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IDLE btween messages in USART

Yood
Associate II

‎2019-03-21 01:19 AM

Hello,

I want to seperate my TX messages with an IDLE frame (all 1) in order to be able the sync to it​ on the RX side by getting an IDLE interrupt.

Is there an elegant way using the USART regs to verify that I send at least one IDLE before staring my next TX message?

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waclawek.jan
Guru

‎2019-03-21 01:52 AM

You did not tell us your STM32 model, but from UART chapter of RM0090:

Setting the TE bit drives the USART to send an idle frame before the first data frame.

JW

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