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esp-idf/components/driver/rtc_module.c

1304 wiersze
54 KiB
C
Czysty Wina Historia

// 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 "rom/ets_sys.h"
#include "esp_log.h"
#include "soc/rtc_io_reg.h"
#include "soc/rtc_io_struct.h"
#include "soc/sens_reg.h"
#include "soc/sens_struct.h"
#include "soc/rtc_cntl_reg.h"
#include "soc/rtc_cntl_struct.h"
#include "rtc_io.h"
#include "touch_pad.h"
#include "adc.h"
#include "dac.h"
#include "freertos/FreeRTOS.h"
#include "freertos/xtensa_api.h"
#include "freertos/semphr.h"
#include "freertos/timers.h"
#include "esp_intr_alloc.h"
#include "sys/lock.h"
#include "driver/rtc_cntl.h"
#include "driver/gpio.h"
#ifndef NDEBUG
// Enable built-in checks in queue.h in debug builds
#define INVARIANTS
#endif
#include "rom/queue.h"
static const char *RTC_MODULE_TAG = "RTC_MODULE";
#define RTC_MODULE_CHECK(a, str, ret_val) if (!(a)) { \
ESP_LOGE(RTC_MODULE_TAG,"%s:%d (%s):%s", __FILE__, __LINE__, __FUNCTION__, str); \
return (ret_val); \
}
#define RTC_RES_CHECK(res, ret_val) if ( (a) != ESP_OK) { \
ESP_LOGE(RTC_MODULE_TAG,"%s:%d (%s)", __FILE__, __LINE__, __FUNCTION__); \
return (ret_val); \
}
#define ADC1_CHECK_FUNCTION_RET(fun_ret) if(fun_ret!=ESP_OK){\
ESP_LOGE(RTC_MODULE_TAG,"%s:%d\n",__FUNCTION__,__LINE__);\
return ESP_FAIL;\
}
#define DAC_ERR_STR_CHANNEL_ERROR "DAC channel error"
portMUX_TYPE rtc_spinlock = portMUX_INITIALIZER_UNLOCKED;
static SemaphoreHandle_t rtc_touch_mux = NULL;
typedef struct {
TimerHandle_t timer;
uint32_t filtered_val[TOUCH_PAD_MAX];
uint32_t filter_period;
uint32_t period;
bool enable;
} touch_pad_filter_t;
static touch_pad_filter_t *s_touch_pad_filter = NULL;
//Reg,Mux,Fun,IE,Up,Down,Rtc_number
const rtc_gpio_desc_t rtc_gpio_desc[GPIO_PIN_COUNT] = {
{RTC_IO_TOUCH_PAD1_REG, RTC_IO_TOUCH_PAD1_MUX_SEL_M, RTC_IO_TOUCH_PAD1_FUN_SEL_S, RTC_IO_TOUCH_PAD1_FUN_IE_M, RTC_IO_TOUCH_PAD1_RUE_M, RTC_IO_TOUCH_PAD1_RDE_M, RTC_IO_TOUCH_PAD1_SLP_SEL_M, RTC_IO_TOUCH_PAD1_SLP_IE_M, RTC_IO_TOUCH_PAD1_HOLD_M, RTC_CNTL_TOUCH_PAD1_HOLD_FORCE_M, RTC_IO_TOUCH_PAD1_DRV_V, RTC_IO_TOUCH_PAD1_DRV_S, RTCIO_GPIO0_CHANNEL}, //0
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //1
{RTC_IO_TOUCH_PAD2_REG, RTC_IO_TOUCH_PAD2_MUX_SEL_M, RTC_IO_TOUCH_PAD2_FUN_SEL_S, RTC_IO_TOUCH_PAD2_FUN_IE_M, RTC_IO_TOUCH_PAD2_RUE_M, RTC_IO_TOUCH_PAD2_RDE_M, RTC_IO_TOUCH_PAD2_SLP_SEL_M, RTC_IO_TOUCH_PAD2_SLP_IE_M, RTC_IO_TOUCH_PAD2_HOLD_M, RTC_CNTL_TOUCH_PAD2_HOLD_FORCE_M, RTC_IO_TOUCH_PAD2_DRV_V, RTC_IO_TOUCH_PAD2_DRV_S, RTCIO_GPIO2_CHANNEL}, //2
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //3
{RTC_IO_TOUCH_PAD0_REG, RTC_IO_TOUCH_PAD0_MUX_SEL_M, RTC_IO_TOUCH_PAD0_FUN_SEL_S, RTC_IO_TOUCH_PAD0_FUN_IE_M, RTC_IO_TOUCH_PAD0_RUE_M, RTC_IO_TOUCH_PAD0_RDE_M, RTC_IO_TOUCH_PAD0_SLP_SEL_M, RTC_IO_TOUCH_PAD0_SLP_IE_M, RTC_IO_TOUCH_PAD0_HOLD_M, RTC_CNTL_TOUCH_PAD0_HOLD_FORCE_M, RTC_IO_TOUCH_PAD0_DRV_V, RTC_IO_TOUCH_PAD0_DRV_S, RTCIO_GPIO4_CHANNEL}, //4
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //5
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //6
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //7
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //8
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //9
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //10
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //11
{RTC_IO_TOUCH_PAD5_REG, RTC_IO_TOUCH_PAD5_MUX_SEL_M, RTC_IO_TOUCH_PAD5_FUN_SEL_S, RTC_IO_TOUCH_PAD5_FUN_IE_M, RTC_IO_TOUCH_PAD5_RUE_M, RTC_IO_TOUCH_PAD5_RDE_M, RTC_IO_TOUCH_PAD5_SLP_SEL_M, RTC_IO_TOUCH_PAD5_SLP_IE_M, RTC_IO_TOUCH_PAD5_HOLD_M, RTC_CNTL_TOUCH_PAD5_HOLD_FORCE_M, RTC_IO_TOUCH_PAD5_DRV_V, RTC_IO_TOUCH_PAD5_DRV_S, RTCIO_GPIO12_CHANNEL}, //12
{RTC_IO_TOUCH_PAD4_REG, RTC_IO_TOUCH_PAD4_MUX_SEL_M, RTC_IO_TOUCH_PAD4_FUN_SEL_S, RTC_IO_TOUCH_PAD4_FUN_IE_M, RTC_IO_TOUCH_PAD4_RUE_M, RTC_IO_TOUCH_PAD4_RDE_M, RTC_IO_TOUCH_PAD4_SLP_SEL_M, RTC_IO_TOUCH_PAD4_SLP_IE_M, RTC_IO_TOUCH_PAD4_HOLD_M, RTC_CNTL_TOUCH_PAD4_HOLD_FORCE_M, RTC_IO_TOUCH_PAD4_DRV_V, RTC_IO_TOUCH_PAD4_DRV_S, RTCIO_GPIO13_CHANNEL}, //13
{RTC_IO_TOUCH_PAD6_REG, RTC_IO_TOUCH_PAD6_MUX_SEL_M, RTC_IO_TOUCH_PAD6_FUN_SEL_S, RTC_IO_TOUCH_PAD6_FUN_IE_M, RTC_IO_TOUCH_PAD6_RUE_M, RTC_IO_TOUCH_PAD6_RDE_M, RTC_IO_TOUCH_PAD6_SLP_SEL_M, RTC_IO_TOUCH_PAD6_SLP_IE_M, RTC_IO_TOUCH_PAD6_HOLD_M, RTC_CNTL_TOUCH_PAD6_HOLD_FORCE_M, RTC_IO_TOUCH_PAD6_DRV_V, RTC_IO_TOUCH_PAD6_DRV_S, RTCIO_GPIO14_CHANNEL}, //14
