secure-ec-poc: QEMU

dt-rust.yaml

@@ -163,7 +163,8 @@
   rules:
     - !Compatible
       names:
-        - "nxp,lpc-usart"
+        - "nxp,lpc-usart" # u_Note: Should probably pull in more eventually but this is what i have
+        - "zephyr,uart-emul"
         - "zephyr,native-pty-uart"
       level: 0
   actions:

qemu.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+# Builds and runs the QEMU build.
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+BUILD_DIR="${BUILD_DIR:-$(west topdir)/build-qemu}"
+
+if command -v rustup >/dev/null 2>&1; then
+    rustup target add thumbv7m-none-eabi
+fi
+
+# Build for QEMU (pass -p always via WEST_BUILD_ARGS for a pristine build).
+west build -b qemu_cortex_m3 "$SCRIPT_DIR/samples/zephyr-odp" -d "$BUILD_DIR" ${WEST_BUILD_ARGS}
+
+# Launch the image in QEMU.
+west build -t run -d "$BUILD_DIR"

samples/zephyr-odp/CMakeLists.txt

@@ -12,4 +12,4 @@ rust_cargo_application()
 
 # Compile the C mock drivers
 target_sources(app PRIVATE drivers/fuel_gauge_emul.c)
-target_sources(app PRIVATE drivers/pwm_emul.c)
+target_sources(app PRIVATE drivers/pwm_emul.c)

samples/zephyr-odp/boards/qemu_cortex_m3.conf

@@ -0,0 +1,21 @@
+# qemu_cortex_m3 configuration for the zephyr-odp sample.
+
+# Use QEMU UART instead of RTT
+CONFIG_LOG_BACKEND_RTT=n
+CONFIG_USE_SEGGER_RTT=n
+CONFIG_RTT_CONSOLE=n
+CONFIG_LOG_BACKEND_UART=y
+CONFIG_UART_CONSOLE=y
+CONFIG_STDOUT_CONSOLE=y
+
+# No DMA
+CONFIG_DMA=n
+CONFIG_DMA_MCUX_LPC=n # Disable NXP MCUX-specific stuff since QEMU
+
+# The emulators
+CONFIG_EMUL=y
+CONFIG_I2C_EMUL=y
+CONFIG_GPIO_EMUL=y
+CONFIG_UART_EMUL=y
+CONFIG_F75303=y
+CONFIG_EMUL_F75303=y

samples/zephyr-odp/boards/qemu_cortex_m3.overlay

@@ -0,0 +1,77 @@
+#include <zephyr/dt-bindings/gpio/gpio.h>
+#include <zephyr/dt-bindings/i2c/i2c.h>
+
+/ {
+	/* Emulated I2C bus hosting the temperature sensor and fuel gauge. */
+	fake_i2c_bus: i2c@100 {
+		status = "okay";
+		compatible = "zephyr,i2c-emul-controller";
+		clock-frequency = <I2C_BITRATE_STANDARD>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x100 4>;
+
+		temperature_sensor_0: f75303@4c {
+			compatible = "fintek,f75303";
+			reg = <0x4c>;
+		};
+
+		fuel_gauge: sbs-gauge@b {
+			compatible = "sbs,sbs-gauge-new-api";
+			reg = <0x0b>;
+			status = "okay";
+		};
+	};
+
+	/* Emulated GPIO controller used for the tachometer input pin. */
+	gpio_emul0: gpio-emul {
+		status = "okay";
+		compatible = "zephyr,gpio-emul";
+		rising-edge;
+		falling-edge;
+		high-level;
+		low-level;
+		gpio-controller;
+		#gpio-cells = <2>;
+		ngpios = <32>;
+	};
+	tachometer: tachometer {
+		compatible = "zephyr,tach-gpio";
+		gpios = <&gpio_emul0 15 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>;
+		pulses-per-round = <2>;
+	};
+
+	/* Emulated PWM driver used by PWM Fan */
+	pwm_emul0: pwm-emul {
+		status = "okay";
+		compatible = "zephyr,pwm-emul";
+		#pwm-cells = <3>;
+		frequency = <1000000>;
+	};
+	fan0: my-fan {
+		compatible = "pwm-fan";
+		pwms = <&pwm_emul0 7 40000 0>;
+		max-rpm = <5000>;
+		min-rpm = <0>;
+		min-start-rpm = <3000>;
+	};
+
+	/* Emulated RTC */
+	rtc_emul: rtc_emul {
+		compatible = "zephyr,rtc-emul";
+		status = "okay";
+	};
+	rs_rtc0: rs-rtc {
+		compatible = "rs,rtc";
+		rtc = <&rtc_emul>;
+		resolution-hz = <1>;
+	};
+
+    /* Emulated UART */
+	flexcomm0: uart-emul0 {
+		status = "okay";
+		compatible = "zephyr,uart-emul";
+		current-speed = <115200>;
+		loopback;
+	};
+};

samples/zephyr-odp/sample.yaml

@@ -6,8 +6,9 @@ common:
   tags: rust
   filter: CONFIG_RUST_SUPPORTED
   platform_allow:
-    - nrf52840dk/nrf52840'
+    - 'nrf52840dk/nrf52840'
     - 'mimxrt685_evk/mimxrt685s/cm33'
+    - 'qemu_cortex_m3'
     - 'native_sim/native/64'
 tests:
   sample.rust.helloworld: