I2C not working with STM32F103C6 and STM32F103C8

[RShiv.1]

we have been trying to get the I2C up on both the controller and no responses from anyone the cubeMx issue if I2C is really a problem..Kindly respond as we are trying to get I2C up ..

requesting the experience forum experts to respond.

Thanks

Ravi

[RShiv.1]

yes absoulutely...3V3 ..we are seeing high...4K7 pulls up ..

[RShiv.1]

Hi,

As I was continuing with my effort to read the sensor values using C8...I observed that when I do the HAL_write and HAL_Read...there seems to be values which are not coming out of sensor properly..

attached is the code for the same.I am seeing values like dd, dd once I read from the memory.

HAL_write is passing..I am comparing the same result with Rpi when I connect the sensor..so it is not matching with Rpi..Let me know your thoughts on this.

Thanks and regards

Ravi

[RShiv.1]

also would like to add..according to the sensor doc ...there is CRC start...so we need to add this??..

I also added the same but did not seem to make much difference

[RShiv.1]

when I do I2C_Mem_write it passes..but not I2C_Master_Transmit??...anyways I am not getting the intended answer in the buffer...thanks

[ONadr.1]

It's time to take the logic analyzer out of the drawer and look at the bus to see what's going on there.

[AScha.3]

yea, i said 3 days ago:

if still not working - its time, to look at the signal:

take DSO, 1 ch sck , 1 ch sda ; trigger on clk.

then show, what happens on I2C lines.

but he prefers to play blind cow . 🙂

[RShiv.1]

Hi,

sorry I had updated ...I2C is working fine...and I am also able to get the version of the sensor fine.

After which I am trying to read the status ready ..where I am not seeing the flag .

if I just enable version number all is fine..but when I try to get the get ready flag there seems to be problem...more to do with I2C_Mem_write and Mem_read...any suggestion with the way it is called kindly let me know.

Thanks

Ravi

[RShiv.1]

it looks more a pointer management issue I guess...I am able to get the version number of the sensor fine if I run only that..but when I enable get ready flag ...even the version number values changing..

let me know..

If I get this properly I will be able to read the perodic mesurement as well as the actual values from sensor...

[AScha.3]

try...

[RShiv.1]

Hi,

I tried with this which says

 

only dddd

but after start periodic measurement need to check for data ready??

anyways will try that also..not getting the values....let me know the change