processing - Arduino multi-dimensional array crash -


i have block of code effect:

int piecex = 0; int piecey = 0;  int board[8][47] = {{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},                 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},                 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},                 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},                 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},                 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},                 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},                 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};  if (piecex > 0 && piecey < 46) {    /* if remove doesn't crash */   if (board[piecex-1][piecey] == 0 && board[piecex][piecey+1] == 0) {     piecex -= 1;   }   /*-----------------------------------*/ }

as far can tell, i'm initializing array correctly , i'm staying within index bounds. don't work processing or arduino, i'm hoping it's simple / obvious.

edit: hmm.. made minimalistic test version code, , doesn't crash. so, it's code not in example. damn. going try 0 in on lines. (my bad posting before isolating problem code.) while accurately describes problem, not reproduce it. strange bug.

edit 2: doesn't crash:

if (buttona == high) {   if (piecex > 0 && piecex < 8 && piecey > 0 && piecey < 46) {     if (board[0][0] == 0) {     }   } }

this doesn't crash:

if (buttona == high) {   if (piecex > 0 && piecex < 8 && piecey > 0 && piecey < 46) {     piecex -= 1;   } }

this crash:

if (buttona == high) {   if (piecex > 0 && piecex < 8 && piecey > 0 && piecey < 46) {     if (board[0][0] == 0) {       piecex -= 1;     }   } }

any idea what's going on? buttona never high, so.. code i'm tweaking shouldn't matter (it verifies , uploads fine.)

edit 3: crashes:

if (buttona == high) {   if (piecex > 0 && piecex < 8 && piecey > 0 && piecey < 46) {     if (board[0][0] == 0) {       piecex -= 1;     }   } }

this not:

if (0 == 1) {   if (piecex > 0 && piecex < 8 && piecey > 0 && piecey < 46) {     if (board[0][0] == 0) {       piecex -= 1;     }   } }

this crashes:

if (buttona == high) {   if (piecex > 0 && piecex < 8 && piecey > 0 && piecey < 46) {     if (board[0][0] == 0) {       piecex = 1;     }   } }

this not:

if (buttona == high) {   if (piecex > 0 && piecex < 8 && piecey > 0 && piecey < 46) {       piecex = 1;   } }

and not:

if (buttona == high) {   if (piecex > 0 && piecex < 8 && piecey > 0 && piecey < 46) {     if (board[0][0] == 0) {     }   } }

edit, here's full source code. i'm few hours black , white dr mario clone. never write in language, so.. potentially bit sloppy. more of random learning experiment in processing / video game hardware / arduino.

this looks running out of memory. 

int board[8][47]

consumes 752 bytes of memory. in addition 

tv.begin(ntsc,120,96);

will call

char tvout::begin(uint8_t mode, uint8_t x, uint8_t y) {      // check if x divisable 8     if ( !(x & 0xf8))             return 1;     x = x/8;      screen = (unsigned char*)malloc(x * y * sizeof(unsigned char));

which tries allocate 1440 bytes of memory. 1440 + 752 == 2192 > 2048 == sram size of arduino

so running out of memory.

can switch int board[8][47] int int8_t or uint8_t? reduce memory consumption of array 2. still tight on memory.


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