- /* 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 "quantum.h"
- #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 !STM32_ADC_USE_ADC1 && !STM32_ADC_USE_ADC2 && !STM32_ADC_USE_ADC3 && !STM32_ADC_USE_ADC4
- # error "You need to set one of the 'STM32_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)
- # define USE_ADCV2
- #endif
-
- // BODGE to make v2 look like v1,3 and 4
- #ifdef USE_ADCV2
- # 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(STM32F0XX) || defined(STM32F1XX) || defined(STM32F4XX) || defined(GD32VF103)
- # 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)
- .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),
- #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( ADC_CHSELR_CHSEL0, 0 );
- case A1: return TO_MUX( ADC_CHSELR_CHSEL1, 0 );
- case A2: return TO_MUX( ADC_CHSELR_CHSEL2, 0 );
- case A3: return TO_MUX( ADC_CHSELR_CHSEL3, 0 );
- case A4: return TO_MUX( ADC_CHSELR_CHSEL4, 0 );
- case A5: return TO_MUX( ADC_CHSELR_CHSEL5, 0 );
- case A6: return TO_MUX( ADC_CHSELR_CHSEL6, 0 );
- case A7: return TO_MUX( ADC_CHSELR_CHSEL7, 0 );
- case B0: return TO_MUX( ADC_CHSELR_CHSEL8, 0 );
- case B1: return TO_MUX( ADC_CHSELR_CHSEL9, 0 );
- case C0: return TO_MUX( ADC_CHSELR_CHSEL10, 0 );
- case C1: return TO_MUX( ADC_CHSELR_CHSEL11, 0 );
- case C2: return TO_MUX( ADC_CHSELR_CHSEL12, 0 );
- case C3: return TO_MUX( ADC_CHSELR_CHSEL13, 0 );
- case C4: return TO_MUX( ADC_CHSELR_CHSEL14, 0 );
- case C5: return TO_MUX( ADC_CHSELR_CHSEL15, 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)
- 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.
- #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 STM32_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);
- #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;
- }
-
- #ifdef USE_ADCV2
- // 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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