Conrad C-Control Pro Mega Series, Руководство пользователя

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197 C-Control Pro Mega Series
© 2008 Conrad Electronic
With Mega128 for reasons of the hardware the use of Timer_0 as counter is not possible!
Timer1 (16 Bit)
// Example: Pulse Counting with CNT1
Timer_T1CNT ();
pulse(n); // generate n Pulses
count= Timer_T1GetCNT ();
6.19.2 Frequency Generation
To generate frequencies Timer_0, Timer_1 and Timer_3 can be utilized as follows:
Timer0 (8 Bit)
1. Example:
// Square Wave Signal with 10*1,085 µs = 10,85 µs Period Duration
Timer_T0FRQ( 10 , PS0_8)
2. Example: Pulsed Frequency Blocks (Project FRQ0)
void main(void)
{
int delval; // Variable for the On/Off Time
delval= 200 ; // Value Assignment for Variable delval
// Frequency: Period=138,9 µs*100=13,9 ms,Frequency=72Hz
Timer_T0FRQ ( 100 ,PS0_1024); // Timer is set to Frequency
while ( 1 )
{
AbsDelay(delval); // Time Delay by 200ms
Timer_T0Stop (); // Timer is stopped
AbsDelay(delval); // Time Delay by 200ms
Timer_T0Start (PS0_1024); // Timer will be switched on with
// Timer Prescaler PS0_1024.
}
}
The program will on Mega128 not work in USB mode since output PB4 is in conjunction with the USB
interface used on the Application Board.
Timer1 (16 Bit)
Example: Frequency Generation with 125 * 4,34 µs = 1085µs Period
Timer_T1FRQ ( 125 ,PS_64);