2020-03-05 6:26 AM
configured in cube MX. PB6 / PB7 in I2C at 50K
i added 4,6K pullup at 3,3V
i try to connect ADS1115 (work's in other board)
the driver HAL return BUSY.
in scope,no have edge down.
wait flag reset...
have you an idea?
thanks
2020-03-05 1:44 PM
Try to bit-bang the I2C.
JW
2020-03-06 1:23 AM
i have in project a strange thing,the projet empty with I2C works...
if i just change APB2 Prescaler 1 to 16 (for my projet) I2C1 don't work.
i don't understand because I2C1 is on APB1 in datasheet..
i tested this one hundred times.
do you have an explanation?
thnaks
2020-03-06 5:45 AM
when i use APB2 Prescaler /16 I2C don't work, at the beginning i think is when APB2 clock is next to 0MHz but in fact is when i you APB2 PRescaler /16. register CFG is correctly, no change of APB1 PRescaler.
2020-03-07 3:21 AM
Interesting, and I have no idea what may be wrong.
GPIOs and AFIO are on APB2 in the 'F1 - can't this be related somehow? Read back and check the related GPIO and AFIO registers.
Have you tried different APB2 prescalers?
What happens if you set *both* APB1 and APB2 prescaler to the same value?
Isn't there anything related in the errata?
I don't use the 'F1.
