possible bug on chibios 3 I2C code

[trunet]

os/hal/ports/STM32/LLD/I2Cv1/i2c_lld.c line 800:

Code: Select all

#if defined(STM32F1XX_I2C)
  osalDbgCheck((rxbytes == 0) || ((rxbytes > 1) && (rxbuf != NULL)));
#endif

is this correct, or I can't transfer 1 byte from I2C?

[Giovanni]

Hi,

It is a bug in STM32F1 devices, you cannot transfer just one byte using DMA.

Giovanni

[aGuegu]

Took me hours to debug my code ....

[Giovanni]

If you are debugging then you should enable assertions, checks and state checker, those kind of things are found immediately.

Giovanni