Diff: mbed-dev/targets/TARGET_STM/us_ticker_32b.c

Revision:

18:6a4db94011d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev/targets/TARGET_STM/us_ticker_32b.c	Sun May 14 23:18:57 2017 +0000
@@ -0,0 +1,65 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2016 ARM Limited
+ *
+ * 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.
+ */
+#include <stddef.h>
+#include "us_ticker_api.h"
+#include "PeripheralNames.h"
+#include "hal_tick.h"
+
+// A 32-bit timer is used
+#if !TIM_MST_16BIT
+
+TIM_HandleTypeDef TimMasterHandle;
+
+static int us_ticker_inited = 0;
+
+void us_ticker_init(void)
+{
+    if (us_ticker_inited) return;
+    us_ticker_inited = 1;
+
+    TimMasterHandle.Instance = TIM_MST;
+
+    HAL_InitTick(0); // The passed value is not used
+}
+
+uint32_t us_ticker_read()
+{
+    if (!us_ticker_inited) us_ticker_init();
+    return TIM_MST->CNT;
+}
+
+void us_ticker_set_interrupt(timestamp_t timestamp)
+{
+    TimMasterHandle.Instance = TIM_MST;
+    // Set new output compare value
+    __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp);
+    // Enable IT
+    __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
+}
+
+void us_ticker_disable_interrupt(void)
+{
+    TimMasterHandle.Instance = TIM_MST;
+    __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
+}
+
+void us_ticker_clear_interrupt(void)
+{
+    TimMasterHandle.Instance = TIM_MST;
+    __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
+}
+
+#endif // !TIM_MST_16BIT