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qmk_firmware/platforms/chibios/drivers/analog.c
Sergey Vlasov 81ca83296f
analog.c: Fix pinToMux() for STM32F0xx (#19658) 
The `adc_read()` code for STM32F0xx expects to get the 0-based channel
number in `mux.input`, but the `pinToMux()` code for STM32F0xx was
attempting to pass the CHSELR bit mask in that field, which resulted in
selecting a wrong channel, therefore `analogReadPin()` did not work
properly for the STM32F0xx chips.  Fix `pinToMux()` to put the channel
number in that field (this matches the behavior for other supported
chips and also allows selection of channels 16...18, which can be used
to access the builtin temperature, reference voltage and VBAT sensors).
2023-01-25 01:47:55 +00:00

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/* Copyright 2019 Drew Mills
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "analog.h"
#include <ch.h>
#include <hal.h>
#if !HAL_USE_ADC
# error "You need to set HAL_USE_ADC to TRUE in your halconf.h to use the ADC."
#endif
#if !RP_ADC_USE_ADC1 && !STM32_ADC_USE_ADC1 && !STM32_ADC_USE_ADC2 && !STM32_ADC_USE_ADC3 && !STM32_ADC_USE_ADC4 && !WB32_ADC_USE_ADC1
# error "You need to set one of the 'xxx_ADC_USE_ADCx' settings to TRUE in your mcuconf.h to use the ADC."
#endif
#if STM32_ADC_DUAL_MODE
# error "STM32 ADC Dual Mode is not supported at this time."
#endif
#if STM32_ADCV3_OVERSAMPLING
# error "STM32 ADCV3 Oversampling is not supported at this time."
#endif
// Otherwise assume V3
#if defined(STM32F0XX) || defined(STM32L0XX)
# define USE_ADCV1
#elif defined(STM32F1XX) || defined(STM32F2XX) || defined(STM32F4XX) || defined(GD32VF103) || defined(WB32F3G71xx) || defined(WB32FQ95xx)
# define USE_ADCV2
#endif
// BODGE to make v2 look like v1,3 and 4
#if defined(USE_ADCV2) || defined(RP2040)
# if !defined(ADC_SMPR_SMP_1P5) && defined(ADC_SAMPLE_3)
# define ADC_SMPR_SMP_1P5 ADC_SAMPLE_3
# define ADC_SMPR_SMP_7P5 ADC_SAMPLE_15
# define ADC_SMPR_SMP_13P5 ADC_SAMPLE_28
# define ADC_SMPR_SMP_28P5 ADC_SAMPLE_56
# define ADC_SMPR_SMP_41P5 ADC_SAMPLE_84
# define ADC_SMPR_SMP_55P5 ADC_SAMPLE_112
# define ADC_SMPR_SMP_71P5 ADC_SAMPLE_144
# define ADC_SMPR_SMP_239P5 ADC_SAMPLE_480
# endif
# if !defined(ADC_SMPR_SMP_1P5) && defined(ADC_SAMPLE_1P5)
# define ADC_SMPR_SMP_1P5 ADC_SAMPLE_1P5
# define ADC_SMPR_SMP_7P5 ADC_SAMPLE_7P5
# define ADC_SMPR_SMP_13P5 ADC_SAMPLE_13P5
# define ADC_SMPR_SMP_28P5 ADC_SAMPLE_28P5
# define ADC_SMPR_SMP_41P5 ADC_SAMPLE_41P5
# define ADC_SMPR_SMP_55P5 ADC_SAMPLE_55P5
# define ADC_SMPR_SMP_71P5 ADC_SAMPLE_71P5
# define ADC_SMPR_SMP_239P5 ADC_SAMPLE_239P5
# endif
// we still sample at 12bit, but scale down to the requested bit range
# define ADC_CFGR1_RES_12BIT 12
# define ADC_CFGR1_RES_10BIT 10
# define ADC_CFGR1_RES_8BIT 8
# define ADC_CFGR1_RES_6BIT 6
#endif
/* User configurable ADC options */
#ifndef ADC_COUNT
# if defined(RP2040) || defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F4XX) || defined(GD32VF103) || defined(WB32F3G71xx) || defined(WB32FQ95xx)
# define ADC_COUNT 1
# elif defined(STM32F3XX)
# define ADC_COUNT 4
# else
# error "ADC_COUNT has not been set for this ARM microcontroller."
# endif
#endif
#ifndef ADC_NUM_CHANNELS
# define ADC_NUM_CHANNELS 1
#elif ADC_NUM_CHANNELS != 1
# error "The ARM ADC implementation currently only supports reading one channel at a time."
#endif
#ifndef ADC_BUFFER_DEPTH
# define ADC_BUFFER_DEPTH 1
#endif
// For more sampling rate options, look at hal_adc_lld.h in ChibiOS
#ifndef ADC_SAMPLING_RATE
# define ADC_SAMPLING_RATE ADC_SMPR_SMP_1P5
#endif
// Options are 12, 10, 8, and 6 bit.
