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https://github.com/RIOT-OS/RIOT.git
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6a652513c1
Functions that are used by ADC and DAC peripherals are moved to a new submodule periph_adc_ctrl. This is necessary to compile separate submodules for ADC and DAC.
252 lines
10 KiB
C
252 lines
10 KiB
C
/*
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* Copyright (C) 2019 Gunar Schorcht
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @ingroup cpu_esp32
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* @{
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*
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* @file
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* @brief ADC controller functions used by ADC and DAC peripherals
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*
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* @author Gunar Schorcht <gunar@schorcht.net>
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*
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* @}
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*/
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#include "board.h"
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#include "adc_ctrl.h"
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#include "esp_common.h"
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#include "soc/rtc_io_struct.h"
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#include "soc/rtc_cntl_struct.h"
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#include "soc/sens_reg.h"
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#include "soc/sens_struct.h"
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#define ENABLE_DEBUG (0)
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#include "debug.h"
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/**
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* @brief RTC hardware map
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*
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* The index corresponds to RTC pin type _rtcio_pin_t (Table 19 in Technical
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* Reference)
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*/
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const struct _adc_hw_t _adc_hw[] =
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{
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/* gpio rtc_gpio adc_ctrl adc_channel, pad_name */
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{ GPIO4, 10, ADC2_CTRL, 0, "GPIO4" }, /* RTCIO_TOUCH0 */
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{ GPIO0, 11, ADC2_CTRL, 1, "GPIO0" }, /* RTCIO_TOUCH1 */
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{ GPIO2, 12, ADC2_CTRL, 2, "GPIO2" }, /* RTCIO_TOUCH2 */
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{ GPIO15, 13, ADC2_CTRL, 3, "MTDO" }, /* RTCIO_TOUCH3 */
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{ GPIO13, 14, ADC2_CTRL, 4, "MTCK" }, /* RTCIO_TOUCH4 */
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{ GPIO12, 15, ADC2_CTRL, 5, "MTDI" }, /* RTCIO_TOUCH5 */
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{ GPIO14, 16, ADC2_CTRL, 6, "MTMS" }, /* RTCIO_TOUCH6 */
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{ GPIO27, 17, ADC2_CTRL, 7, "GPIO27" }, /* RTCIO_TOUCH7 */
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{ GPIO33, 8, ADC1_CTRL, 5, "32K_XN" }, /* RTCIO_TOUCH8 */
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{ GPIO32, 9, ADC1_CTRL, 4, "32K_XP" }, /* RTCIO_TOUCH9 */
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{ GPIO34, 4, ADC1_CTRL, 6, "VDET_1" }, /* RTCIO_ADC_ADC1 */
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{ GPIO35, 5, ADC1_CTRL, 7, "VDET_2" }, /* RTCIO_ADC_ADC2 */
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{ GPIO36, 0, ADC1_CTRL, 0, "SENSOR_VP" }, /* RTCIO_SENSOR_SENSE1 */
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{ GPIO37, 1, ADC1_CTRL, 1, "SENSOR_CAPP" }, /* RTCIO_SENSOR_SENSE2 */
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{ GPIO38, 2, ADC1_CTRL, 2, "SENSOR_CAPN" }, /* RTCIO_SENSOR_SENSE3 */
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{ GPIO39, 3, ADC1_CTRL, 3, "SENSOR_VN" }, /* RTCIO_SENSOR_SENSE4 */
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{ GPIO25, 6, ADC2_CTRL, 8, "GPIO25" }, /* RTCIO_DAC1 */
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{ GPIO26, 7, ADC2_CTRL, 9, "GPIO26" } /* RTCIO_DAC2 */
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};
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/* maps GPIO pin to RTC pin, this index is used to access ADC hardware table
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(Table 19 in Technical Reference) */
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const gpio_t _gpio_rtcio_map[] = {
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RTCIO_TOUCH1, /* GPIO0 */
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RTCIO_NA , /* GPIO1 */
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RTCIO_TOUCH2, /* GPIO2 */
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RTCIO_NA, /* GPIO3 */
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RTCIO_TOUCH0, /* GPIO4 */
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RTCIO_NA, /* GPIO5 */
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RTCIO_NA, /* GPIO6 */
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RTCIO_NA, /* GPIO7 */
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RTCIO_NA, /* GPIO8 */
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RTCIO_NA, /* GPIO9 */
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RTCIO_NA, /* GPIO10 */
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RTCIO_NA, /* GPIO11 */
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RTCIO_TOUCH5, /* GPIO12 MTDI */
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RTCIO_TOUCH4, /* GPIO13 MTCK */
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RTCIO_TOUCH6, /* GPIO14 MTMS */
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RTCIO_TOUCH3, /* GPIO15 MTDO */
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RTCIO_NA, /* GPIO16 */
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RTCIO_NA, /* GPIO17 */
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RTCIO_NA, /* GPIO18 */
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RTCIO_NA, /* GPIO19 */
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RTCIO_NA, /* GPIO20 */
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RTCIO_NA, /* GPIO21 */
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RTCIO_NA, /* GPIO22 */
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RTCIO_NA, /* GPIO23 */
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RTCIO_NA, /* GPIO24 */
