12/24/2023 0 Comments Use sercom spi arduino zeroThe variant.h and the variant.cpp use the values defined in WVariant.h there's a description array called PinDescription g_APinDescription in variant.cpp that contains all the control values for all pins. Values for the bigger SAMD21J (I'm sure they're working on some kind of Arduino Zero Mega) are already defined, and my version also contains the ones for the smaller D21 E. The WVariant.h is the file that defines all the bits that you have to put in the control registers of the SAMD1 in order to configure all the functions described in Chapter 6 of the Datasheet I suppose you already have a copy of the datasheet but here's the link anyway, just in case: You can find the base stuff inside variant.h, variant.cpp under your variant folder, and under WVariant.h in the core folder. He actually asked me what happened to pins: EraseBlockSize to map addresses to blocks.īlockDevice is the raw device that is meant to store flash data.Albert from avdweb is working on a SAM D21 board, and he wrote me an email asking me for some help he acknoweldged that the Arduino Zero has way less broken out pins on the three headers than the SAM D21 G actually has, but he does not know how to use them on his board that has all the pins broken out, and he also cannot find where those are defined in the variant files. The start and len parameters are in block numbers, use transparently coalesce ranges of blocks into larger bundles if the chip A typical size is 4096.ĮraseBlockSize() int64 // EraseBlocks erases the given number of blocks. It must be a power of two, and may be as small as 1. This is used for the block size in EraseBlocks. WriteBlockSize() int64 // EraseBlockSize returns the smallest erasable area on this particular chip It can be used by a client to optimize writes, non-aligned writes Size() int64 // WriteBlockSize returns the block size in which data can be written to WriterAt // Size returns the number of bytes in this block device. ReaderAt // WriteAt writes the given number of bytes to the block device. ReadAt reads the given number of bytes from the block device. PB31 Pin = 63 // peripherals: TCC0 channel 1, TCC1 channel 3 PB17 Pin = 49 // peripherals: TCC0 channel 1 PB14 Pin = 46 PB15 Pin = 47 PB16 Pin = 48 // peripherals: TCC0 channel 0 PB13 Pin = 45 // peripherals: TCC0 channel 3 PB12 Pin = 44 // peripherals: TCC0 channel 2 PB11 Pin = 43 // peripherals: TCC0 channel 1 PA31 Pin = 31 // peripherals: TCC1 channel 1 PA26 Pin = 26 PA27 Pin = 27 PA28 Pin = 28 PA29 Pin = 29 PA30 Pin = 30 // peripherals: TCC1 channel 0 PA25 Pin = 25 // peripherals: TCC1 channel 3 PA24 Pin = 24 // peripherals: TCC1 channel 2 PA23 Pin = 23 // peripherals: TCC0 channel 1 PA22 Pin = 22 // peripherals: TCC0 channel 0 PA21 Pin = 21 // peripherals: TCC0 channel 3 PA20 Pin = 20 // peripherals: TCC0 channel 2 PA19 Pin = 19 // peripherals: TCC0 channel 3 PA18 Pin = 18 // peripherals: TCC0 channel 2 PA17 Pin = 17 // peripherals: TCC2 channel 1, TCC0 channel 3 PA16 Pin = 16 // peripherals: TCC2 channel 0, TCC0 channel 2 PA15 Pin = 15 // peripherals: TCC0 channel 1 PA14 Pin = 14 // peripherals: TCC0 channel 0 PA13 Pin = 13 // peripherals: TCC2 channel 1, TCC0 channel 3 PA12 Pin = 12 // peripherals: TCC2 channel 0, TCC0 channel 2 PA11 Pin = 11 // peripherals: TCC1 channel 1, TCC0 channel 3 PA10 Pin = 10 // peripherals: TCC1 channel 0, TCC0 channel 2 PA09 Pin = 9 // peripherals: TCC0 channel 1, TCC1 channel 3 PA08 Pin = 8 // peripherals: TCC0 channel 0, TCC1 channel 2 PA07 Pin = 7 // peripherals: TCC1 channel 1 PA06 Pin = 6 // peripherals: TCC1 channel 0 PA05 Pin = 5 // peripherals: TCC0 channel 1 PA02 Pin = 2 PA03 Pin = 3 PA04 Pin = 4 // peripherals: TCC0 channel 0 PA01 Pin = 1 // peripherals: TCC2 channel 1 PA00 Pin = 0 // peripherals: TCC2 channel 0
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