Sidharth Mohla / Mbed 2 deprecated PowerControRTCFail

Made using MichaelWei's PowerControl library and RTC timer library. This fails to wake up for some unknown reason

Dependencies:   RTC mbed

Fork of PowerControl by Michael Wei

main.cpp@1:9ec2b510c2b1, 2018-02-14 (annotated)

Committer:
Pointer_reference
Date:
Wed Feb 14 08:53:47 2018 +0000
Revision:
1:9ec2b510c2b1
Parent:
0:9bd5f1bdb845 
This RTC interrupt fails for some unknown reason;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
no2chem 0:9bd5f1bdb845 1 #include "mbed.h"
Pointer_reference 1:9ec2b510c2b1 2 #include "RTC.h"
no2chem 0:9bd5f1bdb845 3 #include "PowerControl/PowerControl.h"
no2chem 0:9bd5f1bdb845 4 #include "PowerControl/EthernetPowerControl.h"
no2chem 0:9bd5f1bdb845 5
Pointer_reference 1:9ec2b510c2b1 6 #define USR_POWERDOWN (0x104)
Pointer_reference 1:9ec2b510c2b1 7 int semihost_powerdown() {
Pointer_reference 1:9ec2b510c2b1 8 uint32_t arg;
Pointer_reference 1:9ec2b510c2b1 9 return __semihost(USR_POWERDOWN, &arg);
Pointer_reference 1:9ec2b510c2b1 10 }
Pointer_reference 1:9ec2b510c2b1 11
Pointer_reference 1:9ec2b510c2b1 12
Pointer_reference 1:9ec2b510c2b1 13 DigitalOut myled1(LED1);
Pointer_reference 1:9ec2b510c2b1 14 DigitalOut myled2(LED2);
Pointer_reference 1:9ec2b510c2b1 15 DigitalOut myled3(LED3);
Pointer_reference 1:9ec2b510c2b1 16 DigitalOut myled4(LED4);
Pointer_reference 1:9ec2b510c2b1 17
Pointer_reference 1:9ec2b510c2b1 18 int volatile count;
Pointer_reference 1:9ec2b510c2b1 19
Pointer_reference 1:9ec2b510c2b1 20 // Simon's Watchdog code from
Pointer_reference 1:9ec2b510c2b1 21 // http://mbed.org/forum/mbed/topic/508/
Pointer_reference 1:9ec2b510c2b1 22 class Watchdog {
Pointer_reference 1:9ec2b510c2b1 23 public:
Pointer_reference 1:9ec2b510c2b1 24 // Load timeout value in watchdog timer and enable //Register descriptions in the manual
Pointer_reference 1:9ec2b510c2b1 25 void kick(float s) {
Pointer_reference 1:9ec2b510c2b1 26 LPC_WDT->WDCLKSEL = 0x02; // Set CLK src to RTC for DeepSleep wakeup; RTC runs on 32kHz
Pointer_reference 1:9ec2b510c2b1 27 LPC_WDT->WDTC = (s/4.0)*32768; // Timeout value in 32bit register in terms of RTC ticks
Pointer_reference 1:9ec2b510c2b1 28 LPC_WDT->WDMOD = 0x3; // Enabled register(0) and Reset register(1)
Pointer_reference 1:9ec2b510c2b1 29 kick();
Pointer_reference 1:9ec2b510c2b1 30 }
Pointer_reference 1:9ec2b510c2b1 31 // "kick" or "feed" the dog - reset the watchdog timer
Pointer_reference 1:9ec2b510c2b1 32 // by writing this required bit pattern. If wrong sequence is used, a RESET is triggeered
Pointer_reference 1:9ec2b510c2b1 33 void kick() {
Pointer_reference 1:9ec2b510c2b1 34 LPC_WDT->WDFEED = 0xAA;
Pointer_reference 1:9ec2b510c2b1 35 LPC_WDT->WDFEED = 0x55;
Pointer_reference 1:9ec2b510c2b1 36 }
Pointer_reference 1:9ec2b510c2b1 37 };
Pointer_reference 1:9ec2b510c2b1 38
Pointer_reference 1:9ec2b510c2b1 39 // Setup the watchdog timer
Pointer_reference 1:9ec2b510c2b1 40 Watchdog wdt;
Pointer_reference 1:9ec2b510c2b1 41
Pointer_reference 1:9ec2b510c2b1 42 // Blink LED
Pointer_reference 1:9ec2b510c2b1 43 void blink() {
Pointer_reference 1:9ec2b510c2b1 44 myled4 = 0;
Pointer_reference 1:9ec2b510c2b1 45 myled1 = 1;
Pointer_reference 1:9ec2b510c2b1 46 }
Pointer_reference 1:9ec2b510c2b1 47 Serial pc(USBTX, USBRX);
no2chem 0:9bd5f1bdb845 48 int main() {
Pointer_reference 1:9ec2b510c2b1 49 set_time(1256729737);
Pointer_reference 1:9ec2b510c2b1 50 //RTC::attach(&blink, RTC::Second);
Pointer_reference 1:9ec2b510c2b1 51 //Serial pc(USBTX, USBRX);
Pointer_reference 1:9ec2b510c2b1 52 int result;
Pointer_reference 1:9ec2b510c2b1 53 //Watchdog wdt;
