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- U-Boot console UART selection:
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- The U-Boot port for this congatec board currently supports two different
- configurations (defconfig files). The only difference is the UART that
- is used as the U-Boot console UART. The default defconfig file:
- conga-qeval20-qa3-e3845_defconfig
- provides this console on the UART0 which is provided via a Winbond
- Super-IO chip connected on the congatec Qseven 2.0 evaluation carrier
- board (conga-QEVAL). This UART is the one provided with a SubD9
- connector on the mainboard (the low one). The 2nd defconfig file:
- conga-qeval20-qa3-e3845-internal-uart_defconfig
- provides the U-Boot console on the BayTrail internal legacy UART,
- which is routed from the QSeven SoM to the X300 connector on the
- baseboard. Here is called COM2. The baseboard already provides the
- RS232 level shifters. So a TTL-USB UART adapter does not work in
- this case. The signals need to get connected directly to the
- RS232 level signals of the PC UART via some adapter cable.
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