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I need 8051 C code for SED1530 LCD driver

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SED1530 LCD driver

hi
I need a 8051 c code(k**eil) for driving graphic LCD LM4900BG33G100SNY from Densitron.
It uses SED1530 epson lcd driver IC.
I used a c code that is attached to this topic ,but It does not operate properly.For example the contrast of LCD can not be changed and it is near dark.
when I write data to LCD RAM a meaningless data will be seen at display!

The code have nod busy flag check ,I placed a long delay between each write data or command.But It does not work!
please help me.
 

Hi, I am not sure but most of all LCD contrast needs negative voltage to drive LCD pannels. Check their negative voltage again. It will be drive dc-dc converter.
 

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