On Dec 2, 2008, at 2:48 PM, Hiroshi Ito wrote:
+static void output_data(void)
+{
+ int i;
+ *gpio_data_register = output_value ^ INVERT_BITS;
+ for ( i = 0; i < 10; i++ )
+ ;
}
A for loop like that can't reliably be used as a delay loop. First, the speed of the loop is non-deterministic since it depends entirely on the speed of the host CPU and its ability to execute loops efficiently. Second, at any optimization level a compiler is likely to remove the for since it has no semantic effect. Is a specific amount of time delay necessary? Can the device be polled instead?
-- Rick Altherr [EMAIL PROTECTED]"He said he hadn't had a byte in three days. I had a short, so I split it with him."
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