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Reading out TLI4970 current sensor with XMC4500

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- Don't use Disable/EnableSlaveSelectSignal, it's not needed
- Make sure you only have one slave select signal configured in the app, it doesn't work if there's more than one configured
- Enable frame end mode and set word length and frame length to 16
- Set Leading/Trailing delay to 2

The TLI component samples from the hall sensor when Slave Select is pulled low and needs the leading delay so it can prepare the SPI message. And Slave Select needs to go high after every message, this is accomplished by frame end mode.

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