Diff: targets/TARGET_Maxim/TARGET_MAX32620C/us_ticker.c

Revision:

186:707f6e361f3e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32620C/us_ticker.c	Fri Jun 22 16:45:37 2018 +0100
@@ -0,0 +1,112 @@
+/*******************************************************************************
+ * Copyright (c) 2016,2018 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * 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 MAXIM INTEGRATED 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.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *******************************************************************************
+ */
+
+#include <stddef.h>
+#include "us_ticker_api.h"
+#include "tmr.h"
+
+#define US_TIMER          MXC_TMR0
+#define US_TIMER_IRQn     TMR0_0_IRQn
+#define US_TIMER_PRESCALE TMR_PRESCALE_DIV_2_5
+#define US_TIMER_MODE     TMR32_MODE_COMPARE
+#define US_TIMER_WIDTH    32
+
+//******************************************************************************
+void us_ticker_init(void)
+{
+    // Disable and deconfigure
+    US_TIMER->ctrl = 0;
+    US_TIMER->term_cnt32 = 0;
+    US_TIMER->inten = 0;
+    US_TIMER->intfl = MXC_F_TMR_INTFL_TIMER0;
+
+    // Configure and enable
+    US_TIMER->ctrl = MXC_F_TMR_CTRL_ENABLE0 |
+                     (US_TIMER_MODE << MXC_F_TMR_CTRL_MODE_POS) |
+                     (US_TIMER_PRESCALE << MXC_F_TMR_CTRL_PRESCALE_POS);
+
+    NVIC_SetVector(US_TIMER_IRQn, (uint32_t)us_ticker_irq_handler);
+    NVIC_EnableIRQ(US_TIMER_IRQn);
+}
+
+//******************************************************************************
+void us_ticker_free(void)
+{
+    US_TIMER->ctrl = 0;
+}
+
+//******************************************************************************
+uint32_t us_ticker_read(void)
+{
+    return US_TIMER->count32;
+}
+
+//******************************************************************************
+void us_ticker_set_interrupt(timestamp_t timestamp)
+{
+    US_TIMER->ctrl = 0;
+    US_TIMER->term_cnt32 = (timestamp) ? timestamp : 1;
+    US_TIMER->inten = MXC_F_TMR_INTEN_TIMER0;
+    US_TIMER->ctrl = MXC_F_TMR_CTRL_ENABLE0 |
+                     (US_TIMER_MODE << MXC_F_TMR_CTRL_MODE_POS) |
+                     (US_TIMER_PRESCALE << MXC_F_TMR_CTRL_PRESCALE_POS);
+}
+
+//******************************************************************************
+void us_ticker_fire_interrupt(void)
+{
+    NVIC_SetPendingIRQ(US_TIMER_IRQn);
+}
+
+//******************************************************************************
+void us_ticker_disable_interrupt(void)
+{
+    US_TIMER->inten = 0;
+}
+
+//******************************************************************************
+void us_ticker_clear_interrupt(void)
+{
+    US_TIMER->intfl = MXC_F_TMR_INTFL_TIMER0;
+}
+
+//******************************************************************************
+const ticker_info_t* us_ticker_get_info(void)
+{
+    static const ticker_info_t info = {
+        RO_FREQ >> US_TIMER_PRESCALE,
+        US_TIMER_WIDTH
+    };
+
+    return &info;
+}