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esp32/modesp32: Add raw temperature reading to esp32 module. 

Using direct register control as specified by ESP-IDF in
components/esp32/test/test_tsens.c.  Temperature doesn't represent any
particular unit, isn't calibrated and will vary from device to device.
This commit is contained in:
Jérôme Poulin 2018-07-11 00:12:54 -04:00 committed by Damien George
parent e94d644a81
commit 4f5b435d9b
1 changed files with 19 additions and 0 deletions
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19
ports/esp32/modesp32.c
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@ -29,6 +29,8 @@
#include <time.h>
#include <sys/time.h>
#include "soc/rtc_cntl_reg.h"
#include "soc/sens_reg.h"
#include "driver/gpio.h"
#include "py/nlr.h"
@ -120,12 +122,29 @@ STATIC mp_obj_t esp32_wake_on_ext1(size_t n_args, const mp_obj_t *pos_args, mp_m
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(esp32_wake_on_ext1_obj, 0, esp32_wake_on_ext1);
STATIC mp_obj_t esp32_raw_temperature(void) {
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 3, SENS_FORCE_XPD_SAR_S);
SET_PERI_REG_BITS(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_CLK_DIV, 10, SENS_TSENS_CLK_DIV_S);
CLEAR_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_POWER_UP);
CLEAR_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_DUMP_OUT);
SET_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_POWER_UP_FORCE);
SET_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_POWER_UP);
ets_delay_us(100);
SET_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_DUMP_OUT);
ets_delay_us(5);
int res = GET_PERI_REG_BITS2(SENS_SAR_SLAVE_ADDR3_REG, SENS_TSENS_OUT, SENS_TSENS_OUT_S);
return mp_obj_new_int(res);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(esp32_raw_temperature_obj, esp32_raw_temperature);
STATIC const mp_rom_map_elem_t esp32_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_esp32) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_wake_on_touch), (mp_obj_t)&esp32_wake_on_touch_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_wake_on_ext0), (mp_obj_t)&esp32_wake_on_ext0_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_wake_on_ext1), (mp_obj_t)&esp32_wake_on_ext1_obj },
{ MP_ROM_QSTR(MP_QSTR_raw_temperature), MP_ROM_PTR(&esp32_raw_temperature_obj) },
{ MP_ROM_QSTR(MP_QSTR_ULP), MP_ROM_PTR(&esp32_ulp_type) },