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Analog Write ​

Simplified API for converting digital values to analog voltages.

While a possible future version of the OS will have a more complex analog API, at the moment the analog APIs are only meant to provide a quick means for reading e.g. a battery voltage or providing a controllable voltage reference for an external analog circuitry. If your application needs to e.g. gather high frequency analog samples from a microphone a vendor-specific implementation for the analog peripheral has to be written in application code.

Sysprops ​

Sysprops for the ADC are driver dependent. Please refer to the documentation of the specific hardware driver you're using.

Functions Overview ​

Name
CW_DRIVER_FUNCdac_convert(int hDev, uint32_t val)

Function Details ​

function dac_convert ​

cpp
CW_DRIVER_FUNC dac_convert(
    int hDev,
    uint32_t val
)

Parameters:

  • hDev device handle as returned by open(const char*)
  • val set the value according to the HAL peripheral drivers translation function. for a 12bit DAC e.g passing 4095 will output the max voltage vRef.