2014-03-24 17:49:23 +00:00
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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 "misc.h"
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#include "nlr.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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2014-03-26 22:46:03 +00:00
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#include "runtime.h"
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2014-03-24 17:49:23 +00:00
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#include "adc.h"
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#include "pin.h"
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#include "build/pins.h"
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2014-04-15 19:52:56 +01:00
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#include "timer.h"
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2014-03-24 17:49:23 +00:00
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// Usage Model:
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//
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// adc = pyb.ADC(pin)
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// val = adc.read()
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//
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// adc = pyb.ADC_all(resolution)
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// val = adc.read_channel(channel)
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// val = adc.read_core_temp()
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// val = adc.read_core_vbat()
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// val = adc.read_core_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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2014-03-24 19:27:13 +00:00
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uint32_t adc_read_channel(ADC_HandleTypeDef *adcHandle) {
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2014-03-24 17:49:23 +00:00
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uint32_t rawValue = 0;
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HAL_ADC_Start(adcHandle);
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2014-03-24 19:27:13 +00:00
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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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2014-03-24 17:49:23 +00:00
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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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2014-03-24 19:27:13 +00:00
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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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2014-03-24 17:49:23 +00:00
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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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2014-03-24 19:27:13 +00:00
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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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2014-03-30 13:35:08 +01:00
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mp_check_nargs(n_args, 1, 1, n_kw, false);
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2014-03-24 17:49:23 +00:00
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2014-03-24 19:27:13 +00:00
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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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2014-03-24 17:49:23 +00:00
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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_map_user_obj(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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2014-04-05 18:32:08 +01:00
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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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2014-03-24 17:49:23 +00:00
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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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2014-04-05 18:32:08 +01:00
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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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2014-03-24 17:49:23 +00:00
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}
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if (pin_adc1[channel] == NULL) {
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2014-04-05 18:32:08 +01:00
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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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2014-03-24 17:49:23 +00:00
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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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2014-03-24 19:27:13 +00:00
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o->base.type = &pyb_adc_type;
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2014-03-24 17:49:23 +00:00
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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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2014-03-24 19:27:13 +00:00
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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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2014-04-15 19:52:56 +01:00
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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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buffer_info_t bufinfo;
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mp_get_buffer_raise(buf_in, &bufinfo);
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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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// TODO use DMA
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for (uint i = 0; i < bufinfo.len; i++) {
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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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((byte*)bufinfo.buf)[i] = adc_read_channel(&self->handle) >> 4;
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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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2014-03-26 21:47:19 +00:00
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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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2014-04-15 19:52:56 +01:00
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read_timed), (mp_obj_t)&adc_read_timed_obj},
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2014-03-24 19:27:13 +00:00
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};
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2014-03-26 21:47:19 +00:00
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STATIC MP_DEFINE_CONST_DICT(adc_locals_dict, adc_locals_dict_table);
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2014-03-24 19:27:13 +00:00
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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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2014-03-26 21:47:19 +00:00
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.locals_dict = (mp_obj_t)&adc_locals_dict,
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2014-03-24 19:27:13 +00:00
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};
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2014-03-24 17:49:23 +00:00
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/******************************************************************************/
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/* adc all object */
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typedef struct _pyb_obj_adc_all_t {
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mp_obj_base_t base;
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ADC_HandleTypeDef handle;
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} pyb_obj_adc_all_t;
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void adc_init_all(pyb_obj_adc_all_t *adc_all, uint32_t resolution) {
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switch (resolution) {
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2014-03-25 06:23:09 +00:00
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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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2014-03-24 17:49:23 +00:00
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default:
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2014-04-05 18:32:08 +01:00
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
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2014-03-24 17:49:23 +00:00
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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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2014-03-24 19:27:13 +00:00
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uint32_t adc_config_and_read_channel(ADC_HandleTypeDef *adcHandle, uint32_t channel) {
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2014-03-24 17:49:23 +00:00
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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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2014-03-25 06:23:09 +00:00
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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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2014-03-24 19:27:13 +00:00
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int adc_read_core_temp(ADC_HandleTypeDef *adcHandle) {
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2014-03-24 17:49:23 +00:00
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int32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_TEMPSENSOR);
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2014-03-25 06:23:09 +00:00
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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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2014-03-24 17:49:23 +00:00
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return ((raw_value - CORE_TEMP_V25) / CORE_TEMP_AVG_SLOPE) + 25;
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}
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2014-03-24 19:27:13 +00:00
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float adc_read_core_vbat(ADC_HandleTypeDef *adcHandle) {
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2014-03-24 17:49:23 +00:00
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uint32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_VBAT);
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2014-03-25 06:23:09 +00:00
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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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2014-03-24 17:49:23 +00:00
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return raw_value * VBAT_DIV / 4096.0f * 3.3f;
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}
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2014-03-24 19:27:13 +00:00
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float adc_read_core_vref(ADC_HandleTypeDef *adcHandle) {
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2014-03-24 17:49:23 +00:00
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uint32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_VREFINT);
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2014-03-25 06:23:09 +00:00
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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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2014-03-24 17:49:23 +00:00
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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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2014-03-24 19:27:13 +00:00
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STATIC void adc_all_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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2014-03-24 17:49:23 +00:00
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print(env, "<ADC all>");
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}
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2014-03-24 19:27:13 +00:00
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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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2014-03-24 17:49:23 +00:00
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pyb_obj_adc_all_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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2014-03-24 19:27:13 +00:00
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STATIC mp_obj_t adc_all_read_core_temp(mp_obj_t self_in) {
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2014-03-24 17:49:23 +00:00
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pyb_obj_adc_all_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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2014-03-24 19:27:13 +00:00
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STATIC mp_obj_t adc_all_read_core_vbat(mp_obj_t self_in) {
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2014-03-24 17:49:23 +00:00
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pyb_obj_adc_all_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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2014-03-24 19:27:13 +00:00
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STATIC mp_obj_t adc_all_read_core_vref(mp_obj_t self_in) {
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2014-03-24 17:49:23 +00:00
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pyb_obj_adc_all_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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2014-03-24 19:27:13 +00:00
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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_DEFINE_CONST_FUN_OBJ_1(adc_all_read_core_temp_obj, adc_all_read_core_temp);
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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_DEFINE_CONST_FUN_OBJ_1(adc_all_read_core_vref_obj, adc_all_read_core_vref);
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2014-03-24 17:49:23 +00:00
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2014-03-26 21:47:19 +00:00
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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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2014-03-24 17:49:23 +00:00
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};
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2014-03-26 21:47:19 +00:00
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STATIC MP_DEFINE_CONST_DICT(adc_all_locals_dict, adc_all_locals_dict_table);
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2014-03-24 19:27:13 +00:00
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STATIC const mp_obj_type_t adc_all_type = {
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2014-03-24 17:49:23 +00:00
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{ &mp_type_type },
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.name = MP_QSTR_ADC,
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.print = adc_all_print,
|
2014-03-26 21:47:19 +00:00
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.locals_dict = (mp_obj_t)&adc_all_locals_dict,
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2014-03-24 17:49:23 +00:00
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};
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2014-03-24 19:27:13 +00:00
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STATIC mp_obj_t pyb_ADC_all(mp_obj_t resolution) {
|
2014-03-24 17:49:23 +00:00
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pyb_obj_adc_all_t *o = m_new_obj(pyb_obj_adc_all_t);
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o->base.type = &adc_all_type;
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adc_init_all(o, mp_obj_get_int(resolution));
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return o;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(pyb_ADC_all_obj, pyb_ADC_all);
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