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start RX DMA

start TX DMA

------------------------------------ Constructor ------------------------------------//

SPI receive a char

SPI send a char

Checks to see if page overflow is permitted and assists with determining next address to read/write. Sets the global address variable

Checks to see if page overflow is permitted and assists with determining next address to read/write. Sets the global address variable

Initiates SPI operation - but data is not transferred yet. Always call _prep() before this function (especially when it involves writing or reading to

Initiates SPI operation - but data is not transferred yet. Always call _prep() before this function (especially when it involves writing or reading to

Identifies the chip

Identifies the chip

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~// Private functions used by read, write and erase operations // ~~~~~~~~~~~~~

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~// Private functions used by read, write and erase operations // ~~~~~~~~~~~~~

Checks to see if 4-byte addressing is already disabled and if not, disables it

Disable DMA Channel

Enable DMA Channel

Poll for transfer complete

Constructor DMASAM::DMASAM(){} ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~// Private functions used by Arduino Due DMA operat

Enable DMA Controller.

Checks to see if 4-byte addressing is already enabled and if not, enables it

Stops all operations. Should be called after all the required data is read/written from repeated _nextByte() calls

Stops all operations. Should be called after all the required data is read/written from repeated _nextByte() calls

Checks for presence of chip by requesting JEDEC ID

Checks for presence of chip by requesting JEDEC ID

Checks the device ID to establish storage parameters

This function returns a custom length of data from the SFDP table requested as an array of 8 bit integers (bytes)

Reads and stores any required values from the Basic Flash Parameter table

Gets IO timing information from SFDP tables - if available.

This function returns the SFDP table requested as an array of 32 bit integers

bitNumber can be between 0 to 31

byteNumber can be between 1 to 256

dWordNumber can be between 1 to 256

startByte is the byte from which the 16-bit integer starts and can be between 1 to 256

Checks to see if chip is powered down. If it is, retrns true. If not, returns false.

Checks to see if chip is powered down. If it is, retrns true. If not, returns false.

Reads/Writes next data buffer. Should be called after _beginSPI()

Reads/Writes next data buffer. Should be called after _beginSPI()

Reads/Writes next byte. Call 'n' times to read/write 'n' number of bytes. Should be called after _beginSPI()

Reads/Writes next byte. Call 'n' times to read/write 'n' number of bytes. Should be called after _beginSPI()

Reads/Writes next int. Call 'n' times to read/write 'n' number of integers. Should be called after _beginSPI()

Reads/Writes next int. Call 'n' times to read/write 'n' number of integers. Should be called after _beginSPI()

Checks the erase/program suspend flag before enabling/disabling a program/erase suspend operation

Polls the status register 1 until busy flag is cleared or timeout

Checks to see if the block of memory has been previously written to (unless OVERWRITE is enabled)

Checks to see if the block of memory has been previously written to

Double checks all parameters before calling a read or write. Comes in two variants Takes address and returns the address if true, else returns false.

Double checks all parameters before calling a read or write. Comes in two variants Takes address and returns the address if true, else returns false.

Subfunctions for troubleshooting function

Checks if status register 1 can be accessed - used to check chip status, during powerdown and power up and for debugging

Checks if status register 1 can be accessed - used to check chip status, during powerdown and power up and for debugging

Checks if status register 2 can be accessed, if yes, reads and returns it

Checks if status register 3 can be accessed, if yes, reads and returns it

Transfer Address.

Transfer Address.

Troubleshooting function. Called when #ifdef RUNDIAGNOSTIC is uncommented at the top of this file.