{RTC_IO_TOUCH_PAD3_REG, RTC_IO_TOUCH_PAD3_MUX_SEL_M, RTC_IO_TOUCH_PAD3_FUN_SEL_S, RTC_IO_TOUCH_PAD3_FUN_IE_M, RTC_IO_TOUCH_PAD3_RUE_M, RTC_IO_TOUCH_PAD3_RDE_M, RTC_IO_TOUCH_PAD3_SLP_SEL_M, RTC_IO_TOUCH_PAD3_SLP_IE_M, RTC_IO_TOUCH_PAD3_HOLD_M, RTC_CNTL_TOUCH_PAD3_HOLD_FORCE_M, RTC_IO_TOUCH_PAD3_DRV_V, RTC_IO_TOUCH_PAD3_DRV_S, RTCIO_GPIO15_CHANNEL}, //15
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //16
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //17
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //18
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //19
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //20
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //21
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //22
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //23
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //24
{RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_MUX_SEL_M, RTC_IO_PDAC1_FUN_SEL_S, RTC_IO_PDAC1_FUN_IE_M, RTC_IO_PDAC1_RUE_M, RTC_IO_PDAC1_RDE_M, RTC_IO_PDAC1_SLP_SEL_M, RTC_IO_PDAC1_SLP_IE_M, RTC_IO_PDAC1_HOLD_M, RTC_CNTL_PDAC1_HOLD_FORCE_M, RTC_IO_PDAC1_DRV_V, RTC_IO_PDAC1_DRV_S, RTCIO_GPIO25_CHANNEL}, //25
{RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_MUX_SEL_M, RTC_IO_PDAC2_FUN_SEL_S, RTC_IO_PDAC2_FUN_IE_M, RTC_IO_PDAC2_RUE_M, RTC_IO_PDAC2_RDE_M, RTC_IO_PDAC2_SLP_SEL_M, RTC_IO_PDAC2_SLP_IE_M, RTC_IO_PDAC2_HOLD_M, RTC_CNTL_PDAC1_HOLD_FORCE_M, RTC_IO_PDAC2_DRV_V, RTC_IO_PDAC2_DRV_S, RTCIO_GPIO26_CHANNEL}, //26
{RTC_IO_TOUCH_PAD7_REG, RTC_IO_TOUCH_PAD7_MUX_SEL_M, RTC_IO_TOUCH_PAD7_FUN_SEL_S, RTC_IO_TOUCH_PAD7_FUN_IE_M, RTC_IO_TOUCH_PAD7_RUE_M, RTC_IO_TOUCH_PAD7_RDE_M, RTC_IO_TOUCH_PAD7_SLP_SEL_M, RTC_IO_TOUCH_PAD7_SLP_IE_M, RTC_IO_TOUCH_PAD7_HOLD_M, RTC_CNTL_TOUCH_PAD7_HOLD_FORCE_M, RTC_IO_TOUCH_PAD7_DRV_V, RTC_IO_TOUCH_PAD7_DRV_S, RTCIO_GPIO27_CHANNEL}, //27
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //28
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //29
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //30
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, //31
{RTC_IO_XTAL_32K_PAD_REG, RTC_IO_X32P_MUX_SEL_M, RTC_IO_X32P_FUN_SEL_S, RTC_IO_X32P_FUN_IE_M, RTC_IO_X32P_RUE_M, RTC_IO_X32P_RDE_M, RTC_IO_X32P_SLP_SEL_M, RTC_IO_X32P_SLP_IE_M, RTC_IO_X32P_HOLD_M, RTC_CNTL_X32P_HOLD_FORCE_M, RTC_IO_X32P_DRV_V, RTC_IO_X32P_DRV_S, RTCIO_GPIO32_CHANNEL}, //32
{RTC_IO_XTAL_32K_PAD_REG, RTC_IO_X32N_MUX_SEL_M, RTC_IO_X32N_FUN_SEL_S, RTC_IO_X32N_FUN_IE_M, RTC_IO_X32N_RUE_M, RTC_IO_X32N_RDE_M, RTC_IO_X32N_SLP_SEL_M, RTC_IO_X32N_SLP_IE_M, RTC_IO_X32N_HOLD_M, RTC_CNTL_X32N_HOLD_FORCE_M, RTC_IO_X32N_DRV_V, RTC_IO_X32N_DRV_S, RTCIO_GPIO33_CHANNEL}, //33
{RTC_IO_ADC_PAD_REG, RTC_IO_ADC1_MUX_SEL_M, RTC_IO_ADC1_FUN_SEL_S, RTC_IO_ADC1_FUN_IE_M, 0, 0, RTC_IO_ADC1_SLP_SEL_M, RTC_IO_ADC1_SLP_IE_M, RTC_IO_ADC1_HOLD_M, RTC_CNTL_ADC1_HOLD_FORCE_M, 0, 0, RTCIO_GPIO34_CHANNEL}, //34
{RTC_IO_ADC_PAD_REG, RTC_IO_ADC2_MUX_SEL_M, RTC_IO_ADC2_FUN_SEL_S, RTC_IO_ADC2_FUN_IE_M, 0, 0, RTC_IO_ADC2_SLP_SEL_M, RTC_IO_ADC2_SLP_IE_M, RTC_IO_ADC1_HOLD_M, RTC_CNTL_ADC2_HOLD_FORCE_M, 0, 0, RTCIO_GPIO35_CHANNEL}, //35
{RTC_IO_SENSOR_PADS_REG, RTC_IO_SENSE1_MUX_SEL_M, RTC_IO_SENSE1_FUN_SEL_S, RTC_IO_SENSE1_FUN_IE_M, 0, 0, RTC_IO_SENSE1_SLP_SEL_M, RTC_IO_SENSE1_SLP_IE_M, RTC_IO_SENSE1_HOLD_M, RTC_CNTL_SENSE1_HOLD_FORCE_M, 0, 0, RTCIO_GPIO36_CHANNEL}, //36
{RTC_IO_SENSOR_PADS_REG, RTC_IO_SENSE2_MUX_SEL_M, RTC_IO_SENSE2_FUN_SEL_S, RTC_IO_SENSE2_FUN_IE_M, 0, 0, RTC_IO_SENSE2_SLP_SEL_M, RTC_IO_SENSE2_SLP_IE_M, RTC_IO_SENSE1_HOLD_M, RTC_CNTL_SENSE2_HOLD_FORCE_M, 0, 0, RTCIO_GPIO37_CHANNEL}, //37
{RTC_IO_SENSOR_PADS_REG, RTC_IO_SENSE3_MUX_SEL_M, RTC_IO_SENSE3_FUN_SEL_S, RTC_IO_SENSE3_FUN_IE_M, 0, 0, RTC_IO_SENSE3_SLP_SEL_M, RTC_IO_SENSE3_SLP_IE_M, RTC_IO_SENSE1_HOLD_M, RTC_CNTL_SENSE3_HOLD_FORCE_M, 0, 0, RTCIO_GPIO38_CHANNEL}, //38
{RTC_IO_SENSOR_PADS_REG, RTC_IO_SENSE4_MUX_SEL_M, RTC_IO_SENSE4_FUN_SEL_S, RTC_IO_SENSE4_FUN_IE_M, 0, 0, RTC_IO_SENSE4_SLP_SEL_M, RTC_IO_SENSE4_SLP_IE_M, RTC_IO_SENSE1_HOLD_M, RTC_CNTL_SENSE4_HOLD_FORCE_M, 0, 0, RTCIO_GPIO39_CHANNEL}, //39
};
/*---------------------------------------------------------------
RTC IO
---------------------------------------------------------------*/
esp_err_t rtc_gpio_init(gpio_num_t gpio_num)
{
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
// 0: GPIO connected to digital GPIO module. 1: GPIO connected to analog RTC module.
