stm32: Add method for statically configuring pin alternate function.

Works with pins declared normally in mpconfigboard.h, eg. (pin_XX), as well
as (pyb_pin_XX).

Provides new mp_hal_pin_config_alt_static(pin_obj, mode, pull, fn_type)
function declared in pin_static_af.h to allow configuring pin alternate
functions by name at compile time.

1 files changed, 46 insertions, 0 deletions

diff --git a/ports/stm32/pin_static_af.h b/ports/stm32/pin_static_af.h
new file mode 100644
index 000000000..b73944d6f
--- /dev/null
+++ b/ports/stm32/pin_static_af.h
@@ -0,0 +1,46 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013, 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_STM32_PIN_STATIC_AF_H
+#define MICROPY_INCLUDED_STM32_PIN_STATIC_AF_H
+
+#include "py/mphal.h"
+#include "genhdr/pins.h"
+#include "genhdr/pins_af_defs.h"
+
+#if 0 // Enable to test if AF's are statically compiled
+#define mp_hal_pin_config_alt_static(pin_obj, mode, pull, fn_type) \
+        mp_hal_pin_config(pin_obj, mode, pull, fn_type(pin_obj)); \
+        _Static_assert(fn_type(pin_obj) != -1, ""); \
+        _Static_assert(__builtin_constant_p(fn_type(pin_obj)) == 1, "")
+
+#else
+
+#define mp_hal_pin_config_alt_static(pin_obj, mode, pull, fn_type) \
+        mp_hal_pin_config(pin_obj, mode, pull, fn_type(pin_obj)) /* Overflow Error => alt func not found */
+
+#endif
+
+#endif // MICROPY_INCLUDED_STM32_PIN_STATIC_AF_H