Mark Bundgus
During Deep power-down mode, the contents of the SRAM and registers are not retained except for a small amount of data which can be stored in five 32-bit general purpose registers of the power management unit block. All functional pins are tri-stated in Deep power-down mode except for the WAKEUP pin.
Diff: DeepPowerDown.cpp
- Revision:
- 0:959f4e23f133
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DeepPowerDown.cpp Sat Jan 03 17:22:30 2015 +0000
@@ -0,0 +1,90 @@
+/*
+ * DeepPowerDown.cpp
+ *
+ * Created on: Dec 26, 2014
+ * Author: bundgus
+ */
+
+#include "DeepPowerDown.h"
+#include "LPC11xx.h"
+
+DeepPowerDown::DeepPowerDown() {
+ // TODO Auto-generated constructor stub
+
+}
+
+DeepPowerDown::~DeepPowerDown() {
+ // TODO Auto-generated destructor stub
+}
+
+
+void DeepPowerDown::powerDown(){
+
+ /*
+ * Table 49.
+ Register overview: PMU (base address 0x4003 8000)
+
+ Name Access Address offset Description Reset value
+ PCON R/W 0x000 Power control register 0x0
+ GPREG0 R/W 0x004 General purpose register 0 0x0
+ GPREG1 R/W 0x008 General purpose register 1 0x0
+ GPREG2 R/W 0x00C General purpose register 2 0x0
+ GPREG3 R/W 0x010 General purpose register 3 0x0
+ GPREG4 R/W 0x014 General purpose register 4 0x0
+ */
+
+
+ // Write one to the DPDEN bit in the PCON register.
+ LPC_PMU->PCON = (1 << 1) | (1 << 11);
+
+ // Write one to the SLEEPDEEP bit in the ARM Cortex-M0 SCR register.
+
+ SCB->SCR |= (1 << 2); //Set SLEEPDEEP bit
+
+ // Ensure that the IRC is powered by setting bits IRCOUT_PD and IRC_PD to zero in the PDRUNCFG register before entering Deep power-down mode.
+ LPC_SYSCON->PDRUNCFG &= ~((1 << 0) | (1 << 1));
+
+ // Deep Power Down
+ __WFI();
+
+}
+
+void DeepPowerDown::setGPREG0(unsigned int newregval){
+ LPC_PMU->GPREG0 = newregval;
+}
+
+unsigned int DeepPowerDown::getGPREG0(){
+ return LPC_PMU->GPREG0;
+}
+
+void DeepPowerDown::setGPREG1(unsigned int newregval){
+ LPC_PMU->GPREG1 = newregval;
+}
+
+unsigned int DeepPowerDown::getGPREG1(){
+ return LPC_PMU->GPREG1;
+}
+
+void DeepPowerDown::setGPREG2(unsigned int newregval){
+ LPC_PMU->GPREG2 = newregval;
+}
+
+unsigned int DeepPowerDown::getGPREG2(){
+ return LPC_PMU->GPREG2;
+}
+
+void DeepPowerDown::setGPREG3(unsigned int newregval){
+ LPC_PMU->GPREG3 = newregval;
+}
+
+unsigned int DeepPowerDown::getGPREG3(){
+ return LPC_PMU->GPREG3;
+}
+
+void DeepPowerDown::setGPREG4(unsigned int newregval){
+ LPC_PMU->GPREG4 = newregval;
+}
+
+unsigned int DeepPowerDown::getGPREG4(){
+ return LPC_PMU->GPREG4;
+}