G431 SPI - bits are not set.

[Tobe]

First time i set up SPI, not using HAL.

In the debug, i see that not a single bit is set.

What am i doing wrong?

 

 SPI_HandleTypeDef spiHandle;

 spiHandle.Instance = SPI2;

 // SPI_CR1_CPOL
 SET_BIT(spiHandle.Instance->CR1, SPI_BAUDRATEPRESCALER_256);

 // CPOL = 0
 SET_BIT(spiHandle.Instance->CR1, SPI_POLARITY_LOW);

 // CPHA = 1
 SET_BIT(spiHandle.Instance->CR1, SPI_PHASE_2EDGE);

 // MSB is default

 // We are Master
 SET_BIT(spiHandle.Instance->CR1, SPI_MODE_MASTER);

 // Active SPI
 SET_BIT(spiHandle.Instance->CR1, SPI_CR1_SPE);

 // Frame length
 SET_BIT(spiHandle.Instance->CR2, SPI_CR2_DS_2 | SPI_CR2_DS_1 | SPI_CR2_DS_0);


 // SS output
 SET_BIT(spiHandle.Instance->CR2, SPI_CR2_SSOE );

 

[AScha.3]

>What am i doing wrong?

Not using HAL ? Why ?

Just for fun ?

Look in HAL lib, how its doing this, then you know.

 

[Tobe]

I rather like to read it in the manual, but i must have missed it? I followed the procedure in it.

Also there a so many places where it the solution would be.

I could set up the uart easily.

[AScha.3]

G4xx SPI is not so complex :

Maybe easy way: setup with Cube, then just write to DR ( SPI2->DR ) , as i do, to send.  :)

(But i have no G4xx , just F303, etc. SPI seem same. On H7 or H5 its another game ! )