1 files changed, 74 insertions, 0 deletions
diff --git a/stmhal/irq.c b/stmhal/irq.c
new file mode 100644
index 0000000000..2d6a990beb
--- /dev/null
+++ b/stmhal/irq.c
@@ -0,0 +1,74 @@
+/*
+ * This file is part of the Micro Python 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 "mpconfig.h"
+#include "misc.h"
+#include "nlr.h"
+#include "qstr.h"
+#include "obj.h"
+#include "irq.h"
+
+#include MICROPY_HAL_H
+
+void enable_irq(mp_int_t enable) {
+  // With __set_PRIMASK 1 = disable, 0 = enable
+    __set_PRIMASK(!enable);
+}
+
+mp_int_t disable_irq(void) {
+    mp_int_t enabled = !__get_PRIMASK();
+    __disable_irq();
+    return enabled;
+}
+
+/// \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.
+STATIC mp_obj_t pyb_disable_irq(void) {
+  return MP_BOOL(disable_irq());
+}
+MP_DEFINE_CONST_FUN_OBJ_0(pyb_disable_irq_obj, pyb_disable_irq);
+
+/// \function enable_irq()
+/// Enable interrupt requests.
+STATIC mp_obj_t pyb_enable_irq(uint n_args, const mp_obj_t *arg) {
+    mp_int_t enabled = true;
+    if (n_args > 0) {
+        enabled = mp_obj_is_true(arg[0]);
+    }
+    enable_irq(enabled);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_enable_irq_obj, 0, 1, pyb_enable_irq);