Andy A
Minimal version of mBuino Sleep
This is a cut down version of mBuino_Sleep that doesn't control any IO lines.
This version should work fine on any NXP LPC11Uxx CPUs although you will need to check the external pin pullup/down status, any conflicts between external and internal pulls will increase power usage.
If using this version on an mBuino ensure you disable the pullup on P0_3 (on by default for any unconfigured GPIO lines) and turn all the LEDs off before entering sleep. Failing to do so will increase the sleep mode power draw.
See mBuino_Sleep for usage details.
Revision 1:219e1147c6fa, committed 2014-09-22
- Comitter:
- AndyA
- Date:
- Mon Sep 22 09:15:52 2014 +0000
- Parent:
- 0:af76f9a302ea
- Child:
- 2:9c5cd0f7aa8a
- Commit message:
- Added DeepPowerDown
Changed in this revision
| mBuinoSleep.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mBuinoSleep.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/mBuinoSleep.cpp Sun Sep 21 11:02:19 2014 +0000
+++ b/mBuinoSleep.cpp Mon Sep 22 09:15:52 2014 +0000
@@ -2,6 +2,10 @@
void mBuinoSleep(enum sleepMode_t mode)
{
+
+ if ((mode == DeepPowerDown) && (LPC_PMU->PCON & 0x08)) // bit 3 high blocks deep power down.
+ mode = PowerDown;
+
switch (mode) {
default:
case Sleep:
@@ -47,5 +51,10 @@
LPC_SYSCON->PDRUNCFG |= 0x01; // power down the IRC if it was off before
}
break;
+ case DeepPowerDown:
+ LPC_PMU->PCON = 0x3;
+ LPC_SYSCON->PDSLEEPCFG |= 0x7f; // shut off everything we can.
+ SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
+ __WFI();
}
}
--- a/mBuinoSleep.h Sun Sep 21 11:02:19 2014 +0000
+++ b/mBuinoSleep.h Mon Sep 22 09:15:52 2014 +0000
@@ -3,7 +3,7 @@
#include "mbed.h"
-enum sleepMode_t {Sleep, DeepSleep, PowerDown}; //, DeepPowerDown
+enum sleepMode_t {Sleep, DeepSleep, PowerDown, DeepPowerDown};
void mBuinoSleep(enum sleepMode_t mode);