Hi Rob,
I tested the bus voltage, shunt_voltage and current functions, unfortunately it didn't work. So I looked at the lib and saw that the 3 lsb's shift were still present. The multiplication was also incorrect, the whole word value must be used. The 3 lsb's simply don't participate, so the multiply factor for the bus_voltage is 1 mV and for the shunt_voltage 5 uV, however, the resolution is then 8 mV and 40 uV respectively. Bits 15 to 3 contain the measured values. After the change, those functions worked properly. Btw Vasile the common mode I chose an inverting opamp in case of negative voltages and the ADC of the PIC. The current is measured by INA3221 on the common side. Kind regards, Bill. On Tuesday, August 19, 2025 at 6:34:16 AM UTC+2 vsurducan wrote: > Hi Rob, > Perhaps using float will limit de usability of the library in fast > processes or for small memory microcontroller size. > > Constant multiplication seems much faster assuring the precision you need. > It has the disadvantage of an external computation using cmul executable > and translation to jal code. ( btw, cmul.exe it should be included in the > jal package if it is not already). > > INA3221 seems to be very handy IC for energy measurement applications, > except perhaps the limited common mode voltage, this might be a valuable > library. > > best wishes, > Vasile > > > On Mon, Aug 18, 2025, 19:53 Rob CJ <[email protected]> wrote: > >> Hi Bill, >> >> I was looking at changing all values from float to word and dword but >> because of that you need to define the shunt restors in uOhm, the shunt >> value in uV, the current in uA and the bus value in V. This makes it - I >> think - less logical for the user. When using floats it is all logical >> everything in Ohm, Amper and Volt. >> >> So for know I kept the floats. >> >> Attached the full library and a sample program. I did not change the >> calulations you mentioned since I do not know what you changed. >> >> Can you give this version a try? >> >> Once I have the module I will test all functions and if OK add this >> library and a sample program to Jallib. >> >> Thanks. >> >> Kind regards, >> >> Rob >> >> ------------------------------ >> *Van:* [email protected] <[email protected]> namens Bill >> Beek <[email protected]> >> *Verzonden:* maandag 18 augustus 2025 15:42 >> *Aan:* jallib <[email protected]> >> *Onderwerp:* Re: [jallib] INA3221 board >> >> Hi Rob, >> I look forward to the final version, thank you for your effort. >> BTW the current function is not used, the calculation and calibrations >> of the real resistance I do in the main program. >> By max current and dividing by 0.1 you need a dword in the present >> function. >> I don't know how to handle the sign bit when there is negative current, I >> dont >> use it at the moment , others will do maybe. >> >> kind regards Bill. >> >> >> On Monday, August 18, 2025 at 1:00:08 PM UTC+2 Rob CJ wrote: >> >> Hi Bill, >> >> I agree with you not to use floats and do the calculation in the main >> program. Yesterday I completed the library with all functions. I will first >> remove the floats and include your fix and will then send you the update. I >> also ordered the module so I can test all functions. >> >> Met vriendelijke groet, >> Rob Jansen >> ------------------------------ >> *From:* [email protected] <[email protected]> on behalf of >> Bill Beek <[email protected]> >> *Sent:* Sunday, August 17, 2025 8:32:44 PM >> *To:* jallib <[email protected]> >> *Subject:* Re: [jallib] INA3221 board >> >> >> Hi Rob, I have the program working. >> >> When i looked at the registers it was very clear that I make some >> mistakes. >> >> I changed the last version of the lib again because the shifting of the 3 >> lsb's turned out to be incorrect and the multiplication in the voltages was >> also incorrect. >> >> The 3 LSBs do not participate, bit 4 is 8 mV, respectively 40 uV. >> >> So just read the registers in the main program. >> >> I no longer use a floating point for this, only word format. >> >> The calculations, and the display format are done in the main program. >> >> Finally, extending the lib would be nice, especially some configurations >> of the functions. >> >> The time out function is very useful. >> >> I'll leave it up to you whether you go along with my solution, see the >> changed library. >> >> kind regards, Bill. >> >> >> On Saturday, August 16, 2025 at 1:05:52 PM UTC+2 Rob CJ wrote: >> >> Hi Bill, >> >> I made a small mistake in the default IIC address 🙁. I fixed that. >> >> Some other remarks. I saw in a video that the Arduino Library you >> mentioned is not correct. I saw in your update that you corrected that. I >> saw the same fix in an Arduino Library from Adafruit. I also saw you added >> a function to read the register values which is handy. >> >> I added the changes to the attached library but I also added a timeout >> function. When the IIC communication is not working this function will >> return TRUE after you called it (after which it will be reset). I changed >> the call to the IIC routines so that it keep track of any timeout. I >> updated the samle program. >> >> Next to that I changed the array with shunt resistor values by floats and >> set them by defaul to 0.1 Ohm which seems to be the commonly used value and >> I saw that was also the case in your update. >> >> I think I will extend the library further and I am thinking of ordering a >> module to test. The library needs