SET_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, (rtc_gpio_desc[gpio_num].mux));
//0:RTC FUNCIOTN 1,2,3:Reserved
SET_PERI_REG_BITS(rtc_gpio_desc[gpio_num].reg, RTC_IO_TOUCH_PAD1_FUN_SEL_V, 0x0, rtc_gpio_desc[gpio_num].func);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t rtc_gpio_deinit(gpio_num_t gpio_num)
{
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
//Select Gpio as Digital Gpio
CLEAR_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, (rtc_gpio_desc[gpio_num].mux));
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
static esp_err_t rtc_gpio_output_enable(gpio_num_t gpio_num)
{
int rtc_gpio_num = rtc_gpio_desc[gpio_num].rtc_num;
RTC_MODULE_CHECK(rtc_gpio_num != -1, "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
SET_PERI_REG_MASK(RTC_GPIO_ENABLE_W1TS_REG, (1 << (rtc_gpio_num + RTC_GPIO_ENABLE_W1TS_S)));
CLEAR_PERI_REG_MASK(RTC_GPIO_ENABLE_W1TC_REG, (1 << (rtc_gpio_num + RTC_GPIO_ENABLE_W1TC_S)));
return ESP_OK;
}
static esp_err_t rtc_gpio_output_disable(gpio_num_t gpio_num)
{
int rtc_gpio_num = rtc_gpio_desc[gpio_num].rtc_num;
RTC_MODULE_CHECK(rtc_gpio_num != -1, "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
CLEAR_PERI_REG_MASK(RTC_GPIO_ENABLE_W1TS_REG, (1 << (rtc_gpio_num + RTC_GPIO_ENABLE_W1TS_S)));
SET_PERI_REG_MASK(RTC_GPIO_ENABLE_W1TC_REG, (1 << ( rtc_gpio_num + RTC_GPIO_ENABLE_W1TC_S)));
return ESP_OK;
}
static esp_err_t rtc_gpio_input_enable(gpio_num_t gpio_num)
{
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].ie);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
static esp_err_t rtc_gpio_input_disable(gpio_num_t gpio_num)
{
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
CLEAR_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].ie);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t rtc_gpio_set_level(gpio_num_t gpio_num, uint32_t level)
{
int rtc_gpio_num = rtc_gpio_num = rtc_gpio_desc[gpio_num].rtc_num;;
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
if (level) {
WRITE_PERI_REG(RTC_GPIO_OUT_W1TS_REG, (1 << (rtc_gpio_num + RTC_GPIO_OUT_DATA_W1TS_S)));
} else {
WRITE_PERI_REG(RTC_GPIO_OUT_W1TC_REG, (1 << (rtc_gpio_num + RTC_GPIO_OUT_DATA_W1TC_S)));
}
return ESP_OK;
}
uint32_t rtc_gpio_get_level(gpio_num_t gpio_num)
{
uint32_t level = 0;
int rtc_gpio_num = rtc_gpio_desc[gpio_num].rtc_num;
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
level = READ_PERI_REG(RTC_GPIO_IN_REG);
portEXIT_CRITICAL(&rtc_spinlock);
return ((level >> (RTC_GPIO_IN_NEXT_S + rtc_gpio_num)) & 0x01);
}
esp_err_t rtc_gpio_set_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t strength)
{
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "Output pad only", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(strength < GPIO_DRIVE_CAP_MAX, "GPIO drive capability error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_BITS(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].drv_v, strength, rtc_gpio_desc[gpio_num].drv_s);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t rtc_gpio_get_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t* strength)
{
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(GPIO_IS_VALID_OUTPUT_GPIO(gpio_num), "Output pad only", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(strength != NULL, "GPIO drive pointer error", ESP_ERR_INVALID_ARG);
*strength = GET_PERI_REG_BITS2(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].drv_v, rtc_gpio_desc[gpio_num].drv_s);
return ESP_OK;
}
esp_err_t rtc_gpio_set_direction(gpio_num_t gpio_num, rtc_gpio_mode_t mode)
{
RTC_MODULE_CHECK(rtc_gpio_is_valid_gpio(gpio_num), "RTC_GPIO number error", ESP_ERR_INVALID_ARG);
switch (mode) {
case RTC_GPIO_MODE_INPUT_ONLY:
rtc_gpio_output_disable(gpio_num);
rtc_gpio_input_enable(gpio_num);
break;
case RTC_GPIO_MODE_OUTPUT_ONLY:
rtc_gpio_output_enable(gpio_num);
rtc_gpio_input_disable(gpio_num);
break;
case RTC_GPIO_MODE_INPUT_OUTUT:
rtc_gpio_output_enable(gpio_num);
rtc_gpio_input_enable(gpio_num);
break;
case RTC_GPIO_MODE_DISABLED:
rtc_gpio_output_disable(gpio_num);
rtc_gpio_input_disable(gpio_num);
break;
}
return ESP_OK;
}
esp_err_t rtc_gpio_pullup_en(gpio_num_t gpio_num)
{
//this is a digital pad
if (rtc_gpio_desc[gpio_num].pullup == 0) {
return ESP_ERR_INVALID_ARG;
}
//this is a rtc pad
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].pullup);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t rtc_gpio_pulldown_en(gpio_num_t gpio_num)
{
//this is a digital pad
if (rtc_gpio_desc[gpio_num].pulldown == 0) {
return ESP_ERR_INVALID_ARG;
}
//this is a rtc pad
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].pulldown);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t rtc_gpio_pullup_dis(gpio_num_t gpio_num)
{
//this is a digital pad
if ( rtc_gpio_desc[gpio_num].pullup == 0 ) {
return ESP_ERR_INVALID_ARG;
}
//this is a rtc pad
portENTER_CRITICAL(&rtc_spinlock);
CLEAR_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].pullup);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t rtc_gpio_pulldown_dis(gpio_num_t gpio_num)
{
//this is a digital pad
if (rtc_gpio_desc[gpio_num].pulldown == 0) {
return ESP_ERR_INVALID_ARG;
}
//this is a rtc pad
portENTER_CRITICAL(&rtc_spinlock);
CLEAR_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].pulldown);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t rtc_gpio_hold_en(gpio_num_t gpio_num)
{