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RTCIO_DAC1, /* GPIO25 */
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RTCIO_DAC2, /* GPIO26 */
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RTCIO_TOUCH7, /* GPIO27 */
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RTCIO_NA, /* GPIO28 */
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RTCIO_NA, /* GPIO29 */
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RTCIO_NA, /* GPIO30 */
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RTCIO_NA, /* GPIO31 */
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RTCIO_TOUCH9, /* GPIO32 32K_XP */
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RTCIO_TOUCH8, /* GPIO33 32K_XN */
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RTCIO_ADC_ADC1, /* GPIO34 VDET_1 */
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RTCIO_ADC_ADC2, /* GPIO35 VDET_2 */
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RTCIO_SENSOR_SENSE1, /* GPIO36 SENSOR_VP */
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RTCIO_SENSOR_SENSE2, /* GPIO37 SENSOR_CAPP */
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RTCIO_SENSOR_SENSE3, /* GPIO38 SENSOR_CAPN */
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RTCIO_SENSOR_SENSE4, /* GPIO39 SENSOR_VN */
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};
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/* flags to indicate whether the according controller is already initialized */
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static bool _adc1_ctrl_initialized = false;
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static bool _adc2_ctrl_initialized = false;
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void _adc1_ctrl_init(void)
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{
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/* return if already intialized */
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if (_adc1_ctrl_initialized) {
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return;
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}
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/* always power on */
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SENS.sar_meas_wait2.force_xpd_sar = SENS_FORCE_XPD_SAR_PU;
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/* power off LN amp */
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SENS.sar_meas_wait2.sar2_rstb_wait = 2;
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SENS.sar_meas_ctrl.amp_rst_fb_fsm = 0;
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SENS.sar_meas_ctrl.amp_short_ref_fsm = 0;
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SENS.sar_meas_ctrl.amp_short_ref_gnd_fsm = 0;
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SENS.sar_meas_wait1.sar_amp_wait1 = 1;
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SENS.sar_meas_wait1.sar_amp_wait2 = 1;
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SENS.sar_meas_wait2.sar_amp_wait3 = 1;
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SENS.sar_meas_wait2.force_xpd_amp = SENS_FORCE_XPD_AMP_PD;
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/* SAR ADC1 controller configuration */
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SENS.sar_read_ctrl.sar1_dig_force = 0; /* SAR ADC1 controlled by RTC */
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SENS.sar_meas_start1.meas1_start_force = 1; /* SAR ADC1 started by SW */
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SENS.sar_meas_start1.sar1_en_pad_force = 1; /* pad enable bitmap controlled by SW */
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SENS.sar_touch_ctrl1.xpd_hall_force = 1; /* XPD HALL is controlled by SW */
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SENS.sar_touch_ctrl1.hall_phase_force = 1; /* HALL PHASE is controlled by SW */
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SENS.sar_read_ctrl.sar1_data_inv = 1; /* invert data */
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SENS.sar_atten1 = 0xffffffff; /* set attenuation to 11 dB for all pads
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(input range 0 ... 3,3 V) */
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/* power off built-in hall sensor */
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RTCIO.hall_sens.xpd_hall = 0;
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/* set default resolution */
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SENS.sar_start_force.sar1_bit_width = ADC_RES_12BIT;
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SENS.sar_read_ctrl.sar1_sample_bit = ADC_RES_12BIT;
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_adc1_ctrl_initialized = true;
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}
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void _adc2_ctrl_init(void)
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{
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/* return if already intialized */
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if (_adc2_ctrl_initialized) {
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return;
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}
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/* SAR ADC2 controller configuration */
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SENS.sar_read_ctrl2.sar2_dig_force = 0; /* SAR ADC2 controlled by RTC not DIG*/
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SENS.sar_meas_start2.meas2_start_force = 1; /* SAR ADC2 started by SW */
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SENS.sar_meas_start2.sar2_en_pad_force = 1; /* pad enable bitmap controlled by SW */
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SENS.sar_read_ctrl2.sar2_data_inv = 1; /* invert data */
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SENS.sar_atten2 = 0xffffffff; /* set attenuation to 11 dB for all pads
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(input range 0 ... 3,3 V) */
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/* set default resolution */
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SENS.sar_start_force.sar2_bit_width = ADC_RES_12BIT;
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SENS.sar_read_ctrl2.sar2_sample_bit = ADC_RES_12BIT;
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_adc2_ctrl_initialized = true;
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}
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int rtcio_config_sleep_mode (gpio_t pin, bool mode, bool input)
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{
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CHECK_PARAM_RET(pin < GPIO_PIN_NUMOF, -1);
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uint8_t rtcio = _gpio_rtcio_map[pin];
