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i2c: add stubs for targets without i2c

This commit is contained in:
Astro 2020-11-11 14:17:46 +01:00
parent 7c336f7770
commit 9259cffeb2
1 changed files with 80 additions and 47 deletions
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127
src/runtime/src/i2c.rs
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@ -1,68 +1,101 @@
use libboard_zynq; use libboard_zynq;
use crate::artiq_raise; #[cfg(feature = "target_zc706")]
mod i2c {
use crate::artiq_raise;
static mut I2C_BUS: Option<libboard_zynq::i2c::I2c> = None; static mut I2C_BUS: Option<libboard_zynq::i2c::I2c> = None;
pub extern fn start(busno: i32) { pub extern fn start(busno: i32) {
if busno > 0 { if busno > 0 {
artiq_raise!("I2CError", "I2C bus could not be accessed"); artiq_raise!("I2CError", "I2C bus could not be accessed");
} }
unsafe { unsafe {
if (&mut I2C_BUS).as_mut().unwrap().start().is_err() { if (&mut I2C_BUS).as_mut().unwrap().start().is_err() {
artiq_raise!("I2CError", "I2C start failed"); artiq_raise!("I2CError", "I2C start failed");
}
} }
} }
}
pub extern fn restart(busno: i32) { pub extern fn restart(busno: i32) {
if busno > 0 { if busno > 0 {
artiq_raise!("I2CError", "I2C bus could not be accessed"); artiq_raise!("I2CError", "I2C bus could not be accessed");
} }
unsafe { unsafe {
if (&mut I2C_BUS).as_mut().unwrap().restart().is_err() { if (&mut I2C_BUS).as_mut().unwrap().restart().is_err() {
artiq_raise!("I2CError", "I2C restart failed"); artiq_raise!("I2CError", "I2C restart failed");
}
} }
} }
}
pub extern fn stop(busno: i32) { pub extern fn stop(busno: i32) {
if busno > 0 { if busno > 0 {
artiq_raise!("I2CError", "I2C bus could not be accessed"); artiq_raise!("I2CError", "I2C bus could not be accessed");
} }
unsafe { unsafe {
if (&mut I2C_BUS).as_mut().unwrap().stop().is_err() { if (&mut I2C_BUS).as_mut().unwrap().stop().is_err() {
artiq_raise!("I2CError", "I2C stop failed"); artiq_raise!("I2CError", "I2C stop failed");
}
} }
} }
}
pub extern fn write(busno: i32, data: i32) -> bool { pub extern fn write(busno: i32, data: i32) -> bool {
if busno > 0 { if busno > 0 {
artiq_raise!("I2CError", "I2C bus could not be accessed"); artiq_raise!("I2CError", "I2C bus could not be accessed");
} }
unsafe { unsafe {
match (&mut I2C_BUS).as_mut().unwrap().write(data as u8) { match (&mut I2C_BUS).as_mut().unwrap().write(data as u8) {
Ok(r) => r, Ok(r) => r,
Err(_) => artiq_raise!("I2CError", "I2C write failed"), Err(_) => artiq_raise!("I2CError", "I2C write failed"),
}
} }
} }
}
pub extern fn read(busno: i32, ack: bool) -> i32 { pub extern fn read(busno: i32, ack: bool) -> i32 {
if busno > 0 { if busno > 0 {
artiq_raise!("I2CError", "I2C bus could not be accessed"); artiq_raise!("I2CError", "I2C bus could not be accessed");
} }
unsafe { unsafe {
match (&mut I2C_BUS).as_mut().unwrap().read(ack) { match (&mut I2C_BUS).as_mut().unwrap().read(ack) {
Ok(r) => r as i32, Ok(r) => r as i32,
Err(_) => artiq_raise!("I2CError", "I2C read failed"), Err(_) => artiq_raise!("I2CError", "I2C read failed"),
}
} }
} }
pub fn init() {
let mut i2c = libboard_zynq::i2c::I2c::i2c0();
i2c.init().expect("I2C bus initialization failed");
unsafe { I2C_BUS = Some(i2c) };
}
} }
pub fn init() { #[cfg(not(feature = "target_zc706"))]
let mut i2c = libboard_zynq::i2c::I2c::i2c0(); mod i2c {
i2c.init().expect("I2C bus initialization failed"); use crate::artiq_raise;
unsafe { I2C_BUS = Some(i2c) };
pub extern fn start(_busno: i32) {
artiq_raise!("I2CError", "No I2C bus");
}
pub extern fn restart(_busno: i32) {
artiq_raise!("I2CError", "No I2C bus");
}
pub extern fn stop(_busno: i32) {
artiq_raise!("I2CError", "No I2C bus");
}
pub extern fn write(_busno: i32, _data: i32) -> bool {
artiq_raise!("I2CError", "No I2C bus");
}
pub extern fn read(_busno: i32, _ack: bool) -> i32 {
artiq_raise!("I2CError", "No I2C bus");
}
pub fn init() {
}
} }
pub use i2c::*;