power.c

Analog 公司 ADE7169 SOC 电表方案DEMO程序

/*
-02/22/2006: Petre M.
  -this file contains functions used to manage the power supply of ADE7169Fxx
*/

#include "ioADE7169F16.h"
#include "extern_declarations.h"
#include "EEPROM_locations.h"


//this routine initializes the SFRs correspondent to power management
void Setup_Power(void) {

  //clear eventual flags in IPSMF
  IPSMF = 0x00;

  //set BATPR only when the part is supplied from VDD
  if (PERIPH_bit.VSWSOURCE) {
    /*000000=reserved
            00=battery switchover enabled on Low VDD only
    */
    BATPR = 0x00;
  }
  //background battery measurements are enabled every 1 minute
  BATVTH = Battery_Low;//we need to introduce here a real threshold!!!!
  STRBPER=STRBPER | 0x0c;

  //bit2=0, i.e.no external reference connected to REFIN pin
  //bit1,0=01=RX pin enabled with wake-up disabled
  //      When UART communication is developed, these bits must be set!!!
  //Until then, set these pins as GPIO!!!
  PERIPH = (PERIPH & 0xF8)|Bit0;

  /*0=no PSM interrupt when VSW passes from VBAT to VDD because this is something
      PSM1 and PSM2 modes have to deal with
     x=do not care about this bit here
      0=no PSM interrupt for SAG event
       0=reserved
        0=no PSM interrupt for VSW related events
         0=disable PSM interrupt for VBAT monitoring
          0=no PSM interrupt when VSW switches from VDD to VBAT
           0=disable PSM interrupt for VDCIN<1.2V
  */
  IPSME = IPSME & 0x40;
//disable PSM interrupt in IEIP2
  IEIP2_bit.EPSM = 0;

  return;
}

//If a backup command has been received, then the state of the energy meter is stored
//into the EEPROM. We want to execute it only one time, so we use Bit0 of
//Command_Status[0] to manage this.
void Backup_State(void) {

  //if a command to execute a backup has been given because VDCIN<1.2V
  if (IPSMF_bit.FVDC) {
    IPSMF_bit.FVDC = 0;
      if (!(Command_Status[0]&Bit0)) {
      //disable Alarm RTC interrupt otherwise the processor would
      //be awoken every 0.5sec and at this point (VDD falling), we don't need anymore
      //to execute Low Priority Tasks
      TIMECON_bit.ITEN = 0;

      //erase an eventual ALARM based command
      //clear ALARM flag
      TIMECON_bit.ALARM = 0;

      //disable Energy Metering Interrupt
      IEIP2_bit.EADE = 0;

      //store the energies in EEPROM
      Active_Energy_write();

      //we read this byte to ensure the write process ends before the processor enters in sleep mode
      Tx_CTRL_byte(Nr_Bytes_1, EEPROM_Fault_Days,&Fault_Days);

      //wait until the backup has finished to switch on to the battery
      /*000000=reserved
              01=battery switchover enabled on Low VDD and VDCIN<1.2V
      */
      BATPR = 0x01;

      Blink_LCD(Blink_250mHz);//LCD is set to blink at 0.25Hz frequency (BLKFREQ=3)

      Set_flag(Bit0, &Command_Status[0]);

      //refresh watchdog here because the Alarm interrupt has been
      //disabled and it can be that the watchdog is not anymore refreshed
      Refresh_Watchdog();//this function prevents watchdog from timeout
    }
  }

  return;
}

//this functions blinks the baterry icon of the LCD if VBAT<BATVTH with the frequency
//determined by the frequency of ALARM RTC interrupts (currently at 0.5sec period)
//The blink option of the LCD module cannot be used because we want to
//blink only the battery icon, not the entire LCD
void Battery_Alarm(void) {
  char a;

  //if IPSMF_bit.FBAT is 1 and BATTADC<BATVTH, then blink the battery LCD icon
  if (IPSMF_bit.FBAT) {
    //clear the flag
    IPSMF_bit.FBAT=0;

    a = BATADC;
    if (a<Battery_Low) {
      //Bit2 of LCD_buffer[4] is toggled with a period equal to ALARM RTC period
#ifdef GOWORLD_LCD
      LCD_buffer[4] = LCD_buffer[4] ^ Bit2;
#endif
#ifdef OCULAR_LCD
      LCD_buffer[8] = LCD_buffer[8] ^ Bit7;
#endif

      //set a new threshold BATVTH=0xff
      BATVTH = 0xff;
     }
    //if VBAT becomes greater than a value Battery_Low2, then stop blinking.
    //Battery_Low2 != Battery_Low in order to obtain a hysteresis
    //in triggering various modes
    if (a>Battery_Low2) {
      //clear the battery LCD icon
#ifdef GOWORLD_LCD
      LCD_buffer[4] = LCD_buffer[4] & NBit2;
#endif
#ifdef OCULAR_LCD
      LCD_buffer[8] = LCD_buffer[8] & NBit7;
#endif
      //set a new threshold BATVTH=Battery_Low
      BATVTH = Battery_Low;
    }
  }
  return;
}

//this function executes some tasks that must be
//done before entering Deep Sleep Mode PSM2
void Prepare_for_Sleep(void) {

  //copy LCD_command_ptr into Scratch1 register
  //It is necessary to account for measurement visualizations
  SCRATCH3 = Meter_Errors[0];
  SCRATCH4 = LCD_Command[0];


  return;
}

//this function reads SCRATCH SFRs and various data from
//EEPROM when the processor is awoken from PSM2
void Init_variables_PSM1(void) {

  Meter_Errors[0] = SCRATCH3;
  LCD_Command[0] = SCRATCH4;

  return;
}