// check if an RTC IO
if (rtc_gpio_desc[gpio_num].pullup == 0) {
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].hold);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t rtc_gpio_hold_dis(gpio_num_t gpio_num)
{
// check if an RTC IO
if (rtc_gpio_desc[gpio_num].pullup == 0) {
return ESP_ERR_INVALID_ARG;
}
portENTER_CRITICAL(&rtc_spinlock);
CLEAR_PERI_REG_MASK(rtc_gpio_desc[gpio_num].reg, rtc_gpio_desc[gpio_num].hold);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
void rtc_gpio_force_hold_dis_all()
{
for (int gpio = 0; gpio < GPIO_PIN_COUNT; ++gpio) {
const rtc_gpio_desc_t* desc = &rtc_gpio_desc[gpio];
if (desc->hold_force != 0) {
REG_CLR_BIT(RTC_CNTL_HOLD_FORCE_REG, desc->hold_force);
}
}
}
/*---------------------------------------------------------------
Touch Pad
---------------------------------------------------------------*/
esp_err_t touch_pad_isr_handler_register(void (*fn)(void *), void *arg, int no_use, intr_handle_t *handle_no_use)
{
RTC_MODULE_CHECK(fn, "Touch_Pad ISR null", ESP_ERR_INVALID_ARG);
return rtc_isr_register(fn, arg, RTC_CNTL_TOUCH_INT_ST_M);
}
esp_err_t touch_pad_isr_register(intr_handler_t fn, void* arg)
{
RTC_MODULE_CHECK(fn, "Touch_Pad ISR null", ESP_ERR_INVALID_ARG);
return rtc_isr_register(fn, arg, RTC_CNTL_TOUCH_INT_ST_M);
}
esp_err_t touch_pad_isr_deregister(intr_handler_t fn, void *arg)
{
return rtc_isr_deregister(fn, arg);
}
static esp_err_t touch_pad_get_io_num(touch_pad_t touch_num, gpio_num_t *gpio_num)
{
switch (touch_num) {
case TOUCH_PAD_NUM0:
*gpio_num = TOUCH_PAD_NUM0_GPIO_NUM;
break;
case TOUCH_PAD_NUM1:
*gpio_num = TOUCH_PAD_NUM1_GPIO_NUM;
break;
case TOUCH_PAD_NUM2:
*gpio_num = TOUCH_PAD_NUM2_GPIO_NUM;
break;
case TOUCH_PAD_NUM3:
*gpio_num = TOUCH_PAD_NUM3_GPIO_NUM;
break;
case TOUCH_PAD_NUM4:
*gpio_num = TOUCH_PAD_NUM4_GPIO_NUM;
break;
case TOUCH_PAD_NUM5:
*gpio_num = TOUCH_PAD_NUM5_GPIO_NUM;
break;
case TOUCH_PAD_NUM6:
*gpio_num = TOUCH_PAD_NUM6_GPIO_NUM;
break;
case TOUCH_PAD_NUM7:
*gpio_num = TOUCH_PAD_NUM7_GPIO_NUM;
break;
case TOUCH_PAD_NUM8:
*gpio_num = TOUCH_PAD_NUM8_GPIO_NUM;
break;
case TOUCH_PAD_NUM9:
*gpio_num = TOUCH_PAD_NUM9_GPIO_NUM;
break;
default:
return ESP_ERR_INVALID_ARG;
}
return ESP_OK;
}
#define TOUCH_PAD_FILTER_FACTOR_DEFAULT (16)
#define TOUCH_PAD_SHIFT_DEFAULT (4)
static uint32_t _touch_filter_iir(uint32_t in_now, uint32_t out_last, uint32_t k)
{
if (k == 0) {
return in_now;
} else {
uint32_t out_now = (in_now + (k - 1) * out_last) / k;
return out_now;
}
}
static void touch_pad_filter_cb(void *arg)
{
if (s_touch_pad_filter == NULL) {
return;
}
uint16_t val;
for (int i = 0; i < TOUCH_PAD_MAX; i++) {
touch_pad_read(i, &val);
s_touch_pad_filter->filtered_val[i] = s_touch_pad_filter->filtered_val[i] == 0 ? (val << TOUCH_PAD_SHIFT_DEFAULT) : s_touch_pad_filter->filtered_val[i];
s_touch_pad_filter->filtered_val[i] = _touch_filter_iir((val << TOUCH_PAD_SHIFT_DEFAULT),
s_touch_pad_filter->filtered_val[i], TOUCH_PAD_FILTER_FACTOR_DEFAULT);
}
}
esp_err_t touch_pad_set_meas_time(uint16_t sleep_cycle, uint16_t meas_cycle)
{
xSemaphoreTake(rtc_touch_mux, portMAX_DELAY);
portENTER_CRITICAL(&rtc_spinlock);
//touch sensor sleep cycle Time = sleep_cycle / RTC_SLOW_CLK( can be 150k or 32k depending on the options)
SENS.sar_touch_ctrl2.touch_sleep_cycles = sleep_cycle;
//touch sensor measure time= meas_cycle / 8Mhz
SENS.sar_touch_ctrl1.touch_meas_delay = meas_cycle;
portEXIT_CRITICAL(&rtc_spinlock);
xSemaphoreGive(rtc_touch_mux);
return ESP_OK;
}
esp_err_t touch_pad_get_meas_time(uint16_t *sleep_cycle, uint16_t *meas_cycle)
{
portENTER_CRITICAL(&rtc_spinlock);
if (sleep_cycle) {
*sleep_cycle = SENS.sar_touch_ctrl2.touch_sleep_cycles;
}
if (meas_cycle) {
*meas_cycle = SENS.sar_touch_ctrl1.touch_meas_delay;
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_set_voltage(touch_high_volt_t refh, touch_low_volt_t refl, touch_volt_atten_t atten)
{
RTC_MODULE_CHECK(((refh < TOUCH_HVOLT_MAX) && (refh >= (int )TOUCH_HVOLT_KEEP)), "touch refh error",
ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(((refl < TOUCH_LVOLT_MAX) && (refh >= (int )TOUCH_LVOLT_KEEP)), "touch refl error",
ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(((atten < TOUCH_HVOLT_ATTEN_MAX) && (refh >= (int )TOUCH_HVOLT_ATTEN_KEEP)), "touch atten error",
ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
if (refh > TOUCH_HVOLT_KEEP) {
RTCIO.touch_cfg.drefh = refh;
}
if (refl > TOUCH_LVOLT_KEEP) {
RTCIO.touch_cfg.drefl = refl;
}
if (atten > TOUCH_HVOLT_ATTEN_KEEP) {
RTCIO.touch_cfg.drange = atten;
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_get_voltage(touch_high_volt_t *refh, touch_low_volt_t *refl, touch_volt_atten_t *atten)
{
portENTER_CRITICAL(&rtc_spinlock);
if (refh) {
*refh = RTCIO.touch_cfg.drefh;
}
if (refl) {
*refl = RTCIO.touch_cfg.drefl;
}
if (atten) {
*atten = RTCIO.touch_cfg.drange;
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_set_cnt_mode(touch_pad_t touch_num, touch_cnt_slope_t slope, touch_tie_opt_t opt)
{
RTC_MODULE_CHECK((slope < TOUCH_PAD_SLOPE_MAX), "touch slope error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK((opt < TOUCH_PAD_TIE_OPT_MAX), "touch opt error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
//set tie opt value, high or low level seem no difference for counter
RTCIO.touch_pad[touch_num].tie_opt = opt;
//touch sensor set slope for charging and discharging.
