Norimasa Okamoto
Deep power-down mode example program.
LPC810のDeep power-downモードのテストプログラム。
LEDが消灯している時間はDeep power-downモードで作っています。
Warning
Deep power-downモードではリセットピンによるリセットは効きません。
フラッシュ書き込みにはISPモード(nISP=L)でパワーオンリセットして下さい。
Revision 0:843a94215f82, committed 2014-07-10
- Comitter:
- va009039
- Date:
- Thu Jul 10 04:26:53 2014 +0000
- Child:
- 1:de1ba63f90b8
- Commit message:
- first commit
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DeepPowerDown.h Thu Jul 10 04:26:53 2014 +0000
@@ -0,0 +1,49 @@
+#pragma once
+
+class DeepPowerDown {
+public:
+ static void wakeupTimer(uint32_t delay_sec) {
+ wakeupTimer_ms(delay_sec * 1000);
+ }
+
+ static void wakeupTimer_ms(uint32_t delay_ms) {
+ LPC_PMU->DPDCTRL |= (1<<2)|(1<<3); // enable low-power oscillator
+ LPC_SYSCON->SYSAHBCLKCTRL |= 1<<9;
+ LPC_WKT->CTRL = 0x03; // low power clock(10kHz)
+ LPC_WKT->COUNT = delay_ms * (10000/1000);
+ }
+
+ static void wakeupPin(bool enable) {
+ if (enable) {
+ LPC_PMU->DPDCTRL &= ~(1<<1);
+ } else {
+ LPC_PMU->DPDCTRL |= (1<<1);
+ }
+ }
+
+ static void setData0(uint32_t data) { LPC_PMU->GPREG0 = data; }
+ static void setData1(uint32_t data) { LPC_PMU->GPREG1 = data; }
+ static void setData2(uint32_t data) { LPC_PMU->GPREG2 = data; }
+ static void setData3(uint32_t data) { LPC_PMU->GPREG3 = data; }
+
+ static uint32_t getData0() { return LPC_PMU->GPREG0; }
+ static uint32_t getData1() { return LPC_PMU->GPREG1; }
+ static uint32_t getData2() { return LPC_PMU->GPREG2; }
+ static uint32_t getData3() { return LPC_PMU->GPREG3; }
+
+ static void entry() {
+ LPC_PMU->PCON = 0x03|(1<<3); // Deep power-down mode setting
+ SCB->SCR = 1<<2; // Deep sleep for ARM core
+ __WFI();
+ /* NOTREACHED */
+ }
+
+ static bool is_entry() {
+ return (LPC_PMU->PCON & (1<<11)) ? true : false;
+ }
+
+ static void clear() {
+ LPC_PMU->PCON &= ~(1<<11); // clear DPDFLAG
+ }
+};
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lpc810.s Thu Jul 10 04:26:53 2014 +0000 @@ -0,0 +1,22 @@ +;patch for lpc810 +; + PRESERVE8 + THUMB + + AREA |.text|, CODE, READONLY + +Reset_Handler PROC + EXPORT Reset_Handler + IMPORT SystemInit + IMPORT __main + LDR R0, =0x10000400 + MOV SP,R0 + LDR R0, =SystemInit + BLX R0 + LDR R0, =__main+4 + BX R0 + ENDP + + ALIGN + + END
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Jul 10 04:26:53 2014 +0000
@@ -0,0 +1,34 @@
+#include "mbed.h"
+#include "DeepPowerDown.h"
+
+// LPC810 pinout
+#define dp1 P0_5 // nRESET
+#define dp2 P0_4 // WAKEUP
+#define dp3 // SWCLK
+#define dp4 // SWDIO
+#define dp5 P0_1 // nISP
+#define dp6 // VIN
+#define dp7 // GND
+#define dp8 P0_0
+
+DigitalOut led1(dp5);
+
+int main()
+{
+ led1 = 1;
+ wait_ms(3);
+ led1 = 0;
+
+ int ms = 500;
+ int cnt = DeepPowerDown::getData0();
+ if (++cnt >= 3) {
+ cnt = 0;
+ ms = 3*1000;
+ }
+ DeepPowerDown::setData0(cnt);
+ DeepPowerDown::wakeupTimer_ms(ms);
+ DeepPowerDown::wakeupPin(false);
+ DeepPowerDown::entry();
+ /* NOTREACHED */
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Jul 10 04:26:53 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/04dd9b1680ae \ No newline at end of file