1 /*
2 * SPDX-FileCopyrightText: 2016-2021 Espressif Systems (Shanghai) CO LTD
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <stdlib.h>
8 #include <ctype.h>
9 #include "sdkconfig.h"
10 #include "esp_types.h"
11 #include "esp_log.h"
12 #include "sys/lock.h"
13 #include "soc/soc_pins.h"
14 #include "freertos/FreeRTOS.h"
15 #include "freertos/semphr.h"
16 #include "freertos/timers.h"
17 #include "esp_intr_alloc.h"
18 #include "driver/rtc_io.h"
19 #include "driver/touch_pad.h"
20 #include "driver/rtc_cntl.h"
21 #include "driver/gpio.h"
22 #include "hal/touch_sensor_types.h"
23 #include "hal/touch_sensor_hal.h"
24
25 static const char *TOUCH_TAG = "TOUCH_SENSOR";
26 #define TOUCH_CHECK(a, str, ret_val) ({ \
27 if (!(a)) { \
28 ESP_LOGE(TOUCH_TAG,"%s(%d): %s", __FUNCTION__, __LINE__, str); \
29 return (ret_val); \
30 } \
31 })
32 #ifdef CONFIG_IDF_TARGET_ESP32
33 #define TOUCH_CHANNEL_CHECK(channel) do { \
34 TOUCH_CHECK(channel < SOC_TOUCH_SENSOR_NUM && channel >= 0, "Touch channel error", ESP_ERR_INVALID_ARG); \
35 } while (0);
36 #else // !CONFIG_IDF_TARGET_ESP32
37 #define TOUCH_CHANNEL_CHECK(channel) do { \
38 TOUCH_CHECK(channel < SOC_TOUCH_SENSOR_NUM && channel >= 0, "Touch channel error", ESP_ERR_INVALID_ARG); \
39 TOUCH_CHECK(channel != SOC_TOUCH_DENOISE_CHANNEL, "TOUCH0 is internal denoise channel", ESP_ERR_INVALID_ARG); \
40 } while (0);
41 #endif // CONFIG_IDF_TARGET_ESP32
42
43 #define TOUCH_GET_IO_NUM(channel) (touch_sensor_channel_io_map[channel])
44
45 _Static_assert(TOUCH_PAD_MAX == SOC_TOUCH_SENSOR_NUM, "Touch sensor channel number not equal to chip capabilities");
46
47 extern portMUX_TYPE rtc_spinlock; //TODO: Will be placed in the appropriate position after the rtc module is finished.
48 #define TOUCH_ENTER_CRITICAL() portENTER_CRITICAL(&rtc_spinlock)
49 #define TOUCH_EXIT_CRITICAL() portEXIT_CRITICAL(&rtc_spinlock)
50
touch_pad_isr_deregister(intr_handler_t fn,void * arg)51 esp_err_t touch_pad_isr_deregister(intr_handler_t fn, void *arg)
52 {
53 return rtc_isr_deregister(fn, arg);
54 }
55
touch_pad_set_voltage(touch_high_volt_t refh,touch_low_volt_t refl,touch_volt_atten_t atten)56 esp_err_t touch_pad_set_voltage(touch_high_volt_t refh, touch_low_volt_t refl, touch_volt_atten_t atten)
57 {
58 TOUCH_CHECK(((refh < TOUCH_HVOLT_MAX) && (refh >= (int )TOUCH_HVOLT_KEEP)), "touch refh error",
59 ESP_ERR_INVALID_ARG);
60 TOUCH_CHECK(((refl < TOUCH_LVOLT_MAX) && (refh >= (int )TOUCH_LVOLT_KEEP)), "touch refl error",
61 ESP_ERR_INVALID_ARG);
62 TOUCH_CHECK(((atten < TOUCH_HVOLT_ATTEN_MAX) && (refh >= (int )TOUCH_HVOLT_ATTEN_KEEP)), "touch atten error",
63 ESP_ERR_INVALID_ARG);
64
65 const touch_hal_volt_t volt = {
66 .refh = refh,
67 .refl = refl,
68 .atten = atten,
69 };
70 TOUCH_ENTER_CRITICAL();
