alex/esp-idf
alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2024-10-05 20:47:46 -04:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity
7933b75416
esp-idf/examples/peripherals/mcpwm/mcpwm_basic_config
History
Anton Maklakov 3d1d4fe150 build: Fix the warnings that break the tests 
unused variable 'lfn'
    'isr_handler' defined but not used
    'servo_set_angle' defined but not used
    'gpio_test_signal' defined but not used
    'change_duty' defined but not used
2017-07-07 11:03:25 +08:00
..
main build: Fix the warnings that break the tests 2017-07-07 11:03:25 +08:00
Makefile feature: add Motor Control PWM(mcpwm) driver 2017-05-12 15:47:59 +08:00
README.md feature: add Motor Control PWM(mcpwm) driver 2017-05-12 15:47:59 +08:00

README.md

MCPWM basic config Example

This example will show you how to use each submodule of MCPWM unit

The example can't be used without modifying the code first

Edit the macros at the top of mcpwm_example_basic_config.c to enable/disable the submodules which are used in the example

Step 1: Pin assignment

  • The gpio init function initializes:
    • six MCPWM output pins
    • three MCPWM fault input pins
    • three MCPWM sync input pins
    • three MCPWM capture input pins

Step 2: Connection

  • Six MCPWM output pins to motor driver input signals
  • Fault, sync, capture signals can be connected to respective signals

Step 3: Initialize MCPWM

  • You need to set the frequency and duty cycle of each three MCPWM timer along with other parameters mentioned
  • You need to set the MCPWM channel you want to use, with these timers

Step 4: Testing

  • The deadtime module, set deadtime type and with value as time*100ns
  • The sync module, synchonizes all the timer pulses
  • The fault module when enabled takes action on MCPWM signals when fault occurs
  • The capture module captures input signal(digital i.e. hall sensor value, etc), timing between two rising/falling edge