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adc: add comment for ADC sampling frequency

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This commit is contained in:
Armando
2021-01-05 11:00:05 +08:00
committed by bot
parent d8a4b247b9
commit f9ec7ddda3
4 changed files with 19 additions and 22 deletions
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components/hal/include/hal/adc_types.h
+4 -5
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@@ -286,12 +286,11 @@ typedef struct {
If the number of measurements reaches `dma_eof_num`, then `dma_in_suc_eof` signal is generated in DMA.
Note: The converted data in the DMA in link buffer will be multiple of two bytes. */
#elif CONFIG_IDF_TARGET_ESP32C3
uint32_t sample_freq_hz; /*!< The expected ADC sampling frequency in Hz. Range: 610Hz ~ 83333Hz
Fs: sampling frequency;
Fd: digital controller frequency
interval: interval between 2 measurement trigger signal
uint32_t sample_freq_hz; /*!< The expected ADC sampling frequency in Hz. Range: 611Hz ~ 83333Hz
Fs = Fd / interval / 2
Range: the smallest interval should not be smaller than the ADC measurement period. The largest interval should not be larger than 4095. */
Fs: sampling frequency;
Fd: digital controller frequency, no larger than 5M for better performance
interval: interval between 2 measurement trigger signal, the smallest interval should not be smaller than the ADC measurement period, the largest interval should not be larger than 4095 */
#endif
} adc_digi_config_t;