espressif/zero_detection

[![Component Registry](https://components.espressif.com/components/espressif/zero_detection/badge.svg)](https://components.espressif.com/components/espressif/zero_detection) # Component: Zero_Detection [Online documentation](https://docs.espressif.com/projects/esp-iot-solution/en/latest/others/zero_detection.html) The zero cross detection driver is a component designed to analyze zero cross signals. By examining the period and triggering edges of zero cross signals, it can determine the signal's validity, invalidity, whether it exceeds the expected frequency range, and if there are signal losses. The program returns results in the form of events, meeting the user's need for timely signal processing. Additionally, it supports the analysis of two types of zero cross signals, including square waveforms and pulse types. After creating a new zero detection object by calling function `zero_detect_create()`, the zero detection object can create many events. Afterward, users can register the interrupt by calling function `zero_detect_register_cb()`, Note: The prefix `IRAM_ATTR` should be added before registering the user-written interrupt function. List of supported events: * SIGNAL_FREQ_OUT_OF_RANGE * SIGNAL_VALID * SIGNAL_INVALID * SIGNAL_LOST * SIGNAL_RISING_EDGE * SIGNAL_FALLING_EDGE Users have the flexibility to configure the program's drive modes, including MCPWM capture and GPIO interrupt. Furthermore, users can adjust parameters such as the effective frequency range and the number of valid signal judgments, providing a high level of flexibility. There are two ways this driver can handle signal: 1. Analyzing and collecting signals using GPIO interrupts 2. Using GPIO for signal collection and analysis ## Add component to your project Please use the component manager command `add-dependency` to add the `zero_detection` to your project's dependency, during the `CMake` step the component will be downloaded automatically ``` idf.py add-dependency "espressif/zero_detection=*" ```

# Example: Zero_Cross_Detection (See the README.md file in the upper level 'examples' directory for more information about examples.) This routine demonstrates the detection and analysis of zero-crossing signals, as well as the control of relays. ## GPIO functions: | GPIO | Direction | Configuration | | ---------------------------- | --------- | ------------------------------------------------------ | | CONFIG_GPIO_OUTPUT_5 | output | control the relay | | CONFIG_GPIO_INPUT_2 | input | pulled up, interrupt from rising edge and falling edge | ## How to use example Before project configuration and build, be sure to set the correct chip target using `idf.py set-target <chip_name>`. ### Hardware Required * A development board with any Espressif SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.) * A USB cable for Power supply and programming * Some jumper wires to connect GPIOs. * Zero cross singal Source ### Configure the project Before compiling the project, configure it using `idf.py menuconfig` ### Build and Flash Build the project and flash it to the board, then run the monitor tool to view the serial output: Run `idf.py -p PORT flash monitor` to build, flash and monitor the project. (To exit the serial monitor, type ``Ctrl-]``.) See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html) for full steps to configure and use ESP-IDF to build projects. ## Example Output ```log I (318) zero_detect: Install gptimer I (328) zero_detect: Install gptimer alarm I (328) zero_detect: Register powerdown callback I (338) zero_detect: Install capture timer I (338) zero_detect: Install capture channel I (348) gpio: GPIO[2]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0 I (358) zero_detect: Register capture callback I (358) zero_detect: Enable capture channel I (368) zero_detect: Enable