STM32L073 missing RCC defines for CRC
Posted: Thu Jan 22, 2026 10:37 am
Hello all !
developing on the STM32L073RZ (on the nucleo board), I've activated the CRC driver of ChibiOS-Contrib. This raised that the rcc macros for CRC are not available. Looking at the Reference Manual of the STM32L0x3, page 123 confirms the existence of a compatible CRC peripheral and page 205 the availability (and necessity) of the configuration bit for RCC.
All [font=Courier New]stm32l0xxxx.h[/font] files have the [font=Courier New]RCC_AHBENR_CRCEN[/font] defines already properly set, only the macros seem to be missing in [font=Courier New]os/hal/ports/STM32/STM32L0xx/stm32_rcc.h[/font]. I've added the necessary lines and the CRC driver now works properly. I think the change should be integrated into the offical codebase :
Request for Comments
Kind regards,
Theo
developing on the STM32L073RZ (on the nucleo board), I've activated the CRC driver of ChibiOS-Contrib. This raised that the rcc macros for CRC are not available. Looking at the Reference Manual of the STM32L0x3, page 123 confirms the existence of a compatible CRC peripheral and page 205 the availability (and necessity) of the configuration bit for RCC.
All [font=Courier New]stm32l0xxxx.h[/font] files have the [font=Courier New]RCC_AHBENR_CRCEN[/font] defines already properly set, only the macros seem to be missing in [font=Courier New]os/hal/ports/STM32/STM32L0xx/stm32_rcc.h[/font]. I've added the necessary lines and the CRC driver now works properly. I think the change should be integrated into the offical codebase :
Code: Select all
/**
* @name CRC peripherals specific RCC operations
* @{
*/
/**
* @brief Enables the CRC peripheral clock.
*
* @param[in] lp low power enable flag
*
* @api
*/
#define rccEnableCRC(lp) rccEnableAHB(RCC_AHBENR_CRCEN, lp)
/**
* @brief Disables the CRC peripheral clock.
*
* @api
*/
#define rccDisableCRC() rccDisableAHB(RCC_AHBENR_CRCEN)
/**
* @brief Resets the CRC peripheral.
*
* @api
*/
#define rccResetCRC() rccResetAHB(RCC_AHBRSTR_CRCRST)
/** @} */
Request for Comments
Kind regards,
Theo