diff --git a/.github/workflows/build_arm.yml b/.github/workflows/build_arm.yml
index 377fc44d90..70385bc1b2 100644
--- a/.github/workflows/build_arm.yml
+++ b/.github/workflows/build_arm.yml
@@ -39,9 +39,7 @@ jobs:
- 'lpc51 lpc54'
- 'mm32 msp432e4'
- 'nrf'
- - 'samd11 samd21'
- - 'same5x'
- - 'saml2x'
+ - 'samd11 same5x saml2x'
- 'stm32f2 stm32f3'
- 'stm32l0 stm32u5 stm32wb'
- 'tm4c123 xmc4000'
diff --git a/.github/workflows/cmake_arm.yml b/.github/workflows/cmake_arm.yml
index 6f7d024bdb..e3a00f9c52 100644
--- a/.github/workflows/cmake_arm.yml
+++ b/.github/workflows/cmake_arm.yml
@@ -40,6 +40,7 @@ jobs:
- 'mcx'
- 'ra'
- 'rp2040'
+ - 'samd21'
- 'samd51'
- 'stm32f0'
- 'stm32f1'
diff --git a/.idea/cmake.xml b/.idea/cmake.xml
index a060f18eb7..15dd85f93b 100644
--- a/.idea/cmake.xml
+++ b/.idea/cmake.xml
@@ -52,7 +52,8 @@
-
+
+
\ No newline at end of file
diff --git a/hw/bsp/samd21/FreeRTOSConfig/FreeRTOSConfig.h b/hw/bsp/samd21/FreeRTOSConfig/FreeRTOSConfig.h
new file mode 100644
index 0000000000..02e8687419
--- /dev/null
+++ b/hw/bsp/samd21/FreeRTOSConfig/FreeRTOSConfig.h
@@ -0,0 +1,165 @@
+/*
+ * FreeRTOS Kernel V10.0.0
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software. If you wish to use our Amazon
+ * FreeRTOS name, please do so in a fair use way that does not cause confusion.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+
+// skip if included from IAR assembler
+#ifndef __IASMARM__
+ #include "sam.h"
+#endif
+
+/* Cortex M23/M33 port configuration. */
+#define configENABLE_MPU 0
+#define configENABLE_FPU 1
+#define configENABLE_TRUSTZONE 0
+#define configMINIMAL_SECURE_STACK_SIZE (1024)
+
+#define configUSE_PREEMPTION 1
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION 0
+#define configCPU_CLOCK_HZ SystemCoreClock
+#define configTICK_RATE_HZ ( 1000 )
+#define configMAX_PRIORITIES ( 5 )
+#define configMINIMAL_STACK_SIZE ( 128 )
+#define configTOTAL_HEAP_SIZE ( configSUPPORT_DYNAMIC_ALLOCATION*4*1024 )
+#define configMAX_TASK_NAME_LEN 16
+#define configUSE_16_BIT_TICKS 0
+#define configIDLE_SHOULD_YIELD 1
+#define configUSE_MUTEXES 1
+#define configUSE_RECURSIVE_MUTEXES 1
+#define configUSE_COUNTING_SEMAPHORES 1
+#define configQUEUE_REGISTRY_SIZE 4
+#define configUSE_QUEUE_SETS 0
+#define configUSE_TIME_SLICING 0
+#define configUSE_NEWLIB_REENTRANT 0
+#define configENABLE_BACKWARD_COMPATIBILITY 1
+#define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP 0
+
+#define configSUPPORT_STATIC_ALLOCATION 0
+#define configSUPPORT_DYNAMIC_ALLOCATION 1
+
+/* Hook function related definitions. */
+#define configUSE_IDLE_HOOK 0
+#define configUSE_TICK_HOOK 0
+#define configUSE_MALLOC_FAILED_HOOK 0 // cause nested extern warning
+#define configCHECK_FOR_STACK_OVERFLOW 2
+
+/* Run time and task stats gathering related definitions. */
+#define configGENERATE_RUN_TIME_STATS 0
+#define configRECORD_STACK_HIGH_ADDRESS 1
+#define configUSE_TRACE_FACILITY 1 // legacy trace
+#define configUSE_STATS_FORMATTING_FUNCTIONS 0
+
+/* Co-routine definitions. */
+#define configUSE_CO_ROUTINES 0
+#define configMAX_CO_ROUTINE_PRIORITIES 2
+
+/* Software timer related definitions. */
+#define configUSE_TIMERS 1
+#define configTIMER_TASK_PRIORITY (configMAX_PRIORITIES-2)
+#define configTIMER_QUEUE_LENGTH 32
+#define configTIMER_TASK_STACK_DEPTH configMINIMAL_STACK_SIZE
+
+/* Optional functions - most linkers will remove unused functions anyway. */
+#define INCLUDE_vTaskPrioritySet 0
+#define INCLUDE_uxTaskPriorityGet 0
+#define INCLUDE_vTaskDelete 0
+#define INCLUDE_vTaskSuspend 1 // required for queue, semaphore, mutex to be blocked indefinitely with portMAX_DELAY
+#define INCLUDE_xResumeFromISR 0
+#define INCLUDE_vTaskDelayUntil 1
+#define INCLUDE_vTaskDelay 1
+#define INCLUDE_xTaskGetSchedulerState 0
+#define INCLUDE_xTaskGetCurrentTaskHandle 1
+#define INCLUDE_uxTaskGetStackHighWaterMark 0
+#define INCLUDE_xTaskGetIdleTaskHandle 0
+#define INCLUDE_xTimerGetTimerDaemonTaskHandle 0
+#define INCLUDE_pcTaskGetTaskName 0
+#define INCLUDE_eTaskGetState 0
+#define INCLUDE_xEventGroupSetBitFromISR 0
+#define INCLUDE_xTimerPendFunctionCall 0
+
+/* Define to trap errors during development. */
+// Halt CPU (breakpoint) when hitting error, only apply for Cortex M3, M4, M7
+#if defined(__ARM_ARCH_7M__) || defined (__ARM_ARCH_7EM__)
+ #define configASSERT(_exp) \
+ do {\
+ if ( !(_exp) ) { \
+ volatile uint32_t* ARM_CM_DHCSR = ((volatile uint32_t*) 0xE000EDF0UL); /* Cortex M CoreDebug->DHCSR */ \
+ if ( (*ARM_CM_DHCSR) & 1UL ) { /* Only halt mcu if debugger is attached */ \
+ taskDISABLE_INTERRUPTS(); \
+ __asm("BKPT #0\n"); \
+ }\
+ }\
+ } while(0)
+#else
+ #define configASSERT( x )
+#endif
+
+/* FreeRTOS hooks to NVIC vectors */
+#define xPortPendSVHandler PendSV_Handler
+#define xPortSysTickHandler SysTick_Handler
+#define vPortSVCHandler SVC_Handler
+
+//--------------------------------------------------------------------+
+// Interrupt nesting behavior configuration.
+//--------------------------------------------------------------------+
+
+// For Cortex-M specific: __NVIC_PRIO_BITS is defined in mcu header
+#define configPRIO_BITS 2
+
+/* The lowest interrupt priority that can be used in a call to a "set priority" function. */
+#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY ((1<