Questions tagged [loopback]

Connecting a full-duplex transceiver to itself to test its functionality, or otherwise making a local signal connection instead of one to another device. For feedback loops, use [feedback] or [control-loop] instead.

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votes
2answers
219 views

STM32 CAN bus Rx interrupt only triggers in loopback mode

I'm designing the CAN interface for a STM32F042C4T6 to be able to receive and send messages. I've tested my code and everything seems to work perfectly fine in loopback mode. However, when I hook up ...
3
votes
1answer
377 views

SPI Loopback value received is half of transmitted value

I am testing SPI of my PIC24E512GU814 microcontroller. In order to test, I connected MOSI to MISO. I wrote the following code for SPI initialization: ...
4
votes
1answer
625 views

SPI loopback with DMA

I am using STM32F4 discovery board and I am attempting to get SPI loopback with DMA. I have successfully got an "SPI-only" loopback running, but now I want use DMA in addition with the SPI, here are ...
5
votes
1answer
2k views

STM32 USART loopback

Is it possible to connect the Rx and Tx pins of the same USART or on two different USARTs on an STM32 discovery board to make a loopback and test the USART?
6
votes
2answers
2k views

Testing an FTDI chip

I have an FTDI chip (reference manual here) that translates USB from a PC to an SPI channel connected to an FPGA. I would like to test that the communication path between the PC and the FPGA is ...