When PWM APIs are used, the PWM driver calculates and configures the master clock, divides ratio, M, and resolution to best fit the requested period. Use PWM frequency > 100 Hz to avoid flickering. Use a slow PWM frequency to see blinking....
2) IC_GetMeasurement returns captured value of FTM counter at the time edge happens, if edge detect mode is selected ( rising, falling or both edges) or difference of 2 captured value if signal measurement mode is selected (period between 2 rising/falling edges or...
This example is similar to Example 1, except here we reduce the PWM Period to 1ms and Duty-cycle will vary from 0%(LED OFF) to 100%(Brightest). Connect the LED anode to P1.18 and cathode to GND using a suitable resistor (like >330 Ohms). ...
In the interrupt service routine (ISR), read the captured values to calculate the period and duty cycle. Calculation: The period of the PWM signal is the difference between successive rising edge captures. The duty cycle is calculated as the time between a rising and the next falling ...
I am not sure how it is creating glitches .. with the available shadow regsiters it is not likely to experience glitches .. your ePWM should load only once from your shadow register at period or counter zero or both depedning on your configuration... since your duty cycle calculation routi...
(period) › An overflow of timer T12 triggers the second interrupt (CCU6_period_match_isr()) which is used for counting: – the overflows between two rising edges for PWM frequency calculation – the overflows between the rising edge and the falling edge for PWM duty cycle calcula...
Use float for DutyCycle and Freq, uint32_t for period. Optimize code by not calculation in ISR khoih-prog added a commit to khoih-prog/RP2040_Slow_PWM that referenced this issue Feb 2, 2022 v1.2.0 to fix multiple-definitions linker error … 43927a8 khoih-prog added a commit to...
// the maximum period you can set is 2^16 - 1. // TODO: modify this calculation to use the clock frequency that you are // using. // PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, 64000); // // Set PWM0 PD0 to a duty cycle of 25%. You set the duty cycle as...
The high accuracy pulse duty-cycle calculation hardware implementation scheme is composed of a clock generator block, digital pulse width account block, digital memory block to store pulse width in digital and digital-analog divider block with two digital-analog converters. The digital pulse width ...
// the maximum period you can set is 2^16 - 1. // TODO: modify this calculation to use the clock frequency that you are // using. // PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, 64000); // // Set PWM0 PD0 to a duty cycle of 25%. You set the duty cycle as a ...