forked from M-Labs/artiq-zynq
101 lines
2.6 KiB
Rust
101 lines
2.6 KiB
Rust
#[cfg(feature = "target_zc706")]
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mod i2c {
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use libboard_zynq;
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use crate::artiq_raise;
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static mut I2C_BUS: Option<libboard_zynq::i2c::I2c> = None;
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pub extern fn start(busno: i32) {
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if busno > 0 {
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artiq_raise!("I2CError", "I2C bus could not be accessed");
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}
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unsafe {
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if (&mut I2C_BUS).as_mut().unwrap().start().is_err() {
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artiq_raise!("I2CError", "I2C start failed");
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}
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}
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}
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pub extern fn restart(busno: i32) {
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if busno > 0 {
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artiq_raise!("I2CError", "I2C bus could not be accessed");
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}
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unsafe {
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if (&mut I2C_BUS).as_mut().unwrap().restart().is_err() {
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artiq_raise!("I2CError", "I2C restart failed");
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}
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}
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}
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pub extern fn stop(busno: i32) {
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if busno > 0 {
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artiq_raise!("I2CError", "I2C bus could not be accessed");
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}
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unsafe {
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if (&mut I2C_BUS).as_mut().unwrap().stop().is_err() {
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artiq_raise!("I2CError", "I2C stop failed");
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}
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}
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}
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pub extern fn write(busno: i32, data: i32) -> bool {
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if busno > 0 {
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artiq_raise!("I2CError", "I2C bus could not be accessed");
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}
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unsafe {
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match (&mut I2C_BUS).as_mut().unwrap().write(data as u8) {
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Ok(r) => r,
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Err(_) => artiq_raise!("I2CError", "I2C write failed"),
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}
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}
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}
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pub extern fn read(busno: i32, ack: bool) -> i32 {
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if busno > 0 {
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artiq_raise!("I2CError", "I2C bus could not be accessed");
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}
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unsafe {
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match (&mut I2C_BUS).as_mut().unwrap().read(ack) {
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Ok(r) => r as i32,
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Err(_) => artiq_raise!("I2CError", "I2C read failed"),
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}
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}
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}
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pub fn init() {
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let mut i2c = libboard_zynq::i2c::I2c::i2c0();
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i2c.init().expect("I2C bus initialization failed");
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unsafe { I2C_BUS = Some(i2c) };
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}
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}
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#[cfg(not(feature = "target_zc706"))]
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mod i2c {
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use crate::artiq_raise;
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pub extern fn start(_busno: i32) {
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artiq_raise!("I2CError", "No I2C bus");
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}
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pub extern fn restart(_busno: i32) {
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artiq_raise!("I2CError", "No I2C bus");
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}
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pub extern fn stop(_busno: i32) {
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artiq_raise!("I2CError", "No I2C bus");
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}
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pub extern fn write(_busno: i32, _data: i32) -> bool {
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artiq_raise!("I2CError", "No I2C bus");
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}
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pub extern fn read(_busno: i32, _ack: bool) -> i32 {
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artiq_raise!("I2CError", "No I2C bus");
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}
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pub fn init() {
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}
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}
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pub use i2c::*;
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