04b9147e15
Blanket wide to all .c and .h files. Some files originating from ST are difficult to deal with (license wise) so it was left out of those. Also merged modpyb.h, modos.h, modstm.h and modtime.h in stmhal/.
425 lines
15 KiB
C
425 lines
15 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stm32f4xx_hal.h>
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#include <string.h>
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#include "mpconfig.h"
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#include "misc.h"
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#include "nlr.h"
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#include "qstr.h"
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#include "obj.h"
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#include "runtime.h"
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#include "binary.h"
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#include "adc.h"
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#include "pin.h"
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#include "genhdr/pins.h"
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#include "timer.h"
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/// \moduleref pyb
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/// \class ADC - analog to digital conversion: read analog values on a pin
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///
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/// Usage:
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///
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/// adc = pyb.ADC(pin) # create an analog object from a pin
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/// val = adc.read() # read an analog value
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///
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/// adc = pyb.ADCAll(resolution) # creale an ADCAll object
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/// val = adc.read_channel(channel) # read the given channel
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/// val = adc.read_core_temp() # read MCU temperature
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/// val = adc.read_core_vbat() # read MCU VBAT
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/// val = adc.read_core_vref() # read MCU VREF
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/* ADC defintions */
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#define ADCx (ADC1)
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#define ADCx_CLK_ENABLE __ADC1_CLK_ENABLE
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#define ADC_NUM_CHANNELS (19)
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#define ADC_NUM_GPIO_CHANNELS (16)
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#if defined(STM32F405xx) || defined(STM32F415xx) || \
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defined(STM32F407xx) || defined(STM32F417xx) || \
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defined(STM32F401xC) || defined(STM32F401xE)
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#define VBAT_DIV (2)
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#elif defined(STM32F427xx) || defined(STM32F429xx) || \
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defined(STM32F437xx) || defined(STM32F439xx)
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#define VBAT_DIV (4)
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#endif
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/* Core temperature sensor definitions */
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#define CORE_TEMP_V25 (943) /* (0.76v/3.3v)*(2^ADC resoultion) */
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#define CORE_TEMP_AVG_SLOPE (3) /* (2.5mv/3.3v)*(2^ADC resoultion) */
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typedef struct _pyb_obj_adc_t {
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mp_obj_base_t base;
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mp_obj_t pin_name;
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int channel;
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ADC_HandleTypeDef handle;
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} pyb_obj_adc_t;
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void adc_init_single(pyb_obj_adc_t *adc_obj) {
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if (!IS_ADC_CHANNEL(adc_obj->channel)) {
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return;
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}
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if (adc_obj->channel < ADC_NUM_GPIO_CHANNELS) {
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// Channels 0-16 correspond to real pins. Configure the GPIO pin in
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// ADC mode.
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const pin_obj_t *pin = pin_adc1[adc_obj->channel];
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.Pin = pin->pin_mask;
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GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(pin->gpio, &GPIO_InitStructure);
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}
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ADCx_CLK_ENABLE();
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ADC_HandleTypeDef *adcHandle = &adc_obj->handle;
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adcHandle->Instance = ADCx;
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adcHandle->Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
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adcHandle->Init.Resolution = ADC_RESOLUTION12b;
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adcHandle->Init.ScanConvMode = DISABLE;
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adcHandle->Init.ContinuousConvMode = DISABLE;
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adcHandle->Init.DiscontinuousConvMode = DISABLE;
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adcHandle->Init.NbrOfDiscConversion = 0;
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adcHandle->Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
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adcHandle->Init.DataAlign = ADC_DATAALIGN_RIGHT;
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adcHandle->Init.NbrOfConversion = 1;
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adcHandle->Init.DMAContinuousRequests = DISABLE;
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adcHandle->Init.EOCSelection = DISABLE;
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HAL_ADC_Init(adcHandle);
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ADC_ChannelConfTypeDef sConfig;
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sConfig.Channel = adc_obj->channel;
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sConfig.Rank = 1;
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sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
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sConfig.Offset = 0;
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HAL_ADC_ConfigChannel(adcHandle, &sConfig);
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}
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uint32_t adc_read_channel(ADC_HandleTypeDef *adcHandle) {
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uint32_t rawValue = 0;
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HAL_ADC_Start(adcHandle);
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if (HAL_ADC_PollForConversion(adcHandle, 10) == HAL_OK && HAL_ADC_GetState(adcHandle) == HAL_ADC_STATE_EOC_REG) {
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rawValue = HAL_ADC_GetValue(adcHandle);
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}
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HAL_ADC_Stop(adcHandle);
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return rawValue;
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}
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/******************************************************************************/
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/* Micro Python bindings : adc object (single channel) */
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STATIC void adc_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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pyb_obj_adc_t *self = self_in;
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print(env, "<ADC on ");
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mp_obj_print_helper(print, env, self->pin_name, PRINT_STR);
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print(env, " channel=%lu>", self->channel);
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}
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/// \classmethod \constructor(pin)
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/// Create an ADC object associated with the given pin.
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/// This allows you to then read analog values on that pin.