functions to change for example the shunt >> resistor value, etc. >> >> So see if you still get non-changing values and check the timeout and if >> so, change the IIC address. >> >> Kind regards, >> >> Rob >> >> >> >> ------------------------------ >> *Van:* [email protected] <[email protected]> namens Bill >> Beek <[email protected]> >> *Verzonden:* zaterdag 16 augustus 2025 12:18 >> >> *Aan:* jallib <[email protected]> >> *Onderwerp:* Re: [jallib] INA3221 board >> >> Hello Rob, >> >> I tested the program, but unfortunately, I didn't get good results. >> >> The current shows 1.6447997E1 with and without current. >> >> The voltage shows 8.223999E0 with and without voltage. >> >> So, nothing changes. >> >> I looked at the datasheet and the library and made some adjustments, also >> without success. >> >> I also tried reading the config, ID, and manufacturer registers, all of >> which returned 4040h. >> >> But I’m not sure if I dit that right. >> >> Here is my version with a litle typo. >> >> >> On Tuesday, August 12, 2025 at 8:33:39 PM UTC+2 Bill Beek wrote: >> >> Thank you Rob, >> I will look at it later, this week is very hot in the shack in my attic. >> >> thanks again, >> kind regards Bill. >> >> >> On Tuesday, August 12, 2025 at 8:16:54 PM UTC+2 Rob CJ wrote: >> >> Hi Bill, >> >> Small - but important - fix of the library. >> >> Use this version. >> >> Thanks >> >> Kind regards, >> >> Rob >> >> ------------------------------ >> *Van:* [email protected] <[email protected]> namens Rob CJ < >> [email protected]> >> *Verzonden:* dinsdag 12 augustus 2025 19:28 >> >> *Aan:* jallib <[email protected]> >> *Onderwerp:* Re: [jallib] INA3221 board >> Hi Bill, >> >> Attached my first attempt of the library for the INA3321. I only >> implemented the functions you called. >> >> I might add more functions later. >> >> You find the libary and a sample program for a PIC16F1825 so you may need >> to swich to a PIC that you normally use. I only compiled it since I could >> not test it. >> >> Can you give it a try. >> >> Thanks. >> >> Kind regards, >> >> Rob >> >> >> ------------------------------ >> *Van:* [email protected] <[email protected]> namens Bill >> Beek <[email protected]> >> *Verzonden:* zondag 10 augustus 2025 12:08 >> *Aan:* jallib <[email protected]> >> *Onderwerp:* Re: [jallib] INA3221 board >> >> >> Sorry Rob I can't get the text to be organized properly. >> >> I'll try again. >> >> Hi Rob, thank you for your quick response. >> >> Currently I have 1 INA3221 board left so I can still test. >> >> I now use the library of Rob Tillaart "INA3221_RT" >> >> #include "INA3221.h" >> >> INA3221 INA(0x40); >> >> And the commands for initialization and default setup. >> >> INA.begin(); >> >> ch = 0 to 2 >> >> U = INA.getBusVoltage(ch); >> >> I = INA.getCurrent_mA(ch); >> >> I hope this is enough info, >> >> Thank you very much for the effort. >> >> kind regards, Bill. >> >> >> On Sunday, August 10, 2025 at 11:45:44 AM UTC+2 Bill Beek wrote: >> >> Hi Rob, thank you for your quick response. >> Currently I have 1 INA3221 board left so I can still test. >> I now use the library of Rob Tillaart "INA3221_RT" >> #include "INA3221.h" INA3221 >> INA(0x40); >> And the commands for initialization and default setup. >> INA.begin(); >> ch = 0 to 2 >> U = INA.getBusVoltage(ch); >> I = INA.getCurrent_mA(ch); >> I hope this is enough info, >> Thank you very much for the effort. kind regards, Bill. >> >> >> On Saturday, August 9, 2025 at 8:05:05 PM UTC+2 Rob CJ wrote: >> >> Hi Bill, >> >> What I could do is only implement the functions you are using instead of >> porting all functions. That would save time. I do not have such a device >> so I cannot test it so if I have something you become the tester 🙂. >> >> Can you tell me which Arduino functions you use from this library? >> >> Kind regards, >> >> Rob >> >> >> >> ------------------------------ >> *Van:* [email protected] <[email protected]> namens Bill >> Beek <[email protected]> >> *Verzonden:* zaterdag 9 augustus 2025 19:49 >> *Aan:* jallib <[email protected]> >> *Onderwerp:* Re: [jallib] INA3221 board >> >> Hi Rob, >> TNX for your replay, >> I looked at it and found it too complicated to implement all the >> functions. By the way, I only use the Volt and Amp functions. So far I use >> an Arduino Nano and the INA3221 in a triple output power supply . But I >> like JAL much more. >> >> On Saturday, August 9, 2025 at 7:01:01 PM UTC+2 Rob CJ wrote: >> >> Hi Bill, >> >> Let's hope that somebody created something for JAL that can be turned >> into a JAL library. >> >> I had a quick look at the Arduino library and it seems to be a number of >> small but readable functions and 'only' about 500 lines of source code so >> it seems douable to make a JAL library out of it. How far did you get >> porting it? >> >> Kind regards, >> >> Rob >> >> >> >> ------------------------------ >> *Van:* [email protected] <[email protected]> namens Bill >> Beek <[email protected]> >> *Verzonden:* vrijdag 8 augustus 2025 20:21 >> *Aan:* jallib <[email protected]> >> *Onderwerp:* [jallib] INA3221 board >> >> Hi all, is there anyone who has made a library for the INA3221 >> Three-Channel Shunt Current and Supply Voltage Monitor module (I2C)? I've >> been looking at the arduino lib to convert it to a JAL lib, but it's a bit >> too complicated for me. 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ina3221_b.jal
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