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Auhv · 2022-07-06

Using STM32F765VG6TR, every time I power on the MCU, the two DACs are supposed to be set to constant output voltages of 2.4V and 0.8V. This happens inconsistently - sometimes it works, about 50/50 success rate. A few notes:If it isn't working, an MCU...

Auhv · 2022-07-09

hdac is indeed modified during an interrupt as you suggested - TIM6_DAC_IRQHandler , which seems to handle DAC DMA underrun errors. I suppose the question is why the DAC sets the DMA underrun flag in the first place.

Auhv · 2022-07-08

No, it wasn't, so the question is why:DAC wouldn't enable because DACEN bit in RCC APB1 Enable Register wasn't setRCC DACEN bit isn't set because DAC is in the ERROR state at that sectionDAC goes from the RESET state to the ERROR state upon running t...

Auhv · 2022-07-07

Good call. It seems like __HAL_DAC_ENABLE is not setting the enable bit in the DAC control register?After __HAL_DAC_ENABLE when it doesn’t work:After __HAL_DAC_ENABLE when it works:This seems pretty strange - what would prevent memory from being chan...

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STM32F7 DACs enabling inconsistently upon powerup

Re: STM32F7 DACs enabling inconsistently upon powerup

Re: STM32F7 DACs enabling inconsistently upon powerup

Re: STM32F7 DACs enabling inconsistently upon powerup