app: Add hardware RX byte counting overlay for ext MCU #90
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If NRF91 UART is used without hw-flow-control, the RX can lose data unless hardware RX byte counting is enabled for the UART. Add overlay for external MCU scenario, as there the customers are likely to run into this. Signed-off-by: Markus Lassila <[email protected]>
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Although I am not really looking forward to running into VCOM0 not being enabled for 91 products, when I am switching development areas, this might be our trigger to move from UART2 to UART0 and default pins.
The issue is also present if HWFC is not set for UART0 and using that would allow us to set the values in prj.conf.
Opinions are welcome.
SeppoTakalo
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SeppoTakalo
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The name overlay-external-mcu.conf is misleading.
I would propose the name overlay-uart2-no-hwfc.conf because that is when it is required.
The overlay-external-mcu.overlay defines HW flow control, so this new file is not a pair for that.
Similarly, there could be overlay-uart2-no-hwfc.overlay that includes the previous one and just disables the HWFC.
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If NRF91 UART is used without hw-flow-control, the RX can lose data unless hardware RX byte counting is enabled for the UART.
Add overlay for external MCU scenario, as there the customers are likely to run into this.