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theasus
Joined: 31 May 2009
Posts: 79
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| ADE7758 Library? |
 Posted: Sun May 31, 2009 1:04 pm |
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Hi,
Do you have the library of ADE7758? (Poly Phase Multifunction Energy Metering IC with Per Phase Information). I couldn't work with ADE7758. Can anyone help me about this problem? |
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dyeatman
Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK
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| Posted: Sun May 31, 2009 1:37 pm |
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One other user posted here a while back looking for a driver for this chip and got no answer so I would assume no one here has one. However, the chip appears to have a standard SPI interface so it shouldn't be hard to interface yourself if you have some experience with programming C on the PIC.
Here is some work 8051 on an driver in C that looks like it can be adapted pretty easily
http://www.8051projects.net/forum-t18372-post.html |
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theasus
Joined: 31 May 2009
Posts: 79
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| Posted: Mon Jun 01, 2009 11:46 am |
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| Actually I want to use PIC 16f877A with ADE7758. I don't know anything about 8051. If you have any source code about my problem please help me. |
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Markdem
Joined: 24 Jun 2005
Posts: 206
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| Posted: Wed Jun 03, 2009 5:47 am |
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I think I asked for the driver awhile back, could not find one, so I made one. Not very complete, but will get the data you probably need. If anyone can improve on it, please do. I would like to know what others think.
Driver
| Code: |
#define AD7758_CS PIN_A0
#define ADE_DOUT PIN_B7 //data to ADE
#define ADE_DIN PIN_B6 //data from ADE
#define ADE_CLK PIN_B5
//The following memory locations come from the ADE7758 datasheet
#define _IRMS 0x16
#define _VRMS 0x17
#define _PERIOD 0x27
#define _DIEREV 0x3F
int32 Read_ADE7753(ADE_COMMAND, len)
{
int i;
int data[4];
int32 RAW_VALUE;
output_low(AD7758_CS);
delay_us(1);
for(i=1;i<=8;++i)
{
output_high(ADE_CLK);
output_bit(ADE_DOUT, shift_left(&ADE_COMMAND,1,0));
delay_us(1);
output_low(ADE_CLK);
delay_us(1);
}
output_low(ADE_DOUT);
delay_us(6);
for(i=1;i<=8;++i)
{
output_high(ADE_CLK);
delay_us(1);
shift_left(&data[0],1,input(ADE_DIN));
output_low(ADE_CLK);
delay_us(1);
}
delay_ms(1);
for(i=1;i<=8;++i)
{
output_high(ADE_CLK);
delay_us(1);
shift_left(&data[1],1,input(ADE_DIN));
output_low(ADE_CLK);
delay_us(1);
}
delay_ms(1);
if(len > 16)
{
for(i=1;i<=8;++i)
{
output_high(ADE_CLK);
delay_us(1);
shift_left(&data[2],1,input(ADE_DIN));
output_low(ADE_CLK);
delay_us(1);
}
}
if(len > 16)
{
RAW_VALUE= make32(data[0],data[1],data[2]);
}
else
{
RAW_VALUE= make32(data[0],data[1]);
}
output_high(AD7758_CS);
return RAW_VALUE;
}
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example
| Code: |
#include <18F4550.h>
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN,NOBROWNOUT,NOMCLR
#use delay(clock=48000000)
#define VRMS_DIV 8718.50 //number to divide VRMS raw data to get volts (LSB\v)
#define IRMS_DIV 1550 //number to divide IRMS raw data to get mA
#define IRMS_OFFSET 2200 //PHY_I input offset to get 0 when no current flowing
#include "ADE7753.c"
#include "LCD420.c"
int i;
float VRMS_AVG, VRMS[10], VA;
int32 IRMS;
int32 value;
void main()
{
lcd_init();
printf(lcd_putc,"Ready");
output_high(AD7758_CS);
delay_ms(1000);
while(1)
{
for(i=0;i<=8;i++)
{
VRMS[i] = read_ADE7753(_VRMS) / VRMS_DIV;
delay_ms(100);
}
VRMS_AVG = (VRMS[0] + VRMS[1] + VRMS[2] + VRMS[3] + VRMS[4] + VRMS[5] + VRMS[6] + VRMS[7]) / 8;
value = read_ADE7753(_IRMS);
IRMS = (value - IRMS_OFFSET) / IRMS_DIV;
VA = VRMS_AVG * IRMS /100;
lcd_gotoxy(1,1);
printf(lcd_putc,"VRMS = %5.2g",VRMS_AVG);
lcd_gotoxy(1,2);
printf(lcd_putc,"IRMS = %04.2w",IRMS);
lcd_gotoxy(1,3);
printf(lcd_putc,"WATTS = %6.2g",VA);
delay_ms(2000);
}
}
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Tell me how you go.
Mark |
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aaronik19
Joined: 25 Apr 2011
Posts: 297
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| ade7758 220VAC connections |
| Posted: Mon Jun 06, 2011 2:26 pm |
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Dear All,
Can someone explain how I can interface the 220VAC to the ADE7758? On the datasheet there is 220VAC through 1Mohm resistor. That's it? The arrow of the other side is the neutral?
Really thanks for your kind help. |
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dyeatman
Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK
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| Posted: Mon Jun 06, 2011 3:00 pm |
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Essentially yes. Read page 3 of the below PDF, it will explain a lot...
datasheet.elcodis.com/pdf/13/3/130304/eval-ade7758eb.pdf
_________________
Google and Forum Search are some of your best tools!!!! |
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aaronik19
Joined: 25 Apr 2011
Posts: 297
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| AGND and DGND |
| Posted: Thu Jun 09, 2011 2:43 pm |
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| can I consider AGND and DGND the same? |
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