#ifndef ADC_RESOLUTION
# ifdef ADC_CFGR_RES_10BITS // ADCv3, ADCv4
# define ADC_RESOLUTION ADC_CFGR_RES_10BITS
# else // ADCv1, ADCv5, or the bodge for ADCv2 above
# define ADC_RESOLUTION ADC_CFGR1_RES_10BIT
# endif
#endif
static ADCConfig adcCfg = {};
static adcsample_t sampleBuffer[ADC_NUM_CHANNELS * ADC_BUFFER_DEPTH];
// Initialize to max number of ADCs, set to empty object to initialize all to false.
static bool adcInitialized[ADC_COUNT] = {};
// TODO: add back TR handling???
static ADCConversionGroup adcConversionGroup = {
.circular = FALSE,
.num_channels = (uint16_t)(ADC_NUM_CHANNELS),
#if defined(USE_ADCV1)
.cfgr1 = ADC_CFGR1_CONT | ADC_RESOLUTION,
.smpr = ADC_SAMPLING_RATE,
#elif defined(USE_ADCV2)
# if !defined(STM32F1XX) && !defined(GD32VF103) && !defined(WB32F3G71xx) && !defined(WB32FQ95xx)
.cr2 = ADC_CR2_SWSTART, // F103 seem very unhappy with, F401 seems very unhappy without...
# endif
.smpr2 = ADC_SMPR2_SMP_AN0(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN1(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN2(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN3(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN4(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN5(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN6(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN7(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN8(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN9(ADC_SAMPLING_RATE),
.smpr1 = ADC_SMPR1_SMP_AN10(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN11(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN12(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN13(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN14(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN15(ADC_SAMPLING_RATE),
#elif defined(RP2040)
// RP2040 does not have any extra config here
#else
.cfgr = ADC_CFGR_CONT | ADC_RESOLUTION,
.smpr = {ADC_SMPR1_SMP_AN0(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN1(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN2(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN3(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN4(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN5(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN6(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN7(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN8(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN9(ADC_SAMPLING_RATE), ADC_SMPR2_SMP_AN10(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN11(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN12(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN13(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN14(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN15(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN16(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN17(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN18(ADC_SAMPLING_RATE)},
#endif
};
// clang-format off
__attribute__((weak)) adc_mux pinToMux(pin_t pin) {
switch (pin) {
#if defined(STM32F0XX)
case A0: return TO_MUX( 0, 0 );
case A1: return TO_MUX( 1, 0 );
case A2: return TO_MUX( 2, 0 );
case A3: return TO_MUX( 3, 0 );
case A4: return TO_MUX( 4, 0 );
case A5: return TO_MUX( 5, 0 );
case A6: return TO_MUX( 6, 0 );
