Diff: targets/TARGET_NXP/TARGET_LPC11XX_11CXX/sleep.c

Revision:

0:f269e3021894

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NXP/TARGET_LPC11XX_11CXX/sleep.c	Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,49 @@
+/* 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 "sleep_api.h"
+#include "cmsis.h"
+#include "mbed_interface.h"
+
+void sleep(void) {
+    
+    // PCON[DPDEN] set to sleep
+    LPC_PMU->PCON = 0x0;
+    
+    // SRC[SLEEPDEEP] set to 0 = sleep
+    SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
+    
+    // wait for interrupt
+    __WFI();
+}
+
+void deepsleep(void) {
+    
+    // PCON[DPDEN] set to deepsleep
+    LPC_PMU->PCON = 0;
+    
+    // SRC[SLEEPDEEP] set to 1 = deep sleep
+    SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
+    
+    //According to user manual it is kinda picky about reserved bits, so we follow that nicely
+    //Keep WDOSC and BOD in same state as they are now during deepsleep
+    LPC_SYSCON->PDSLEEPCFG = 0x000018B7 | (LPC_SYSCON->PDRUNCFG & (PDRUNCFG_WDTOSC_PD | PDRUNCFG_BOD_PD)); 
+    
+    // Power up same as before powerdown
+    LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
+    
+    // wait for interrupt
+    __WFI();
+}