I'll do some more methodical testing to try to duplicate.
--
bkw
On 10/15/19 4:55 AM, Gary Hammond wrote:
With the code for sd2tpdd from GitHub, the compiler was issuing the
warnings below. I have gone through and corrected them and the
compiler is now happy and the randomness in the first 2 characters is
less random. They are still garbage characters but now they are nearly
consistently the same garbage for a given file.
For example, for 3 runs of the load/save of the same file, I got the
following first 2 bytes (hex)
5C 89
97 8A
5C 89
On a different file I got 1B 8A
The compiler warnings were:
184:33: warning: invalid conversion from 'char*' to 'byte* {aka
unsigned char*}' [-fpermissive]
92:6: note: initializing argument 1 of 'void clearBuffer(byte*, int)'
253:30: warning: ISO C++ forbids converting a string constant to
'char*' [-Wwrite-strings]
379:28: warning: ISO C++ forbids converting a string constant to
'char*' [-Wwrite-strings]
473:24: warning: ISO C++ forbids converting a string constant to
'char*' [-Wwrite-strings]
498:24: warning: ISO C++ forbids converting a string constant to
'char*' [-Wwrite-strings]
522:34: warning: ISO C++ forbids converting a string constant to
'char*' [-Wwrite-strings]
The NULL character is still being appended to the end of the file…no
luck so far chasing that one down.
To help with those who can confirm that they have their board working
fine, I am using Arduino 1.8.10 for build and upload.
The GitHub page for the source I am using is
https://github.com/TangentDelta/SD2TPDD in case I am using the wrong one.
I have now tried my 2 slightly suspect AliExpress Arduino Mega clones
and various combinations of el cheapo SD card readers and shop bought
ones. The genuine Arduino Mega I ordered from arduino.cc arrived today
so have swapped out the clones for the genuine article and still no luck.
