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ADC FIFO depth is the same on both RP2040 and RP2350

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Both chips have "8 element receive sample FIFO"
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Andrew Scheller 2026-01-26 16:24:04 +00:00 • committed by GitHub
parent 9c6713a8ed
commit 8540a90b0c
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1 changed files with 4 additions and 18 deletions
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22
src/rp2_common/hardware_adc/include/hardware/adc.h
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@ -25,16 +25,15 @@
* - RP2040 5 input mux:
* - 4 inputs that are available on package pins shared with GPIO[29:26]
* - 1 input is dedicated to the internal temperature sensor
* - 4 element receive sample FIFO
* \endif
*
* \if rp2350_specific
* - RP2350 5 or 9 input mux:
* - 4 inputs available on QFN-60 package pins shared with GPIO[29:26]
* - 8 inputs available on QFN-80 package pins shared with GPIO[47:40]
* - 8 element receive sample FIFO
* - One input dedicated to the internal temperature sensor (see Section 12.4.6)
* \endif
* - One input dedicated to the internal temperature sensor (see Section 12.4.6)
* - 8 element receive sample FIFO
* - Interrupt generation
* - DMA interface
*
@ -213,14 +212,7 @@ static inline void adc_set_clkdiv(float clkdiv) {
/*! \brief Setup the ADC FIFO
* \ingroup hardware_adc
*
* \if rp2040_specific
* On RP2040 the FIFO is 4 samples long.
* \endif
*
* \if rp2350_specific
* On RP2350 the FIFO is 8 samples long.
* \endif
*
* The FIFO is 8 samples long.
* If a conversion is completed and the FIFO is full, the result is dropped.
*
* \param en Enables write each conversion result to the FIFO
@ -256,13 +248,7 @@ static inline bool adc_fifo_is_empty(void) {
/*! \brief Get number of entries in the ADC FIFO
* \ingroup hardware_adc
*
* \if rp2040_specific
* On RP2040 the FIFO is 4 samples long.
* \endif
* \if rp2350_specific
* On RP2350 the FIFO is 8 samples long.
* \endif
*
* The FIFO is 8 samples long.
* This function will return how many samples are currently present.
*/
static inline uint8_t adc_fifo_get_level(void) {