Diff: targets/hal/TARGET_Freescale/TARGET_K20XX/rtc_api.c

Revision:

144:ef7eb2e8f9f7

Parent:

0:9b334a45a8ff

--- a/targets/hal/TARGET_Freescale/TARGET_K20XX/rtc_api.c	Tue Aug 02 14:07:36 2016 +0000
+++ b/targets/hal/TARGET_Freescale/TARGET_K20XX/rtc_api.c	Fri Sep 02 15:07:44 2016 +0100
@@ -1,91 +1,91 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2015 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 "rtc_api.h"
-
-static void init(void) {
-    // enable PORTC clock
-    SIM->SCGC5 |= SIM_SCGC5_PORTC_MASK;
-
-    // enable RTC clock
-    SIM->SCGC6 |= SIM_SCGC6_RTC_MASK;
-
-    // OSC32 as source
-    SIM->SOPT1 &= ~SIM_SOPT1_OSC32KSEL_MASK;
-    SIM->SOPT1 |= SIM_SOPT1_OSC32KSEL(0);
-}
-
-void rtc_init(void) {
-    init();
-    
-    // Enable the oscillator
-#if defined (TARGET_K20D50M)
-    RTC->CR |= RTC_CR_OSCE_MASK;
-#else
-    // Teensy3.1 requires 20pF MCU loading capacitors for 32KHz RTC oscillator
-    /* RTC->CR: SC2P=0,SC4P=1,SC8P=0,SC16P=1,CLKO=0,OSCE=1,UM=0,SUP=0,SPE=0,SWR=0 */
-    RTC->CR |= RTC_CR_OSCE_MASK |RTC_CR_SC16P_MASK | RTC_CR_SC4P_MASK; 
-#endif
-
-    //Configure the TSR. default value: 1
-    RTC->TSR = 1;
-
-    // enable counter
-    RTC->SR |= RTC_SR_TCE_MASK;
-}
-
-void rtc_free(void) {
-    // [TODO]
-}
-
-/*
- * Little check routine to see if the RTC has been enabled
- * 0 = Disabled, 1 = Enabled
- */
-int rtc_isenabled(void) {
-    // even if the RTC module is enabled,
-    // as we use RTC_CLKIN and an external clock,
-    // we need to reconfigure the pins. That is why we
-    // call init() if the rtc is enabled
-
-    // if RTC not enabled return 0
-    SIM->SCGC5 |= SIM_SCGC5_PORTC_MASK;
-    SIM->SCGC6 |= SIM_SCGC6_RTC_MASK;
-    if ((RTC->SR & RTC_SR_TCE_MASK) == 0)
-        return 0;
-
-    init();
-    return 1;
-}
-
-time_t rtc_read(void) {
-    return RTC->TSR;
-}
-
-void rtc_write(time_t t) {
-    // disable counter
-    RTC->SR &= ~RTC_SR_TCE_MASK;
-
-    // we do not write 0 into TSR
-    // to avoid invalid time
-    if (t == 0)
-        t = 1;
-
-    // write seconds
-    RTC->TSR = t;
-
-    // re-enable counter
-    RTC->SR |= RTC_SR_TCE_MASK;
-}
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2015 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 "rtc_api.h"
+
+static void init(void) {
+    // enable PORTC clock
+    SIM->SCGC5 |= SIM_SCGC5_PORTC_MASK;
+
+    // enable RTC clock
+    SIM->SCGC6 |= SIM_SCGC6_RTC_MASK;
+
+    // OSC32 as source
+    SIM->SOPT1 &= ~SIM_SOPT1_OSC32KSEL_MASK;
+    SIM->SOPT1 |= SIM_SOPT1_OSC32KSEL(0);
+}
+
+void rtc_init(void) {
+    init();
+    
+    // Enable the oscillator
+#if defined (TARGET_K20D50M)
+    RTC->CR |= RTC_CR_OSCE_MASK;
+#else
+    // Teensy3.1 requires 20pF MCU loading capacitors for 32KHz RTC oscillator
+    /* RTC->CR: SC2P=0,SC4P=1,SC8P=0,SC16P=1,CLKO=0,OSCE=1,UM=0,SUP=0,SPE=0,SWR=0 */
+    RTC->CR |= RTC_CR_OSCE_MASK |RTC_CR_SC16P_MASK | RTC_CR_SC4P_MASK; 
+#endif
+
+    //Configure the TSR. default value: 1
+    RTC->TSR = 1;
+
+    // enable counter
+    RTC->SR |= RTC_SR_TCE_MASK;
+}
+
+void rtc_free(void) {
+    // [TODO]
+}
+
+/*
+ * Little check routine to see if the RTC has been enabled
+ * 0 = Disabled, 1 = Enabled
+ */
+int rtc_isenabled(void) {
+    // even if the RTC module is enabled,
+    // as we use RTC_CLKIN and an external clock,
+    // we need to reconfigure the pins. That is why we
+    // call init() if the rtc is enabled
+
+    // if RTC not enabled return 0
+    SIM->SCGC5 |= SIM_SCGC5_PORTC_MASK;
+    SIM->SCGC6 |= SIM_SCGC6_RTC_MASK;
+    if ((RTC->SR & RTC_SR_TCE_MASK) == 0)
+        return 0;
+
+    init();
+    return 1;
+}
+
+time_t rtc_read(void) {
+    return RTC->TSR;
+}
+
+void rtc_write(time_t t) {
+    // disable counter
+    RTC->SR &= ~RTC_SR_TCE_MASK;
+
+    // we do not write 0 into TSR
+    // to avoid invalid time
+    if (t == 0)
+        t = 1;
+
+    // write seconds
+    RTC->TSR = t;
+
+    // re-enable counter
+    RTC->SR |= RTC_SR_TCE_MASK;
+}