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mythbuster5mythbuster5
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temperature sensor: Add support on ESP32-S3,
Closes #8086
1 parent 322a224 commit daceb35

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11 files changed

+193
-9
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11 files changed

+193
-9
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‎components/driver/CMakeLists.txt

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@@ -67,6 +67,7 @@ if(${target} STREQUAL "esp32s3")
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"spi_slave_hd.c"
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"touch_sensor_common.c"
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"esp32s3/touch_sensor.c"
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"esp32s3/rtc_tempsensor.c"
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)
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endif()
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‎components/driver/esp32c3/rtc_tempsensor.c

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@@ -111,6 +111,7 @@ esp_err_t temp_sensor_stop(void)
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{
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APB_SARADC.apb_tsens_ctrl.tsens_pu = 0;
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APB_SARADC.apb_tsens_ctrl2.tsens_clk_sel = 0;
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tsens_hw_state = TSENS_HW_STATE_CONFIGURED;
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return ESP_OK;
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}
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‎components/driver/esp32h2/rtc_tempsensor.c

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@@ -111,6 +111,7 @@ esp_err_t temp_sensor_stop(void)
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{
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APB_SARADC.apb_tsens_ctrl.tsens_pu = 0;
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APB_SARADC.apb_tsens_ctrl2.tsens_clk_sel = 0;
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tsens_hw_state = TSENS_HW_STATE_CONFIGURED;
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return ESP_OK;
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}
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‎components/driver/esp32s2/rtc_tempsensor.c

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@@ -129,6 +129,7 @@ esp_err_t temp_sensor_stop(void)
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vSemaphoreDelete(rtc_tsens_mux);
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rtc_tsens_mux = NULL;
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}
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tsens_hw_state = TSENS_HW_STATE_CONFIGURED;
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return ESP_OK;
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}
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‎components/driver/esp32s3/rtc_tempsensor.c

