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----------
-- MISC --
----------
JZ.misc = {}
function JZ.misc.enable_sram()
HW.CPM.CLKGATE1.SRAM.clr()
HW.CPM.CLKGATE1.AHB1.clr()
end
function JZ.misc.test_sram()
DEV.write32(0xb32d0000, 0xaaaa5555)
if DEV.read32(0xb32d0000) ~= 0xaaaa5555 then
error("SRAM is not working")
end
DEV.write32(0xb32d0000, 0xdeadbeef)
if DEV.read32(0xb32d0000) ~= 0xdeadbeef then
error("SRAM is not working")
end
print("SRAM seems to be working")
size = 0
for i=4,64*1024,4 do
DEV.write32(0xb32d0000, 0xdeadbeef)
DEV.write32(0xb32d0000 + i, 0xcafebabe)
if DEV.read32(0xb32d0000 + i) ~= 0xcafebabe or DEV.read32(0xb32d0000) == 0xcafebabe then
size = i
break
end
end
print(string.format("SRAM size: 0x%x (%d KiB)", size, size / 1024))
-- double check
for i=0,size-1,2 do
DEV.write16(0xb32d0000 + i, i)
end
for i=0,size-1,2 do
if DEV.read16(0xb32d0000 + i) ~= i then
error(string.format("SRAM size is not confirmed: read @%x gives %d instead of %d",
0xb32d0000 + i, DEV.read16(0xb32d0000 + i), i))
end
end
print("SRAM size confirmed and working")
end
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