Echelon Neuron C - Manual (Page 98)

78 Functions
len Specifies the length of the data buffer, 1 to 255 bytes. A
value of 0 represents 256 bytes.
Example
#include
unsigned data[SIZE];
void f(void)
{
long seed = 0x04C1;
long
crc;
crc = crc16_ccitt(seed, *data, SIZE);
}
delay( ) Function
The delay( ) function allows an application to suspend processing for a given
time. This function provides more precise timing than can be achieved with
application timers.
Table 29 lists the formulas for determining the duration of the delay.
Table 29. Delay Values for Various System Clock Rates
Series 3100
Input Clock
Series 5000
System Clock Delay (in microseconds)
— 80 MHz 0.0375*(max(1,min(65535,count*16))*42+221)
— 40 MHz 0.075*(max(1,min(65535,count*8))*42+204)
— 20 MHz 0.15*(max(1,min(65535,count*4))*42+187)
40 MHz — 0.15*(max(1,min(65535,count*4))*42+176)
— 10 MHz 0.3*(max(1,min(65535,count*2))*42+170)
20 MHz — 0.3*(max(1,min(65535,count*2))*42+159)
— 5 MHz 0.6*(max(1,count)*42+139)
10 MHz — 0.6*(max(1,count)*42+128)
6.5536 MHz — 0.9155*((max(1,floor(count/2))*42+450)
5 MHz — 1.2*((max(1,floor(count/2))*42)+155)
2.5 MHz — 2.4*((max(1,floor(count/4))*42)+172)
1.25 MHz — 4.8*((max(1,floor(count/8))*42)+189)