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@@ -0,0 +1,168 @@
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/*
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* SPDX-FileCopyrightText: 2016-2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdlib.h>
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#include <ctype.h>
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#include <math.h>
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#include "esp_types.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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#include "esp_log.h"
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#include "esp_check.h"
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#include "soc/rtc_cntl_reg.h"
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#include "soc/rtc_io_reg.h"
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#include "soc/rtc_io_struct.h"
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#include "soc/sens_reg.h"
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#include "soc/sens_struct.h"
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#include "driver/temp_sensor.h"
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#include "regi2c_ctrl.h"
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#include "esp_log.h"
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#include "esp_efuse_rtc_calib.h"
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static const char *TAG = "tsens";
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#define TSENS_XPD_WAIT_DEFAULT 0xFF /* Set wait cycle time(8MHz) from power up to reset enable. */
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#define TSENS_ADC_FACTOR (0.4386)
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#define TSENS_DAC_FACTOR (27.88)
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#define TSENS_SYS_OFFSET (20.52)
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typedef struct {
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int index;
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int offset;
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int set_val;
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int range_min;
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int range_max;
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int error_max;
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} tsens_dac_offset_t;
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static const tsens_dac_offset_t dac_offset[TSENS_DAC_MAX] = {
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/* DAC Offset reg_val min max error */
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{TSENS_DAC_L0, -2, 5, 50, 125, 3},
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{TSENS_DAC_L1, -1, 7, 20, 100, 2},
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{TSENS_DAC_L2, 0, 15, -10, 80, 1},
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{TSENS_DAC_L3, 1, 11, -30, 50, 2},
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{TSENS_DAC_L4, 2, 10, -40, 20, 3},
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};
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typedef enum {
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TSENS_HW_STATE_UNCONFIGURED,
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TSENS_HW_STATE_CONFIGURED,
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TSENS_HW_STATE_STARTED,
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} tsens_hw_state_t;
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static tsens_hw_state_t tsens_hw_state = TSENS_HW_STATE_UNCONFIGURED;
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static float s_deltaT = NAN; // Unused number
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esp_err_t temp_sensor_set_config(temp_sensor_config_t tsens)
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{
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esp_err_t err = ESP_OK;
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if (tsens_hw_state == TSENS_HW_STATE_STARTED) {
64+
ESP_LOGE(TAG, "Do not configure the temp sensor when it's running!");
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err = ESP_ERR_INVALID_STATE;
66+
}
67+
CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, I2C_SAR_M);
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SET_PERI_REG_MASK(ANA_CONFIG2_REG, ANA_SAR_CFG2_M);
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REGI2C_WRITE_MASK(I2C_SAR_ADC, I2C_SARADC_TSENS_DAC, dac_offset[tsens.dac_offset].set_val);
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SENS.sar_tctrl.tsens_clk_div = tsens.clk_div;
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SENS.sar_tctrl.tsens_power_up_force = 1;
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SENS.sar_tctrl.tsens_power_up = 1;
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SENS.sar_tctrl2.tsens_xpd_force = 1;
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ESP_LOGI(TAG, "Config temperature range [%d°C ~ %d°C], error < %d°C",
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dac_offset[tsens.dac_offset].range_min,
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dac_offset[tsens.dac_offset].range_max,
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dac_offset[tsens.dac_offset].error_max);
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tsens_hw_state = TSENS_HW_STATE_CONFIGURED;
79+
return err;
80+
}
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esp_err_t temp_sensor_get_config(temp_sensor_config_t *tsens)
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{
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ESP_RETURN_ON_FALSE(tsens != NULL, ESP_ERR_INVALID_ARG, TAG, "no tsens specified");
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CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, I2C_SAR_M);
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SET_PERI_REG_MASK(ANA_CONFIG2_REG, ANA_SAR_CFG2_M);
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tsens->dac_offset = REGI2C_READ_MASK(I2C_SAR_ADC, I2C_SARADC_TSENS_DAC);
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for (int i = TSENS_DAC_L0; i < TSENS_DAC_MAX; i++) {
89+
if ((int)tsens->dac_offset == dac_offset[i].set_val) {
90+
tsens->dac_offset = dac_offset[i].index;
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break;
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}
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}
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tsens->clk_div = SENS.sar_tctrl.tsens_clk_div;
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return ESP_OK;
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}
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esp_err_t temp_sensor_start(void)
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{
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esp_err_t err = ESP_OK;
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if (tsens_hw_state != TSENS_HW_STATE_CONFIGURED) {
102+
ESP_LOGE(TAG, "Temperature sensor is already running or not be configured");
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err = ESP_ERR_INVALID_STATE;
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}
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SENS.sar_tctrl.tsens_dump_out = 0;
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SENS.sar_tctrl.tsens_power_up = 1;
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SENS.sar_peri_clk_gate_conf.tsens_clk_en = 1;
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tsens_hw_state = TSENS_HW_STATE_STARTED;
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return err;
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}
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esp_err_t temp_sensor_stop(void)
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{
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SENS.sar_tctrl.tsens_power_up = 0;
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tsens_hw_state = TSENS_HW_STATE_CONFIGURED;
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return ESP_OK;
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}
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esp_err_t temp_sensor_read_raw(uint32_t *tsens_out)
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{
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ESP_RETURN_ON_FALSE(tsens_out != NULL, ESP_ERR_INVALID_ARG, TAG, "no tsens_out specified");
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SENS.sar_tctrl.tsens_dump_out = 1;
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while (!SENS.sar_tctrl.tsens_ready);
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*tsens_out = SENS.sar_tctrl.tsens_out;
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SENS.sar_tctrl.tsens_dump_out = 0;
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return ESP_OK;
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}
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static void read_delta_t_from_efuse(void)
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{
131+
uint32_t version = esp_efuse_rtc_calib_get_ver();
132+
if (version == 1) {
133+
// fetch calibration value for temp sensor from eFuse
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s_deltaT = esp_efuse_rtc_calib_get_cal_temp(version);
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} else {
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// no value to fetch, use 0.
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s_deltaT = 0;
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}
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ESP_LOGD(TAG, "s_deltaT = %f", s_deltaT);
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}
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static float parse_temp_sensor_raw_value(uint32_t tsens_raw, const int dac_offset)
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{
144+
if (isnan(s_deltaT)) { //suggests that the value is not initialized
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read_delta_t_from_efuse();
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}
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float result = (TSENS_ADC_FACTOR * (float)tsens_raw - TSENS_DAC_FACTOR * dac_offset - TSENS_SYS_OFFSET) - s_deltaT;
148+
return result;
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}
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esp_err_t temp_sensor_read_celsius(float *celsius)
152+
{
153+
ESP_RETURN_ON_FALSE(celsius != NULL, ESP_ERR_INVALID_ARG, TAG, "celsius points to nothing");
154+
temp_sensor_config_t tsens;
155+
uint32_t tsens_out = 0;
156+
esp_err_t ret = temp_sensor_get_config(&tsens);
157+
if (ret == ESP_OK) {
158+
ret = temp_sensor_read_raw(&tsens_out);
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ESP_RETURN_ON_FALSE(ret == ESP_OK, ret, TAG, "failed to read raw data");
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const tsens_dac_offset_t *dac = &dac_offset[tsens.dac_offset];
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*celsius = parse_temp_sensor_raw_value(tsens_out, dac->offset);
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if (*celsius < dac->range_min || *celsius > dac->range_max) {
163+
ESP_LOGW(TAG, "Exceeding the temperature range!");
164+
ret = ESP_ERR_INVALID_STATE;
165+
}
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}
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return ret;
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}

