zephyr/machine_pin: Implement pin protocol for machine.Signal support.

zephyr/machine_pin.c

@@ -81,7 +81,7 @@ STATIC mp_obj_t machine_pin_obj_init_helper(machine_pin_obj_t *self, mp_uint_t n
 }
 
 // constructor(drv_name, pin, ...)
-STATIC mp_obj_t machine_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
+mp_obj_t mp_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
     mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
 
     // get the wanted port
@@ -154,6 +154,24 @@ STATIC mp_obj_t machine_pin_high(mp_obj_t self_in) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_pin_high_obj, machine_pin_high);
 
+STATIC mp_uint_t machine_pin_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
+    (void)errcode;
+    machine_pin_obj_t *self = self_in;
+
+    switch (request) {
+        case MP_PIN_READ: {
+            uint32_t pin_val;
+            gpio_pin_read(self->port, self->pin, &pin_val);
+            return pin_val;
+        }
+        case MP_PIN_WRITE: {
+            gpio_pin_write(self->port, self->pin, arg);
+            return 0;
+        }
+    }
+    return -1;
+}
+
 STATIC const mp_map_elem_t machine_pin_locals_dict_table[] = {
     // instance methods
     { MP_OBJ_NEW_QSTR(MP_QSTR_init),    (mp_obj_t)&machine_pin_init_obj },
@@ -170,11 +188,16 @@ STATIC const mp_map_elem_t machine_pin_locals_dict_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(machine_pin_locals_dict, machine_pin_locals_dict_table);
 
+STATIC const mp_pin_p_t machine_pin_pin_p = {
+    .ioctl = machine_pin_ioctl,
+};
+
 const mp_obj_type_t machine_pin_type = {
     { &mp_type_type },
     .name = MP_QSTR_Pin,
     .print = machine_pin_print,
-    .make_new = machine_pin_make_new,
+    .make_new = mp_pin_make_new,
     .call = machine_pin_call,
+    .protocol = &machine_pin_pin_p,
     .locals_dict = (mp_obj_t)&machine_pin_locals_dict,
 };

zephyr/mpconfigport.h

@@ -58,6 +58,7 @@
 #define MICROPY_PY_IO               (0)
 #define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
 #define MICROPY_PY_MACHINE          (1)
+#define MICROPY_PY_MACHINE_PIN_MAKE_NEW mp_pin_make_new
 #define MICROPY_MODULE_WEAK_LINKS   (1)
 #define MICROPY_PY_STRUCT           (0)
 #ifdef CONFIG_NETWORKING