1 files changed, 76 insertions, 0 deletions
diff --git a/ports/stm32/irq.c b/ports/stm32/irq.c
new file mode 100644
index 000000000..d6db8e83d
--- /dev/null
+++ b/ports/stm32/irq.c
@@ -0,0 +1,76 @@
+/*
+ * 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.
+ */
+
+#include "py/nlr.h"
+#include "py/obj.h"
+#include "py/mphal.h"
+#include "irq.h"
+
+/// \moduleref pyb
+
+#if IRQ_ENABLE_STATS
+uint32_t irq_stats[FPU_IRQn + 1] = {0};
+#endif
+
+/// \function wfi()
+/// Wait for an interrupt.
+/// This executies a `wfi` instruction which reduces power consumption
+/// of the MCU until an interrupt occurs, at which point execution continues.
+STATIC mp_obj_t pyb_wfi(void) {
+    __WFI();
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_0(pyb_wfi_obj, pyb_wfi);
+
+/// \function disable_irq()
+/// Disable interrupt requests.
+/// Returns the previous IRQ state: `False`/`True` for disabled/enabled IRQs
+/// respectively.  This return value can be passed to enable_irq to restore
+/// the IRQ to its original state.
+STATIC mp_obj_t pyb_disable_irq(void) {
+    return mp_obj_new_bool(disable_irq() == IRQ_STATE_ENABLED);
+}
+MP_DEFINE_CONST_FUN_OBJ_0(pyb_disable_irq_obj, pyb_disable_irq);
+
+/// \function enable_irq(state=True)
+/// Enable interrupt requests.
+/// If `state` is `True` (the default value) then IRQs are enabled.
+/// If `state` is `False` then IRQs are disabled.  The most common use of
+/// this function is to pass it the value returned by `disable_irq` to
+/// exit a critical section.
+STATIC mp_obj_t pyb_enable_irq(uint n_args, const mp_obj_t *arg) {
+    enable_irq((n_args == 0 || mp_obj_is_true(arg[0])) ? IRQ_STATE_ENABLED : IRQ_STATE_DISABLED);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_enable_irq_obj, 0, 1, pyb_enable_irq);
+
+#if IRQ_ENABLE_STATS
+// return a memoryview of the irq statistics array
+STATIC mp_obj_t pyb_irq_stats(void) {
+    return mp_obj_new_memoryview(0x80 | 'I', MP_ARRAY_SIZE(irq_stats), &irq_stats[0]);
+}
+MP_DEFINE_CONST_FUN_OBJ_0(pyb_irq_stats_obj, pyb_irq_stats);
+#endif