DSCQMMPWM

Structure containing configuration data for pulse width modulation function on Quartz-MM. The structure contains both input and output parameters.

Structure Definion

typedef struct {

    BYTE init;
    BYTE counter;
    FLOAT output_freq;
    FLOAT duty_cycle;
    DWORD input_freq;
    WORD load_reg;
    WORD hold_reg; 
    BYTE hit_extreme;

} DSCQMM_PWM;

Structure Members

Name	Description
init	1 if the current function call is an initializing call, i.e. the first call for this counter and this output frequency 0 if the current function call is just to modify the duty cycle of a currently-running PWM signal
counter	Counter number: 1-5 for QMM-5, 1-10 for QMM-10
output_freq	Desired output frequency; the function will select the best clock source from the 9513 chip's built-in frequency generator to achieve the desired output frequency with maximum duty cycle resolution
duty_cycle	Desired duty cycle in percent: range is 0 - 99.99 in steps of .01; a duty cycle of 100% is not possible
input_freq	Input clock source selected by the function
load_reg	Resulting load register value from the selected output frequency and duty cycle
hold_reg	Resulting load register value from the selected output frequency and duty cycle
hit_extreme	1 if the function has reached either duty cycle limit (0 or 99.99); 0 otherwise