323 lines
10 KiB
C
323 lines
10 KiB
C
#include <stdio.h>
|
|
#include <stm32f4xx_hal.h>
|
|
#include <string.h>
|
|
|
|
#include "misc.h"
|
|
#include "nlr.h"
|
|
#include "mpconfig.h"
|
|
#include "qstr.h"
|
|
#include "obj.h"
|
|
#include "adc.h"
|
|
#include "pin.h"
|
|
#include "build/pins.h"
|
|
|
|
// Usage Model:
|
|
//
|
|
// adc = pyb.ADC(pin)
|
|
// val = adc.read()
|
|
//
|
|
// adc = pyb.ADC_all(resolution)
|
|
// val = adc.read_channel(channel)
|
|
// val = adc.read_core_temp()
|
|
// val = adc.read_core_vbat()
|
|
// val = adc.read_core_vref()
|
|
|
|
/* ADC defintions */
|
|
#define ADCx (ADC1)
|
|
#define ADCx_CLK_ENABLE __ADC1_CLK_ENABLE
|
|
#define ADC_NUM_CHANNELS (19)
|
|
#define ADC_NUM_GPIO_CHANNELS (16)
|
|
|
|
#if defined(STM32F405xx) || defined(STM32F415xx) || \
|
|
defined(STM32F407xx) || defined(STM32F417xx) || \
|
|
defined(STM32F401xC) || defined(STM32F401xE)
|
|
#define VBAT_DIV (2)
|
|
#elif defined(STM32F427xx) || defined(STM32F429xx) || \
|
|
defined(STM32F437xx) || defined(STM32F439xx)
|
|
#define VBAT_DIV (4)
|
|
#endif
|
|
|
|
/* Core temperature sensor definitions */
|
|
#define CORE_TEMP_V25 (943) /* (0.76v/3.3v)*(2^ADC resoultion) */
|
|
#define CORE_TEMP_AVG_SLOPE (3) /* (2.5mv/3.3v)*(2^ADC resoultion) */
|
|
|
|
typedef struct _pyb_obj_adc_t {
|
|
mp_obj_base_t base;
|
|
mp_obj_t pin_name;
|
|
int channel;
|
|
ADC_HandleTypeDef handle;
|
|
} pyb_obj_adc_t;
|
|
|
|
void adc_init_single(pyb_obj_adc_t *adc_obj) {
|
|
if (!IS_ADC_CHANNEL(adc_obj->channel)) {
|
|
return;
|
|
}
|
|
|
|
if (adc_obj->channel < ADC_NUM_GPIO_CHANNELS) {
|
|
// Channels 0-16 correspond to real pins. Configure the GPIO pin in
|
|
// ADC mode.
|
|
const pin_obj_t *pin = pin_adc1[adc_obj->channel];
|
|
GPIO_InitTypeDef GPIO_InitStructure;
|
|
GPIO_InitStructure.Pin = pin->pin_mask;
|
|
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
|
|
GPIO_InitStructure.Pull = GPIO_NOPULL;
|
|
HAL_GPIO_Init(pin->gpio, &GPIO_InitStructure);
|
|
}
|
|
|
|
ADCx_CLK_ENABLE();
|
|
|
|
ADC_HandleTypeDef *adcHandle = &adc_obj->handle;
|
|
adcHandle->Instance = ADCx;
|
|
adcHandle->Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
|
|
adcHandle->Init.Resolution = ADC_RESOLUTION12b;
|
|
adcHandle->Init.ScanConvMode = DISABLE;
|
|
adcHandle->Init.ContinuousConvMode = DISABLE;
|
|
adcHandle->Init.DiscontinuousConvMode = DISABLE;
|
|
adcHandle->Init.NbrOfDiscConversion = 0;
|
|
adcHandle->Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
|
|
adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
|
|
adcHandle->Init.DataAlign = ADC_DATAALIGN_RIGHT;
|
|
adcHandle->Init.NbrOfConversion = 1;
|
|
adcHandle->Init.DMAContinuousRequests = DISABLE;
|
|
adcHandle->Init.EOCSelection = DISABLE;
|
|
|
|
HAL_ADC_Init(adcHandle);
|
|
|
|
ADC_ChannelConfTypeDef sConfig;
|
|
|
|
sConfig.Channel = adc_obj->channel;
|
|
sConfig.Rank = 1;
|
|
sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
|
|
sConfig.Offset = 0;
|
|
|
|
HAL_ADC_ConfigChannel(adcHandle, &sConfig);
|
|
}
|
|
|
|
uint32_t adc_read_channel(ADC_HandleTypeDef *adcHandle)
