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README.rst
.. _rtc_clk_test: Espressif's RTC Clock test ########################## Overview ******** This test iterates through all the clock sources and checks if the expected frequency is being set. Espressif SOCs have 3 main clock subsystems: CPU, RTC_FAST and RTC_SLOW. Each of these subsystems have their own clock sources and possible rates. Supported Boards **************** - esp32_devkitc_wrover/esp32/procpu - esp32c3_devkitm - esp32c6_devkitc - esp32s2_saola - esp32s3_devkitm/esp32s3/procpu Building and Running ******************** Make sure you have the target connected over USB port. .. code-block:: console west build -b <board> tests/boards/espressif/rtc_clk west flash && west espressif monitor To run the test with twister, use the following command: .. code-block:: console west twister -p <board> --device-testing --device-serial=/dev/ttyUSB0 -vv --flash-before -T tests/boards/espressif/rtc_clk If the external 32K crystal is connect to pins 32K_XP and 32K_XN, the test can be run with ``external_xtal`` fixture enabled: .. code-block:: console west twister -p esp32c3_devkitm --device-testing --device-serial=/dev/ttyUSB0 -vv --flash-before -T tests/boards/espressif/rtc_clk -X external_xtal Sample Output ============= .. code-block:: console *** Booting Zephyr OS build v3.6.0-3162-g529005998ea6 *** Running TESTSUITE rtc_clk =================================================================== CPU frequency: 240000000 RTC_FAST frequency: 17500000 RTC_SLOW frequency: 136000 START - test_cpu_pll_src Testing CPU frequency: 80 MHz Testing CPU frequency: 160 MHz Testing CPU frequency: 240 MHz PASS - test_cpu_pll_src in 0.020 seconds =================================================================== START - test_cpu_xtal_src Testing CPU frequency: 40 MHz Testing CPU frequency: 20 MHz Testing CPU frequency: 10 MHz Testing CPU frequency: 5 MHz PASS - test_cpu_xtal_src in 17.645 seconds =================================================================== START - test_rtc_fast_src Testing RTC FAST CLK freq: 20000000 MHz Testing RTC FAST CLK freq: 17500000 MHz PASS - test_rtc_fast_src in 0.001 seconds =================================================================== START - test_rtc_slow_src Testing RTC SLOW CLK freq: 136000 MHz Testing RTC SLOW CLK freq: 68359 MHz PASS - test_rtc_slow_src in 0.002 seconds =================================================================== TESTSUITE rtc_clk succeeded ------ TESTSUITE SUMMARY START ------ SUITE PASS - 100.00% [rtc_clk]: pass = 4, fail = 0, skip = 0, total = 4 duration = 17.668 seconds - PASS - [rtc_clk.test_cpu_pll_src] duration = 0.020 seconds - PASS - [rtc_clk.test_cpu_xtal_src] duration = 17.645 seconds - PASS - [rtc_clk.test_rtc_fast_src] duration = 0.001 seconds - PASS - [rtc_clk.test_rtc_slow_src] duration = 0.002 seconds ------ TESTSUITE SUMMARY END ------ =================================================================== PROJECT EXECUTION SUCCESSFUL