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STATIC mp_obj_t adc_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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// check number of arguments
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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// 1st argument is the pin name
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mp_obj_t pin_obj = args[0];
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uint32_t channel;
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if (MP_OBJ_IS_INT(pin_obj)) {
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channel = mp_obj_get_int(pin_obj);
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} else {
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const pin_obj_t *pin = pin_find(pin_obj);
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if ((pin->adc_num & PIN_ADC1) == 0) {
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// No ADC1 function on that pin
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin %s does not have ADC capabilities", pin->name));
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}
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channel = pin->adc_channel;
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}
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if (!IS_ADC_CHANNEL(channel)) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "not a valid ADC Channel: %d", channel));
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}
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if (pin_adc1[channel] == NULL) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "channel %d not available on this board", channel));
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}
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pyb_obj_adc_t *o = m_new_obj(pyb_obj_adc_t);
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memset(o, 0, sizeof(*o));
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o->base.type = &pyb_adc_type;
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o->pin_name = pin_obj;
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o->channel = channel;
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adc_init_single(o);
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return o;
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}
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/// \method read()
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/// Read the value on the analog pin and return it. The returned value
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/// will be between 0 and 4095.
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STATIC mp_obj_t adc_read(mp_obj_t self_in) {
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pyb_obj_adc_t *self = self_in;
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uint32_t data = adc_read_channel(&self->handle);
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return mp_obj_new_int(data);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_read_obj, adc_read);
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/// \method read_timed(buf, freq)
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/// Read analog values into the given buffer at the given frequency.
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///
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/// Example:
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///
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/// adc = pyb.ADC(pyb.Pin.board.X19) # create an ADC on pin X19
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/// buf = bytearray(100) # create a buffer of 100 bytes
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/// adc.read_timed(buf, 10) # read analog values into buf at 10Hz
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/// # this will take 10 seconds to finish
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/// for val in buf: # loop over all values
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/// print(val) # print the value out
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///
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/// This function does not allocate any memory.
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STATIC mp_obj_t adc_read_timed(mp_obj_t self_in, mp_obj_t buf_in, mp_obj_t freq_in) {
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pyb_obj_adc_t *self = self_in;
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(buf_in, &bufinfo, MP_BUFFER_WRITE);
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int typesize = mp_binary_get_size('@', bufinfo.typecode, NULL);
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// Init TIM6 at the required frequency (in Hz)
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timer_tim6_init(mp_obj_get_int(freq_in));
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// Start timer
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HAL_TIM_Base_Start(&TIM6_Handle);
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// This uses the timer in polling mode to do the sampling
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// We could use DMA, but then we can't convert the values correctly for the buffer
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for (uint index = 0; index < bufinfo.len; index++) {
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// Wait for the timer to trigger
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while (__HAL_TIM_GET_FLAG(&TIM6_Handle, TIM_FLAG_UPDATE) == RESET) {
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}
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__HAL_TIM_CLEAR_FLAG(&TIM6_Handle, TIM_FLAG_UPDATE);
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uint value = adc_read_channel(&self->handle);
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if (typesize == 1) {
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value >>= 4;
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}
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mp_binary_set_val_array_from_int(bufinfo.typecode, bufinfo.buf, index, value);
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}
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// Stop timer
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HAL_TIM_Base_Stop(&TIM6_Handle);
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return mp_obj_new_int(bufinfo.len);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_3(adc_read_timed_obj, adc_read_timed);
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STATIC const mp_map_elem_t adc_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&adc_read_obj},
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read_timed), (mp_obj_t)&adc_read_timed_obj},
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};
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STATIC MP_DEFINE_CONST_DICT(adc_locals_dict, adc_locals_dict_table);
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const mp_obj_type_t pyb_adc_type = {
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{ &mp_type_type },
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.name = MP_QSTR_ADC,
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.print = adc_print,
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.make_new = adc_make_new,
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.locals_dict = (mp_obj_t)&adc_locals_dict,
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};
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/******************************************************************************/
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/* adc all object */
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typedef struct _pyb_adc_all_obj_t {
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mp_obj_base_t base;
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ADC_HandleTypeDef handle;
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} pyb_adc_all_obj_t;
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void adc_init_all(pyb_adc_all_obj_t *adc_all, uint32_t resolution) {
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switch (resolution) {
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case 6: resolution = ADC_RESOLUTION6b; break;
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case 8: resolution = ADC_RESOLUTION8b; break;
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case 10: resolution = ADC_RESOLUTION10b; break;
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case 12: resolution = ADC_RESOLUTION12b; break;
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default:
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
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"resolution %d not supported", resolution));
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}
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for (uint32_t channel = 0; channel < ADC_NUM_GPIO_CHANNELS; channel++) {
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// Channels 0-16 correspond to real pins. Configure the GPIO pin in
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// ADC mode.
