Add Butterfly P3 Receiver

.github/workflows/workflow.yml

@@ -30,6 +30,7 @@ jobs:
                   {boardname: "nrf52840dk/nrf52840", fileformat: "hex", filename: "SlimeNRF_nRF52840dk_Receiver"}, 
                   {boardname: "butterfly_p1_uf2/nrf52833", fileformat: "uf2", filename: "SlimeNRF_Butterfly_P1_Receiver"}, 
                   {boardname: "butterfly_p2_uf2/nrf52833", fileformat: "uf2", filename: "SlimeNRF_Butterfly_P2_Receiver"}, 
+                  {boardname: "butterfly_p3/nrf52820", fileformat: "hex", filename: "SlimeNRF_Butterfly_P3_Receiver"},
                 ]
     if: always()
     runs-on: ubuntu-latest

boards/slimevr/butterfly_p3/CMakeLists.txt

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+zephyr_library_sources(board.c)

boards/slimevr/butterfly_p3/Kconfig.butterfly_p3

@@ -0,0 +1,5 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_BUTTERFLY_P3
+	select SOC_NRF52820_QDAA

boards/slimevr/butterfly_p3/board.c

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2018 Nordic Semiconductor ASA.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/init.h>
+#include <hal/nrf_power.h>
+
+static int board_butterfly_p3_init(void)
+{
+
+	/* needed for fem and debugging
+	 */
+	if ((nrf_power_mainregstatus_get(NRF_POWER) ==
+	     NRF_POWER_MAINREGSTATUS_HIGH) &&
+	    ((NRF_UICR->REGOUT0 & UICR_REGOUT0_VOUT_Msk) ==
+	     (UICR_REGOUT0_VOUT_DEFAULT << UICR_REGOUT0_VOUT_Pos))) {
+
+		NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
+		while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {
+			;
+		}
+
+		NRF_UICR->REGOUT0 =
+		    (NRF_UICR->REGOUT0 & ~((uint32_t)UICR_REGOUT0_VOUT_Msk)) |
+		    (UICR_REGOUT0_VOUT_3V0 << UICR_REGOUT0_VOUT_Pos);
+
+		NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
+		while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {
+			;
+		}
+
+		/* a reset is required for changes to take effect */
+		NVIC_SystemReset();
+	}
+
+	return 0;
+}
+
+SYS_INIT(board_butterfly_p3_init, PRE_KERNEL_1,
+	 CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);

boards/slimevr/butterfly_p3/board.cmake

@@ -0,0 +1,9 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(jlink "--device=nrf52820_xxaa" "--speed=4000")
+board_runner_args(pyocd "--target=nrf52820" "--frequency=4000000")
+
+include(${ZEPHYR_BASE}/boards/common/nrfjprog.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)

boards/slimevr/butterfly_p3/board.yml

@@ -0,0 +1,8 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+board:
+  name: butterfly_p3
+  vendor: slimevr
+  socs:
+    - name: nrf52820

boards/slimevr/butterfly_p3/butterfly_p3.dts

@@ -0,0 +1,67 @@
+// Copyright (c) 2024 Nordic Semiconductor ASA
+// SPDX-License-Identifier: Apache-2.0
+
+/dts-v1/;
+#include <nordic/nrf52820_qdaa.dtsi>
+
+/ {
+	model = "butterfly_p3";
+	compatible = "butterfly_p3";
+
+	aliases {
+		sw0 = &button0;
+	};
+
+	buttons {
+		compatible = "gpio-keys";
+		button0: button_0 {
+			gpios = <&gpio0 15 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
+			label = "Push button switch 0";
+		};
+	};
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,console = &cdc_acm_uart0;
+		zephyr,shell-uart = &cdc_acm_uart0;
+	};
+
+	nrf_radio_fem: skyFem { // ripped straight from holyiot dts, but it works
+        compatible = "skyworks,sky66112-11", "generic-fem-two-ctrl-pins";
+        ctx-gpios = <&gpio0 17 GPIO_ACTIVE_HIGH>;
+        ctx-settle-time-us = <1>;
+        crx-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
+        crx-settle-time-us = <1>;
+        tx-gain-db = <22>;
+		rx-gain-db = <12>;
+    };
+
+	zephyr,user {
+		led-gpios = <&gpio0 14 (GPIO_ACTIVE_LOW | GPIO_OPEN_DRAIN)>;
+	};
+};
+
+&reg0 {
+	status = "okay";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpiote {
+	status = "okay";
+};
+
+&radio {
+	fem = <&nrf_radio_fem>;
+};
+
+zephyr_udc0: &usbd {
+	compatible = "nordic,nrf-usbd";
+	status = "okay";
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+	};
+};

boards/slimevr/butterfly_p3/butterfly_p3.yaml

@@ -0,0 +1,14 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+identifier: butterfly_p3
+name: butterfly_p3
+vendor: slimevr
+type: mcu
+arch: arm
+ram: 32
+flash: 256
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools

boards/slimevr/butterfly_p3/butterfly_p3_defconfig

@@ -0,0 +1,12 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_ARM_MPU=y
+CONFIG_HW_STACK_PROTECTION=y
+
+CONFIG_USB_DEVICE_MANUFACTURER="SlimeVR"
+CONFIG_USB_DEVICE_PRODUCT="SlimeNRF Receiver Butterfly P3"
+
+#generate for adafruit uf2 bootloader flashing
+#CONFIG_BUILD_OUTPUT_UF2=y
+#CONFIG_FLASH_LOAD_OFFSET=0x1000