RTCIO.touch_pad[touch_num].dac = slope;
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_get_cnt_mode(touch_pad_t touch_num, touch_cnt_slope_t *slope, touch_tie_opt_t *opt)
{
RTC_MODULE_CHECK((touch_num < TOUCH_PAD_MAX), "touch IO error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
if (slope) {
*slope = RTCIO.touch_pad[touch_num].dac;
}
if (opt) {
*opt = RTCIO.touch_pad[touch_num].tie_opt;
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_io_init(touch_pad_t touch_num)
{
RTC_MODULE_CHECK((touch_num < TOUCH_PAD_MAX), "touch IO error", ESP_ERR_INVALID_ARG);
gpio_num_t gpio_num = GPIO_NUM_0;
touch_pad_get_io_num(touch_num, &gpio_num);
rtc_gpio_init(gpio_num);
rtc_gpio_set_direction(gpio_num, RTC_GPIO_MODE_DISABLED);
rtc_gpio_pulldown_dis(gpio_num);
rtc_gpio_pullup_dis(gpio_num);
return ESP_OK;
}
esp_err_t touch_pad_set_fsm_mode(touch_fsm_mode_t mode)
{
RTC_MODULE_CHECK((mode < TOUCH_FSM_MODE_MAX), "touch fsm mode error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
SENS.sar_touch_ctrl2.touch_start_en = 0;
SENS.sar_touch_ctrl2.touch_start_force = mode;
RTCCNTL.state0.touch_slp_timer_en = (mode == TOUCH_FSM_MODE_TIMER ? 1 : 0);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_get_fsm_mode(touch_fsm_mode_t *mode)
{
if (mode) {
*mode = SENS.sar_touch_ctrl2.touch_start_force;
}
return ESP_OK;
}
esp_err_t touch_pad_sw_start()
{
portENTER_CRITICAL(&rtc_spinlock);
SENS.sar_touch_ctrl2.touch_start_en = 0;
SENS.sar_touch_ctrl2.touch_start_en = 1;
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_set_thresh(touch_pad_t touch_num, uint16_t threshold)
{
RTC_MODULE_CHECK((touch_num < TOUCH_PAD_MAX), "touch IO error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
if (touch_num & 0x1) {
SENS.touch_thresh[touch_num / 2].l_thresh = threshold;
} else {
SENS.touch_thresh[touch_num / 2].h_thresh = threshold;
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_get_thresh(touch_pad_t touch_num, uint16_t *threshold)
{
RTC_MODULE_CHECK((touch_num < TOUCH_PAD_MAX), "touch IO error", ESP_ERR_INVALID_ARG);
if (threshold) {
*threshold = (touch_num & 0x1 )? \
SENS.touch_thresh[touch_num / 2].l_thresh : \
SENS.touch_thresh[touch_num / 2].h_thresh;
}
return ESP_OK;
}
esp_err_t touch_pad_set_trigger_mode(touch_trigger_mode_t mode)
{
RTC_MODULE_CHECK((mode < TOUCH_TRIGGER_MAX), "touch trigger mode error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
SENS.sar_touch_ctrl1.touch_out_sel = mode;
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_get_trigger_mode(touch_trigger_mode_t *mode)
{
if (mode) {
*mode = SENS.sar_touch_ctrl1.touch_out_sel;
}
return ESP_OK;
}
esp_err_t touch_pad_set_trigger_source(touch_trigger_src_t src)
{
RTC_MODULE_CHECK((src < TOUCH_TRIGGER_SOURCE_MAX), "touch trigger source error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
SENS.sar_touch_ctrl1.touch_out_1en = src;
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_get_trigger_source(touch_trigger_src_t *src)
{
if (src) {
*src = SENS.sar_touch_ctrl1.touch_out_1en;
}
return ESP_OK;
}
esp_err_t touch_pad_set_group_mask(uint16_t set1_mask, uint16_t set2_mask, uint16_t en_mask)
{
RTC_MODULE_CHECK((set1_mask <= TOUCH_PAD_BIT_MASK_MAX), "touch set1 bitmask error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK((set2_mask <= TOUCH_PAD_BIT_MASK_MAX), "touch set2 bitmask error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK((en_mask <= TOUCH_PAD_BIT_MASK_MAX), "touch work_en bitmask error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
SENS.sar_touch_enable.touch_pad_outen1 |= set1_mask;
SENS.sar_touch_enable.touch_pad_outen2 |= set2_mask;
SENS.sar_touch_enable.touch_pad_worken |= en_mask;
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_get_group_mask(uint16_t *set1_mask, uint16_t *set2_mask, uint16_t *en_mask)
{
portENTER_CRITICAL(&rtc_spinlock);
if (set1_mask) {
*set1_mask = SENS.sar_touch_enable.touch_pad_outen1;
}
if (set2_mask) {
*set2_mask = SENS.sar_touch_enable.touch_pad_outen2;
}
if (en_mask) {
*en_mask = SENS.sar_touch_enable.touch_pad_worken;
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_clear_group_mask(uint16_t set1_mask, uint16_t set2_mask, uint16_t en_mask)
{
RTC_MODULE_CHECK((set1_mask <= TOUCH_PAD_BIT_MASK_MAX), "touch set1 bitmask error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK((set2_mask <= TOUCH_PAD_BIT_MASK_MAX), "touch set2 bitmask error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK((en_mask <= TOUCH_PAD_BIT_MASK_MAX), "touch work_en bitmask error", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
SENS.sar_touch_enable.touch_pad_outen1 &= (~set1_mask);
SENS.sar_touch_enable.touch_pad_outen2 &= (~set2_mask);
SENS.sar_touch_enable.touch_pad_worken &= (~en_mask);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
uint32_t IRAM_ATTR touch_pad_get_status()
{
return SENS.sar_touch_ctrl2.touch_meas_en;
}
esp_err_t IRAM_ATTR touch_pad_clear_status()
{
portENTER_CRITICAL(&rtc_spinlock);
SENS.sar_touch_ctrl2.touch_meas_en_clr = 1;
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_intr_enable()
{
portENTER_CRITICAL(&rtc_spinlock);
RTCCNTL.int_ena.rtc_touch = 1;
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_intr_disable()
{
portENTER_CRITICAL(&rtc_spinlock);
RTCCNTL.int_ena.rtc_touch = 0;
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t touch_pad_config(touch_pad_t touch_num, uint16_t threshold)
{
RTC_MODULE_CHECK(rtc_touch_mux != NULL, "Touch pad not initialized", ESP_FAIL);
RTC_MODULE_CHECK(touch_num < TOUCH_PAD_MAX, "Touch_Pad Num Err", ESP_ERR_INVALID_ARG);
touch_pad_set_thresh(touch_num, threshold);
touch_pad_io_init(touch_num);
touch_pad_set_cnt_mode(touch_num, TOUCH_PAD_SLOPE_7, TOUCH_PAD_TIE_OPT_HIGH);
touch_pad_set_group_mask((1 << touch_num), (1 << touch_num), (1 << touch_num));
return ESP_OK;
}
esp_err_t touch_pad_init()
{
if (rtc_touch_mux == NULL) {
rtc_touch_mux = xSemaphoreCreateMutex();
}
if (rtc_touch_mux == NULL) {
return ESP_FAIL;
}
touch_pad_intr_disable();
touch_pad_set_fsm_mode(TOUCH_FSM_MODE_DEFAULT);
touch_pad_set_trigger_mode(TOUCH_TRIGGER_MODE_DEFAULT);
touch_pad_set_trigger_source(TOUCH_TRIGGER_SOURCE_DEFAULT);
touch_pad_clear_status();
touch_pad_set_meas_time(TOUCH_PAD_SLEEP_CYCLE_DEFAULT, TOUCH_PAD_MEASURE_CYCLE_DEFAULT);
return ESP_OK;
}
esp_err_t touch_pad_deinit()
{
if (rtc_touch_mux == NULL) {
return ESP_FAIL;
}
touch_pad_filter_delete();
