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Altera_Forum's avatar
Altera_Forum
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11 years ago

battery backup sram

Hi I'm working on Cyclon4Gx FPGA Project and I have a problem with the battery backup ram. Every time I reset the software the memory is always erased. In the past I worked on a similar cyclo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

The battery is ok, I did a couple of tests yesterday and I found that the data are cleared by system startup . If i save a variables with the IOWR instruction outside the map of linker the variables are not erased, I think the alt_load function erases all the section (.text .rwdata etc..) but i don't understand how to configure the bsp setting to avoid this. I have the reset vector , .text, . rwdata , .rodata and the other section in sram.