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Bug in STM32L0 HAL TIM / reference manual flaw

Question asked by karsten on Apr 1, 2015
The reference manual in section 21.3.3 to choose the clock for a timer says the following:
External clock mode2: external trigger input (ETR connected internally to LSE)

But the following description is not sufficient to count LSE cycles, the ETR_RMP field of the TIMx_OR register also needs to be set to 11, and this is only mentioned in the register description.


Furthermore this is not implemented properly in the HAL, stm32l0xx_hal_tim_ex.h
#define TIM22_ETR_LSE                     ((uint32_t)0xFFFC0000)

It needs to be
#define TIM22_ETR_LSE                     ((uint32_t)0xFFFC0003)


I did not check the rest of those values.

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