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Linux/LP5562: Issue of load LED pattern to engine

Part Number: LP5562

Tool/software: Linux

Hi

I used the LP5562 for RGBW LED driver. I can control it by I2C PWM mode. But I cannot load the pattern to the SRAM.

I read back the SRAM. It's all "0x00", don't know why., I have set the OP_mode to load program as datasheet described.

I have followed the example of datasheet to load pattern, but after I read the SRAM from 0x10~0x19, it's all zero and the enable register for engine1~3 are all "00b" (hold) state even I change it to "10b".

Could someone help me to figure out what's the cause for it? Thanks a lot.

BR, Jerry