|
|
{
|
|
uint32_t rawValue = 0;
|
|
|
|
HAL_ADC_Start(adcHandle);
|
|
if (HAL_ADC_PollForConversion(adcHandle, 10) == HAL_OK) \
|
|
&& HAL_ADC_GetState(adcHandle) == HAL_ADC_STATE_EOC_REG) {
|
|
rawValue = HAL_ADC_GetValue(adcHandle);
|
|
}
|
|
HAL_ADC_Stop(adcHandle);
|
|
|
|
return rawValue;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
/* Micro Python bindings : adc object (single channel) */
|
|
|
|
static void adc_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
pyb_obj_adc_t *self = self_in;
|
|
print(env, "<ADC on ");
|
|
mp_obj_print_helper(print, env, self->pin_name, PRINT_STR);
|
|
print(env, " channel=%lu>", self->channel);
|
|
}
|
|
|
|
static mp_obj_t adc_read(mp_obj_t self_in) {
|
|
pyb_obj_adc_t *self = self_in;
|
|
|
|
uint32_t data = adc_read_channel(&self->handle);
|
|
return mp_obj_new_int(data);
|
|
}
|
|
|
|
static MP_DEFINE_CONST_FUN_OBJ_1(adc_read_obj, adc_read);
|
|
|
|
static const mp_method_t adc_methods[] = {
|
|
{ "read", &adc_read_obj},
|
|
{ NULL, NULL },
|
|
};
|
|
|
|
static const mp_obj_type_t adc_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_ADC,
|
|
.print = adc_print,
|
|
.methods = adc_methods,
|
|
};
|
|
|
|
mp_obj_t pyb_ADC(mp_obj_t pin_obj) {
|
|
|
|
uint32_t channel;
|
|
|
|
if (MP_OBJ_IS_INT(pin_obj)) {
|
|
channel = mp_obj_get_int(pin_obj);
|
|
} else {
|
|
const pin_obj_t *pin = pin_map_user_obj(pin_obj);
|
|
if ((pin->adc_num & PIN_ADC1) == 0) {
|
|
// No ADC1 function on that pin
|
|
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin %s does not have ADC capabilities", pin->name));
|
|
}
|
|
channel = pin->adc_channel;
|
|
}
|
|
|
|
if (!IS_ADC_CHANNEL(channel)) {
|
|
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Not a valid ADC Channel: %d", channel));
|
|
}
|
|
if (pin_adc1[channel] == NULL) {
|
|
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Channel %d not available on this board", channel));
|
|
}
|
|
|
|
pyb_obj_adc_t *o = m_new_obj(pyb_obj_adc_t);
|
|
memset(o, 0, sizeof(*o));
|
|
o->base.type = &adc_type;
|
|
o->pin_name = pin_obj;
|
|
o->channel = channel;
|
|
adc_init_single(o);
|
|
|
|
return o;
|
|
}
|
|
|
|
MP_DEFINE_CONST_FUN_OBJ_1(pyb_ADC_obj, pyb_ADC);
|
|
|
|
/******************************************************************************/
|
|
/* adc all object */
|
|
|
|
typedef struct _pyb_obj_adc_all_t {
|
|
mp_obj_base_t base;
|
|
ADC_HandleTypeDef handle;
|
|
} pyb_obj_adc_all_t;
|
|
|
|
void adc_init_all(pyb_obj_adc_all_t *adc_all, uint32_t resolution) {
|
|
|
|
switch (resolution) {
|
|
case 6: resolution = ADC_RESOLUTION6b; break;
|
|
case 8: resolution = ADC_RESOLUTION8b; break;
|
|
case 10: resolution = ADC_RESOLUTION10b; break;
|
|
case 12: resolution = ADC_RESOLUTION12b; break;
|
|
default:
|
|
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
|
|
"resolution %d not supported", resolution));
|
|
}
|
|
|
|
for (uint32_t channel = 0; channel < ADC_NUM_GPIO_CHANNELS; channel++) {
|
|
// Channels 0-16 correspond to real pins. Configure the GPIO pin in
|
|
// ADC mode.
