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Altera_Forum's avatar
Altera_Forum
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16 years ago

Nios II IDE memory access error

What would be the first step to debug with this error message? /////////////////////////////////////////////////////////////////////////////////// Error! : Failed memory access in component cpu ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

as you wrote

# define ONCHIP_MEMORY_RAM_BASE 0x00010000

your on chip memory starts at 0x00010000 up to ? depending on the size you have entered in sopc builder

# define PIO_OUTPUT_BASE 0x00021010

# define PIO_INPUT_BASE 0x00021000

# define JTAG_UART_BASE 0x00021020

just have a look at all these addresses, there is none of them starting at 0x0, so there is no memory you could store data at 0x0 nor there is any input at 0x0 where you can get data from.