93 lines
2.7 KiB
Markdown
93 lines
2.7 KiB
Markdown
Digi APIX ADC Sample Application
|
|
===================================
|
|
|
|
Sample application to access and manage ADC channels using the Digi APIX library.
|
|
|
|
The application enables one ADC channel on the board. After that, the application
|
|
takes periodic samples and calculates the rms and mean value of the samples batch.
|
|
|
|
The ADC lines used in the sample are mapped as follows in the Digi Boards:
|
|
- **CCIMX6 SBC**: PMIC_ADCIN1 (GPIO Connector Pin 1).
|
|
- **CCIMX6UL SBC Express**: ADC1_IN4 (Expansion Connector Pin 7).
|
|
- **CCIMX6UL SBC Pro**: ADC1_IN2 (GPIO Connector Pin 13).
|
|
|
|
The following device tree modifications are required for the sample to work:
|
|
- **CCIMX6 SBC**: _No device tree modifications are required._
|
|
- **CCIMX6UL SBC Express**:
|
|
```
|
|
&adc1 {
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&pinctrl_adc1>;
|
|
adc-ch-list = <4>;
|
|
status = "okay";
|
|
};
|
|
|
|
&iomuxc {
|
|
imx6ul-ccimx6ul {
|
|
pinctrl_adc1: adc1grp {
|
|
fsl,pins = <
|
|
MX6UL_PAD_GPIO1_IO04__GPIO1_IO04 0xb0
|
|
>;
|
|
};
|
|
};
|
|
};
|
|
```
|
|
- **CCIMX6UL SBC Pro**:
|
|
```
|
|
&adc1 {
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&pinctrl_adc1>;
|
|
adc-ch-list = <2>;
|
|
status = "okay";
|
|
};
|
|
|
|
&iomuxc {
|
|
imx6ul-ccimx6ul {
|
|
pinctrl_adc1: adc1grp {
|
|
fsl,pins = <
|
|
MX6UL_PAD_GPIO1_IO02__GPIO1_IO02 0xb0
|
|
>;
|
|
};
|
|
};
|
|
};
|
|
```
|
|
|
|
Running the application
|
|
-----------------------
|
|
Once the binary is in the target, launch the application:
|
|
```
|
|
#> apix-adc-example [adc_chip adc_channel interval number_of_samples]
|
|
```
|
|
Where:
|
|
- 'adc_chip' the ADC chip number.
|
|
- 'adc_channel' the ADC channel number.
|
|
- 'interval' is the time interval between samples.
|
|
- 'number_of_samples' is the number of samples to take.
|
|
|
|
Compiling the application
|
|
-------------------------
|
|
This demo can be compiled using a Digi Embedded Yocto based toolchain. Make
|
|
sure to source the corresponding toolchain of the platform you are using, e.g:
|
|
|
|
```
|
|
$> . <DEY-toolchain-path>/environment-setup-cortexa7hf-vfp-neon-dey-linux-gnueabi
|
|
$> make
|
|
```
|
|
|
|
More information about [Digi Embedded Yocto](https://github.com/digi-embedded/meta-digi).
|
|
|
|
License
|
|
-------
|
|
Copyright 2017, Digi International Inc.
|
|
|
|
Permission to use, copy, modify, and/or distribute this software for any purpose
|
|
with or without fee is hereby granted, provided that the above copyright notice
|
|
and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
|
|
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
|
|
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
|
|
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
|
|
THIS SOFTWARE. |