Hello,
I am using SPI with crc enabled on stm32f429ig.
The problem is: if master's SCK's gpio speed is configured as medium, everything works fine. BUT if it is set to veryhigh, transmitted crc (read from TXCRCR register) always calculates a wrong value.
For example, when sending 0x01 using CRC-8 with a Polynomial = 0x07, the result in the TXCRCR register is always 0x09. However, RXCRCR in the slave side(also on a stm32f429ig with same configuration) calculates the right result of 0x07. This also occurs with CRC-16.
I am wondering how SCK gpio speed or potential circuit problems leads to the wrong crc calculation?