‎components/efuse/esp32s3/esp_efuse_rtc_calib.c

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@@ -96,3 +96,19 @@ esp_err_t esp_efuse_rtc_calib_get_cal_voltage(int version, uint32_t adc_unit, in
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return ESP_OK;
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}
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float esp_efuse_rtc_calib_get_cal_temp(int version)
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{
102+
assert(version == 1);
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const esp_efuse_desc_t** cal_temp_efuse;
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cal_temp_efuse = ESP_EFUSE_TEMP_CALIB;
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int cal_temp_size = esp_efuse_get_field_size(cal_temp_efuse);
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assert(cal_temp_size == 9);
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uint32_t cal_temp = 0;
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esp_err_t err = esp_efuse_read_field_blob(cal_temp_efuse, &cal_temp, cal_temp_size);
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assert(err == ESP_OK);
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(void)err;
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// BIT(8) stands for sign: 1: negtive, 0: positive
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return ((cal_temp & BIT(8)) != 0)? -(uint8_t)cal_temp: (uint8_t)cal_temp;
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}

‎components/soc/esp32s3/include/soc/soc_caps.h

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#define SOC_FLASH_ENCRYPTION_XTS_AES_256 1
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#define SOC_PSRAM_DMA_CAPABLE 1
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#define SOC_XT_WDT_SUPPORTED 1
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#define SOC_TEMP_SENSOR_SUPPORTED 1
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/*-------------------------- SOC CAPS ----------------------------------------*/
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#define SOC_APPCPU_HAS_CLOCK_GATING_BUG (1)

‎docs/doxygen/Doxyfile_esp32s3

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@@ -8,6 +8,7 @@ INPUT += \
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$(PROJECT_PATH)/components/driver/include/driver/pcnt.h \
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$(PROJECT_PATH)/components/soc/$(IDF_TARGET)/include/soc/touch_sensor_channel.h \
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$(PROJECT_PATH)/components/driver/$(IDF_TARGET)/include/driver/touch_sensor.h \
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$(PROJECT_PATH)/components/driver/esp32s2/include/driver/temp_sensor.h \
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$(PROJECT_PATH)/components/ulp/include/esp32s3/ulp_riscv.h \
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$(PROJECT_PATH)/components/usb/include/usb/usb_helpers.h \
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$(PROJECT_PATH)/components/usb/include/usb/usb_host.h \

‎docs/en/api-reference/peripherals/temp_sensor.rst

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Temperature Sensor
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===================
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.. only:: esp32s3
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.. warning::
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This feature is not supported in v4.4
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Overview
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--------
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‎examples/peripherals/temp_sensor/README.md

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| Supported Targets | ESP32-S2 | ESP32-C3 |
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| ----------------- | -------- | -------- |
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| Supported Targets | ESP32-S2 | ESP32-C3 | ESP32-S3 |
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| ----------------- | -------- | -------- | -------- |
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# Temperature Sensor Example
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‎examples/peripherals/temp_sensor/main/temp_sensor_main.c

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/* Note: ESP32 don't support temperature sensor */
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#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3
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#if CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
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#include "driver/temp_sensor.h"
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static const char *TAG = "TempSensor";

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