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