and start capture timer I (368) gpio: GPIO[5]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 I (878) zero_detect: Measured Time: 6.00ms Hz:166.67 EVENT: OUT OF RANGE COUNT:246 OFF COUNT:0 OPEN COUNT:0 W (878) example: Process suspened, please wait till relay open I (878) example: Set control relay on I (1388) zero_detect: Measured Time: 6.00ms Hz:166.67 EVENT: OUT OF RANGE COUNT:416 OFF COUNT:0 OPEN COUNT:0 W (1388) example: Process suspened, please wait till relay open I (1388) example: Set control relay on I (1898) zero_detect: Measured Time: 8.00ms Hz:125.00 EVENT: OUT OF RANGE COUNT:580 OFF COUNT:0 OPEN COUNT:0 W (1898) example: Process suspened, please wait till relay open I (1898) example: Set control relay on I (2408) zero_detect: Measured Time: 8.00ms Hz:125.00 EVENT: OUT OF RANGE COUNT:708 OFF COUNT:0 OPEN COUNT:0 W (2408) example: Process suspened, please wait till relay open I (2408) example: Set control relay on I (2918) zero_detect: Measured Time: 10.00ms Hz:100.00 EVENT: OUT OF RANGE COUNT:831 OFF COUNT:0 OPEN COUNT:0 W (2918) example: Process suspened, please wait till relay open I (2918) example: Set control relay on I (3428) zero_detect: Measured Time: 10.00ms Hz:100.00 EVENT: OUT OF RANGE COUNT:933 OFF COUNT:0 OPEN COUNT:0 W (3428) example: Process suspened, please wait till relay open I (3428) example: Set control relay on I (3938) zero_detect: Measured Time: 12.00ms Hz:83.33 EVENT: OUT OF RANGE COUNT:1031 OFF COUNT:0 OPEN COUNT:0 W (3938) example: Process suspened, please wait till relay open I (3938) example: Set control relay on I (4448) zero_detect: Measured Time: 12.00ms Hz:83.33 EVENT: OUT OF RANGE COUNT:1116 OFF COUNT:0 OPEN COUNT:0 W (4448) example: Process suspened, please wait till relay open I (4448) example: Set control relay on I (4958) zero_detect: Measured Time: 14.00ms Hz:71.43 EVENT: OUT OF RANGE COUNT:1198 OFF COUNT:0 OPEN COUNT:0 W (4958) example: Process suspened, please wait till relay open I (4958) example: Set control relay on I (5468) zero_detect: Measured Time: 14.00ms Hz:71.43 EVENT: OUT OF RANGE COUNT:1271 OFF COUNT:0 OPEN COUNT:0 W (5468) example: Process suspened, please wait till relay open I (5468) example: Set control relay on I (5978) zero_detect: Measured Time: 16.00ms Hz:62.50 EVENT: OUT OF RANGE COUNT:1323 OFF COUNT:0 OPEN COUNT:1 I (6478) zero_detect: Measured Time: 16.00ms Hz:62.50 EVENT: OUT OF RANGE COUNT:1323 OFF COUNT:0 OPEN COUNT:1 I (6978) zero_detect: Measured Time: 18.00ms Hz:55.56 EVENT: OUT OF RANGE COUNT:1323 OFF COUNT:0 OPEN COUNT:1 I (7478) zero_detect: Measured Time: 18.00ms Hz:55.56 EVENT: OUT OF RANGE COUNT:1323 OFF COUNT:0 OPEN COUNT:1 I (7978) zero_detect: Measured Time: 20.00ms Hz:50.00 EVENT: OUT OF RANGE COUNT:1323 OFF COUNT:0 OPEN COUNT:1 I (8478) zero_detect: Measured Time: 20.00ms Hz:50.00 EVENT: OUT OF RANGE COUNT:1323 OFF COUNT:0 OPEN COUNT:1 I (8978) zero_detect: Measured Time: 22.00ms Hz:45.45 EVENT: OUT OF RANGE COUNT:1323 OFF COUNT:0 OPEN COUNT:1 I (9478) zero_detect: Measured Time: 22.00ms Hz:45.45 EVENT: OUT OF RANGE COUNT:1323 OFF COUNT:0 OPEN COUNT:1 I (9978) zero_detect: Measured Time: 24.00ms Hz:41.67 EVENT: OUT OF RANGE COUNT:1335 OFF COUNT:0 OPEN COUNT:1 I (10478) zero_detect: Measured Time: 24.00ms Hz:41.67 EVENT: OUT OF RANGE COUNT:1376 OFF COUNT:0 OPEN COUNT:1 I (10978) zero_detect: Measured Time: 26.00ms Hz:38.46 EVENT: OUT OF RANGE COUNT:1417 OFF COUNT:0 OPEN COUNT:1 I (11478) zero_detect: Measured Time: 26.00ms Hz:38.46 EVENT: OUT OF RANGE COUNT:1456 OFF COUNT:0 OPEN COUNT:1 I (11978) zero_detect: Measured Time: 28.00ms Hz:35.71 EVENT: OUT OF RANGE COUNT:1493 OFF COUNT:0 OPEN COUNT:1 ``` ## Troubleshooting For any technical queries, please open an [issue](https://github.com/espressif/esp-iot-solution/issues) on GitHub. 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