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Diffstat (limited to 'demos/modules/gadc/main.c')
| -rw-r--r-- | demos/modules/gadc/main.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/demos/modules/gadc/main.c b/demos/modules/gadc/main.c index 928635fa..7db14c82 100644 --- a/demos/modules/gadc/main.c +++ b/demos/modules/gadc/main.c @@ -167,6 +167,20 @@ int main(void) { gtimerStart(&lsTimer, LowSpeedTimer, ghText, TRUE, MY_LS_DELAY); #endif + /** + * Allocate buffers for the high speed GADC device - eg. 4 x 128 byte buffers. + * You may need to increase this for slower cpu's. + * You may be able to decrease this for low latency operating systems. + * 4 x 128 seems to work on the really slow Olimex SAM7EX256 board (display speed limitation) + * If your oscilloscope display stops but the low speed reading keep going then it is likely that + * your high speed timer has stalled due to running out of free buffers. Increase the number + * of buffers.. + * If you make the buffers too large with a slow sample rate you may not allow enough time for all + * the low speed items to occur in which case your memory will fill up with low speed requests until + * you run out of memory. + */ + gfxBufferAlloc(4, 128); + /* Set up the scope window in the top right on the screen */ { GWindowInit wi; |