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Altera_Forum
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19 years ago

Reading from an 8 Bit Component

Hi, I connected the Nios to an 8 bit custom component. When I read from a register which contains a 1 as the most significant bit, i.e. all values from 0x80 to 0xFF, the remaining 24 bits get f...
Altera_Forum's avatar
Altera_Forum
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19 years ago

Hi stic,

> For example reading the value 0x70 residing in one of the component's registers gives the

> value 0x00000070 to the variable I'm saving it to. But reading 0x80 gives the value 0xFFFFFF80.

If you're reading an 8-bit unsigned value, it's a good idea to store it as an 8-bit unsigned

variable ;-)

unsigned char foo = <<whatever>>

Regards,

--Scott