Import Mbed OS hard-float snapshot

targets/TARGET_Cypress/TARGET_PSOC6/cy_lp_ticker_api.c

@@ -0,0 +1,98 @@
+/*
+ * mbed Microcontroller Library
+ * Copyright (c) 2017-2018 Future Electronics
+ * Copyright (c) 2019, Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 "lp_ticker_api.h"
+#include "mbed_error.h"
+#include "cyhal_lptimer.h"
+#include "cycfg.h"
+
+#if DEVICE_LPTICKER
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static cyhal_lptimer_t cy_lptimer0;
+static bool cy_lptimer_initialized = false;
+
+static void cy_lp_ticker_handler(MBED_UNUSED void *unused1, MBED_UNUSED cyhal_lptimer_event_t unused2)
+{
+    lp_ticker_irq_handler();
+}
+
+void lp_ticker_init(void)
+{
+    // It should be safe to call this function more than once
+    if (!cy_lptimer_initialized) {
+        if (CY_RSLT_SUCCESS != cyhal_lptimer_init(&cy_lptimer0)) {
+            MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_lptimer_init");
+        }
+        cy_lptimer_initialized = true;
+    }
+    lp_ticker_disable_interrupt();
+    cyhal_lptimer_register_callback(&cy_lptimer0, &cy_lp_ticker_handler, NULL);
+}
+
+void lp_ticker_free(void)
+{
+    cyhal_lptimer_free(&cy_lptimer0);
+    cy_lptimer_initialized = false;
+}
+
+uint32_t lp_ticker_read(void)
+{
+    return cyhal_lptimer_read(&cy_lptimer0);
+}
+
+void lp_ticker_set_interrupt(timestamp_t timestamp)
+{
+    if (CY_RSLT_SUCCESS != cyhal_lptimer_set_match(&cy_lptimer0, (uint32_t)timestamp)) {
+        MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER, MBED_ERROR_CODE_FAILED_OPERATION), "cyhal_lptimer_set_match");
+    }
+}
+
+void lp_ticker_disable_interrupt(void)
+{
+    cyhal_lptimer_enable_event(&cy_lptimer0, CYHAL_LPTIMER_COMPARE_MATCH, CYHAL_ISR_PRIORITY_DEFAULT, false);
+}
+
+void lp_ticker_clear_interrupt(void)
+{
+    // LPTIMER driver does this automatically; nothing to do
+}
+
+void lp_ticker_fire_interrupt(void)
+{
+    cyhal_lptimer_irq_trigger(&cy_lptimer0);
+}
+
+const ticker_info_t *lp_ticker_get_info(void)
+{
+    static const ticker_info_t info = {
+        /* .frequency = */ CY_CFG_SYSCLK_CLKLF_FREQ_HZ,
+        /* .bits =      */ 32
+    };
+    return &info;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif