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Altera_Forum
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11 years ago

Very low speed of HPS after Preloader

I try insert next code for Altera examples in main(): volatile int i; for (i = 0; i < 800*1000*1000; i++) ; In SDRAM-variant work is greater than 2 min, in HelloWorld for FFFF0000-addresses ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Help me ! Anyone repeat simple cycle and see weird slow speed ?

Very ill is have so powerered HPS and use 1/50 as 20-MHz microcontroller !

I has set all Clock Manager registers in Baremetal as in Linux with normal speed -- no result. Cache +/- is not impact.

I try in DS-5 to change values of all registers in Registers window -- is only evident influence of M (Mode) field in CSPR: with SVC -> USR speed is faster in 1.5 times.

In Linux is not visible most registers that is visible in Baremetal, comparing and copying is impossible.

Or to which forum/document go ?