steven niu / Mbed 2 deprecated LP1768-lowpower_test

a test code to implement and test LP1768 power control mode

Dependencies:   mbed

This code implemented some LP1768 power mode : Sleep(), DeepSleep(), PowerDown(), DeepPowerDown(), BOGD_PowerDown(). It also has a test code to test these power modes and wakeup using watch dog. The wakeup part is based on Erik's code but add implementation for LP1768. As LP1768 has debug enabled in default, it cannot be waked up in DeepSleep mode. Therefore this code use WDC reset to wake up the chips from deep sleep. The test code also allow test the power under two clock frequency (96 MHz and 48MHz). Inspired by Paul and Michael Wang, I also tested the power reduction by power off PHY. The analysis could be found in http://mbed.org/users/steniu01/notebook/lp1768-power-mode-implementation-and-measurement-/#

main.cpp

Committer:
steniu01
Date:
2014-08-02
Revision:
2:15d9501bf5b3
Parent:
1:571258908570

File content as of revision 2:15d9501bf5b3:

#include "mbed.h"
#include "PowerControl.h"
#include "EthernetPowerControl.h"
#include "WakeUp.h"
#include "powercontrol.h"
#include "ClockControl/ClockControl.h"


DigitalOut myled1(LED1);
DigitalOut myled2(LED2) ;
DigitalOut myled3(LED3) ;

Timer t;



int main()
{
    //profiling_PHY_PowerDown();
    //PHY_PowerUp();// power up PHY because it was powerred up as default. We might power it down when test "Turn off PHY".
    
    myled1=1;
    wait(0.5);
    myled1=0;
    char char_get=0;
    int num_get=0;
    char* powermode[7]={ "[1] no low power", "[2] sleep mode", "[3] deep sleep mode", "[4] power down mode", "[5] Brown-out Reduced Power mode", "[6] Deep Power Down", "[7] Turn off PHY"};
    
    
    printf("Which frequency you want to run \r\n");
    printf("[1] 96MHz \r\n");
    printf("[2] 48MHz \r\n");
    char_get=getchar();
    num_get=char_get-48;
   
    
    switch (num_get){
        case 1: setSystemFrequency(0x3, 0x1, 12, 1);break;
        case 2: setSystemFrequency(0x3, 0x1, 12, 2);break;
        default: setSystemFrequency(0x3, 0x1, 12, 1);break;
    }
     Serial pc (USBTX, USBRX);
    pc.printf ("num_get is %d \r\n", num_get);
    wait (3);
    num_get=0;
    char_get=0;
    
    while (num_get>7 || num_get<1){
        pc.printf("Which power mode you want to choose: \r\n");
        for (int a=0;a<7;a++)
            pc.printf("%s \r\n", powermode[a]);
        char_get=pc.getc(); // get char from serial
        num_get=char_get-48;// convert char to int, minus 48 since ascii num start from 48
        if (num_get>7 || num_get<1)       
            pc.printf("You have choosen an invalid num, please choose a correct one\r\n");
    }      
    pc.printf ("I am going to test %s\r\n",powermode[num_get-1]);
    myled2=1;
    wait(0.5);
    myled2=0;
    WakeUp::set(10);
    //WakeUp::set(70);
    switch (num_get){
        case  1: break;
        case  2: steven_Sleep();break;
        case  3: steven_DeepSleep(); break;
        case  4: steven_PowerDown();break;
        case  5: steven_BOGD_PowerDown();break;
        case  6: steven_DeepPowerDown(); break;
        case  7: PHY_PowerDown(); break;
        default: pc.printf("Not valid input\n"); break;          
    }     
   while (1);
}