Suga koubou / Mbed 2 deprecated DeepSleep-m0

deep sleep and wake-up. GPIO group interrupt, start logic sample see: http://mbed.org/users/okini3939/notebook/low-power-m0/

Dependencies:   mbed

main.cpp@0:ae90ac40c518, 2012-10-15 (annotated)

Committer:
okini3939
Date:
Mon Oct 15 05:07:10 2012 +0000
Revision:
0:ae90ac40c518
Child:
1:d676ec86101e
1st build

;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okini3939 0:ae90ac40c518 1 #include "mbed.h"
okini3939 0:ae90ac40c518 2
okini3939 0:ae90ac40c518 3 DigitalOut myled(LED1);
okini3939 0:ae90ac40c518 4
okini3939 0:ae90ac40c518 5 Serial pc(p9, p10);
okini3939 0:ae90ac40c518 6
okini3939 0:ae90ac40c518 7 void initStartLogic (unsigned int p0, unsigned int p1) {
okini3939 0:ae90ac40c518 8 LPC_SYSCON->SYSAHBCLKCTRL |= (1<<24);
okini3939 0:ae90ac40c518 9 LPC_GPIO_GROUP_INT1->PORT_POL[0] = 0;
okini3939 0:ae90ac40c518 10 LPC_GPIO_GROUP_INT1->PORT_POL[1] = 0;
okini3939 0:ae90ac40c518 11 LPC_GPIO_GROUP_INT1->PORT_ENA[0] = p0;
okini3939 0:ae90ac40c518 12 LPC_GPIO_GROUP_INT1->PORT_ENA[1] = p1;
okini3939 0:ae90ac40c518 13 LPC_GPIO_GROUP_INT1->CTRL = 0; // Edge, OR, INT
okini3939 0:ae90ac40c518 14
okini3939 0:ae90ac40c518 15 LPC_SYSCON->PDAWAKECFG = LPC_SYSCON->PDRUNCFG;
okini3939 0:ae90ac40c518 16
okini3939 0:ae90ac40c518 17 LPC_SYSCON->STARTERP1 = (1<<21); // start logic GROUP1
okini3939 0:ae90ac40c518 18 NVIC_ClearPendingIRQ(GINT1_IRQn);
okini3939 0:ae90ac40c518 19 NVIC_EnableIRQ(GINT1_IRQn);
okini3939 0:ae90ac40c518 20 }
okini3939 0:ae90ac40c518 21
okini3939 0:ae90ac40c518 22 unsigned int setSystemMainClock(unsigned short S) {
okini3939 0:ae90ac40c518 23
okini3939 0:ae90ac40c518 24 if ((S & 0x03) == 3) {
okini3939 0:ae90ac40c518 25 LPC_SYSCON->PDRUNCFG &= ~(1 << 5); /* Power-up System Osc */
okini3939 0:ae90ac40c518 26 for (int i = 0; i < 200; i++) __NOP();
okini3939 0:ae90ac40c518 27 }
okini3939 0:ae90ac40c518 28
okini3939 0:ae90ac40c518 29 LPC_SYSCON->MAINCLKSEL = S; /* Select PLL Clock Output */
okini3939 0:ae90ac40c518 30 LPC_SYSCON->MAINCLKUEN = 0x01; /* Update MCLK Clock Source */
okini3939 0:ae90ac40c518 31 LPC_SYSCON->MAINCLKUEN = 0x00; /* Toggle Update Register */
okini3939 0:ae90ac40c518 32 LPC_SYSCON->MAINCLKUEN = 0x01;
okini3939 0:ae90ac40c518 33 while (!(LPC_SYSCON->MAINCLKUEN & 0x01)); /* Wait Until Updated */
okini3939 0:ae90ac40c518 34
okini3939 0:ae90ac40c518 35 if ((S & 0x03) == 0) {
okini3939 0:ae90ac40c518 36 LPC_SYSCON->PDRUNCFG |= (1 << 5); /* Power-down System Osc */
okini3939 0:ae90ac40c518 37 }
okini3939 0:ae90ac40c518 38
