Hey all,
I have a few questions about the SPI protocol & pins specifically on the Teensy. I've read through the SPI page on the site a few times, as well as other guides, but there are some things I still don't quite grasp.
First off, the SPI page mentions that there are specific SPI pins, and that if you can't use those pins, you must use the alternate pins specified in that page (14, 7, 8). However, on the Teensy pinouts they show pins labeled as MOSI/MISO1, MOSI/MISO2, SCK1/SCK2. In the past I've seen this for UART (Tx1, Tx2, Rx1, Rx2) which meant you could connect multiple devices through UART. This seems to stand in contrast to what I'm gathering from the SPI page where it seems only the main SPI pins (13, 11, 12) or the alternates (14, 7, 8) can be used, rather than simply having two SPI devices connected.
My second question is kind of a continuation of the first. In the SPI page, it mentions that some of the SPI Pins are used by the Audio Adapter, and therefore that would be a situation where you'd want to move them to their alternate positions. However, from the pinout of the audio adapter board, it still shows the alternate pins 7 & 14 would still be used by the audio adapter board. It would seem to me that switching the SPI pins to the alternate positions would still mess with the audio adapter.
Any clarification or insight is greatly appreciated!
I have a few questions about the SPI protocol & pins specifically on the Teensy. I've read through the SPI page on the site a few times, as well as other guides, but there are some things I still don't quite grasp.
First off, the SPI page mentions that there are specific SPI pins, and that if you can't use those pins, you must use the alternate pins specified in that page (14, 7, 8). However, on the Teensy pinouts they show pins labeled as MOSI/MISO1, MOSI/MISO2, SCK1/SCK2. In the past I've seen this for UART (Tx1, Tx2, Rx1, Rx2) which meant you could connect multiple devices through UART. This seems to stand in contrast to what I'm gathering from the SPI page where it seems only the main SPI pins (13, 11, 12) or the alternates (14, 7, 8) can be used, rather than simply having two SPI devices connected.
My second question is kind of a continuation of the first. In the SPI page, it mentions that some of the SPI Pins are used by the Audio Adapter, and therefore that would be a situation where you'd want to move them to their alternate positions. However, from the pinout of the audio adapter board, it still shows the alternate pins 7 & 14 would still be used by the audio adapter board. It would seem to me that switching the SPI pins to the alternate positions would still mess with the audio adapter.
Any clarification or insight is greatly appreciated!