experiments/src/main.rs

@@ -183,6 +183,20 @@ pub fn main_core0() {
         println!("");
     }
 
+    #[cfg(feature = "target_kasli_soc")]
+    {
+        let mut err_cdwn = timer.countdown();
+        let mut err_state = true;
+        let mut led = zynq::error_led::ErrorLED::error_led();
+        task::spawn( async move { 
+            loop {
+                led.toggle(err_state);
+                err_state = !err_state;
+                delay(&mut err_cdwn, Milliseconds(1000)).await;
+            }
+        });
+    }
+
     let eth = zynq::eth::Eth::eth0(HWADDR.clone());
     println!("Eth on");
 

libboard_zynq/src/error_led.rs

@@ -0,0 +1,116 @@
+use libregister::{RegisterRW, RegisterW};
+use libregister::{register, register_at, register_bit, register_bits};
+use super::slcr;
+
+pub struct ErrorLED {
+    regs: RegisterBlock,
+}
+
+impl ErrorLED {
+    #[cfg(feature = "target_kasli_soc")]
+    pub fn error_led() -> Self {
+        slcr::RegisterBlock::unlocked(|slcr| {
+            // Error LED at MIO pin 37
+            slcr.mio_pin_37.write(
+                slcr::MioPin37::zeroed()
+                    .l3_sel(0b000)
+                    .io_type(slcr::IoBufferType::Lvcmos25)
+                    .pullup(true)
+                    .disable_rcvr(true)
+            );
+            // reset
+            slcr.gpio_rst_ctrl.reset_gpio();
+        });
+
+        Self::error_led_common(0xFFFF - 0x0080)
+    }
+
+    fn error_led_common(gpio_output_mask: u16) -> Self {
+        // Setup register block
+        let self_ = Self {
+            regs: RegisterBlock::error_led(),
+        };
+
+        // Setup GPIO output mask
+        self_.regs.gpio_output_mask.modify(|_, w| {
+            w.mask(gpio_output_mask)
+        });
+
+        self_.regs.gpio_direction.modify(|_, w| {
+            w.lederr(true)
+        });
+
+        self_
+    }
+
+    fn led_oe(&mut self, oe: bool) {
+        self.regs.gpio_output_enable.modify(|_, w| {
+             w.lederr(oe)
+        })
+    }
+
+    fn led_o(&mut self, o: bool) {
+        self.regs.gpio_output_mask.modify(|_, w| {
+             w.lederr_o(o)
+        })
+    }
+
+    pub fn toggle(&mut self, state: bool) {
+        self.led_o(state);
+        self.led_oe(state);
+    }
+}
+
+
+pub struct RegisterBlock {
+    pub gpio_output_mask: &'static mut GPIOOutputMask,
+    pub gpio_direction: &'static mut GPIODirection,
+    pub gpio_output_enable: &'static mut GPIOOutputEnable,
+}
+
+impl RegisterBlock {
+    pub fn error_led() -> Self {
+        Self {
+            gpio_output_mask: GPIOOutputMask::new(),
+            gpio_direction: GPIODirection::new(),
+            gpio_output_enable: GPIOOutputEnable::new()
+        }
+    }
+}
+
+register!(gpio_output_mask,
+            /// MASK_DATA_1_LSW:
+            /// Maskable output data for MIO[47:32]
+            GPIOOutputMask, RW, u32);
+#[cfg(feature = "target_kasli_soc")]
+register_at!(GPIOOutputMask, 0xE000A008, new);
+#[cfg(feature = "target_kasli_soc")]
+register_bit!(gpio_output_mask,
+              /// Output for LED_ERR (MIO[37])
+              lederr_o, 5);
+#[cfg(feature = "target_kasli_soc")]
+register_bits!(gpio_output_mask,
+               mask, u16, 16, 31);
+
+register!(gpio_direction,
+          /// DIRM_1:
+          /// Direction mode for MIO[53:32]; 0/1 = in/out
+          GPIODirection, RW, u32);
+#[cfg(feature = "target_kasli_soc")]
+register_at!(GPIODirection, 0xE000A244, new);
+#[cfg(feature = "target_kasli_soc")]
+register_bit!(gpio_direction,
+              /// Direction for LED_ERR
+              lederr, 5);
+
+register!(gpio_output_enable,
+          /// OEN_1:
+          /// Output enable for MIO[53:32]
+          GPIOOutputEnable, RW, u32);
+#[cfg(feature = "target_kasli_soc")]
+register_at!(GPIOOutputEnable, 0xE000A248, new);
+#[cfg(feature = "target_kasli_soc")]
+register_bit!(gpio_output_enable,
+              /// Output enable for LED_ERR
+              lederr, 5);
+              

libboard_zynq/src/lib.rs

@@ -23,3 +23,5 @@ pub mod sdio;
 pub mod i2c;
 pub mod logger;
 pub mod ps7_init;
+#[cfg(feature="target_kasli_soc")]
+pub mod error_led;

libsupport_zynq/src/panic.rs

@@ -1,4 +1,6 @@
 use libboard_zynq::{print, println};
+#[cfg(feature = "target_kasli_soc")]
+use libboard_zynq::error_led::ErrorLED;
 
 #[panic_handler]
 fn panic(info: &core::panic::PanicInfo) -> ! {
@@ -13,6 +15,10 @@ fn panic(info: &core::panic::PanicInfo) -> ! {
     } else {
         println!("");
     }
-
+    #[cfg(feature = "target_kasli_soc")]
+    {
+        let mut err_led = ErrorLED::error_led();
+        err_led.toggle(true);
+    }
     loop {}
 }