Digital-to-Analog Converter (DAC)
Overview
This sample demonstrates how to use the DAC driver API.
Building and Running
The DAC output is defined in the board’s devicetree and pinmux file.
The board’s /zephyr,user node must have dac,
dac-channel-id, and dac-resolution properties set. See the predefined
overlays in samples/drivers/dac/boards for examples.
Building and Running for ST Nucleo L073RZ
The sample can be built and executed for the Nucleo L073RZ as follows:
west build -b nucleo_l073rz samples/drivers/dac
west flash
Building and Running for ST Nucleo L152RE
The sample can be built and executed for the Nucleo L152RE as follows:
west build -b nucleo_l152re samples/drivers/dac
west flash
Building and Running for ST Nucleo F767ZI
The sample can be built and executed for the Nucleo F767ZI as follows:
west build -b nucleo_f767zi samples/drivers/dac
west flash
Building and Running for ST Disco F3
The sample can be built and executed for the STM32F3 Discovery as follows:
west build -b stm32f3_disco samples/drivers/dac
west flash
Building and Running for ST Nucleo F429ZI
The sample can be built and executed for the Nucleo F429ZI as follows:
west build -b nucleo_f429zi samples/drivers/dac
west flash
Building and Running for STM32L562E DK
The sample can be built and executed for the STM32L562E-DK Discovery as follows:
west build -b stm32l562e_dk samples/drivers/dac
west flash
Building and Running for ST Nucleo L552ZE Q
The sample can be built and executed for the Nucleo L552ZE Q as follows:
west build -b nucleo_l552ze_q samples/drivers/dac
west flash
Building and Running for NXP TWR-KE18F
The sample can be built and executed for the TWR-KE18F as follows:
west build -b twr_ke18f samples/drivers/dac
west flash
DAC output is available on pin A32 of the primary TWR elevator connector.
Building and Running for NXP FRDM-K64F
The sample can be built and executed for the FRDM-K64F as follows:
west build -b frdm_k64f samples/drivers/dac
west flash
DAC output is available on connector J4 pin 11.
Building and Running for BL652
The BL652 DVK PCB contains a footprint for a MCP4725 to use as an external DAC. Note this is not populated by default. The sample can be built and executed for the BL652 DVK as follows:
west build -b bl652_dvk samples/drivers/dac
west flash
DAC output is available on pin 1 of the MCP4725.
Building and Running for BL653
The BL653 DVK PCB contains a footprint for a MCP4725 to use as an external DAC. Note this is not populated by default. The sample can be built and executed for the BL653 DVK as follows:
west build -b bl653_dvk samples/drivers/dac
west flash
DAC output is available on pin 1 of the MCP4725.
Building and Running for BL654
The BL654 DVK PCB contains a footprint for a MCP4725 to use as an external DAC. Note this is not populated by default. The sample can be built and executed for the BL654 DVK as follows:
west build -b bl654_dvk samples/drivers/dac
west flash
DAC output is available on pin 1 of the MCP4725.
Building and Running for BL5340
The BL5340 DVK PCB contains a MCP4725 to use as a DAC. The sample can be built and executed for the BL5340 DVK as follows:
west build -b bl5340_dvk/nrf5340/cpuapp samples/drivers/dac
west flash
DAC output is available on pin 1 of the MCP4725.
Building and Running for GD32450I-EVAL
The sample can be built and executed for the GD32F450I-EVAL as follows:
west build -b gd32f450i_eval samples/drivers/dac
west flash
Bridge the JP23 to DAC with the jumper cap, then DAC output will available on JP7.
Building and Running for Longan Nano and Longan Nano Lite
The sample can be built and executed for the Longan Nano as follows:
west build -b longan_nano samples/drivers/dac
west flash
also can run for the Longan Nano Lite as follows:
west build -b longan_nano/gd32vf103/lite samples/drivers/dac
west flash
Building and Running for NXP LPCXpresso55S36
The sample can be built and executed for the LPCXpresso55S36 as follows:
west build -b lpcxpresso55s36 samples/drivers/dac
west flash
DAC output is available on connector J12 pin 4.
Sample output
You should see a sawtooth signal with an amplitude of the DAC reference voltage and a period of approx. 4 seconds at the DAC output pin specified by the board.
The following output is printed:
Generating sawtooth signal at DAC channel 1.
Note
If the DAC is not supported, the output will be an error message.