Multi-digit word variable to string

[richard]

it could be the chip is not really i2c and behaves differently

try this, at least its a nicer transaction
i2cwrite SDA, SCL, addr,[7]
i2cread SDA, SCL, addr,[TEMP.lowbyte, TEMP.highbyte]



looking at the wiki link you posted, this would do exactly what the smbus timing diagram describes as a proceedure

PEC var byte
i2cread SDA, SCL,addr,reg,[temp.lowbyte,temp.highbyte,PEC] ' reg = $07 ;would be the normal pbp way

worth trying

[astanapane]

Hi Richard,

sure i'll try that, and i will try to figure out what is going on with a logic analyzer.

I have a saleae logic 8.

Will try that later today. Many thanks for your time once again.

[richard]

If there is only one MLX90614 sensor, the 7-bits address is 0x00 by default.

according to wiki addr =0 where did you get B4 from ?

[Ioannis]

If the chip is the MAX30102, on page 16 seems that reading needs first a write.

Ioannis

[astanapane]

If the chip is the MAX30102, on page 16 seems that reading needs first a write.

Ioannis

it is an IR MLX90614

[astanapane]

Applying the 0x00 is not working.

When i add back the B4 or B5 for write or read mode correspondingly, everything is in a working order again.

[richard]

Its hard to work with crappy information




i2cread SDA, SCL,$b4,7,[temp.lowbyte,temp.highbyte,PEC] will do exactly that


i just realized that what code you posted is in fact a snippet .
addr and reg are never defined , osc is unknown ,i2c defines unknown, pin settings and i2c pull ups ...........

could be another waste of time

[astanapane]

Richard,

i have thanked you so many times for your effort and help.

I think i have attached in the code most of the information required.

You have helped me in the first major issue i had with the right values and the command needed inside the HSEROUT.

Then we moved to I2C command. I think there i have shared the reg and addr values. For the SCL and SDA i dont think that is necessary at all to post which port is or not.

Anyway, now the code is working just fine and i need once again to thank you all for your help and time.

Once again Richard. Life is simpler and shorter than we all think. Smile because you have the knowledge in this field to help people.

[richard]

Its hard to work with crappy information
could be another waste of time

and it was

I had the
reg var Word
I think i've seen it as a comment somewhere here in the forum.

a classic case of monkey see monkey do programming error hidden away by use of snippets
days wasted, hundreds of posts to solve an elementary error.

i would not be surprised to find there is still one more major issue for the i2c settings still not addressed
for this precious secret code . i hope this is not a medical diagnostic device

[astanapane]

wait a sec,

im reading the manual again from the SENSOR

https://www.waveshare.com/w/upload/e/e4/MLX90614-EN.pdf