Merge pull request #310 from dhylands/pin_map

Add pin mapping code.

1 files changed, 67 insertions, 0 deletions

diff --git a/stm/pin_named_pins.c b/stm/pin_named_pins.c
new file mode 100644
index 0000000000..d68722b4a1
--- /dev/null
+++ b/stm/pin_named_pins.c
@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stm32f4xx.h>
+
+#include "misc.h"
+#include "mpconfig.h"
+#include "qstr.h"
+#include "obj.h"
+#include "runtime.h"
+
+#include "pin.h"
+
+static void pin_named_pins_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
+    pin_named_pins_obj_t *self = self_in;
+    print(env, "<Pin.%s>", self->name);
+}
+
+static void pin_named_pins_obj_load_attr(mp_obj_t self_in, qstr attr_qstr, mp_obj_t *dest) {
+    pin_named_pins_obj_t *self = self_in;
+    const char *attr = qstr_str(attr_qstr);
+    const pin_obj_t *pin = pin_find_named_pin(self->named_pins, attr);
+    if (pin) {
+        dest[0] = (mp_obj_t)pin;
+        dest[1] = MP_OBJ_NULL;
+    }
+}
+
+static const mp_obj_type_t pin_named_pins_obj_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_PinNamed,
+    .print = pin_named_pins_obj_print,
+    .load_attr = pin_named_pins_obj_load_attr,
+};
+
+const pin_named_pins_obj_t pin_board_pins_obj = {
+    { &pin_named_pins_obj_type },
+    .name = "board",
+    .named_pins = pin_board_pins,
+};
+
+const pin_named_pins_obj_t pin_cpu_pins_obj = {
+    { &pin_named_pins_obj_type },
+    .name = "cpu",
+    .named_pins = pin_cpu_pins,
+};
+
+const pin_obj_t *pin_find_named_pin(const pin_named_pin_t *named_pins, const char *name) {
+    const pin_named_pin_t *named_pin = named_pins;
+    while (named_pin->name) {
+        if (!strcmp(name, named_pin->name)) {
+            return named_pin->pin;
+        }
+        named_pin++;
+    }
+    return NULL;
+}
+
+const pin_af_obj_t *pin_find_af(const pin_obj_t *pin, uint8_t fn, uint8_t unit, uint8_t type) {
+    const pin_af_obj_t *af = pin->af;
+    for (int i = 0; i < pin->num_af; i++, af++) {
+        if (af->fn == fn && af->unit == unit && af->type == type) {
+            return af;
+        }
+    }
+    return NULL;
+}