1 files changed, 37 insertions, 0 deletions
diff --git a/stmhal/pin_defs_stmhal.c b/stmhal/pin_defs_stmhal.c
new file mode 100644
index 0000000000..c2409dc6c0
--- /dev/null
+++ b/stmhal/pin_defs_stmhal.c
@@ -0,0 +1,37 @@
+#include "mpconfig.h"
+#include "nlr.h"
+#include "misc.h"
+#include "qstr.h"
+#include "obj.h"
+#include "runtime.h"
+#include MICROPY_HAL_H
+#include "pin.h"
+
+// Returns the pin mode. This value returned by this macro should be one of:
+// GPIO_MODE_INPUT, GPIO_MODE_OUTPUT_PP, GPIO_MODE_OUTPUT_OD,
+// GPIO_MODE_AF_PP, GPIO_MODE_AF_OD, or GPIO_MODE_ANALOG.
+
+uint32_t pin_get_mode(const pin_obj_t *pin) {
+    GPIO_TypeDef *gpio = pin->gpio;
+    uint32_t mode = (gpio->MODER >> (pin->pin * 2)) & 3;
+    if (mode != GPIO_MODE_ANALOG) {
+        if (gpio->OTYPER & pin->pin_mask) {
+            mode |= 1 << 4;
+        }
+    }
+    return mode;
+}
+
+// Returns the pin pullup/pulldown. The value returned by this macro should
+// be one of GPIO_NOPULL, GPIO_PULLUP, or GPIO_PULLDOWN.
+
+uint32_t pin_get_pull(const pin_obj_t *pin) {
+    return (pin->gpio->PUPDR >> (pin->pin * 2)) & 3;
+}
+
+// Returns the af (alternate function) index currently set for a pin.
+
+uint32_t pin_get_af(const pin_obj_t *pin) {
+    return (pin->gpio->AFR[pin->pin >> 3] >> ((pin->pin & 7) * 4)) & 0xf;
+}
+