Add new support for Seeeduino Cortex-M0+

.github/workflows/qa-integration.yml

@@ -254,6 +254,7 @@ jobs:
             --platform rpi_pico \
             --platform seeed_xiao_samd21 \
             --platform seeeduino_xiao \
+            --platform seeeduino_cm0 \
             --platform seeeduino_lotus \
             --platform waveshare_rp2040_plus \
             --platform waveshare_rp2040_plus@16mb \

boards/arm/seeeduino_cm0/Kconfig.board

@@ -0,0 +1,8 @@
+# Seeeduino Cortex-M0+ board configuration
+
+# Copyright (c) 2023 TiaC Systems
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_SEEEDUINO_CM0
+	bool "Seeeduino Cortex-M0+"
+	depends on SOC_PART_NUMBER_SAMD21G18A

boards/arm/seeeduino_cm0/Kconfig.defconfig

@@ -0,0 +1,57 @@
+# Seeedunio Cortex-M0+ board configuration
+
+# Copyright (c) 2023 TiaC Systems
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD
+	default "seeeduino_cm0"
+	depends on BOARD_SEEEDUINO_CM0
+
+config USB_SELF_POWERED
+	default n
+	depends on USB_DEVICE_STACK && BOARD_SEEEDUINO_CM0
+
+config USB_MAX_POWER
+	default 250 if BOARD_SEEEDUINO_CM0	# 500mA
+	depends on USB_DEVICE_STACK && BOARD_SEEEDUINO_CM0
+
+# Workaround for not being able to have commas in macro arguments
+DT_CHOSEN_Z_CONSOLE := zephyr,console
+DT_COMPAT_Z_CDC_ACM_UART := zephyr,cdc-acm-uart
+DT_COMPAT_ATMEL_USB := atmel,sam0-usb
+
+# Macros to shorten Kconfig expressions
+DT_CHOSEN_CONSOLE_NODE := $(dt_chosen_path,$(DT_CHOSEN_Z_CONSOLE))
+DT_CHOSEN_CONSOLE_PARENT := $(dt_node_parent,$(DT_CHOSEN_CONSOLE_NODE))
+
+if BOARD_SEEEDUINO_CM0 && \
+   $(dt_chosen_enabled,$(DT_CHOSEN_Z_CONSOLE)) && \
+   $(dt_compat_on_bus,$(DT_COMPAT_Z_CDC_ACM_UART),usb) && \
+   $(dt_node_has_compat,$(DT_CHOSEN_CONSOLE_PARENT),$(DT_COMPAT_ATMEL_USB))
+
+config BOOTLOADER_BOSSA_DEVICE_NAME
+	default "$(dt_chosen_label,$(DT_CHOSEN_Z_CONSOLE))"
+	depends on USB_CDC_ACM
+
+# Logger cannot use itself to log
+choice USB_CDC_ACM_LOG_LEVEL_CHOICE
+	default USB_CDC_ACM_LOG_LEVEL_OFF
+	depends on LOG
+endchoice
+
+# Set USB log level to error only
+choice USB_DEVICE_LOG_LEVEL_CHOICE
+	default USB_DEVICE_LOG_LEVEL_ERR
+	depends on LOG
+endchoice
+
+# Wait 4000ms at startup for logging
+config LOG_PROCESS_THREAD_STARTUP_DELAY_MS
+	default 4000
+	depends on LOG
+
+# Wait 4000ms at startup for USB enumeration on host side
+config BOOT_DELAY
+	default 4000
+
+endif # zephyr,cdc-acm-uart

boards/arm/seeeduino_cm0/arduino_r3_connector.dtsi

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023 TiaC Systems
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	arduino_header: connector {
+		compatible = "arduino-header-r3";
+		#gpio-cells = <2>;
+		gpio-map-mask = <0xffffffff 0xffffffc0>;
+		gpio-map-pass-thru = <0 0x3f>;
+		gpio-map = <0 0 &porta 2 0>,	/* A0 */
+			   <1 0 &portb 8 0>,	/* A1 */
+			   <2 0 &portb 9 0>,	/* A2 */
+			   <3 0 &porta 4 0>,	/* A3 */
+			   <4 0 &porta 5 0>,	/* A4 */
+			   <5 0 &portb 2 0>,	/* A5 */
+			   <6 0 &porta 11 0>,	/* D0 */
+			   <7 0 &porta 10 0>,	/* D1 */
+			   <8 0 &porta 14 0>,	/* D2 */
+			   <9 0 &porta 9 0>,	/* D3 */
+			   <10 0 &porta 8 0>,	/* D4 */
+			   <11 0 &porta 15 0>,	/* D5 */
+			   <12 0 &porta 20 0>,	/* D6 */
+			   <13 0 &porta 21 0>,	/* D7 */
+			   <14 0 &porta 6 0>,	/* D8 */
+			   <15 0 &porta 7 0>,	/* D9 */
+			   <16 0 &porta 18 0>,	/* D10 */
+			   <17 0 &porta 16 0>,	/* D11 */
+			   <18 0 &porta 19 0>,	/* D12 */
+			   <19 0 &porta 17 0>,	/* D13 */
+			   <20 0 &porta 22 0>,	/* D14 */
+			   <21 0 &porta 23 0>;	/* D15 */
+	};
+};
+
+arduino_i2c: &sercom3 {};
+arduino_spi: &sercom1 {};
+arduino_serial: &sercom2 {};