touch_pad_set_fsm_mode(TOUCH_FSM_MODE_SW);
touch_pad_clear_status();
touch_pad_intr_disable();
vSemaphoreDelete(rtc_touch_mux);
rtc_touch_mux = NULL;
return ESP_OK;
}
esp_err_t touch_pad_read(touch_pad_t touch_num, uint16_t *touch_value)
{
RTC_MODULE_CHECK(touch_num < TOUCH_PAD_MAX, "Touch_Pad Num Err", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(touch_value != NULL, "touch_value", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(rtc_touch_mux != NULL, "Touch pad not initialized", ESP_FAIL);
xSemaphoreTake(rtc_touch_mux, portMAX_DELAY);
while (SENS.sar_touch_ctrl2.touch_meas_done == 0) {};
*touch_value = (touch_num & 0x1) ? \
SENS.touch_meas[touch_num / 2].l_val: \
SENS.touch_meas[touch_num / 2].h_val;
xSemaphoreGive(rtc_touch_mux);
return ESP_OK;
}
IRAM_ATTR esp_err_t touch_pad_read_filtered(touch_pad_t touch_num, uint16_t *touch_value)
{
RTC_MODULE_CHECK(rtc_touch_mux != NULL, "Touch pad not initialized", ESP_FAIL);
RTC_MODULE_CHECK(touch_num < TOUCH_PAD_MAX, "Touch_Pad Num Err", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(touch_value != NULL, "touch_value", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(s_touch_pad_filter != NULL, "Touch pad filter not initialized", ESP_ERR_INVALID_STATE);
*touch_value = (s_touch_pad_filter->filtered_val[touch_num] >> TOUCH_PAD_SHIFT_DEFAULT);
return ESP_OK;
}
esp_err_t touch_pad_set_filter_period(uint32_t new_period_ms)
{
RTC_MODULE_CHECK(s_touch_pad_filter != NULL, "Touch pad filter not initialized", ESP_ERR_INVALID_STATE);
RTC_MODULE_CHECK(new_period_ms > 0, "Touch pad filter period error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(rtc_touch_mux != NULL, "Touch pad not initialized", ESP_ERR_INVALID_STATE);
esp_err_t ret = ESP_OK;
xSemaphoreTake(rtc_touch_mux, portMAX_DELAY);
if (s_touch_pad_filter != NULL) {
xTimerChangePeriod(s_touch_pad_filter->timer, new_period_ms / portTICK_PERIOD_MS, portMAX_DELAY);
s_touch_pad_filter->period = new_period_ms;
} else {
ESP_LOGE(RTC_MODULE_TAG, "Touch pad filter deleted");
ret = ESP_ERR_INVALID_STATE;
}
xSemaphoreGive(rtc_touch_mux);
return ret;
}
esp_err_t touch_pad_get_filter_period(uint32_t* p_period_ms)
{
RTC_MODULE_CHECK(s_touch_pad_filter != NULL, "Touch pad filter not initialized", ESP_ERR_INVALID_STATE);
RTC_MODULE_CHECK(p_period_ms != NULL, "Touch pad period pointer error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(rtc_touch_mux != NULL, "Touch pad not initialized", ESP_ERR_INVALID_STATE);
esp_err_t ret = ESP_OK;
xSemaphoreTake(rtc_touch_mux, portMAX_DELAY);
if (s_touch_pad_filter != NULL) {
*p_period_ms = s_touch_pad_filter->period;
} else {
ESP_LOGE(RTC_MODULE_TAG, "Touch pad filter deleted");
ret = ESP_ERR_INVALID_STATE;
}
xSemaphoreGive(rtc_touch_mux);
return ret;
}
esp_err_t touch_pad_filter_start(uint32_t filter_period_ms)
{
RTC_MODULE_CHECK(filter_period_ms >= portTICK_PERIOD_MS, "Touch pad filter period error", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(rtc_touch_mux != NULL, "Touch pad not initialized", ESP_ERR_INVALID_STATE);
esp_err_t ret = ESP_OK;
xSemaphoreTake(rtc_touch_mux, portMAX_DELAY);
if (s_touch_pad_filter == NULL) {
s_touch_pad_filter = (touch_pad_filter_t *) calloc(1, sizeof(touch_pad_filter_t));
if (s_touch_pad_filter == NULL) {
ret = ESP_ERR_NO_MEM;
}
}
if (s_touch_pad_filter->timer == NULL) {
s_touch_pad_filter->timer = xTimerCreate("filter_tmr", filter_period_ms / portTICK_PERIOD_MS, pdTRUE,
NULL, touch_pad_filter_cb);
if (s_touch_pad_filter->timer == NULL) {
ret = ESP_ERR_NO_MEM;
}
xTimerStart(s_touch_pad_filter->timer, portMAX_DELAY);
s_touch_pad_filter->enable = true;
} else {
xTimerChangePeriod(s_touch_pad_filter->timer, filter_period_ms / portTICK_PERIOD_MS, portMAX_DELAY);
s_touch_pad_filter->period = filter_period_ms;
xTimerStart(s_touch_pad_filter->timer, portMAX_DELAY);
}
xSemaphoreGive(rtc_touch_mux);
return ret;
}
esp_err_t touch_pad_filter_stop()
{
RTC_MODULE_CHECK(s_touch_pad_filter != NULL, "Touch pad filter not initialized", ESP_ERR_INVALID_STATE);
esp_err_t ret = ESP_OK;
xSemaphoreTake(rtc_touch_mux, portMAX_DELAY);
if (s_touch_pad_filter != NULL) {
xTimerStop(s_touch_pad_filter->timer, portMAX_DELAY);
s_touch_pad_filter->enable = false;
} else {
ESP_LOGE(RTC_MODULE_TAG, "Touch pad filter deleted");
ret = ESP_ERR_INVALID_STATE;
}
xSemaphoreGive(rtc_touch_mux);
return ret;
}
esp_err_t touch_pad_filter_delete()
{
RTC_MODULE_CHECK(s_touch_pad_filter != NULL, "Touch pad filter not initialized", ESP_ERR_INVALID_STATE);
xSemaphoreTake(rtc_touch_mux, portMAX_DELAY);
if (s_touch_pad_filter != NULL) {
if (s_touch_pad_filter->timer != NULL) {
xTimerStop(s_touch_pad_filter->timer, portMAX_DELAY);
xTimerDelete(s_touch_pad_filter->timer, portMAX_DELAY);
s_touch_pad_filter->timer = NULL;
}
free(s_touch_pad_filter);
s_touch_pad_filter = NULL;
}
xSemaphoreGive(rtc_touch_mux);
return ESP_OK;
}
/*---------------------------------------------------------------
ADC
---------------------------------------------------------------*/
static esp_err_t adc1_pad_get_io_num(adc1_channel_t channel, gpio_num_t *gpio_num)
{
RTC_MODULE_CHECK(channel < ADC1_CHANNEL_MAX, "ADC Channel Err", ESP_ERR_INVALID_ARG);
switch (channel) {
case ADC1_CHANNEL_0:
*gpio_num = ADC1_CHANNEL_0_GPIO_NUM;
break;
case ADC1_CHANNEL_1:
*gpio_num = ADC1_CHANNEL_1_GPIO_NUM;
break;
case ADC1_CHANNEL_2:
*gpio_num = ADC1_CHANNEL_2_GPIO_NUM;
break;
case ADC1_CHANNEL_3:
*gpio_num = ADC1_CHANNEL_3_GPIO_NUM;
break;
case ADC1_CHANNEL_4:
*gpio_num = ADC1_CHANNEL_4_GPIO_NUM;
break;
case ADC1_CHANNEL_5:
*gpio_num = ADC1_CHANNEL_5_GPIO_NUM;
break;
case ADC1_CHANNEL_6:
*gpio_num = ADC1_CHANNEL_6_GPIO_NUM;
break;
case ADC1_CHANNEL_7:
*gpio_num = ADC1_CHANNEL_7_GPIO_NUM;
break;
default:
return ESP_ERR_INVALID_ARG;
}
return ESP_OK;
}
static esp_err_t adc1_pad_init(adc1_channel_t channel)
{
gpio_num_t gpio_num = 0;
ADC1_CHECK_FUNCTION_RET(adc1_pad_get_io_num(channel, &gpio_num));
ADC1_CHECK_FUNCTION_RET(rtc_gpio_init(gpio_num));
ADC1_CHECK_FUNCTION_RET(rtc_gpio_output_disable(gpio_num));
ADC1_CHECK_FUNCTION_RET(rtc_gpio_input_disable(gpio_num));
ADC1_CHECK_FUNCTION_RET(gpio_set_pull_mode(gpio_num, GPIO_FLOATING));
return ESP_OK;
}
esp_err_t adc1_config_channel_atten(adc1_channel_t channel, adc_atten_t atten)
{
RTC_MODULE_CHECK(channel < ADC1_CHANNEL_MAX, "ADC Channel Err", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(atten <= ADC_ATTEN_11db, "ADC Atten Err", ESP_ERR_INVALID_ARG);