71 touch_hal_set_voltage(&volt);
72 TOUCH_EXIT_CRITICAL();
73
74 return ESP_OK;
75 }
76
touch_pad_get_voltage(touch_high_volt_t * refh,touch_low_volt_t * refl,touch_volt_atten_t * atten)77 esp_err_t touch_pad_get_voltage(touch_high_volt_t *refh, touch_low_volt_t *refl, touch_volt_atten_t *atten)
78 {
79 touch_hal_volt_t volt = {0};
80 TOUCH_ENTER_CRITICAL();
81 touch_hal_get_voltage(&volt);
82 TOUCH_EXIT_CRITICAL();
83 *refh = volt.refh;
84 *refl = volt.refl;
85 *atten = volt.atten;
86
87 return ESP_OK;
88 }
89
touch_pad_set_cnt_mode(touch_pad_t touch_num,touch_cnt_slope_t slope,touch_tie_opt_t opt)90 esp_err_t touch_pad_set_cnt_mode(touch_pad_t touch_num, touch_cnt_slope_t slope, touch_tie_opt_t opt)
91 {
92 TOUCH_CHECK(touch_num < SOC_TOUCH_SENSOR_NUM, "Touch channel error", ESP_ERR_INVALID_ARG);
93 TOUCH_CHECK(slope < TOUCH_PAD_SLOPE_MAX, "touch slope error", ESP_ERR_INVALID_ARG);
94 TOUCH_CHECK(opt < TOUCH_PAD_TIE_OPT_MAX, "touch opt error", ESP_ERR_INVALID_ARG);
95
96 const touch_hal_meas_mode_t meas = {
97 .slope = slope,
98 .tie_opt = opt,
99 };
100 TOUCH_ENTER_CRITICAL();
101 touch_hal_set_meas_mode(touch_num, &meas);
102 TOUCH_EXIT_CRITICAL();
103
104 return ESP_OK;
105 }
106
touch_pad_get_cnt_mode(touch_pad_t touch_num,touch_cnt_slope_t * slope,touch_tie_opt_t * opt)107 esp_err_t touch_pad_get_cnt_mode(touch_pad_t touch_num, touch_cnt_slope_t *slope, touch_tie_opt_t *opt)
108 {
109 TOUCH_CHECK(touch_num < SOC_TOUCH_SENSOR_NUM, "Touch channel error", ESP_ERR_INVALID_ARG);
110
111 touch_hal_meas_mode_t meas = {0};
112 TOUCH_ENTER_CRITICAL();
113 touch_hal_get_meas_mode(touch_num, &meas);
114 TOUCH_EXIT_CRITICAL();
115 *slope = meas.slope;
116 *opt = meas.tie_opt;
117
118 return ESP_OK;
119 }
120
touch_pad_io_init(touch_pad_t touch_num)121 esp_err_t touch_pad_io_init(touch_pad_t touch_num)
122 {
123 TOUCH_CHANNEL_CHECK(touch_num);
124 gpio_num_t gpio_num = TOUCH_GET_IO_NUM(touch_num);
125 rtc_gpio_init(gpio_num);
126 rtc_gpio_set_direction(gpio_num, RTC_GPIO_MODE_DISABLED);
127 rtc_gpio_pulldown_dis(gpio_num);
128 rtc_gpio_pullup_dis(gpio_num);
129 return ESP_OK;
130 }
131
touch_pad_fsm_start(void)132 esp_err_t touch_pad_fsm_start(void)
133 {
134 TOUCH_ENTER_CRITICAL();
135 touch_hal_start_fsm();
136 TOUCH_EXIT_CRITICAL();
137 return ESP_OK;
138 }
139
touch_pad_fsm_stop(void)140 esp_err_t touch_pad_fsm_stop(void)
141 {
142 TOUCH_ENTER_CRITICAL();
143 touch_hal_stop_fsm();
144 TOUCH_EXIT_CRITICAL();
145 return ESP_OK;
146 }
147
touch_pad_set_fsm_mode(touch_fsm_mode_t mode)148 esp_err_t touch_pad_set_fsm_mode(touch_fsm_mode_t mode)
149 {
150 TOUCH_CHECK((mode < TOUCH_FSM_MODE_MAX), "touch fsm mode error", ESP_ERR_INVALID_ARG);
151
152 TOUCH_ENTER_CRITICAL();
153 touch_hal_set_fsm_mode(mode);