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const pin_obj_t *pin = pin_adc1[channel];
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.Pin = pin->pin_mask;
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GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(pin->gpio, &GPIO_InitStructure);
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}
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ADCx_CLK_ENABLE();
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ADC_HandleTypeDef *adcHandle = &adc_all->handle;
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adcHandle->Instance = ADCx;
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adcHandle->Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
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adcHandle->Init.Resolution = resolution;
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adcHandle->Init.ScanConvMode = DISABLE;
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adcHandle->Init.ContinuousConvMode = DISABLE;
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adcHandle->Init.DiscontinuousConvMode = DISABLE;
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adcHandle->Init.NbrOfDiscConversion = 0;
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adcHandle->Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
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adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
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adcHandle->Init.DataAlign = ADC_DATAALIGN_RIGHT;
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adcHandle->Init.NbrOfConversion = 1;
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adcHandle->Init.DMAContinuousRequests = DISABLE;
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adcHandle->Init.EOCSelection = DISABLE;
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HAL_ADC_Init(adcHandle);
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}
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uint32_t adc_config_and_read_channel(ADC_HandleTypeDef *adcHandle, uint32_t channel) {
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ADC_ChannelConfTypeDef sConfig;
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sConfig.Channel = channel;
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sConfig.Rank = 1;
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sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
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sConfig.Offset = 0;
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HAL_ADC_ConfigChannel(adcHandle, &sConfig);
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return adc_read_channel(adcHandle);
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}
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int adc_get_resolution(ADC_HandleTypeDef *adcHandle) {
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uint32_t res_reg = __HAL_ADC_GET_RESOLUTION(adcHandle);
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switch (res_reg) {
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case ADC_RESOLUTION6b: return 6;
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case ADC_RESOLUTION8b: return 8;
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case ADC_RESOLUTION10b: return 10;
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}
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return 12;
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}
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int adc_read_core_temp(ADC_HandleTypeDef *adcHandle) {
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int32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_TEMPSENSOR);
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// Note: constants assume 12-bit resolution, so we scale the raw value to
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// be 12-bits.
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raw_value <<= (12 - adc_get_resolution(adcHandle));
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return ((raw_value - CORE_TEMP_V25) / CORE_TEMP_AVG_SLOPE) + 25;
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}
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float adc_read_core_vbat(ADC_HandleTypeDef *adcHandle) {
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uint32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_VBAT);
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// Note: constants assume 12-bit resolution, so we scale the raw value to
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// be 12-bits.
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raw_value <<= (12 - adc_get_resolution(adcHandle));
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return raw_value * VBAT_DIV / 4096.0f * 3.3f;
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}
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float adc_read_core_vref(ADC_HandleTypeDef *adcHandle) {
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uint32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_VREFINT);
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// Note: constants assume 12-bit resolution, so we scale the raw value to
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// be 12-bits.
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raw_value <<= (12 - adc_get_resolution(adcHandle));
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return raw_value * VBAT_DIV / 4096.0f * 3.3f;
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}
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/******************************************************************************/
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/* Micro Python bindings : adc_all object */
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STATIC mp_obj_t adc_all_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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// check number of arguments
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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// make ADCAll object
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pyb_adc_all_obj_t *o = m_new_obj(pyb_adc_all_obj_t);
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o->base.type = &pyb_adc_all_type;
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adc_init_all(o, mp_obj_get_int(args[0])); // args[0] is the resolution
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return o;
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}
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STATIC mp_obj_t adc_all_read_channel(mp_obj_t self_in, mp_obj_t channel) {
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pyb_adc_all_obj_t *self = self_in;
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uint32_t chan = mp_obj_get_int(channel);
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uint32_t data = adc_config_and_read_channel(&self->handle, chan);
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return mp_obj_new_int(data);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(adc_all_read_channel_obj, adc_all_read_channel);
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STATIC mp_obj_t adc_all_read_core_temp(mp_obj_t self_in) {
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pyb_adc_all_obj_t *self = self_in;
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int data = adc_read_core_temp(&self->handle);
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return mp_obj_new_int(data);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_all_read_core_temp_obj, adc_all_read_core_temp);
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STATIC mp_obj_t adc_all_read_core_vbat(mp_obj_t self_in) {
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pyb_adc_all_obj_t *self = self_in;
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float data = adc_read_core_vbat(&self->handle);
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return mp_obj_new_float(data);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_all_read_core_vbat_obj, adc_all_read_core_vbat);
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STATIC mp_obj_t adc_all_read_core_vref(mp_obj_t self_in) {
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pyb_adc_all_obj_t *self = self_in;
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float data = adc_read_core_vref(&self->handle);
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return mp_obj_new_float(data);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_all_read_core_vref_obj, adc_all_read_core_vref);
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STATIC const mp_map_elem_t adc_all_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read_channel), (mp_obj_t)&adc_all_read_channel_obj},
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read_core_temp), (mp_obj_t)&adc_all_read_core_temp_obj},
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read_core_vbat), (mp_obj_t)&adc_all_read_core_vbat_obj},
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read_core_vref), (mp_obj_t)&adc_all_read_core_vref_obj},
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};
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STATIC MP_DEFINE_CONST_DICT(adc_all_locals_dict, adc_all_locals_dict_table);
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const mp_obj_type_t pyb_adc_all_type = {
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{ &mp_type_type },
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.name = MP_QSTR_ADCAll,
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.make_new = adc_all_make_new,
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.locals_dict = (mp_obj_t)&adc_all_locals_dict,
|
|
};
|