|
|
const pin_obj_t *pin = pin_adc1[channel];
|
|
GPIO_InitTypeDef GPIO_InitStructure;
|
|
GPIO_InitStructure.Pin = pin->pin_mask;
|
|
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
|
|
GPIO_InitStructure.Pull = GPIO_NOPULL;
|
|
HAL_GPIO_Init(pin->gpio, &GPIO_InitStructure);
|
|
}
|
|
|
|
ADCx_CLK_ENABLE();
|
|
|
|
ADC_HandleTypeDef *adcHandle = &adc_all->handle;
|
|
adcHandle->Instance = ADCx;
|
|
adcHandle->Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
|
|
adcHandle->Init.Resolution = resolution;
|
|
adcHandle->Init.ScanConvMode = DISABLE;
|
|
adcHandle->Init.ContinuousConvMode = DISABLE;
|
|
adcHandle->Init.DiscontinuousConvMode = DISABLE;
|
|
adcHandle->Init.NbrOfDiscConversion = 0;
|
|
adcHandle->Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
|
|
adcHandle->Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
|
|
adcHandle->Init.DataAlign = ADC_DATAALIGN_RIGHT;
|
|
adcHandle->Init.NbrOfConversion = 1;
|
|
adcHandle->Init.DMAContinuousRequests = DISABLE;
|
|
adcHandle->Init.EOCSelection = DISABLE;
|
|
|
|
HAL_ADC_Init(adcHandle);
|
|
}
|
|
|
|
uint32_t adc_config_and_read_channel(ADC_HandleTypeDef *adcHandle, uint32_t channel)
|
|
{
|
|
ADC_ChannelConfTypeDef sConfig;
|
|
sConfig.Channel = channel;
|
|
sConfig.Rank = 1;
|
|
sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
|
|
sConfig.Offset = 0;
|
|
HAL_ADC_ConfigChannel(adcHandle, &sConfig);
|
|
|
|
return adc_read_channel(adcHandle);
|
|
}
|
|
|
|
int adc_read_core_temp(ADC_HandleTypeDef *adcHandle)
|
|
{
|
|
int32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_TEMPSENSOR);
|
|
|
|
return ((raw_value - CORE_TEMP_V25) / CORE_TEMP_AVG_SLOPE) + 25;
|
|
}
|
|
|
|
float adc_read_core_vbat(ADC_HandleTypeDef *adcHandle)
|
|
{
|
|
uint32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_VBAT);
|
|
|
|
return raw_value * VBAT_DIV / 4096.0f * 3.3f;
|
|
}
|
|
|
|
float adc_read_core_vref(ADC_HandleTypeDef *adcHandle)
|
|
{
|
|
uint32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_VREFINT);
|
|
|
|
return raw_value * VBAT_DIV / 4096.0f * 3.3f;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
/* Micro Python bindings : adc_all object */
|
|
|
|
static void adc_all_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
print(env, "<ADC all>");
|
|
}
|
|
|
|
static mp_obj_t adc_all_read_channel(mp_obj_t self_in, mp_obj_t channel) {
|
|
pyb_obj_adc_all_t *self = self_in;
|
|
|
|
uint32_t chan = mp_obj_get_int(channel);
|
|
uint32_t data = adc_config_and_read_channel(&self->handle, chan);
|
|
return mp_obj_new_int(data);
|
|
}
|
|
|
|
static mp_obj_t adc_all_read_core_temp(mp_obj_t self_in) {
|
|
pyb_obj_adc_all_t *self = self_in;
|
|
|
|
int data = adc_read_core_temp(&self->handle);
|
|
return mp_obj_new_int(data);
|
|
}
|
|
|
|
static mp_obj_t adc_all_read_core_vbat(mp_obj_t self_in) {
|
|
pyb_obj_adc_all_t *self = self_in;
|
|
|
|
float data = adc_read_core_vbat(&self->handle);
|
|
return mp_obj_new_float(data);
|
|
}
|
|
|
|
static mp_obj_t adc_all_read_core_vref(mp_obj_t self_in) {
|
|
pyb_obj_adc_all_t *self = self_in;
|
|
|
|
float data = adc_read_core_vref(&self->handle);
|
|
return mp_obj_new_float(data);
|
|
}
|
|
|
|
static MP_DEFINE_CONST_FUN_OBJ_2(adc_all_read_channel_obj, adc_all_read_channel);
|
|
static MP_DEFINE_CONST_FUN_OBJ_1(adc_all_read_core_temp_obj, adc_all_read_core_temp);
|
|
static MP_DEFINE_CONST_FUN_OBJ_1(adc_all_read_core_vbat_obj, adc_all_read_core_vbat);
|
|
static MP_DEFINE_CONST_FUN_OBJ_1(adc_all_read_core_vref_obj, adc_all_read_core_vref);
|
|
|
|
static const mp_method_t adc_all_methods[] = {
|
|
{ "read_channel", &adc_all_read_channel_obj},
|
|
{ "read_core_temp", &adc_all_read_core_temp_obj},
|
|
{ "read_core_vbat", &adc_all_read_core_vbat_obj},
|
|
{ "read_core_vref", &adc_all_read_core_vref_obj},
|
|
{ NULL, NULL },
|
|
};
|
|
|
|
static const mp_obj_type_t adc_all_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_ADC,
|
|
.print = adc_all_print,
|
|
.methods = adc_all_methods,
|
|
};
|
|
|
|
mp_obj_t pyb_ADC_all(mp_obj_t resolution) {
|
|
pyb_obj_adc_all_t *o = m_new_obj(pyb_obj_adc_all_t);
|
|
o->base.type = &adc_all_type;
|
|
adc_init_all(o, mp_obj_get_int(resolution));
|
|
return o;
|
|
}
|
|
|
|
MP_DEFINE_CONST_FUN_OBJ_1(pyb_ADC_all_obj, pyb_ADC_all);
|