Skip to content

adf4377: add bleed delay & channel inversion, migrate eval project to STM32 #3214

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
skucukar wants to merge 4 commits into
base: main
Choose a base branch
from
Open

adf4377: add bleed delay & channel inversion, migrate eval project to STM32 #3214

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
4666156
drivers: frequency: adf4377: add bleed delay support
skucukar Jul 14, 2026
b6a3dfa
drivers: frequency: adf4377: add bleed delay iio attr
skucukar Jul 14, 2026
47a1742
drivers: frequency: adf4377: document new features in readme
skucukar Jul 14, 2026
afba3a0
project: adf4377_sdz: migration from mbed to stm32
skucukar Jul 14, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
22 changes: 21 additions & 1 deletion drivers/frequency/adf4377/README.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -110,6 +110,16 @@ by default to 1023. This can be configured using the **adf4377_set_bleed_word**
API, by providing the bleed word as a parameter on 10 bits. The current
configuration can be read out using **adf4377_get_bleed_word**.

Bleed Delay Configuration
-------------------------

Instead of programming the raw bleed word, the bleed current can also be
expressed as an output delay. The **adf4377_set_bleed_delay** API accepts the
desired delay in femtoseconds (a negative value selects the opposite polarity)
and translates it into the corresponding bleed word based on the charge pump
current and PFD frequency. The current configuration can be read back in
femtoseconds using **adf4377_get_bleed_delay**.

Output Frequency Configuration
------------------------------

Expand Down Expand Up @@ -144,6 +154,13 @@ used.

By default only channel 1 is enabled.

Output Inversion Configuration
------------------------------

The output of each channel can be inverted using the **adf4377_set_channel_inv**
API, by providing the channel number and the desired inversion value (0 or 1).
The current configuration can be read out using **adf4377_get_channel_inv**.

SYSREF Output Configuration
---------------------------
There are two distinct ways to configure the SYSREF output:
Expand Down Expand Up @@ -294,6 +311,8 @@ therefore most of the attributes will be device attributes.
The attributes are:

* bleed_current - is the adjustment value for the set charge pump current.
* bleed_delay - is the bleed current expressed as an output delay in
femtoseconds.
* charge_pump_current - is the current set in your design.
* charge_pump_current_available - lists the available and predefined charge
pump currents of the ADF4377.
Expand Down Expand Up @@ -321,10 +340,11 @@ The channels are:
* output altvoltage0 - corresponding to channel 1 on the device
* output altvoltage1 - corresponding to channel 2 on the device

Each channel has 2 individual attributes:
Each channel has 3 individual attributes:

* en - enables the channel.
* output_power - determines the output power of the channel between 0 and 15.
* inv - inverts the channel output.

Each channel has 2 common attributes:

Expand Down
Loading
Loading