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Documentation/xtensa: Add SDM docs for esp32[-|-s2|-s3]

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Add SDM docs for Xtensa based Espressif devices

Signed-off-by: Eren Terzioglu <eren.terzioglu@espressif.com>
This commit is contained in:
Eren Terzioglu 2025-04-28 14:19:45 +02:00 • committed by Xiang Xiao
parent 4b36d69630
commit 9a59cf4004
3 changed files with 39 additions and 0 deletions
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13
Documentation/platforms/xtensa/esp32/boards/esp32-devkitc/index.rst
View file

@ -931,6 +931,19 @@ You can set an alarm, check its progress and receive a notification after it exp
Alarm 0 is active with 10 seconds to expiration
nsh> alarm_daemon: alarm 0 received
sdm
---
This configuration enables the support for the Sigma-Delta Modulation (SDM) driver
which can be used for LED dimming, simple dac with help of an low pass filter either
active or passive and so on. ESP32 supports 1 group of SDM up to 8 channels with
any GPIO up to user. This configuration enables 1 channel of SDM on GPIO5. You can test
DAC feature with following command with connecting simple LED on GPIO5
nsh> dac -d 100 -s 10 test
After this command you will see LED will light up in different brightness.
smp
---

13
Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst
View file

@ -430,6 +430,19 @@ You can set an alarm, check its progress and receive a notification after it exp
Alarm 0 is active with 10 seconds to expiration
nsh> alarm_daemon: alarm 0 received
sdm
---
This configuration enables the support for the Sigma-Delta Modulation (SDM) driver
which can be used for LED dimming, simple dac with help of an low pass filter either
active or passive and so on. ESP32-S2 supports 1 group of SDM up to 8 channels with
any GPIO up to user. This configuration enables 1 channel of SDM on GPIO5. You can test
DAC feature with following command with connecting simple LED on GPIO5
nsh> dac -d 100 -s 10 test
After this command you will see LED will light up in different brightness.
timer
-----

13
Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst
View file

@ -657,6 +657,19 @@ You can set an alarm, check its progress and receive a notification after it exp
Alarm 0 is active with 10 seconds to expiration
nsh> alarm_daemon: alarm 0 received
sdm
---
This configuration enables the support for the Sigma-Delta Modulation (SDM) driver
which can be used for LED dimming, simple dac with help of an low pass filter either
active or passive and so on. ESP32-S3 supports 1 group of SDM up to 8 channels with
any GPIO up to user. This configuration enables 1 channel of SDM on GPIO5. You can test
DAC feature with following command with connecting simple LED on GPIO5
nsh> dac -d 100 -s 10 test
After this command you will see LED will light up in different brightness.
sdmmc
-----