boards/arm/seeeduino_cm0/board.cmake

@@ -0,0 +1,5 @@
+# Copyright (c) 2023 TiaC Systems
+# SPDX-License-Identifier: Apache-2.0
+
+include(${ZEPHYR_BASE}/boards/common/bossac.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/arm/seeeduino_cm0/doc/bootloader/samd21_sam_ba.jflash

@@ -0,0 +1,87 @@
+  AppVersion = 78406
+  FileVersion = 2
+[GENERAL]
+  aATEModuleSel[24] = 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+  ConnectMode = 0
+  CurrentFile = "samd21_sam_ba.hex"
+  DataFileSAddr = 0x00000000
+  GUIMode = 0
+  HostName = ""
+  TargetIF = 1
+  USBPort = 0
+  USBSerialNo = 0x00000000
+  UseATEModuleSelection = 0
+[JTAG]
+  IRLen = 0
+  MultipleTargets = 0
+  NumDevices = 0
+  Speed0 = 4000
+  Speed1 = 4000
+  TAP_Number = 0
+  UseAdaptive0 = 0
+  UseAdaptive1 = 0
+  UseMaxSpeed0 = 0
+  UseMaxSpeed1 = 0
+[CPU]
+  NumInitSteps = 1
+  InitStep0_Action = "Reset"
+  InitStep0_Value0 = 0x00000000
+  InitStep0_Value1 = 0x00000000
+  InitStep0_Comment = "Reset and halt target"
+  NumExitSteps = 0
+  UseScriptFile = 0
+  ScriptFile = ""
+  UseRAM = 1
+  RAMAddr = 0x20000000
+  RAMSize = 0x00008000
+  CheckCoreID = 1
+  CoreID = 0x0BC11477
+  CoreIDMask = 0x0F000FFF
+  UseAutoSpeed = 0x00000001
+  ClockSpeed = 0x00000000
+  EndianMode = 0
+  ChipName = "Microchip ATSAMD21G18A"
+[FLASH]
+  NumBanks = 2
+[FLASH0]
+  aRangeSel[1] = 0-1023
+  BankName = "Internal program flash"
+  BankSelMode = 1
+  BaseAddr = 0x00000000
+[FLASH1]
+  aRangeSel[1] = 0
+  BankName = "NVM User Row"
+  BankSelMode = 1
+  BaseAddr = 0x00804000
+[PRODUCTION]
+  AutoPerformsDisconnect = 0
+  AutoPerformsErase = 1
+  AutoPerformsProgram = 1
+  AutoPerformsSecure = 0
+  AutoPerformsStartApp = 0
+  AutoPerformsVerify = 1
+  EnableFixedVTref = 0
+  EnableTargetPower = 0
+  EraseType = 1
+  FixedVTref = 0x00000CE4
+  MonitorVTref = 0
+  MonitorVTrefMax = 0x0000157C
+  MonitorVTrefMin = 0x000003E8
+  OverrideTimeouts = 0
+  ProgramSN = 0
+  SerialFile = ""
+  SNAddr = 0x00000000
+  SNInc = 0x00000001
+  SNLen = 0x00000004
+  SNListFile = ""
+  SNValue = 0x00000001
+  StartAppType = 0
+  TargetPowerDelay = 0x00000014
+  TimeoutErase = 0x00003A98
+  TimeoutProgram = 0x00002710
+  TimeoutVerify = 0x00002710
+  VerifyType = 1
+[PERFORMANCE]
+  DisableSkipBlankDataOnProgram = 0x00000000
+  PerfromBlankCheckPriorEraseChip = 0x00000001
+  PerfromBlankCheckPriorEraseSelectedSectors = 0x00000001