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Forum Index : Microcontroller and PC projects : MM+ BLIT READ / BLIT WRITE

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G.B.P.

Newbie

Joined: 13/08/2014
Location: Australia
Posts: 16

Posted: 09:34am 01 Sep 2021

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I am developing a short program where 6 small images (47x56 pixels) are read through BLIT READ from a larger preloaded full screen image on a ILI9341 display on the start up of the program and then randomly displayed again on the LCD using BLIT WRITE.
My problem is that after few runs, some of the images become corrupted, displaying only spotty squares.
The program is quite small and plenty of free memory is left open.

> memory
Flash:
4K (4%) Program (191 lines)
92K (96% Free

RAM:
1K ( 0%) 13 Variables
61K (62%) General
34K (38%) Free

I am also using PLAY SOUND during the program.

Is there any reason for this to happen?
Can someone give me any suggestion on how to resolve this issue?
Thank

G.B.P.

Newbie

Joined: 13/08/2014
Location: Australia
Posts: 16

Posted: 09:56am 01 Sep 2021

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... using PLAY WAV during the program.

When most of the sound commands removed, the problem appears to be gone..
The sound is taken from the PWM 2B pin.

Thanks

G.B.P.

Newbie

Joined: 13/08/2014
Location: Australia
Posts: 16

Posted: 10:14am 01 Sep 2021

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Never mind...

By resetting one sound at a time, I discovered that the pause used to allow one sound to fully play was too short and somehow affected the BLIT WRITE ...

Thanks

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