mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
134 lines
4.7 KiB
C
134 lines
4.7 KiB
C
// Copyright 2016-2018 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include <esp_types.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "freertos/semphr.h"
|
|
#include "esp_log.h"
|
|
#include "hal/adc_ll.h"
|
|
#include "soc/rtc_cntl_reg.h"
|
|
#include "soc/apb_saradc_struct.h"
|
|
#include "soc/apb_saradc_reg.h"
|
|
#include "soc/system_reg.h"
|
|
#include "driver/temp_sensor.h"
|
|
#include "regi2c_ctrl.h"
|
|
#include "esp32c3/rom/ets_sys.h"
|
|
|
|
static const char *TAG = "tsens";
|
|
|
|
#define TSENS_CHECK(res, ret_val) ({ \
|
|
if (!(res)) { \
|
|
ESP_LOGE(TAG, "%s:%d (%s)", __FILE__, __LINE__, __FUNCTION__); \
|
|
return (ret_val); \
|
|
} \
|
|
})
|
|
#define TSENS_XPD_WAIT_DEFAULT 0xFF /* Set wait cycle time(8MHz) from power up to reset enable. */
|
|
#define TSENS_ADC_FACTOR (0.4386)
|
|
#define TSENS_DAC_FACTOR (27.88)
|
|
#define TSENS_SYS_OFFSET (20.52)
|
|
|
|
typedef struct {
|
|
int index;
|
|
int offset;
|
|
int set_val;
|
|
int range_min;
|
|
int range_max;
|
|
int error_max;
|
|
} tsens_dac_offset_t;
|
|
|
|
static const tsens_dac_offset_t dac_offset[TSENS_DAC_MAX] = {
|
|
/* DAC Offset reg_val min max error */
|
|
{TSENS_DAC_L0, -2, 5, 50, 125, 3},
|
|
{TSENS_DAC_L1, -1, 7, 20, 100, 2},
|
|
{TSENS_DAC_L2, 0, 15, -10, 80, 1},
|
|
{TSENS_DAC_L3, 1, 11, -30, 50, 2},
|
|
{TSENS_DAC_L4, 2, 10, -40, 20, 3},
|
|
};
|
|
|
|
esp_err_t temp_sensor_set_config(temp_sensor_config_t tsens)
|
|
{
|
|
REG_SET_BIT(SYSTEM_PERIP_CLK_EN1_REG, SYSTEM_TSENS_CLK_EN);
|
|
CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, ANA_I2C_SAR_FORCE_PD);
|
|
SET_PERI_REG_MASK(ANA_CONFIG2_REG, ANA_I2C_SAR_FORCE_PU);
|
|
REGI2C_WRITE_MASK(I2C_SAR_ADC, I2C_SARADC_TSENS_DAC, dac_offset[tsens.dac_offset].set_val);
|
|
APB_SARADC.apb_tsens_ctrl.tsens_clk_div = tsens.clk_div;
|
|
APB_SARADC.apb_tsens_ctrl2.tsens_xpd_wait = TSENS_XPD_WAIT_DEFAULT;
|
|
APB_SARADC.apb_tsens_ctrl2.tsens_xpd_force = 1;
|
|
ESP_LOGD(TAG, "Config temperature range [%d°C ~ %d°C], error < %d°C",
|
|
dac_offset[tsens.dac_offset].range_min,
|
|
dac_offset[tsens.dac_offset].range_max,
|
|
dac_offset[tsens.dac_offset].error_max);
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t temp_sensor_get_config(temp_sensor_config_t *tsens)
|
|
{
|
|
TSENS_CHECK(tsens != NULL, ESP_ERR_INVALID_ARG);
|
|
CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, ANA_I2C_SAR_FORCE_PD);
|
|
SET_PERI_REG_MASK(ANA_CONFIG2_REG, ANA_I2C_SAR_FORCE_PU);
|
|
tsens->dac_offset = REGI2C_READ_MASK(I2C_SAR_ADC, I2C_SARADC_TSENS_DAC);
|
|
for (int i = TSENS_DAC_L0; i < TSENS_DAC_MAX; i++) {
|
|
if (tsens->dac_offset == dac_offset[i].set_val) {
|
|
tsens->dac_offset = dac_offset[i].index;
|
|
break;
|
|
}
|
|
}
|
|
tsens->clk_div = APB_SARADC.apb_tsens_ctrl.tsens_clk_div;
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t temp_sensor_start(void)
|
|
{
|
|
REG_SET_BIT(SYSTEM_PERIP_CLK_EN1_REG, SYSTEM_TSENS_CLK_EN);
|
|
APB_SARADC.apb_tsens_ctrl2.tsens_clk_sel = 1;
|
|
APB_SARADC.apb_tsens_ctrl.tsens_pu = 1;
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t temp_sensor_stop(void)
|
|
{
|
|
APB_SARADC.apb_tsens_ctrl.tsens_pu = 0;
|
|
APB_SARADC.apb_tsens_ctrl2.tsens_clk_sel = 0;
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t temp_sensor_read_raw(uint32_t *tsens_out)
|
|
{
|
|
TSENS_CHECK(tsens_out != NULL, ESP_ERR_INVALID_ARG);
|
|
*tsens_out = APB_SARADC.apb_tsens_ctrl.tsens_out;
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t temp_sensor_read_celsius(float *celsius)
|
|
{
|
|
TSENS_CHECK(celsius != NULL, ESP_ERR_INVALID_ARG);
|
|
temp_sensor_config_t tsens;
|
|
uint32_t tsens_out = 0;
|
|
esp_err_t ret = temp_sensor_get_config(&tsens);
|
|
if (ret == ESP_OK) {
|
|
ret = temp_sensor_read_raw(&tsens_out);
|
|
printf("tsens_out %d\r\n", tsens_out);
|
|
TSENS_CHECK(ret == ESP_OK, ret);
|
|
const tsens_dac_offset_t *dac = &dac_offset[tsens.dac_offset];
|
|
*celsius = (TSENS_ADC_FACTOR * (float)tsens_out - TSENS_DAC_FACTOR * dac->offset - TSENS_SYS_OFFSET);
|
|
if (*celsius < dac->range_min || *celsius > dac->range_max) {
|
|
ESP_LOGW(TAG, "Exceeding the temperature range!");
|
|
ret = ESP_ERR_INVALID_STATE;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|