Fix timer overflow code.

Teensy doesn't need to worry about overflows since all of
its timers are only 16-bit.

For PWM, the pulse width needs to be able to vary from 0..period+1
(pulse-width == period+1 corresponds to 100% PWM)

I couldn't test the 0xffffffff cases since we can't currently get a
period that big in python. With a prescaler of 0, that corresponds
to a freq of 0.039 (i.e. cycle every 25.56 seconds), and we can't
set that using freq or period.

I also tested both stmhal and teensy with floats disabled, which
required a few other code changes to compile.

1 files changed, 2 insertions, 0 deletions

diff --git a/extmod/moductypes.c b/extmod/moductypes.c
index 73a8db7cc0..3e35ed682a 100644
--- a/extmod/moductypes.c
+++ b/extmod/moductypes.c
@@ -309,10 +309,12 @@ STATIC mp_obj_t get_aligned(uint val_type, void *p, mp_int_t index) {
         case UINT64:
         case INT64:
             return mp_obj_new_int_from_ll(((int64_t*)p)[index]);
+        #if MICROPY_PY_BUILTINS_FLOAT
         case FLOAT32:
             return mp_obj_new_float(((float*)p)[index]);
         case FLOAT64:
             return mp_obj_new_float(((double*)p)[index]);
+        #endif
         default:
             assert(0);
             return MP_OBJ_NULL;