stm32: Use MP_REGISTER_ROOT_POINTER().

This uses MP_REGISTER_ROOT_POINTER() to register all port-specific root
pointers in the stm32 port.

Signed-off-by: David Lechner <david@pybricks.com>

ports/stm32/extint.c

@@ -720,3 +720,5 @@ void Handle_EXTI_Irq(uint32_t line) {
         }
     }
 }
+
+MP_REGISTER_ROOT_POINTER(mp_obj_t pyb_extint_callback[PYB_EXTI_NUM_VECTORS]);

ports/stm32/machine_i2s.c

@@ -1125,4 +1125,6 @@ const mp_obj_type_t machine_i2s_type = {
     .locals_dict = (mp_obj_dict_t *)&machine_i2s_locals_dict,
 };
 
+MP_REGISTER_ROOT_POINTER(struct _machine_i2s_obj_t *machine_i2s_obj[MICROPY_HW_MAX_I2S]);
+
 #endif // MICROPY_HW_ENABLE_I2S

ports/stm32/main.c

@@ -659,3 +659,5 @@ soft_reset_exit:
 
     goto soft_reset;
 }
+
+MP_REGISTER_ROOT_POINTER(mp_obj_t pyb_config_main);

ports/stm32/mpconfigport.h

@@ -243,35 +243,6 @@ extern const struct _mod_network_nic_type_t mod_network_nic_type_cc3k;
 #endif
 
 #define MICROPY_PORT_ROOT_POINTERS \
-    mp_obj_t pyb_hid_report_desc; \
-    \
-    mp_obj_t pyb_config_main; \
-    \
-    mp_obj_t pyb_switch_callback; \
-    \
-    mp_obj_t pin_class_mapper; \
-    mp_obj_t pin_class_map_dict; \
-    \
-    mp_obj_t pyb_extint_callback[PYB_EXTI_NUM_VECTORS]; \
-    \
-    /* pointers to all Timer objects (if they have been created) */ \
-    struct _pyb_timer_obj_t *pyb_timer_obj_all[MICROPY_HW_MAX_TIMER]; \
-    \
-    /* stdio is repeated on this UART object if it's not null */ \
-    struct _pyb_uart_obj_t *pyb_stdio_uart; \
-    \
-    /* pointers to all UART objects (if they have been created) */ \
-    struct _pyb_uart_obj_t *pyb_uart_obj_all[MICROPY_HW_MAX_UART + MICROPY_HW_MAX_LPUART]; \
-    \
-    /* pointers to all CAN objects (if they have been created) */ \
-    struct _pyb_can_obj_t *pyb_can_obj_all[MICROPY_HW_MAX_CAN]; \
-    \
-    /* pointers to all I2S objects (if they have been created) */ \
-    struct _machine_i2s_obj_t *machine_i2s_obj[MICROPY_HW_MAX_I2S]; \
-    \
-    /* USB_VCP IRQ callbacks (if they have been set) */ \
-    mp_obj_t pyb_usb_vcp_irq[MICROPY_HW_USB_CDC_NUM]; \
-    \
     /* root pointers defined by a board */ \
         MICROPY_BOARD_ROOT_POINTERS \
 

ports/stm32/mphalport.c

@@ -177,3 +177,5 @@ void mp_hal_get_mac_ascii(int idx, size_t chr_off, size_t chr_len, char *dest) {
         *dest++ = hexchr[mac[chr_off >> 1] >> (4 * (1 - (chr_off & 1))) & 0xf];
     }
 }
+
+MP_REGISTER_ROOT_POINTER(struct _pyb_uart_obj_t *pyb_stdio_uart);

ports/stm32/pin.c

@@ -675,3 +675,6 @@ const mp_obj_type_t pin_af_type = {
     .print = pin_af_obj_print,
     .locals_dict = (mp_obj_dict_t *)&pin_af_locals_dict,
 };
+
+MP_REGISTER_ROOT_POINTER(mp_obj_t pin_class_mapper);
+MP_REGISTER_ROOT_POINTER(mp_obj_t pin_class_map_dict);

ports/stm32/pyb_can.c

@@ -1081,4 +1081,6 @@ const mp_obj_type_t pyb_can_type = {
     .locals_dict = (mp_obj_dict_t *)&pyb_can_locals_dict,
 };
 
+MP_REGISTER_ROOT_POINTER(struct _pyb_can_obj_t *pyb_can_obj_all[MICROPY_HW_MAX_CAN]);
+
 #endif // MICROPY_HW_ENABLE_CAN

ports/stm32/timer.c

@@ -1684,3 +1684,5 @@ void timer_irq_handler(uint tim_id) {
         }
     }
 }
+
+MP_REGISTER_ROOT_POINTER(struct _pyb_timer_obj_t *pyb_timer_obj_all[MICROPY_HW_MAX_TIMER]);

ports/stm32/uart.c

@@ -1202,3 +1202,5 @@ const mp_irq_methods_t uart_irq_methods = {
     .trigger = uart_irq_trigger,
     .info = uart_irq_info,
 };
+
+MP_REGISTER_ROOT_POINTER(struct _pyb_uart_obj_t *pyb_uart_obj_all[MICROPY_HW_MAX_UART + MICROPY_HW_MAX_LPUART]);

ports/stm32/usb.c

@@ -1152,4 +1152,9 @@ void USR_KEYBRD_ProcessData(uint8_t pbuf) {
 
 #endif // USE_HOST_MODE
 
+#if MICROPY_HW_USB_HID
+MP_REGISTER_ROOT_POINTER(mp_obj_t pyb_hid_report_desc);
+#endif
+MP_REGISTER_ROOT_POINTER(mp_obj_t pyb_usb_vcp_irq[MICROPY_HW_USB_CDC_NUM]);
+
 #endif // MICROPY_HW_ENABLE_USB

ports/stm32/usrsw.c

@@ -143,4 +143,6 @@ const mp_obj_type_t pyb_switch_type = {
     .locals_dict = (mp_obj_dict_t *)&pyb_switch_locals_dict,
 };
 
+MP_REGISTER_ROOT_POINTER(mp_obj_t pyb_switch_callback);
+
 #endif // MICROPY_HW_HAS_SWITCH