case A7: return TO_MUX( 7, 0 );
case B0: return TO_MUX( 8, 0 );
case B1: return TO_MUX( 9, 0 );
case C0: return TO_MUX( 10, 0 );
case C1: return TO_MUX( 11, 0 );
case C2: return TO_MUX( 12, 0 );
case C3: return TO_MUX( 13, 0 );
case C4: return TO_MUX( 14, 0 );
case C5: return TO_MUX( 15, 0 );
#elif defined(STM32F3XX)
case A0: return TO_MUX( ADC_CHANNEL_IN1, 0 );
case A1: return TO_MUX( ADC_CHANNEL_IN2, 0 );
case A2: return TO_MUX( ADC_CHANNEL_IN3, 0 );
case A3: return TO_MUX( ADC_CHANNEL_IN4, 0 );
case A4: return TO_MUX( ADC_CHANNEL_IN1, 1 );
case A5: return TO_MUX( ADC_CHANNEL_IN2, 1 );
case A6: return TO_MUX( ADC_CHANNEL_IN3, 1 );
case A7: return TO_MUX( ADC_CHANNEL_IN4, 1 );
case B0: return TO_MUX( ADC_CHANNEL_IN12, 2 );
case B1: return TO_MUX( ADC_CHANNEL_IN1, 2 );
case B2: return TO_MUX( ADC_CHANNEL_IN12, 1 );
case B12: return TO_MUX( ADC_CHANNEL_IN3, 3 );
case B13: return TO_MUX( ADC_CHANNEL_IN5, 2 );
case B14: return TO_MUX( ADC_CHANNEL_IN4, 3 );
case B15: return TO_MUX( ADC_CHANNEL_IN5, 3 );
case C0: return TO_MUX( ADC_CHANNEL_IN6, 0 ); // Can also be ADC2
case C1: return TO_MUX( ADC_CHANNEL_IN7, 0 ); // Can also be ADC2
case C2: return TO_MUX( ADC_CHANNEL_IN8, 0 ); // Can also be ADC2
case C3: return TO_MUX( ADC_CHANNEL_IN9, 0 ); // Can also be ADC2
case C4: return TO_MUX( ADC_CHANNEL_IN5, 1 );
case C5: return TO_MUX( ADC_CHANNEL_IN11, 1 );
case D8: return TO_MUX( ADC_CHANNEL_IN12, 3 );
case D9: return TO_MUX( ADC_CHANNEL_IN13, 3 );
case D10: return TO_MUX( ADC_CHANNEL_IN7, 2 ); // Can also be ADC4
case D11: return TO_MUX( ADC_CHANNEL_IN8, 2 ); // Can also be ADC4
case D12: return TO_MUX( ADC_CHANNEL_IN9, 2 ); // Can also be ADC4
case D13: return TO_MUX( ADC_CHANNEL_IN10, 2 ); // Can also be ADC4
case D14: return TO_MUX( ADC_CHANNEL_IN11, 2 ); // Can also be ADC4
case E7: return TO_MUX( ADC_CHANNEL_IN13, 2 );
case E8: return TO_MUX( ADC_CHANNEL_IN6, 2 ); // Can also be ADC4
case E9: return TO_MUX( ADC_CHANNEL_IN2, 2 );
case E10: return TO_MUX( ADC_CHANNEL_IN14, 2 );
case E11: return TO_MUX( ADC_CHANNEL_IN15, 2 );
case E12: return TO_MUX( ADC_CHANNEL_IN16, 2 );
case E13: return TO_MUX( ADC_CHANNEL_IN3, 2 );
case E14: return TO_MUX( ADC_CHANNEL_IN1, 3 );
case E15: return TO_MUX( ADC_CHANNEL_IN2, 3 );
case F2: return TO_MUX( ADC_CHANNEL_IN10, 0 ); // Can also be ADC2
case F4: return TO_MUX( ADC_CHANNEL_IN5, 0 );
#elif defined(STM32F4XX)
case A0: return TO_MUX( ADC_CHANNEL_IN0, 0 );
case A1: return TO_MUX( ADC_CHANNEL_IN1, 0 );
case A2: return TO_MUX( ADC_CHANNEL_IN2, 0 );
case A3: return TO_MUX( ADC_CHANNEL_IN3, 0 );
case A4: return TO_MUX( ADC_CHANNEL_IN4, 0 );
case A5: return TO_MUX( ADC_CHANNEL_IN5, 0 );
case A6: return TO_MUX( ADC_CHANNEL_IN6, 0 );
case A7: return TO_MUX( ADC_CHANNEL_IN7, 0 );
case B0: return TO_MUX( ADC_CHANNEL_IN8, 0 );
case B1: return TO_MUX( ADC_CHANNEL_IN9, 0 );
case C0: return TO_MUX( ADC_CHANNEL_IN10, 0 );
case C1: return TO_MUX( ADC_CHANNEL_IN11, 0 );
case C2: return TO_MUX( ADC_CHANNEL_IN12, 0 );
case C3: return TO_MUX( ADC_CHANNEL_IN13, 0 );
case C4: return TO_MUX( ADC_CHANNEL_IN14, 0 );
case C5: return TO_MUX( ADC_CHANNEL_IN15, 0 );
# if STM32_ADC_USE_ADC3
case F3: return TO_MUX( ADC_CHANNEL_IN9, 2 );
case F4: return TO_MUX( ADC_CHANNEL_IN14, 2 );
case F5: return TO_MUX( ADC_CHANNEL_IN15, 2 );