adc1_pad_init(channel);
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_BITS(SENS_SAR_ATTEN1_REG, 3, atten, (channel * 2)); //SAR1_atten
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t adc1_config_width(adc_bits_width_t width_bit)
{
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_BITS(SENS_SAR_START_FORCE_REG, SENS_SAR1_BIT_WIDTH_V, width_bit, SENS_SAR1_BIT_WIDTH_S); //SAR2_BIT_WIDTH[1:0]=0x3, SAR1_BIT_WIDTH[1:0]=0x3
//Invert the adc value,the Output value is invert
SET_PERI_REG_MASK(SENS_SAR_READ_CTRL_REG, SENS_SAR1_DATA_INV);
//Set The adc sample width,invert adc value,must
SET_PERI_REG_BITS(SENS_SAR_READ_CTRL_REG, SENS_SAR1_SAMPLE_BIT_V, width_bit, SENS_SAR1_SAMPLE_BIT_S); //digital sar1_bit_width[1:0]=3
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
int adc1_get_raw(adc1_channel_t channel)
{
uint16_t adc_value;
RTC_MODULE_CHECK(channel < ADC1_CHANNEL_MAX, "ADC Channel Err", ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
//Adc Controler is Rtc module,not ulp coprocessor
SET_PERI_REG_BITS(SENS_SAR_MEAS_START1_REG, 1, 1, SENS_MEAS1_START_FORCE_S); //force pad mux and force start
//Bit1=0:Fsm Bit1=1(Bit0=0:PownDown Bit10=1:Powerup)
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S); //force XPD_SAR=0, use XPD_FSM
//Disable Amp Bit1=0:Fsm Bit1=1(Bit0=0:PownDown Bit10=1:Powerup)
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_AMP, 0x2, SENS_FORCE_XPD_AMP_S); //force XPD_AMP=0
//Open the ADC1 Data port Not ulp coprocessor
SET_PERI_REG_BITS(SENS_SAR_MEAS_START1_REG, 1, 1, SENS_SAR1_EN_PAD_FORCE_S); //open the ADC1 data port
//Select channel
SET_PERI_REG_BITS(SENS_SAR_MEAS_START1_REG, SENS_SAR1_EN_PAD, (1 << channel), SENS_SAR1_EN_PAD_S); //pad enable
SET_PERI_REG_BITS(SENS_SAR_MEAS_CTRL_REG, 0xfff, 0x0, SENS_AMP_RST_FB_FSM_S); //[11:8]:short ref ground, [7:4]:short ref, [3:0]:rst fb
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT1_REG, SENS_SAR_AMP_WAIT1, 0x1, SENS_SAR_AMP_WAIT1_S);
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT1_REG, SENS_SAR_AMP_WAIT2, 0x1, SENS_SAR_AMP_WAIT2_S);
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_SAR_AMP_WAIT3, 0x1, SENS_SAR_AMP_WAIT3_S);
while (GET_PERI_REG_BITS2(SENS_SAR_SLAVE_ADDR1_REG, 0x7, SENS_MEAS_STATUS_S) != 0); //wait det_fsm==0
SET_PERI_REG_BITS(SENS_SAR_MEAS_START1_REG, 1, 0, SENS_MEAS1_START_SAR_S); //start force 0
SET_PERI_REG_BITS(SENS_SAR_MEAS_START1_REG, 1, 1, SENS_MEAS1_START_SAR_S); //start force 1
while (GET_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_DONE_SAR) == 0) {}; //read done
adc_value = GET_PERI_REG_BITS2(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_DATA_SAR, SENS_MEAS1_DATA_SAR_S);
portEXIT_CRITICAL(&rtc_spinlock);
return adc_value;
}
int adc1_get_voltage(adc1_channel_t channel) //Deprecated. Use adc1_get_raw() instead
{
return adc1_get_raw(channel);
}
void adc1_ulp_enable(void)
{
portENTER_CRITICAL(&rtc_spinlock);
CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_START_FORCE);
CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_SAR1_EN_PAD_FORCE_M);
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_AMP, 0x2, SENS_FORCE_XPD_AMP_S);
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S);
SET_PERI_REG_BITS(SENS_SAR_MEAS_CTRL_REG, 0xfff, 0x0, SENS_AMP_RST_FB_FSM_S); //[11:8]:short ref ground, [7:4]:short ref, [3:0]:rst fb
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT1_REG, SENS_SAR_AMP_WAIT1, 0x1, SENS_SAR_AMP_WAIT1_S);
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT1_REG, SENS_SAR_AMP_WAIT2, 0x1, SENS_SAR_AMP_WAIT2_S);
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_SAR_AMP_WAIT3, 0x1, SENS_SAR_AMP_WAIT3_S);
portEXIT_CRITICAL(&rtc_spinlock);
}
esp_err_t adc2_vref_to_gpio(gpio_num_t gpio)
{
int channel;
if(gpio == GPIO_NUM_25){
channel = 8; //Channel 8 bit
}else if (gpio == GPIO_NUM_26){
channel = 9; //Channel 9 bit
}else if (gpio == GPIO_NUM_27){
channel = 7; //Channel 7 bit
}else{
return ESP_ERR_INVALID_ARG;
}
//Configure RTC gpio
rtc_gpio_init(gpio);
rtc_gpio_output_disable(gpio);
rtc_gpio_input_disable(gpio);
rtc_gpio_pullup_dis(gpio);
rtc_gpio_pulldown_dis(gpio);
SET_PERI_REG_BITS(RTC_CNTL_BIAS_CONF_REG, RTC_CNTL_DBG_ATTEN, 0, RTC_CNTL_DBG_ATTEN_S); //Check DBG effect outside sleep mode
//set dtest (MUX_SEL : 0 -> RTC; 1-> vdd_sar2)
SET_PERI_REG_BITS(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_DTEST_RTC, 1, RTC_CNTL_DTEST_RTC_S); //Config test mux to route v_ref to ADC2 Channels
//set ent
SET_PERI_REG_MASK(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_ENT_RTC_M);
//set sar2_en_test
SET_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_SAR2_EN_TEST_M);
//force fsm
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 3, SENS_FORCE_XPD_SAR_S); //Select power source of ADC
//set sar2 en force
SET_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_SAR2_EN_PAD_FORCE_M); //Pad bitmap controlled by SW
//set en_pad for channels 7,8,9 (bits 0x380)
SET_PERI_REG_BITS(SENS_SAR_MEAS_START2_REG, SENS_SAR2_EN_PAD, 1<<channel, SENS_SAR2_EN_PAD_S);
return ESP_OK;
}
/*---------------------------------------------------------------
DAC
---------------------------------------------------------------*/
static esp_err_t dac_pad_get_io_num(dac_channel_t channel, gpio_num_t *gpio_num)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(gpio_num, "Param null", ESP_ERR_INVALID_ARG);
switch (channel) {
case DAC_CHANNEL_1:
*gpio_num = DAC_CHANNEL_1_GPIO_NUM;
break;
case DAC_CHANNEL_2:
*gpio_num = DAC_CHANNEL_2_GPIO_NUM;
break;
default:
return ESP_ERR_INVALID_ARG;
}
return ESP_OK;
}
static esp_err_t dac_rtc_pad_init(dac_channel_t channel)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
gpio_num_t gpio_num = 0;
dac_pad_get_io_num(channel, &gpio_num);
rtc_gpio_init(gpio_num);
rtc_gpio_output_disable(gpio_num);
rtc_gpio_input_disable(gpio_num);
rtc_gpio_pullup_dis(gpio_num);
rtc_gpio_pulldown_dis(gpio_num);
return ESP_OK;
}
esp_err_t dac_output_enable(dac_channel_t channel)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
dac_rtc_pad_init(channel);
portENTER_CRITICAL(&rtc_spinlock);
if (channel == DAC_CHANNEL_1) {
SET_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC | RTC_IO_PDAC1_DAC_XPD_FORCE);
} else if (channel == DAC_CHANNEL_2) {
