M-Labs/zynq-rs
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Add i2c support

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This commit is contained in:
newell 2024-10-04 23:38:28 -07:00
parent 5ef3016554
commit cc20478d91
4 changed files with 27 additions and 16 deletions
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6
libboard_zynq/src/i2c/eeprom.rs
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@ -4,6 +4,7 @@ use embedded_hal::timer::CountDown;
pub struct EEPROM<'a> {
i2c: &'a mut I2c,
#[cfg(not(feature = "target_ebaz4205"))]
port: u8,
address: u8,
page_size: u8,
@ -46,6 +47,11 @@ impl<'a> EEPROM<'a> {
Ok(())
}
#[cfg(feature = "target_ebaz4205")]
fn select(&mut self) -> Result<(), &'static str> {
Ok(())
}
/// Random read
pub fn read<'r>(&mut self, addr: u8, buf: &'r mut [u8]) -> Result<(), &'static str> {
self.select()?;

8
libboard_zynq/src/i2c/mod.rs
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@ -2,10 +2,13 @@
mod regs;
pub mod eeprom;
#[cfg(not(feature = "target_ebaz4205"))]
use super::slcr;
use super::time::Microseconds;
use embedded_hal::timer::CountDown;
use libregister::{RegisterR, RegisterRW, RegisterW};
use libregister::{RegisterR, RegisterRW};
#[cfg(not(feature = "target_ebaz4205"))]
use libregister::RegisterW;
#[cfg(feature = "target_kasli_soc")]
use log::info;
@ -22,9 +25,10 @@ pub struct I2c {
}
impl I2c {
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
pub fn i2c0() -> Self {
// Route I2C 0 SCL / SDA Signals to MIO Pins 50 / 51
#[cfg(not(feature = "target_ebaz4205"))]
slcr::RegisterBlock::unlocked(|slcr| {
// SCL
slcr.mio_pin_50.write(

27
libboard_zynq/src/i2c/regs.rs
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@ -21,6 +21,7 @@ use libregister::{
// Current compatibility:
// zc706: GPIO 50, 51 == SCL, SDA
// kasli_soc: GPIO 50, 51 == SCL, SDA; GPIO 33 == I2C_SW_RESET
// ebaz4205: GPIO (EMIO)
pub struct RegisterBlock {
pub gpio_output_mask: &'static mut GPIOOutputMask,
@ -48,17 +49,17 @@ register!(gpio_output_mask,
/// MASK_DATA_1_MSW:
/// Maskable output data for MIO[53:48]
GPIOOutputMask, RW, u32);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_at!(GPIOOutputMask, 0xE000A00C, new);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bit!(gpio_output_mask,
/// Output for SCL
scl_o, 2);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bit!(gpio_output_mask,
/// Output for SDA
sda_o, 3);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bits!(gpio_output_mask,
/// Mask for keeping bits except SCL and SDA unchanged
mask, u16, 16, 31);
@ -82,13 +83,13 @@ register!(gpio_input,
/// DATA_1_RO:
/// Input data for MIO[53:32]
GPIOInput, RO, u32);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_at!(GPIOInput, 0xE000A064, new);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bit!(gpio_input,
/// Input for SCL
scl, 18);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bit!(gpio_input,
/// Input for SDA
sda, 19);
@ -98,13 +99,13 @@ register!(gpio_direction,
/// DIRM_1:
/// Direction mode for MIO[53:32]; 0/1 = in/out
GPIODirection, RW, u32);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_at!(GPIODirection, 0xE000A244, new);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bit!(gpio_direction,
/// Direction for SCL
scl, 18);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bit!(gpio_direction,
/// Direction for SDA
sda, 19);
@ -117,13 +118,13 @@ register!(gpio_output_enable,
/// OEN_1:
/// Output enable for MIO[53:32]
GPIOOutputEnable, RW, u32);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_at!(GPIOOutputEnable, 0xE000A248, new);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bit!(gpio_output_enable,
/// Output enable for SCL
scl, 18);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
register_bit!(gpio_output_enable,
/// Output enable for SDA
sda, 19);

2
libboard_zynq/src/lib.rs
View File

@ -19,7 +19,7 @@ pub mod gic;
pub mod time;
pub mod timer;
pub mod sdio;
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc", feature = "target_ebaz4205"))]
pub mod i2c;
pub mod logger;
pub mod ps7_init;