Diff: targets/hal/TARGET_NXP/TARGET_LPC82X/sleep.c

Revision:

337:6ed01c00b962

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_NXP/TARGET_LPC82X/sleep.c	Mon Oct 06 10:00:08 2014 +0100
@@ -0,0 +1,62 @@
+/* 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"
+
+
+//#define DEEPSLEEP
+#define POWERDOWN
+
+void sleep(void)
+{
+    //Normal sleep mode for PCON:
+    LPC_PMU->PCON &= ~0x03;
+
+    //Normal sleep mode for ARM core:
+    SCB->SCR = 0;
+
+    //And go to sleep
+    __WFI();
+}
+
+// Deepsleep/powerdown modes assume the device is configured to use its internal RC oscillator directly
+ 
+void deepsleep(void)
+{
+    //Deep sleep in PCON
+    LPC_PMU->PCON &= ~0x03;
+
+#if defined(DEEPSLEEP)
+    LPC_PMU->PCON |= 0x01;
+#elif defined(POWERDOWN)
+    LPC_PMU->PCON |= 0x02;
+#endif
+
+    //If brownout detection and WDT are enabled, keep them enabled during sleep
+    LPC_SYSCON->PDSLEEPCFG = LPC_SYSCON->PDRUNCFG;
+
+    //After wakeup same stuff as currently enabled:
+    LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
+
+    //All interrupts may wake up:
+    LPC_SYSCON->STARTERP0 = 0xFF;
+    LPC_SYSCON->STARTERP1 = 0xFFFF;
+
+    //Deep sleep for ARM core:
+    SCB->SCR = 1<<2;
+
+    __WFI();
+}