1 files changed, 100 insertions, 0 deletions

diff --git a/lib/chibios/os/hal/ports/STM32/LLD/EXTIv1/stm32_exti21.inc b/lib/chibios/os/hal/ports/STM32/LLD/EXTIv1/stm32_exti21.inc
new file mode 100644
index 000000000..350091bc5
--- /dev/null
+++ b/lib/chibios/os/hal/ports/STM32/LLD/EXTIv1/stm32_exti21.inc
@@ -0,0 +1,100 @@
+/*
+    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/**
+ * @file    EXTIv1/stm32_exti21.inc
+ * @brief   Shared EXTI21 handler.
+ *
+ * @addtogroup STM32_EXTI21_HANDLER
+ * @{
+ */
+
+/*===========================================================================*/
+/* Driver local definitions.                                                 */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks.                                       */
+/*===========================================================================*/
+
+/* Priority settings checks.*/
+#if !defined(STM32_IRQ_EXTI21_PRIORITY)
+#error "STM32_IRQ_EXTI21_PRIORITY not defined in mcuconf.h"
+#endif
+
+#if !OSAL_IRQ_IS_VALID_PRIORITY(STM32_IRQ_EXTI21_PRIORITY)
+#error "Invalid IRQ priority assigned to STM32_IRQ_EXTI21_PRIORITY"
+#endif
+
+/*===========================================================================*/
+/* Driver exported variables.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables.                                                   */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions.                                                   */
+/*===========================================================================*/
+
+static inline void exti21_irq_init(void) {
+#if defined(STM32_EXTI21_IS_USED)
+  nvicEnableVector(STM32_EXTI21_NUMBER, STM32_IRQ_EXTI21_PRIORITY);
+#endif
+}
+
+static inline void exti21_irq_deinit(void) {
+#if defined(STM32_EXTI21_IS_USED)
+  nvicDisableVector(STM32_EXTI21_NUMBER);
+#endif
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers.                                                */
+/*===========================================================================*/
+
+#if defined(STM32_EXTI21_IS_USED) || defined(__DOXYGEN__)
+#if !defined(STM32_DISABLE_EXTI21_HANDLER)
+/**
+ * @brief   EXTI[21] interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(STM32_EXTI21_HANDLER) {
+  uint32_t pr;
+
+  OSAL_IRQ_PROLOGUE();
+
+  extiGetAndClearGroup1(1U << 21, pr);
+
+  /* Could be unused.*/
+  (void)pr;
+
+#if defined(STM32_EXTI21_ISR)
+  STM32_EXTI21_ISR(pr, 21);
+#endif
+
+  OSAL_IRQ_EPILOGUE();
+}
+#endif
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions.                                                */
+/*===========================================================================*/
+
+/** @} */