stm: Wrap some functions in MICROPY_ENABLE_FLOAT.

stm/adc.c

@@ -300,7 +300,7 @@ static mp_obj_t adc_all_read_core_vbat(mp_obj_t self_in) {
     pyb_obj_adc_all_t *self = self_in;
 
     if (self->is_enabled) {
-        float data  = adc_read_core_vbat();
+        float data = adc_read_core_vbat();
         return mp_obj_new_float(data);
     } else {
         return mp_const_none;

stm/printf.c

@@ -209,6 +209,7 @@ int pfenv_printf(const pfenv_t *pfenv, const char *fmt, va_list args) {
             case 'P': // ?
                 chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 16, 'A', flags, width);
                 break;
+#if MICROPY_ENABLE_FLOAT
             case 'g':
             {
                 // This is a very hacky approach to printing floats. Micropython
@@ -234,6 +235,7 @@ int pfenv_printf(const pfenv_t *pfenv, const char *fmt, va_list args) {
                 }
                 break;
             }
+#endif
             default:
                 pfenv->print_strn(pfenv->data, fmt, 1);
                 chrs += 1;

stm/servo.c

@@ -124,7 +124,11 @@ static void servo_obj_print(void (*print)(void *env, const char *fmt, ...), void
 
 static mp_obj_t servo_obj_angle(mp_obj_t self_in, mp_obj_t angle) {
     pyb_servo_obj_t *self = self_in;
+#if MICROPY_ENABLE_FLOAT
     machine_int_t v = 152 + 85.0 * mp_obj_get_float(angle) / 90.0;
+#else
+    machine_int_t v = 152 + 85 * mp_obj_get_int(angle) / 90;
+#endif
     if (v < 65) { v = 65; }
     if (v > 210) { v = 210; }
     switch (self->servo_id) {