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CircuitCo / BeagleBone-Black

Design and Document files for the BeagleBone Black from BeagleBoard.org
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Beagle bone black uart0 pin detail in P8 and P9 headers #5

Open vinayashreeks opened 6 years ago

vinayashreeks commented 6 years ago

hi I am using beaglebone black ,but due to some reasons i am not able to use 6 pin header for serial debug.May i know which pins in p8 and p9 headers corresponds to uart0_tx and uart0_rx.please help me,i know other uarts pin details ,but only uart0 i need. @CircuitCo @hieuduong-cco @hieu-duong @beagleboneblack

mikini commented 6 years ago

Looking at p. 4 & 11 of BBB rev. C schematics of this very repository seems to suggest that UART0_RX and UART0_TX is only wired to the U15 74LVC2G241 buffer and subsequently the buffered rx/tx to the J1/P6 header (P6.4=RX, P6.5=TX, P6.1=GND). Ie. UART0 is not accessible at headers P8 or P9.

Though, pin multiplexing of the AM3558 might be able to shuffle them a bit it seems. This is probably a complex configuration exercise if your are only looking to debug.

Have you ensured proper grounding between the systems and connected rx to tx in the cable wiring?

vinayashreeks commented 6 years ago

@mikini thanks for the reply yes proper grounding is ensured. Then if i am using wilink8 cape on beaglebone black, it is not possible to get uart0 on top of cape??? that is on P8 and P9??