stm32/pin: Enable GPIO clock of pin if it's constructed without init.

dpgeorge · dpgeorge · commit 05cd17e36fbc · 2021-09-02T20:28:53.000+10:00
Fixes issue #7363. Signed-off-by: Damien George <damien@micropython.org>
diff --git a/ports/stm32/pin.c b/ports/stm32/pin.c
@@ -256,6 +256,9 @@ mp_obj_t mp_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw,
         mp_map_t kw_args;
         mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
         pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);
+    } else {
+        // enable the peripheral clock so pin reading at least works
+        mp_hal_gpio_clock_enable(pin->gpio);
     }
 
     return MP_OBJ_FROM_PTR(pin);

Original file line number	Diff line number	Diff line change
`@@ -256,6 +256,9 @@ mp_obj_t mp_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw,`
`256`	`256`	`mp_map_t kw_args;`
`257`	`257`	`mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);`
`258`	`258`	`pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);`
	`259`	`+ } else {`
	`260`	`+ // enable the peripheral clock so pin reading at least works`
	`261`	`+ mp_hal_gpio_clock_enable(pin->gpio);`
`259`	`262`	`}`
`260`	`263`
`261`	`264`	`return MP_OBJ_FROM_PTR(pin);`