stm: Update to compile with latest changes to core py.

stm/audio.c

@@ -127,8 +127,8 @@ mp_obj_t pyb_audio_dma(uint n_args, const mp_obj_t *args, mp_map_t *kw_args) {
     if (type->buffer_p.get_buffer == NULL) {
         nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "buffer argument must support buffer protocol"));
     }
-    buffer_info_t bufinfo;
-    type->buffer_p.get_buffer(args[1], &bufinfo, BUFFER_READ);
+    mp_buffer_info_t bufinfo;
+    type->buffer_p.get_buffer(args[1], &bufinfo, MP_BUFFER_READ);
 
     RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
 

stm/exti.c

@@ -283,7 +283,7 @@ static void exti_load_attr(mp_obj_t self_in, qstr attr_qstr, mp_obj_t *dest) {
 static mp_obj_t exti_call(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
     // type_in == exti_obj_type
 
-    mp_check_nargs(n_args, 4, 4, n_kw, 0);
+    mp_arg_check_num(n_args, n_kw, 4, 4, 0);
 
     exti_obj_t *self = m_new_obj(exti_obj_t);
     self->base.type = type_in;

stm/math.c

@@ -18,6 +18,10 @@ typedef union {
     };
 } double_s_t;
 
+double __attribute__((pcs("aapcs"))) __aeabi_i2d(int32_t x) {
+    return (float)x;
+}
+
 double __attribute__((pcs("aapcs"))) __aeabi_f2d(float x) {
     float_s_t fx={0};
     double_s_t dx={0};

stm/pin_map.c

@@ -68,7 +68,7 @@ static void pin_map_obj_print(void (*print)(void *env, const char *fmt, ...), vo
 
 static mp_obj_t pin_map_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
     pin_map_obj_t *self = self_in;
-    mp_check_nargs(n_args, 1, 2, n_kw, false);
+    mp_arg_check_num(n_args, n_kw, 1, 2, false);
 
     if (n_args > 1) {
         if (!self->map_dict) {