abawo/pico-sdk
3
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add function to get the currently selected channel (#451)

Browse Source 
This is most useful in combination with round-robin sampling to avoid
having to track it manually.
This commit is contained in:
Jonathan Reichelt Gjertsen 2021-05-27 14:25:40 +02:00 committed by GitHub
parent a531123080
commit 5ad072af5b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/rp2_common/hardware_adc/include/hardware/adc.h
View File

@ -88,6 +88,15 @@ static inline void adc_select_input(uint input) {
hw_write_masked(&adc_hw->cs, input << ADC_CS_AINSEL_LSB, ADC_CS_AINSEL_BITS); hw_write_masked(&adc_hw->cs, input << ADC_CS_AINSEL_LSB, ADC_CS_AINSEL_BITS);
} }
/*! \brief Get the currently selected ADC input channel
* \ingroup hardware_adc
*
* \return The currently selected input channel. 0...3 are GPIOs 26...29 respectively. Input 4 is the onboard temperature sensor.
*/
static inline uint adc_get_selected_input(void) {
return (adc_hw->cs & ADC_CS_AINSEL_BITS) >> ADC_CS_AINSEL_LSB;
}
/*! \brief Round Robin sampling selector /*! \brief Round Robin sampling selector
* \ingroup hardware_adc * \ingroup hardware_adc
* *