forked from M-Labs/artiq-zynq
expose i2c to kernels
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@ -22,6 +22,13 @@ device_db = {
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"module": "artiq.coredevice.dma",
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"class": "CoreDMA"
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},
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"i2c_switch": {
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"type": "local",
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"module": "artiq.coredevice.i2c",
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"class": "PCA9548"
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},
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# led? are common to all variants
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"led0": {
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"type": "local",
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@ -0,0 +1,39 @@
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use libboard_zynq;
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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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unsafe {
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(&mut I2C_BUS).as_mut().unwrap().start().expect("I2C start failed")
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}
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}
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pub extern fn restart(_busno: i32) {
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unsafe {
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(&mut I2C_BUS).as_mut().unwrap().restart().expect("I2C restart failed")
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}
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}
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pub extern fn stop(_busno: i32) {
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unsafe {
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(&mut I2C_BUS).as_mut().unwrap().stop().expect("I2C stop failed")
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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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unsafe {
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(&mut I2C_BUS).as_mut().unwrap().write(data as u8).expect("I2C write failed")
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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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unsafe {
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(&mut I2C_BUS).as_mut().unwrap().read(ack).expect("I2C read failed") as i32
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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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@ -9,6 +9,7 @@ use alloc::vec;
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use crate::eh_artiq;
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use crate::rtio;
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use crate::i2c;
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use super::rpc::{rpc_send, rpc_send_async, rpc_recv};
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use super::dma;
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use super::cache;
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@ -100,6 +101,13 @@ pub fn resolve(required: &[u8]) -> Option<u32> {
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api!(cache_get = cache::get),
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api!(cache_put = cache::put),
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// i2c
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api!(i2c_start = i2c::start),
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api!(i2c_restart = i2c::restart),
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api!(i2c_stop = i2c::stop),
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api!(i2c_write = i2c::write),
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api!(i2c_read = i2c::read),
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// Double-precision floating-point arithmetic helper functions
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// RTABI chapter 4.1.2, Table 2
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api!(__aeabi_dadd),
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@ -43,6 +43,7 @@ mod logger;
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mod mgmt;
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mod analyzer;
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mod irq;
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mod i2c;
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fn init_gateware() {
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// Set up PS->PL clocks
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@ -177,6 +178,9 @@ pub fn main_core0() {
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init_gateware();
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info!("detected gateware: {}", identifier_read(&mut [0; 64]));
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i2c::init();
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let cfg = match Config::new() {
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Ok(cfg) => cfg,
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Err(err) => {
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