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Diffstat (limited to 'docs/adc_driver.md')
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diff --git a/docs/adc_driver.md b/docs/adc_driver.md index 69fff4b3c2..494d90c94f 100644 --- a/docs/adc_driver.md +++ b/docs/adc_driver.md @@ -43,6 +43,8 @@ Then place this include at the top of your code: ### ARM +#### STM32 + Note that some of these pins are doubled-up on ADCs with the same channel. This is because the pins can be used for either ADC. Also note that the F0 and F3 use different numbering schemes. The F0 has a single ADC and the channels are 0-indexed, whereas the F3 has 4 ADCs and the channels are 1-indexed. This is because the F0 uses the `ADCv1` implementation of the ADC, whereas the F3 uses the `ADCv3` implementation. @@ -121,6 +123,21 @@ Also note that the F0 and F3 use different numbering schemes. The F0 has a singl <sup>² Not all STM32F4xx devices have ADC2 and/or ADC3, therefore some configurations shown in this table may be unavailable; in particular, pins `F4`…`F10` cannot be used as ADC inputs on devices which do not have ADC3. Check the device datasheet to confirm which pin functions are supported.</sup> +#### RP2040 + +RP2040 has only a single ADC (`ADCD1` in ChibiOS); in the QMK API the index for that ADC is 0. + +|Channel|Pin | +|-------|-------------------| +|0 |`GP26` | +|1 |`GP27` | +|2 |`GP28` | +|3 |`GP29` | +|4 |Temperature sensor*| + + +<sup>* The temperature sensor is disabled by default and needs to be enabled by the RP2040-specific function: `adcRPEnableTS(&ADCD1)`. The ADC must be initialized before calling that function; an easy way to ensure that is to perform a dummy conversion.</sup> + ## Functions ### AVR |