Pointer_reference 1:9ec2b510c2b1 54 //pc.printf("Hello World!\n");
Pointer_reference 1:9ec2b510c2b1 55
Pointer_reference 1:9ec2b510c2b1 56 // On reset, determine if a watchdog, power on reset or a pushbutton caused reset and display on LED 4 or 3
Pointer_reference 1:9ec2b510c2b1 57 // Check reset source register
Pointer_reference 1:9ec2b510c2b1 58 result = LPC_SC->RSID;
Pointer_reference 1:9ec2b510c2b1 59 if ((result & 0x03 )==0) {
Pointer_reference 1:9ec2b510c2b1 60 // was not POR or reset pushbutton so
Pointer_reference 1:9ec2b510c2b1 61 // Mbed is out of debug mode and reset so can enter DeepSleep now and wakeup using watchdog
Pointer_reference 1:9ec2b510c2b1 62 //myled4 = 1;
Pointer_reference 1:9ec2b510c2b1 63 wait(.0625);
Pointer_reference 1:9ec2b510c2b1 64 //wdt.kick(2);
Pointer_reference 1:9ec2b510c2b1 65 //blink();
Pointer_reference 1:9ec2b510c2b1 66 tm t = RTC::getDefaultTM();
Pointer_reference 1:9ec2b510c2b1 67 t.tm_sec = 5;
Pointer_reference 1:9ec2b510c2b1 68 RTC::alarm(&blink, t);
Pointer_reference 1:9ec2b510c2b1 69 DeepSleep();
Pointer_reference 1:9ec2b510c2b1 70
Pointer_reference 1:9ec2b510c2b1 71 myled4 = 0;
Pointer_reference 1:9ec2b510c2b1 72 // Watch dog timer wakes it up with a reset
Pointer_reference 1:9ec2b510c2b1 73 //
Pointer_reference 1:9ec2b510c2b1 74 } else {
Pointer_reference 1:9ec2b510c2b1 75 // Was an initial manual or Power on Reset
Pointer_reference 1:9ec2b510c2b1 76 // This codes only executes the first time after initial POR or button reset
Pointer_reference 1:9ec2b510c2b1 77 LPC_SC->RSID = 0x0F;
Pointer_reference 1:9ec2b510c2b1 78 // Clear reset source register bits for next reset
Pointer_reference 1:9ec2b510c2b1 79 myled3 = 1;
Pointer_reference 1:9ec2b510c2b1 80 // LED3 on to indicate initial reset at full power level
Pointer_reference 1:9ec2b510c2b1 81 // Normal mbed power level for this setup is around 690mW
Pointer_reference 1:9ec2b510c2b1 82 // assuming 5V used on Vin pin
Pointer_reference 1:9ec2b510c2b1 83 // Power down Ethernet interface - saves around 175mW -no cable as well
Pointer_reference 1:9ec2b510c2b1 84 PHY_PowerDown();
Pointer_reference 1:9ec2b510c2b1 85 // Power down magic USB interface chip - saves around 150mW
Pointer_reference 1:9ec2b510c2b1 86 // Needs new firmware (URL below) and Power need to be supplied from Vin pin not USB
Pointer_reference 1:9ec2b510c2b1 87 // http://mbed.org/handbook/Beta
Pointer_reference 1:9ec2b510c2b1 88
Pointer_reference 1:9ec2b510c2b1 89 // Also exits debug mode - must not be in debug mode for deep power down modes (Board limitation)
Pointer_reference 1:9ec2b510c2b1 90 result = semihost_powerdown();
Pointer_reference 1:9ec2b510c2b1 91
Pointer_reference 1:9ec2b510c2b1 92 // Power consumption is now around half
Pointer_reference 1:9ec2b510c2b1 93 // Turn off clock enables on unused I/O Peripherals (UARTs, Timers, PWM, SPI, CAN, I2C, A/D...)
Pointer_reference 1:9ec2b510c2b1 94 // To save just a tiny bit more power - most are already off by default in this short code example
Pointer_reference 1:9ec2b510c2b1 95 // See PowerControl.h for I/O device bit assignments
Pointer_reference 1:9ec2b510c2b1 96 // Don't turn off GPIO - it is needed to blink the LEDs
Pointer_reference 1:9ec2b510c2b1 97 Peripheral_PowerDown(0xFFFF7FFF);
Pointer_reference 1:9ec2b510c2b1 98 // Now can do a reset to free mbed of debug mode
Pointer_reference 1:9ec2b510c2b1 99 // NXP manual says must exit debug mode and reset for DeepSleep or lower power levels to wakeup
Pointer_reference 1:9ec2b510c2b1 100 wait(1);
Pointer_reference 1:9ec2b510c2b1 101 NVIC_SystemReset();
Pointer_reference 1:9ec2b510c2b1 102 }
no2chem 0:9bd5f1bdb845 103 }