case F6: return TO_MUX( ADC_CHANNEL_IN4, 2 );
case F7: return TO_MUX( ADC_CHANNEL_IN5, 2 );
case F8: return TO_MUX( ADC_CHANNEL_IN6, 2 );
case F9: return TO_MUX( ADC_CHANNEL_IN7, 2 );
case F10: return TO_MUX( ADC_CHANNEL_IN8, 2 );
# endif
#elif defined(STM32F1XX) || defined(GD32VF103) || defined(WB32F3G71xx) || defined(WB32FQ95xx)
case A0: return TO_MUX( ADC_CHANNEL_IN0, 0 );
case A1: return TO_MUX( ADC_CHANNEL_IN1, 0 );
case A2: return TO_MUX( ADC_CHANNEL_IN2, 0 );
case A3: return TO_MUX( ADC_CHANNEL_IN3, 0 );
case A4: return TO_MUX( ADC_CHANNEL_IN4, 0 );
case A5: return TO_MUX( ADC_CHANNEL_IN5, 0 );
case A6: return TO_MUX( ADC_CHANNEL_IN6, 0 );
case A7: return TO_MUX( ADC_CHANNEL_IN7, 0 );
case B0: return TO_MUX( ADC_CHANNEL_IN8, 0 );
case B1: return TO_MUX( ADC_CHANNEL_IN9, 0 );
case C0: return TO_MUX( ADC_CHANNEL_IN10, 0 );
case C1: return TO_MUX( ADC_CHANNEL_IN11, 0 );
case C2: return TO_MUX( ADC_CHANNEL_IN12, 0 );
case C3: return TO_MUX( ADC_CHANNEL_IN13, 0 );
case C4: return TO_MUX( ADC_CHANNEL_IN14, 0 );
case C5: return TO_MUX( ADC_CHANNEL_IN15, 0 );
// STM32F103x[C-G] in 144-pin packages also have analog inputs on F6...F10, but they are on ADC3, and the
// ChibiOS ADC driver for STM32F1xx currently supports only ADC1, therefore these pins are not usable.
#elif defined(RP2040)
case 26U: return TO_MUX(0, 0);
case 27U: return TO_MUX(1, 0);
case 28U: return TO_MUX(2, 0);
case 29U: return TO_MUX(3, 0);
#endif
}
// return an adc that would never be used so intToADCDriver will bail out
return TO_MUX(0, 0xFF);
}
// clang-format on
static inline ADCDriver* intToADCDriver(uint8_t adcInt) {
switch (adcInt) {
#if RP_ADC_USE_ADC1 || STM32_ADC_USE_ADC1 || WB32_ADC_USE_ADC1
case 0:
return &ADCD1;
#endif
#if STM32_ADC_USE_ADC2
case 1:
return &ADCD2;
#endif
#if STM32_ADC_USE_ADC3
case 2:
return &ADCD3;
#endif
#if STM32_ADC_USE_ADC4
case 3:
return &ADCD4;
#endif
}
return NULL;
}
static inline void manageAdcInitializationDriver(uint8_t adc, ADCDriver* adcDriver) {
if (!adcInitialized[adc]) {
adcStart(adcDriver, &adcCfg);
adcInitialized[adc] = true;
}
}
int16_t analogReadPin(pin_t pin) {
palSetLineMode(pin, PAL_MODE_INPUT_ANALOG);
return adc_read(pinToMux(pin));
}
int16_t analogReadPinAdc(pin_t pin, uint8_t adc) {
palSetLineMode(pin, PAL_MODE_INPUT_ANALOG);
adc_mux target = pinToMux(pin);
target.adc = adc;
return adc_read(target);
}
int16_t adc_read(adc_mux mux) {
#if defined(USE_ADCV1)
// TODO: fix previous assumption of only 1 input...
adcConversionGroup.chselr = 1 << mux.input; /*no macro to convert N to ADC_CHSELR_CHSEL1*/
#elif defined(USE_ADCV2)
adcConversionGroup.sqr3 = ADC_SQR3_SQ1_N(mux.input);
#elif defined(RP2040)
adcConversionGroup.channel_mask = 1 << mux.input;
#else
adcConversionGroup.sqr[0] = ADC_SQR1_SQ1_N(mux.input);
#endif
ADCDriver* targetDriver = intToADCDriver(mux.adc);
if (!targetDriver) {
return 0;
}
manageAdcInitializationDriver(mux.adc, targetDriver);
if (adcConvert(targetDriver, &adcConversionGroup, &sampleBuffer[0], ADC_BUFFER_DEPTH) != MSG_OK) {
return 0;
}
#if defined(USE_ADCV2) || defined(RP2040)
// fake 12-bit -> N-bit scale
return (*sampleBuffer) >> (12 - ADC_RESOLUTION);
#else
// already handled as part of adcConvert
return *sampleBuffer;
#endif
}
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