154 TOUCH_EXIT_CRITICAL();
155 #ifdef CONFIG_IDF_TARGET_ESP32
156 if (mode == TOUCH_FSM_MODE_TIMER) {
157 touch_pad_fsm_start();
158 } else {
159 touch_pad_fsm_stop();
160 }
161 #endif
162 return ESP_OK;
163 }
164
touch_pad_get_fsm_mode(touch_fsm_mode_t * mode)165 esp_err_t touch_pad_get_fsm_mode(touch_fsm_mode_t *mode)
166 {
167 touch_hal_get_fsm_mode(mode);
168 return ESP_OK;
169 }
170
touch_pad_sw_start(void)171 esp_err_t touch_pad_sw_start(void)
172 {
173 TOUCH_ENTER_CRITICAL();
174 touch_hal_start_sw_meas();
175 TOUCH_EXIT_CRITICAL();
176 return ESP_OK;
177 }
178
179 #ifdef CONFIG_IDF_TARGET_ESP32
touch_pad_set_thresh(touch_pad_t touch_num,uint16_t threshold)180 esp_err_t touch_pad_set_thresh(touch_pad_t touch_num, uint16_t threshold)
181 {
182 TOUCH_CHANNEL_CHECK(touch_num);
183 TOUCH_ENTER_CRITICAL();
184 touch_hal_set_threshold(touch_num, threshold);
185 TOUCH_EXIT_CRITICAL();
186 return ESP_OK;
187 }
188 #else // !CONFIG_IDF_TARGET_ESP32
touch_pad_set_thresh(touch_pad_t touch_num,uint32_t threshold)189 esp_err_t touch_pad_set_thresh(touch_pad_t touch_num, uint32_t threshold)
190 {
191 TOUCH_CHANNEL_CHECK(touch_num);
192 TOUCH_CHECK(touch_num != SOC_TOUCH_DENOISE_CHANNEL,
193 "TOUCH0 is internal denoise channel", ESP_ERR_INVALID_ARG);
194 TOUCH_ENTER_CRITICAL();
195 touch_hal_set_threshold(touch_num, threshold);
196 TOUCH_EXIT_CRITICAL();
197 return ESP_OK;
198 }
199 #endif // CONFIG_IDF_TARGET_ESP32
200
201 #ifdef CONFIG_IDF_TARGET_ESP32
touch_pad_get_thresh(touch_pad_t touch_num,uint16_t * threshold)202 esp_err_t touch_pad_get_thresh(touch_pad_t touch_num, uint16_t *threshold)
203 {
204 TOUCH_CHANNEL_CHECK(touch_num);
205 touch_hal_get_threshold(touch_num, threshold);
206 return ESP_OK;
207 }
208 #else // !CONFIG_IDF_TARGET_ESP32
touch_pad_get_thresh(touch_pad_t touch_num,uint32_t * threshold)209 esp_err_t touch_pad_get_thresh(touch_pad_t touch_num, uint32_t *threshold)
210 {
211 TOUCH_CHANNEL_CHECK(touch_num);
212 TOUCH_CHECK(touch_num != SOC_TOUCH_DENOISE_CHANNEL,
213 "TOUCH0 is internal denoise channel", ESP_ERR_INVALID_ARG);
214 touch_hal_get_threshold(touch_num, threshold);
215 return ESP_OK;
216 }
217 #endif // CONFIG_IDF_TARGET_ESP32
218
touch_pad_get_wakeup_status(touch_pad_t * pad_num)219 esp_err_t touch_pad_get_wakeup_status(touch_pad_t *pad_num)
220 {
221 touch_hal_get_wakeup_status(pad_num);
222 TOUCH_CHANNEL_CHECK(*pad_num);
223 return ESP_OK;
224 }
225
touch_pad_get_status(void)226 uint32_t IRAM_ATTR touch_pad_get_status(void)
227 {
228 uint32_t status = 0;
229 touch_hal_read_trigger_status_mask(&status);
230 return status;
231 }
232
touch_pad_clear_status(void)233 esp_err_t IRAM_ATTR touch_pad_clear_status(void)
234 {
235 touch_hal_clear_trigger_status_mask();
236 return ESP_OK;
237 }
238
