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Filling5681 · 2024-09-02

I have a sensor (SPI slave) that follows this process:Master sends configurationMaster sends start commandEvery millisecond (or according to configuration):The slave signals that data is ready by pulling a pin lowThe master pulls CS lowThe master sen...

Filling5681 · 2023-12-02

Hey folks,I've fabricated a little PCB to glue an LSM9DS1 to an ESP32-S3. As far as I can see, the ESP32 is sending the correct signals but the LSM9DS1 isn't returning anything useful. Here's what I get when I try to read 0x0F, the WHOAMI register, f...

Filling5681 · 2024-09-03

It's dirty but I think I figured out a hack: of the 11-byte payload that I get from the SPI device, I only actually care about 4 of those bytes. That just barely fits into a "single", as the DMA describes it, which allows me to hack towards what I ne...

Filling5681 · 2023-12-05

@Federica Bossi Unfortunately I only have a 4-channel oscilloscope so I can't show you everything at once. I can tell you that both CS pins seem to work fine when working indepdendently. They're definitely not connected to the same pins or anything ...

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STM32U5 LPDMA with SPI and circular buffer

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Re: STM32U5 LPDMA with SPI and circular buffer

Re: LSM9DS1 SDO always 0