STM32_CECSW enforces HSI or LSE enabled even if not used
Posted: Thu Aug 06, 2015 11:12 pm
Hi,
if I use a mcuconf.h similar to this (excerpt):
ChibiOS 3.x (HAL: current SVN) prints this error:
Neither do I use CEC nor does my STM32F030x support it at all. The only options for CECSW are STM32_CECSW_HSI and STM32_CECSW_LSE, therefore either HSI oder LSE would have to be enabled which might not be the case for a low-power application.
What is the recommended method of disabling CEC so neither of those clocks need to be active?
Ad hoc, I could think of using
but I think it is not advisable to do that because it might get ORed into some register we don't want to modify.
Best regards, Uli
if I use a mcuconf.h similar to this (excerpt):
Code: Select all
#define STM32_HSI_ENABLED FALSE
#define STM32_HSE_ENABLED TRUE
#define STM32_LSE_ENABLED FALSE
#define STM32_CECSW STM32_CECSW_HSI
ChibiOS 3.x (HAL: current SVN) prints this error:
Code: Select all
#error "HSI not enabled, required by STM32_CECSW"
Neither do I use CEC nor does my STM32F030x support it at all. The only options for CECSW are STM32_CECSW_HSI and STM32_CECSW_LSE, therefore either HSI oder LSE would have to be enabled which might not be the case for a low-power application.
What is the recommended method of disabling CEC so neither of those clocks need to be active?
Ad hoc, I could think of using
Code: Select all
#define STM32_CECSW 0xFF //Neither STM32_CECSW_HSI nor STM32_CECSW_LSE
but I think it is not advisable to do that because it might get ORed into some register we don't want to modify.
Best regards, Uli