libsupport_zynq: add logger implementation for the `log` crate

Cargo.lock

@@ -15,6 +15,11 @@ name = "byteorder"
 version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "compiler_builtins"
 version = "0.1.26"
@@ -29,12 +34,14 @@ dependencies = [
  "libcortex_a9 0.0.0",
  "libregister 0.0.0",
  "libsupport_zynq 0.0.0",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "libasync"
 version = "0.0.0"
 dependencies = [
+ "libboard_zynq 0.0.0",
  "libcortex_a9 0.0.0",
  "pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "smoltcp 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -77,6 +84,7 @@ dependencies = [
  "libcortex_a9 0.0.0",
  "libregister 0.0.0",
  "linked_list_allocator 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "r0 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -85,6 +93,14 @@ name = "linked_list_allocator"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "log"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "managed"
 version = "0.7.1"
@@ -127,8 +143,10 @@ dependencies = [
 "checksum bit_field 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a165d606cf084741d4ac3a28fb6e9b1eb0bd31f6cd999098cfddb0b2ab381dc0"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 "checksum byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
+"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 "checksum compiler_builtins 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)" = "036b035e9ebcd705affece16319223d19f229e2358be6e3b7b094e57193312e6"
 "checksum linked_list_allocator 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5825aea823c659d0fdcdbe8c9b78baf56f3a10365d783db874f6d360df72626f"
+"checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
 "checksum managed 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "fdcec5e97041c7f0f1c5b7d93f12e57293c831c646f4cc7a5db59460c7ea8de6"
 "checksum pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5894c618ce612a3fa23881b152b608bafb8c56cfc22f434a3ba3120b40f7b587"
 "checksum r0 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bd7a31eed1591dcbc95d92ad7161908e72f4677f8fabf2a32ca49b4237cbf211"

experiments/Cargo.toml

@@ -11,6 +11,7 @@ target_cora_z7_10 = ["libboard_zynq/target_cora_z7_10", "libsupport_zynq/target_
 default = ["target_zc706"]
 
 [dependencies]
+log = "0.4"
 libregister = { path = "../libregister" }
 libcortex_a9 = { path = "../libcortex_a9" }
 libboard_zynq = { path = "../libboard_zynq" }

experiments/src/main.rs

@@ -5,6 +5,7 @@ extern crate alloc;
 
 use core::{mem::transmute, task::Poll};
 use alloc::{borrow::ToOwned, collections::BTreeMap, format};
+use log::info;
 use libcortex_a9::{mutex::Mutex, sync_channel::{self, sync_channel}};
 use libboard_zynq::{
     print, println,
@@ -34,9 +35,13 @@ static mut STACK_CORE1: [u32; 512] = [0; 512];
 pub fn main_core0() {
     // zynq::clocks::CpuClocks::enable_io(1_250_000_000);
     println!("\nzc706 main");
+
+    libsupport_zynq::logger::init().unwrap();
+    log::set_max_level(log::LevelFilter::Trace);
+
     {
         use libregister::RegisterR;
-        println!("Boot mode: {:?}", zynq::slcr::RegisterBlock::new().boot_mode.read().boot_mode_pins());
+        info!("Boot mode: {:?}", zynq::slcr::RegisterBlock::new().boot_mode.read().boot_mode_pins());
     }
 
     #[cfg(feature = "target_zc706")]

libsupport_zynq/Cargo.toml

@@ -12,6 +12,7 @@ target_cora_z7_10 = ["libboard_zynq/target_cora_z7_10"]
 [dependencies]
 r0 = "1"
 compiler_builtins = "0.1"
+log = "0.4"
 linked_list_allocator = { version = "0.8", default-features = false }
 libregister = { path = "../libregister" }
 libcortex_a9 = { path = "../libcortex_a9" }

libsupport_zynq/src/lib.rs

@@ -10,4 +10,5 @@ pub extern crate compiler_builtins;
 pub mod boot;
 mod abort;
 mod panic;
+pub mod logger;
 pub mod ram;

libsupport_zynq/src/logger.rs

@@ -0,0 +1,27 @@
+//! A logger for the `log` crate
+
+use libboard_zynq::{println, stdio};
+
+pub static LOGGER: Logger = Logger;
+
+pub struct Logger;
+
+pub fn init() -> Result<(), log::SetLoggerError> {
+    log::set_logger(&LOGGER)
+}
+
+impl log::Log for Logger {
+    fn enabled(&self, metadata: &log::Metadata) -> bool {
+        metadata.level() <= log::Level::Trace
+    }
+
+    fn log(&self, record: &log::Record) {
+        if true || self.enabled(record.metadata()) {
+            println!("{} - {}", record.level(), record.args());
+        }
+    }
+    fn flush(&self) {
+        let uart = stdio::get_uart();
+        while !uart.tx_fifo_empty() {}
+    }
+}