how do i find the names of individual bits in registers

[deep_rune]

where can i find the names of individual bits inside each register? i like to be able to use these to go

thing -> register |= 1<<name;

but although i know the header file that contains the register names, i can't find the names of the bits within the registers

[TDK]

Consult the reference manual.

The header files also include macros such as TIM_CR1_CEN for the CEN bit within the CR1 register.

[deep_rune]

do you mean that they are the same names as in the reference manual?

[deep_rune]

if i use

I2C2 ->CR2 |= 1<<START; 

START being the name of the bit listed in the ref manual, it doesn't work

[TDK]

Yes. Go check it out.

[deep_rune]

where in the ref manual? the names given in the register descriptions dont work

[Tesla DeLorean]

Guessing theprune is using the L4

https://www.st.com/resource/en/reference_manual/dm00151940-stm32l41xxx42xxx43xxx44xxx45xxx46xxx-advanced-armbased-32bit-mcus-stmicroelectronics.pdf

Exact naming will be in the CMSIS Include file, gives bit positions, etc. Might have subtly different names, or prefix/suffix to keep the namespaces unique

Repository\STM32Cube_FW_L4_V1.14.0\Drivers\CMSIS\Device\ST\STM32L4xx\Include\stm32l432xx.h

#define DAC_CR_DMAEN2_Pos      (28U)

#define DAC_CR_DMAEN2_Msk      (0x1UL << DAC_CR_DMAEN2_Pos)        /*!< 0x10000000 */

#define DAC_CR_DMAEN2        DAC_CR_DMAEN2_Msk             /*!<DAC channel2 DMA enabled */

#define DAC_CR_DMAUDRIE2_Pos    (29U)

#define DAC_CR_DMAUDRIE2_Msk    (0x1UL << DAC_CR_DMAUDRIE2_Pos)      /*!< 0x20000000 */

#define DAC_CR_DMAUDRIE2      DAC_CR_DMAUDRIE2_Msk            /*!<DAC channel2 DMA underrun interrupt enable >*/

#define DAC_CR_CEN2_Pos       (30U)

#define DAC_CR_CEN2_Msk       (0x1UL << DAC_CR_CEN2_Pos)         /*!< 0x40000000 */

#define DAC_CR_CEN2         DAC_CR_CEN2_Msk              /*!<DAC channel2 calibration enable >*/