How to perform error checking?

[clayfreeman]

I was wondering if it were possible to detect the following:

1. If the SPI chip is wired and initialized correctly.
2. If SPIFlash::begin() was called and completed successfully.

I'm modifying a FAT library that uses this library as a backend and it would be useful to know whether the chip and class have been initialized appropriately before calling read/write operations.

[Marzogh]

You should be able to do this with the current v2.4.0-w.i.p branch. Call the *****.error() function after any other function call and it will return an 8-bit error code generated by that function. (Ref: Wiki page on error codes)

To check if the chip is initialized correctly I'd recommend calling it after begin(). The begin() function runs a chip ID subroutine which can determine if the chip initialises correctly. The simplest way to check for that would be to do something along the lines of this:

#include<SPIFlash.h>
#include<SPI.h>

void setup() {
    flash.begin();
    if (error()) {
        Serial.print("Error generated: ");
        Serial.println(error());
        break;
    }

    /* The rest of your code goes here */
}

void loop() {

    /* The rest of your code goes here */

}