SET_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t dac_output_disable(dac_channel_t channel)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
if (channel == DAC_CHANNEL_1) {
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC | RTC_IO_PDAC1_DAC_XPD_FORCE);
} else if (channel == DAC_CHANNEL_2) {
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t dac_output_voltage(dac_channel_t channel, uint8_t dac_value)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
//Disable Tone
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_SW_TONE_EN);
//Disable Channel Tone
if (channel == DAC_CHANNEL_1) {
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN1_M);
} else if (channel == DAC_CHANNEL_2) {
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN2_M);
}
//Set the Dac value
if (channel == DAC_CHANNEL_1) {
SET_PERI_REG_BITS(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_DAC, dac_value, RTC_IO_PDAC1_DAC_S); //dac_output
} else if (channel == DAC_CHANNEL_2) {
SET_PERI_REG_BITS(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_DAC, dac_value, RTC_IO_PDAC2_DAC_S); //dac_output
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t dac_out_voltage(dac_channel_t channel, uint8_t dac_value)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
//Disable Tone
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_SW_TONE_EN);
//Disable Channel Tone
if (channel == DAC_CHANNEL_1) {
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN1_M);
} else if (channel == DAC_CHANNEL_2) {
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN2_M);
}
//Set the Dac value
if (channel == DAC_CHANNEL_1) {
SET_PERI_REG_BITS(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_DAC, dac_value, RTC_IO_PDAC1_DAC_S); //dac_output
} else if (channel == DAC_CHANNEL_2) {
SET_PERI_REG_BITS(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_DAC, dac_value, RTC_IO_PDAC2_DAC_S); //dac_output
}
portEXIT_CRITICAL(&rtc_spinlock);
//dac pad init
dac_rtc_pad_init(channel);
dac_output_enable(channel);
return ESP_OK;
}
esp_err_t dac_i2s_enable()
{
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_DAC_DIG_FORCE_M | SENS_DAC_CLK_INV_M);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t dac_i2s_disable()
{
portENTER_CRITICAL(&rtc_spinlock);
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_DAC_DIG_FORCE_M | SENS_DAC_CLK_INV_M);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
/*---------------------------------------------------------------
HALL SENSOR
---------------------------------------------------------------*/
static int hall_sensor_get_value() //hall sensor without LNA
{
int Sens_Vp0;
int Sens_Vn0;
int Sens_Vp1;
int Sens_Vn1;
int hall_value;
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_XPD_HALL_FORCE_M); // hall sens force enable
SET_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_XPD_HALL); // xpd hall
SET_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_HALL_PHASE_FORCE_M); // phase force
CLEAR_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_HALL_PHASE); // hall phase
Sens_Vp0 = adc1_get_raw(ADC1_CHANNEL_0);
Sens_Vn0 = adc1_get_raw(ADC1_CHANNEL_3);
SET_PERI_REG_MASK(RTC_IO_HALL_SENS_REG, RTC_IO_HALL_PHASE);
Sens_Vp1 = adc1_get_raw(ADC1_CHANNEL_0);
Sens_Vn1 = adc1_get_raw(ADC1_CHANNEL_3);
SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S);
CLEAR_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_XPD_HALL_FORCE);
CLEAR_PERI_REG_MASK(SENS_SAR_TOUCH_CTRL1_REG, SENS_HALL_PHASE_FORCE);
portEXIT_CRITICAL(&rtc_spinlock);
hall_value = (Sens_Vp1 - Sens_Vp0) - (Sens_Vn1 - Sens_Vn0);
return hall_value;
}
int hall_sensor_read()
{
adc1_pad_init(ADC1_CHANNEL_0);
adc1_pad_init(ADC1_CHANNEL_3);
adc1_config_channel_atten(ADC1_CHANNEL_0, ADC_ATTEN_0db);
adc1_config_channel_atten(ADC1_CHANNEL_3, ADC_ATTEN_0db);
return hall_sensor_get_value();
}
/*---------------------------------------------------------------
INTERRUPT HANDLER
---------------------------------------------------------------*/
typedef struct rtc_isr_handler_ {
uint32_t mask;
intr_handler_t handler;
void* handler_arg;
SLIST_ENTRY(rtc_isr_handler_) next;
} rtc_isr_handler_t;
static SLIST_HEAD(rtc_isr_handler_list_, rtc_isr_handler_) s_rtc_isr_handler_list =
SLIST_HEAD_INITIALIZER(s_rtc_isr_handler_list);
portMUX_TYPE s_rtc_isr_handler_list_lock = portMUX_INITIALIZER_UNLOCKED;
static intr_handle_t s_rtc_isr_handle;
static void rtc_isr(void* arg)
{
uint32_t status = REG_READ(RTC_CNTL_INT_ST_REG);
rtc_isr_handler_t* it;
portENTER_CRITICAL(&s_rtc_isr_handler_list_lock);
SLIST_FOREACH(it, &s_rtc_isr_handler_list, next) {
if (it->mask & status) {
portEXIT_CRITICAL(&s_rtc_isr_handler_list_lock);
(*it->handler)(it->handler_arg);
portENTER_CRITICAL(&s_rtc_isr_handler_list_lock);
}
}
portEXIT_CRITICAL(&s_rtc_isr_handler_list_lock);
REG_WRITE(RTC_CNTL_INT_CLR_REG, status);
}
static esp_err_t rtc_isr_ensure_installed()
{
esp_err_t err = ESP_OK;
portENTER_CRITICAL(&s_rtc_isr_handler_list_lock);
if (s_rtc_isr_handle) {
goto out;
}
REG_WRITE(RTC_CNTL_INT_ENA_REG, 0);
REG_WRITE(RTC_CNTL_INT_CLR_REG, UINT32_MAX);
err = esp_intr_alloc(ETS_RTC_CORE_INTR_SOURCE, 0, &rtc_isr, NULL, &s_rtc_isr_handle);
if (err != ESP_OK) {
goto out;
}
out:
portEXIT_CRITICAL(&s_rtc_isr_handler_list_lock);
return err;
}
esp_err_t rtc_isr_register(intr_handler_t handler, void* handler_arg, uint32_t rtc_intr_mask)
{
esp_err_t err = rtc_isr_ensure_installed();
if (err != ESP_OK) {
return err;
}
rtc_isr_handler_t* item = malloc(sizeof(*item));
if (item == NULL) {
return ESP_ERR_NO_MEM;
}
item->handler = handler;
item->handler_arg = handler_arg;
item->mask = rtc_intr_mask;
portENTER_CRITICAL(&s_rtc_isr_handler_list_lock);
SLIST_INSERT_HEAD(&s_rtc_isr_handler_list, item, next);
portEXIT_CRITICAL(&s_rtc_isr_handler_list_lock);
return ESP_OK;
}
esp_err_t rtc_isr_deregister(intr_handler_t handler, void* handler_arg)
{
rtc_isr_handler_t* it;
rtc_isr_handler_t* prev = NULL;
bool found = false;
portENTER_CRITICAL(&s_rtc_isr_handler_list_lock);
SLIST_FOREACH(it, &s_rtc_isr_handler_list, next) {
if (it->handler == handler && it->handler_arg == handler_arg) {
if (it == SLIST_FIRST(&s_rtc_isr_handler_list)) {
SLIST_REMOVE_HEAD(&s_rtc_isr_handler_list, next);
} else {
SLIST_REMOVE_AFTER(prev, next);
}
found = true;
break;
}
prev = it;
}
portEXIT_CRITICAL(&s_rtc_isr_handler_list_lock);
return found ? ESP_OK : ESP_ERR_INVALID_STATE;
}
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