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Added some optimization to remove the 1us delay on the write pulse, but I'm not sure that it matters much.

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Doug Brown 2011-12-11 13:45:17 -08:00
parent b4eb6c3ddc
commit 7099218bf1
1 changed files with 3 additions and 1 deletions
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external_mem.c
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@ -141,7 +141,9 @@ void ExternalMem_WriteCycle(uint32_t address, uint32_t data)
ExternalMem_DeassertOE();
ExternalMem_SetAddressAndData(address, data);
ExternalMem_AssertWE();
_delay_us(1); // Give it a small amount of time needed? Could I do this with some NOP instructions instead of waiting 1us?
//_delay_us(1); // Give it a small amount of time needed? Could I do this with some NOP instructions instead of waiting 1us?
// The minimum pulse time is 50 ns or so, and since one clock cycle is
// 62.5 ns, this should be fine to assert and deassert immediately
ExternalMem_DeassertWE();
}