When flow control is used together with DMA, we need to add a pulldown
to CTS. Without it, it assumes flow control and gets stuck when
CTS is not connected.
Signed-off-by: Julian Oes <julian@oes.ch>
The defualt in NuttX is OSPEED of 50Mhz. This is realy a slew
rate control. At the default high slew rate the overshoot was
.7 Volts. On a ICM20649 this was causing the device to output
garbage. All 0s
N.B. A passive scope or Logic analyser's probes load will mask
the failure. Useed a FET probe to verify the issue.
Julian Oes