stm32: Use mp_printf with MICROPY_ERROR_PRINTER for uncaught exceptions.

ports/stm32/extint.c

@@ -672,7 +672,7 @@ void Handle_EXTI_Irq(uint32_t line) {
                     // Uncaught exception; disable the callback so it doesn't run again.
                     *cb = mp_const_none;
                     extint_disable(line);
-                    printf("Uncaught exception in ExtInt interrupt handler line %u\n", (unsigned int)line);
+                    mp_printf(MICROPY_ERROR_PRINTER, "uncaught exception in ExtInt interrupt handler line %u\n", (unsigned int)line);
                     mp_obj_print_exception(&mp_plat_print, MP_OBJ_FROM_PTR(nlr.ret_val));
                 }
                 gc_unlock();

ports/stm32/pyb_can.c

@@ -24,7 +24,6 @@
  * THE SOFTWARE.
  */
 
-#include <stdio.h>
 #include <string.h>
 
 #include "py/objarray.h"
@@ -875,7 +874,7 @@ void pyb_can_handle_callback(pyb_can_obj_t *self, uint fifo_id, mp_obj_t callbac
         } else {
             // Uncaught exception; disable the callback so it doesn't run again.
             pyb_can_rxcallback(MP_OBJ_FROM_PTR(self), MP_OBJ_NEW_SMALL_INT(fifo_id), mp_const_none);
-            printf("uncaught exception in CAN(%u) rx interrupt handler\n", self->can_id);
+            mp_printf(MICROPY_ERROR_PRINTER, "uncaught exception in CAN(%u) rx interrupt handler\n", self->can_id);
             mp_obj_print_exception(&mp_plat_print, MP_OBJ_FROM_PTR(nlr.ret_val));
         }
         gc_unlock();

ports/stm32/timer.c

@@ -25,7 +25,6 @@
  */
 
 #include <stdint.h>
-#include <stdio.h>
 #include <string.h>
 
 #include "py/runtime.h"
@@ -1548,9 +1547,9 @@ STATIC void timer_handle_irq_channel(pyb_timer_obj_t *tim, uint8_t channel, mp_o
                     tim->callback = mp_const_none;
                     __HAL_TIM_DISABLE_IT(&tim->tim, irq_mask);
                     if (channel == 0) {
-                        printf("uncaught exception in Timer(%u) interrupt handler\n", tim->tim_id);
+                        mp_printf(MICROPY_ERROR_PRINTER, "uncaught exception in Timer(%u) interrupt handler\n", tim->tim_id);
                     } else {
-                        printf("uncaught exception in Timer(%u) channel %u interrupt handler\n", tim->tim_id, channel);
+                        mp_printf(MICROPY_ERROR_PRINTER, "uncaught exception in Timer(%u) channel %u interrupt handler\n", tim->tim_id, channel);
                     }
                     mp_obj_print_exception(&mp_plat_print, MP_OBJ_FROM_PTR(nlr.ret_val));
                 }
@@ -1591,7 +1590,7 @@ void timer_irq_handler(uint tim_id) {
         if (unhandled != 0) {
             __HAL_TIM_DISABLE_IT(&tim->tim, unhandled);
             __HAL_TIM_CLEAR_IT(&tim->tim, unhandled);
-            printf("Unhandled interrupt SR=0x%02x (now disabled)\n", (unsigned int)unhandled);
+            mp_printf(MICROPY_ERROR_PRINTER, "unhandled interrupt SR=0x%02x (now disabled)\n", (unsigned int)unhandled);
         }
     }
 }