Merge commit '1fe4406f374291ab2e86e95a97341fd9c475fcb8'

[qmk_firmware.git] / tmk_core / tool / mbed / mbed-sdk / libraries / mbed / targets / hal / TARGET_Freescale / TARGET_KPSDK_MCUS / us_ticker.c

diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/us_ticker.c b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/us_ticker.c
new file mode 100644 (file)
index 0000000..4c14a6b
--- /dev/null
+++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/us_ticker.c
@@ -0,0 +1,82 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 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 "fsl_pit_hal.h"
+#include "fsl_sim_hal.h"
+#include "fsl_clock_manager.h"
+
+static int us_ticker_inited = 0;
+
+void us_ticker_init(void) {
+    if (us_ticker_inited) {
+        return;
+    }
+    us_ticker_inited = 1;
+    
+    //Common for ticker/timer
+    uint32_t busClock;
+    CLOCK_SYS_EnablePitClock(0);
+    PIT_HAL_Enable(PIT_BASE);
+    CLOCK_SYS_GetFreq(kBusClock, &busClock);
+    
+    //Timer
+    PIT_HAL_SetTimerPeriodByCount(PIT_BASE, 0, busClock / 1000000 - 1);
+    PIT_HAL_SetTimerPeriodByCount(PIT_BASE, 1, 0xFFFFFFFF);
+    PIT_HAL_SetTimerChainCmd(PIT_BASE, 1, true);
+    PIT_HAL_StartTimer(PIT_BASE, 0);
+    PIT_HAL_StartTimer(PIT_BASE, 1);
+    
+    //Ticker
+    PIT_HAL_SetTimerPeriodByCount(PIT_BASE, 2, busClock / 1000000 - 1);
+    PIT_HAL_SetTimerChainCmd(PIT_BASE, 3, true);
+    NVIC_SetVector(PIT3_IRQn, (uint32_t)us_ticker_irq_handler);
+    NVIC_EnableIRQ(PIT3_IRQn);
+}
+
+
+uint32_t us_ticker_read() {
+    if (!us_ticker_inited) {
+        us_ticker_init();
+    }
+
+    return ~(PIT_HAL_ReadTimerCount(PIT_BASE, 1));
+}
+
+void us_ticker_disable_interrupt(void) {
+    PIT_HAL_SetIntCmd(PIT_BASE, 3, false);
+}
+
+void us_ticker_clear_interrupt(void) {
+    PIT_HAL_ClearIntFlag(PIT_BASE, 3);
+}
+
+void us_ticker_set_interrupt(timestamp_t timestamp) {
+    int delta = (int)(timestamp - us_ticker_read());
+    if (delta <= 0) {
+        // This event was in the past:
+        us_ticker_irq_handler();
+        return;
+    }
+ 
+    PIT_HAL_StopTimer(PIT_BASE, 3);
+    PIT_HAL_StopTimer(PIT_BASE, 2);
+    PIT_HAL_SetTimerPeriodByCount(PIT_BASE, 3, (uint32_t)delta);
+    PIT_HAL_SetIntCmd(PIT_BASE, 3, true);
+    PIT_HAL_StartTimer(PIT_BASE, 3);
+    PIT_HAL_StartTimer(PIT_BASE, 2);
+}