While using the AK Board 0.5.1 11, I noticed that the SPI pin numbers are not fully defined as shown below. Could the relevant person in charge please provide the specific pin definitions for SPI0 and SPI1? I measured with a multimeter and found that SPI1 is located at the bottom right of the printed circuit board (AK Board), corresponding to pins "0, 1, 26, 27" on the Teensy. If I want to add an IMU, can I use this interface? In Board.h, the SPI definitions are as follows:
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//SPI Follower Pins
const unsigned int miso_pin ;
const unsigned int mosi_pin= 11;
const unsigned int sck_pin ;
const unsigned int cs_pin = 10;
const unsigned int irq_pin = 34;
const unsigned int rst_pin = 4;
const unsigned int spi_mode = 8; //This is 8 or 16 bit, not the actual SPI mode, I know it is confusing but that is how they chose to make the library.
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@KevinGuo
The SPI interface isn’t actively used for AK Board 0.5.1 II and later versions. We kept some of the pin definitions in the codebase and the breakout pins on the PCB for legacy purposes. The four pins you mentioned were originally reserved for the SPI interface. You’re free to use them for adding sensors. Just be sure to double-check the pin definitions to confirm these pins aren’t being used by other components, such as the angle sensor (pins A12 and A13).
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