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Altera_Forum
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14 years ago

DE2-70 adv7180

Hello. I can not initialize the adv7180 adc over i2c - no akcnowledgement returns when i write its address. The "reset" is tied to '1', also tried to follow datasheet (5ms reset -> program) it does n...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

IOWR_8DIRECT(I2C_BASE,OC_I2C_TXR,0x80);		//write slave address+write bit
IOWR_8DIRECT(I2C_BASE,OC_I2C_CR,0x90);			//set STA, set WR

The address is (according to de2 manual) 0x40. One bit shift to the left + write bit = 0x80. Also, when i register the isr, the first interrupt occures because of arbitration lost it might mean something or simply core bug i don't know.