Ver 3.1.3 SPI spi_tx_data -- 'SPITransfer' does not name a type; about serialtransfer

[PowerBroker2]

That part of the library is commented out because Arduino core developers are stupid and have different SPI APIs across different boards - making SPI data transfer libraries like this super difficult. Can post the entire error?

[AtherSaleem]

Thanks for Response:

Command: sendSize = myTransfer.txObj(testStruct, sendSize);
Error: sendSize = no matching function for call to 'SPITransfer::txObj(STRUCT&, uint16_t&)'

Command: sendSize = myTransfer.txObj(arr, sendSize);
Error: invalid conversion from 'char*' to 'int' [-fpermissive]

I am using ESP32 Dev Kit C

[PowerBroker2]

This error doesn't make sense considering the first argument for SPITransfer::txObj() is templated:

SerialTransfer/src/SPITransfer.h

Lines 27 to 49 in c596233

	uint16_t SPITransfer::txObj(const T &val, const uint16_t &index=0, const uint16_t &len=sizeof(T))
	Description:
	------------
	* Stuffs "len" number of bytes of an arbitrary object (byte, int,
	float, double, struct, etc...) into the transmit buffer (txBuff)
	starting at the index as specified by the argument "index"
	Inputs:
	-------
	* const T &val - Pointer to the object to be copied to the
	transmit buffer (txBuff)
	* const uint16_t &index - Starting index of the object within the
	transmit buffer (txBuff)
	* const uint16_t &len - Number of bytes of the object "val" to transmit
	Return:
	-------
	* uint16_t maxIndex - uint16_t maxIndex - Index of the transmit buffer (txBuff) that directly follows the bytes processed
	by the calling of this member function
	*//*
	template <typename T>
	uint16_t txObj(const T& val, const uint16_t& index = 0, const uint16_t& len = sizeof(T))
	{
	return packet.txObj(val, index, len);
	}

I honestly don't know what's going wrong - perhaps someone on the Arduino forum would be of more help

[AtherSaleem]

I just revisted .h and .cpp

There is some stuff like this:
Description:
------------
* Stuffs "len" number of bytes of an arbitrary object (byte, int,
float, double, struct, etc...) into the transmit buffer (txBuff)
starting at the index as specified by the argument "index"
Inputs:
-------

This seems to be Comment but not marked as comment.

This one:
*** const T &val - Pointer to the object to be copied to the**
Not sure what it is , declaration or Comment , may be this needs to be separated.

Had I been this expert to do myself, I would be developing libraries not using them , LoL