okini3939 0:ae90ac40c518 39 SystemCoreClockUpdate();
okini3939 0:ae90ac40c518 40 return SystemCoreClock;
okini3939 0:ae90ac40c518 41 }
okini3939 0:ae90ac40c518 42
okini3939 0:ae90ac40c518 43 unsigned int setSystemFrequency(unsigned short M, unsigned short P) {
okini3939 0:ae90ac40c518 44 LPC_SYSCON->SYSPLLCTRL = ((P & 0x03)<<5) | (M & 0x1f);
okini3939 0:ae90ac40c518 45 while (!(LPC_SYSCON->SYSPLLSTAT & 0x01)); // Wait Until PLL Locked
okini3939 0:ae90ac40c518 46 SystemCoreClockUpdate();
okini3939 0:ae90ac40c518 47 return SystemCoreClock;
okini3939 0:ae90ac40c518 48 }
okini3939 0:ae90ac40c518 49
okini3939 0:ae90ac40c518 50 void DeepSleep () {
okini3939 0:ae90ac40c518 51 SCB->SCR |= (1<<2);
okini3939 0:ae90ac40c518 52 __WFI();
okini3939 0:ae90ac40c518 53 }
okini3939 0:ae90ac40c518 54
okini3939 0:ae90ac40c518 55 void Sleep () {
okini3939 0:ae90ac40c518 56 __WFI();
okini3939 0:ae90ac40c518 57 }
okini3939 0:ae90ac40c518 58
okini3939 0:ae90ac40c518 59 extern "C"
okini3939 0:ae90ac40c518 60 void GINT1_IRQHandler(void) {
okini3939 0:ae90ac40c518 61 LPC_GPIO_GROUP_INT1->CTRL |= (1<<0);
okini3939 0:ae90ac40c518 62 NVIC_ClearPendingIRQ(GINT0_IRQn);
okini3939 0:ae90ac40c518 63 }
okini3939 0:ae90ac40c518 64
okini3939 0:ae90ac40c518 65 int main() {
okini3939 0:ae90ac40c518 66 int i;
okini3939 0:ae90ac40c518 67
okini3939 0:ae90ac40c518 68 // setSystemFrequency(3, 1); // M, P, 48MHz
okini3939 0:ae90ac40c518 69
okini3939 0:ae90ac40c518 70 pc.baud(9600);
okini3939 0:ae90ac40c518 71 pc.printf("low power\r\n");
okini3939 0:ae90ac40c518 72
okini3939 0:ae90ac40c518 73 for (i = 0; i < 6; i ++) {
okini3939 0:ae90ac40c518 74 myled = !myled;
okini3939 0:ae90ac40c518 75 wait(0.5);
okini3939 0:ae90ac40c518 76 }
okini3939 0:ae90ac40c518 77
okini3939 0:ae90ac40c518 78 initStartLogic((1<<8), 0);
okini3939 0:ae90ac40c518 79
okini3939 0:ae90ac40c518 80 loop:
okini3939 0:ae90ac40c518 81 pc.printf("enter sleep\r\n");
okini3939 0:ae90ac40c518 82 wait_ms(10);
okini3939 0:ae90ac40c518 83 setSystemMainClock(0);
okini3939 0:ae90ac40c518 84
okini3939 0:ae90ac40c518 85 DeepSleep();
okini3939 0:ae90ac40c518 86
okini3939 0:ae90ac40c518 87 setSystemMainClock(3);
okini3939 0:ae90ac40c518 88
okini3939 0:ae90ac40c518 89 pc.printf("wake up\r\n");
okini3939 0:ae90ac40c518 90 for (i = 0; i < 6; i ++) {
okini3939 0:ae90ac40c518 91 myled = !myled;
okini3939 0:ae90ac40c518 92 wait(0.5);
okini3939 0:ae90ac40c518 93 }
okini3939 0:ae90ac40c518 94
okini3939 0:ae90ac40c518 95 goto loop;
okini3939 0:ae90ac40c518 96
okini3939 0:ae90ac40c518 97 }