2c_pin(&scl);
set_up_i2c_pin(&sda);
// Clear interrupts
p.ic_clr_intr().read();