4 files changed, 30 insertions, 4 deletions
diff --git a/ports/raspberrypi/common-hal/microcontroller/__init__.c b/ports/raspberrypi/common-hal/microcontroller/__init__.c
index 774e313bb..85bfc329d 100644
--- a/ports/raspberrypi/common-hal/microcontroller/__init__.c
+++ b/ports/raspberrypi/common-hal/microcontroller/__init__.c
@@ -80,6 +80,7 @@ void common_hal_mcu_reset(void) {
 
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
+#if CIRCUITPY_PROCESSOR_COUNT > 1
 static const mcu_processor_obj_t processor0 = {
     .base = {
         .type = &mcu_processor_type,
@@ -92,7 +93,7 @@ static const mcu_processor_obj_t processor1 = {
     },
 };
 
-const mp_rom_obj_tuple_t common_hal_mcu_processor_obj = {
+const mp_rom_obj_tuple_t common_hal_multi_processor_obj = {
     {&mp_type_tuple},
     CIRCUITPY_PROCESSOR_COUNT,
     {
@@ -100,6 +101,13 @@ const mp_rom_obj_tuple_t common_hal_mcu_processor_obj = {
         MP_ROM_PTR(&processor1)
     }
 };
+#endif
+
+const mcu_processor_obj_t common_hal_mcu_processor_obj = {
+    .base = {
+        .type = &mcu_processor_type,
+    },
+};
 
 #if CIRCUITPY_NVM && CIRCUITPY_INTERNAL_NVM_SIZE > 0
 // The singleton nvm.ByteArray object.
diff --git a/shared-bindings/microcontroller/Processor.c b/shared-bindings/microcontroller/Processor.c
index 90cc02fe3..67001c831 100644
--- a/shared-bindings/microcontroller/Processor.c
+++ b/shared-bindings/microcontroller/Processor.c
@@ -41,7 +41,15 @@
 //|
 //|        import microcontroller
 //|        print(microcontroller.cpu.frequency)
-//|        print(microcontroller.cpu.temperature)"""
+//|        print(microcontroller.cpu.temperature)
+//|
+//|        Note that on chips with more than one cpu (such as the RP2040)
+//|        microcontroller.cpu will return the value for CPU 0.
+//|        To get values from other CPUs use microcontroller.cpus indexed by
+//|        the number of the desired cpu. i.e.
+//|
+//|        print(microcontroller.cpus[0].temperature)
+//|        print(microcontroller.cpus[1].frequency)"""
 //|
 
 //|     def __init__(self) -> None:
diff --git a/shared-bindings/microcontroller/__init__.c b/shared-bindings/microcontroller/__init__.c
index 035587c30..dba66fa4f 100644
--- a/shared-bindings/microcontroller/__init__.c
+++ b/shared-bindings/microcontroller/__init__.c
@@ -53,7 +53,13 @@
 //| cpu: Processor
 //| """CPU information and control, such as ``cpu.temperature`` and ``cpu.frequency``
 //| (clock frequency).
-//| This object is the sole instance of `microcontroller.Processor`."""
+//| This object is an instance of `microcontroller.Processor`."""
+//|
+
+//| cpus: Processor
+//| """CPU information and control, such as ``cpus[0].temperature`` and ``cpus[1].frequency``
+//| (clock frequency) on chips with more than 1 cpu. The index selects which cpu.
+//| This object is an instance of `microcontroller.Processor`."""
 //|
 
 //| def delay_us(delay: int) -> None:
@@ -155,6 +161,9 @@ const mp_obj_module_t mcu_pin_module = {
 STATIC const mp_rom_map_elem_t mcu_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_microcontroller) },
     { MP_ROM_QSTR(MP_QSTR_cpu),  MP_ROM_PTR(&common_hal_mcu_processor_obj) },
+#if CIRCUITPY_PROCESSOR_COUNT > 1
+    { MP_ROM_QSTR(MP_QSTR_cpus),  MP_ROM_PTR(&common_hal_multi_processor_obj) },
+#endif
     { MP_ROM_QSTR(MP_QSTR_delay_us), MP_ROM_PTR(&mcu_delay_us_obj) },
     { MP_ROM_QSTR(MP_QSTR_disable_interrupts), MP_ROM_PTR(&mcu_disable_interrupts_obj) },
     { MP_ROM_QSTR(MP_QSTR_enable_interrupts), MP_ROM_PTR(&mcu_enable_interrupts_obj) },
diff --git a/shared-bindings/microcontroller/__init__.h b/shared-bindings/microcontroller/__init__.h
index 39d3e718b..733127d56 100644
--- a/shared-bindings/microcontroller/__init__.h
+++ b/shared-bindings/microcontroller/__init__.h
@@ -48,7 +48,8 @@ extern const mp_obj_dict_t mcu_pin_globals;
 #if CIRCUITPY_PROCESSOR_COUNT == 1
 extern const mcu_processor_obj_t common_hal_mcu_processor_obj;
 #elif CIRCUITPY_PROCESSOR_COUNT > 1
-extern const mp_rom_obj_tuple_t common_hal_mcu_processor_obj;
+extern const mcu_processor_obj_t common_hal_mcu_processor_obj;
+extern const mp_rom_obj_tuple_t common_hal_multi_processor_obj;
 #else
 #error "Invalid processor count"
 #endif