yoshi kuwae yoshi
/
DeepSleep-m0-wdt
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DeepSleep-m0-wdt
by 
Suga koubou
Revision 0:766ef51c9b11, committed 2014-07-08
- Comitter:
- okini3939
- Date:
- Tue Jul 08 05:57:10 2014 +0000
- Commit message:
- 1st build
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
diff -r 000000000000 -r 766ef51c9b11 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Jul 08 05:57:10 2014 +0000
@@ -0,0 +1,85 @@
+#include "mbed.h"
+
+DigitalOut led1(LED1), led2(LED2), led3(LED3), led4(LED4);
+
+Serial pc(USBTX, USBRX);
+
+extern "C"
+void WDT_IRQHandler(void) {
+ LPC_WWDT->MOD |= (1<<3);
+ LPC_WWDT->MOD &= ~(1<<2);
+ led2 = !led2;
+}
+
+void initWDT (float s) {
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1<<15);
+ LPC_SYSCON->PDRUNCFG &= ~(1<<6); // WDT on
+ LPC_SYSCON->PDSLEEPCFG &= ~(1<<6); // WDT on
+ LPC_SYSCON->WDTOSCCTRL = (1<<5)|(0x1f<<0); // 500kHz / 64
+
+ LPC_WWDT->CLKSEL = (1<<0); // Set CLK src to PCLK
+ uint32_t clk = 500000 / 64 / 4; // WD has a fixed /4 prescaler, PCLK default is /4
+ LPC_WWDT->TC = s * (float)clk;
+ LPC_WWDT->WARNINT = 0;
+ LPC_WWDT->MOD = (1<<0); // Enabled but Reset disable
+
+ LPC_WWDT->FEED = 0xAA;
+ LPC_WWDT->FEED = 0x55;
+
+ LPC_SYSCON->STARTERP1 |= (1<<12);
+ NVIC_ClearPendingIRQ(WDT_IRQn);
+ NVIC_EnableIRQ(WDT_IRQn);
+}
+
+void PowerDown () {
+ LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
+ LPC_PMU->PCON = (2<<0);
+ SCB->SCR |= (1<<2);
+ __WFI();
+}
+
+void DeepSleep () {
+ LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
+ LPC_PMU->PCON = (1<<0);
+ SCB->SCR |= (1<<2);
+ __WFI();
+}
+
+void Sleep () {
+ LPC_PMU->PCON = 0;
+ SCB->SCR &= ~(1<<2);
+ __WFI();
+}
+
+int main() {
+ int i;
+
+ pc.baud(9600);
+ pc.printf("low power\r\n");
+
+ for (i = 0; i < 6; i ++) {
+ led1 = !led1;
+ wait(0.2);
+ }
+
+ for (;;) {
+
+ pc.printf("enter sleep\r\n");
+ wait_ms(10);
+
+ initWDT(1);
+ wait_ms(10);
+// Sleep();
+ DeepSleep();
+// PowerDown();
+
+ pc.printf("wake up\r\n");
+ for (i = 0; i < 6; i ++) {
+ led1 = !led1;
+ wait(0.2);
+ }
+
+ for (;;);
+
+ }
+}
diff -r 000000000000 -r 766ef51c9b11 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Jul 08 05:57:10 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/04dd9b1680ae \ No newline at end of file