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Documentation/risc-v: Add SDM peripheral docs for esp32[-c3|-c6|-h2]

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Add SDM peripheral docs for risc-v based Espressif devices

Signed-off-by: Eren Terzioglu <eren.terzioglu@espressif.com>
This commit is contained in:
Eren Terzioglu 2025-04-28 11:23:35 +02:00 • committed by Xiang Xiao
parent 521e1b15b6
commit bf2a7ad49a
3 changed files with 39 additions and 0 deletions
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13
Documentation/platforms/risc-v/esp32c3/boards/esp32c3-generic/index.rst
View file

@ -347,6 +347,19 @@ 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-C3 supports 1 group of SDM up to 4 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.
spi
--------

13
Documentation/platforms/risc-v/esp32c6/boards/esp32c6-devkitc/index.rst
View file

@ -347,6 +347,19 @@ 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-C6 supports 1 group of SDM up to 4 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.
spi
--------

13
Documentation/platforms/risc-v/esp32h2/boards/esp32h2-devkit/index.rst
View file

@ -318,6 +318,19 @@ 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-H2 supports 1 group of SDM up to 4 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.
spi
--------