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uint8_t idx;
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/* route pads to RTC and if possible, disable input, pull-up/pull-down */
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switch (rtcio) {
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case RTCIO_SENSOR_SENSE1: /* GPIO36, RTC0 */
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RTCIO.sensor_pads.sense1_mux_sel = 1; /* route to RTC */
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RTCIO.sensor_pads.sense1_fun_sel = 0; /* RTC mux function 0 */
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RTCIO.sensor_pads.sense1_slp_sel = mode; /* sleep mode */
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RTCIO.sensor_pads.sense1_slp_ie = input; /* input enabled */
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break;
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case RTCIO_SENSOR_SENSE2: /* GPIO37, RTC1 */
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RTCIO.sensor_pads.sense2_mux_sel = 1; /* route to RTC */
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RTCIO.sensor_pads.sense2_fun_sel = 0; /* RTC mux function 0 */
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RTCIO.sensor_pads.sense2_slp_sel = mode; /* sleep mode */
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RTCIO.sensor_pads.sense2_slp_ie = input; /* input enabled */
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break;
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case RTCIO_SENSOR_SENSE3: /* GPIO38, RTC2 */
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RTCIO.sensor_pads.sense3_mux_sel = 1; /* route to RTC */
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RTCIO.sensor_pads.sense3_fun_sel = 0; /* RTC mux function 0 */
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RTCIO.sensor_pads.sense3_slp_sel = mode; /* sleep mode */
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RTCIO.sensor_pads.sense3_slp_ie = input; /* input enabled */
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break;
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case RTCIO_SENSOR_SENSE4: /* GPIO39, RTC3 */
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RTCIO.sensor_pads.sense4_mux_sel = 1; /* route to RTC */
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RTCIO.sensor_pads.sense4_fun_sel = 0; /* RTC mux function 0 */
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RTCIO.sensor_pads.sense4_slp_sel = mode; /* sleep mode */
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RTCIO.sensor_pads.sense4_slp_ie = input; /* input enabled */
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break;
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case RTCIO_TOUCH0: /* GPIO4, RTC10 */
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case RTCIO_TOUCH1: /* GPIO0, RTC11 */
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case RTCIO_TOUCH2: /* GPIO2, RTC12 */
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case RTCIO_TOUCH3: /* GPIO15, RTC13 */
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case RTCIO_TOUCH4: /* GPIO13, RTC14 */
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case RTCIO_TOUCH5: /* GPIO12, RTC15 */
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case RTCIO_TOUCH6: /* GPIO14, RTC16 */
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case RTCIO_TOUCH7: /* GPIO27, RTC17 */
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case RTCIO_TOUCH8: /* GPIO33, RTC8 */
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case RTCIO_TOUCH9: /* GPIO32, RTC9 */
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idx = rtcio - RTCIO_TOUCH0;
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RTCIO.touch_pad[idx].mux_sel = 1; /* route to RTC */
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RTCIO.touch_pad[idx].fun_sel = 0; /* RTC mux function 0 */
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RTCIO.touch_pad[idx].slp_sel = mode; /* sleep mode */
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RTCIO.touch_pad[idx].slp_ie = input; /* input enabled */
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RTCIO.touch_pad[idx].slp_oe = ~input; /* output enabled*/
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break;
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case RTCIO_ADC_ADC1: /* GPIO34, RTC4 */
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RTCIO.adc_pad.adc1_mux_sel = 1; /* route to RTC */
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RTCIO.adc_pad.adc1_fun_sel = 0; /* RTC mux function 0 */
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RTCIO.adc_pad.adc1_slp_sel = mode; /* sleep mode */
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RTCIO.adc_pad.adc1_slp_ie = input; /* input enabled */
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break;
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case RTCIO_ADC_ADC2: /* GPIO35, RTC5 */
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RTCIO.adc_pad.adc2_mux_sel = 1; /* route to RTC */
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RTCIO.adc_pad.adc2_fun_sel = 0; /* RTC mux function 0 */
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RTCIO.adc_pad.adc2_slp_sel = mode; /* sleep mode */
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RTCIO.adc_pad.adc2_slp_ie = input; /* input enabled */
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break;
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case RTCIO_DAC1: /* GPIO25, RTC6 */
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case RTCIO_DAC2: /* GPIO26, RTC7 */
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idx = rtcio - RTCIO_DAC1;
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RTCIO.pad_dac[idx].mux_sel = 1; /* route to RTC */
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RTCIO.pad_dac[idx].fun_sel = 0; /* RTC mux function 0 */
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RTCIO.pad_dac[idx].slp_sel = mode; /* sleep mode */
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RTCIO.pad_dac[idx].slp_ie = input; /* input enabled */
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RTCIO.pad_dac[idx].slp_oe = ~input; /* output enabled*/
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break;
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default:
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LOG_TAG_ERROR("gpio", "GPIO %d is not an RTCIO pin and "
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"cannot be used in sleep mode\n", pin);
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return -1;
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}
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return 0;
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}
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