led.c 5.4 KB

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  1. /*
  2. This example code is in the Public Domain (or CC0 licensed, at your option.)
  3. Unless required by applicable law or agreed to in writing, this
  4. software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  5. CONDITIONS OF ANY KIND, either express or implied.
  6. */
  7. #include <stdio.h>
  8. #include <stdlib.h>
  9. #include <unistd.h>
  10. #include <string.h>
  11. #include "freertos/FreeRTOS.h"
  12. #include "freertos/task.h"
  13. #include "freertos/timers.h"
  14. #include "esp_system.h"
  15. #include "esp_log.h"
  16. #include "driver/gpio.h"
  17. #include "led.h"
  18. #include "accessors.h"
  19. #define MAX_LED 8
  20. #define BLOCKTIME 10 // up to portMAX_DELAY
  21. static const char *TAG = "led";
  22. static struct led_s {
  23. gpio_num_t gpio;
  24. bool on;
  25. int onstate;
  26. int ontime, offtime;
  27. int pushedon, pushedoff;
  28. bool pushed;
  29. TimerHandle_t timer;
  30. } leds[MAX_LED];
  31. static struct {
  32. int gpio;
  33. int active;
  34. } green = { CONFIG_LED_GREEN_GPIO, 0 },
  35. red = { CONFIG_LED_RED_GPIO, 0 };
  36. /****************************************************************************************
  37. *
  38. */
  39. static void vCallbackFunction( TimerHandle_t xTimer ) {
  40. struct led_s *led = (struct led_s*) pvTimerGetTimerID (xTimer);
  41. if (!led->timer) return;
  42. led->on = !led->on;
  43. ESP_LOGD(TAG,"led vCallbackFunction setting gpio %d level", led->gpio);
  44. gpio_set_level(led->gpio, led->on ? led->onstate : !led->onstate);
  45. // was just on for a while
  46. if (!led->on && led->offtime == -1) return;
  47. // regular blinking
  48. xTimerChangePeriod(xTimer, (led->on ? led->ontime : led->offtime) / portTICK_RATE_MS, BLOCKTIME);
  49. }
  50. /****************************************************************************************
  51. *
  52. */
  53. bool led_blink_core(int idx, int ontime, int offtime, bool pushed) {
  54. if (!leds[idx].gpio || leds[idx].gpio<0 ) return false;
  55. ESP_LOGD(TAG,"led_blink_core");
  56. if (leds[idx].timer) {
  57. // normal requests waits if a pop is pending
  58. if (!pushed && leds[idx].pushed) {
  59. leds[idx].pushedon = ontime;
  60. leds[idx].pushedoff = offtime;
  61. return true;
  62. }
  63. xTimerStop(leds[idx].timer, BLOCKTIME);
  64. }
  65. // save current state if not already pushed
  66. if (!leds[idx].pushed) {
  67. leds[idx].pushedon = leds[idx].ontime;
  68. leds[idx].pushedoff = leds[idx].offtime;
  69. leds[idx].pushed = pushed;
  70. }
  71. // then set new one
  72. leds[idx].ontime = ontime;
  73. leds[idx].offtime = offtime;
  74. if (ontime == 0) {
  75. ESP_LOGD(TAG,"led %d, setting reverse level", idx);
  76. gpio_set_level(leds[idx].gpio, !leds[idx].onstate);
  77. } else if (offtime == 0) {
  78. ESP_LOGD(TAG,"led %d, setting level", idx);
  79. gpio_set_level(leds[idx].gpio, leds[idx].onstate);
  80. } else {
  81. if (!leds[idx].timer) {
  82. ESP_LOGD(TAG,"led %d, Creating timer", idx);
  83. leds[idx].timer = xTimerCreate("ledTimer", ontime / portTICK_RATE_MS, pdFALSE, (void *)&leds[idx], vCallbackFunction);
  84. }
  85. leds[idx].on = true;
  86. ESP_LOGD(TAG,"led %d, Setting gpio %d", idx, leds[idx].gpio);
  87. gpio_set_level(leds[idx].gpio, leds[idx].onstate);
  88. ESP_LOGD(TAG,"led %d, Starting timer.", idx);
  89. if (xTimerStart(leds[idx].timer, BLOCKTIME) == pdFAIL) return false;
  90. }
  91. ESP_LOGD(TAG,"led %d, led_blink_core_done", idx);
  92. return true;
  93. }
  94. /****************************************************************************************
  95. *
  96. */
  97. bool led_unpush(int idx) {
  98. if (!leds[idx].gpio || leds[idx].gpio<0) return false;
  99. led_blink_core(idx, leds[idx].pushedon, leds[idx].pushedoff, true);
  100. leds[idx].pushed = false;
  101. return true;
  102. }
  103. /****************************************************************************************
  104. *
  105. */
  106. bool led_config(int idx, gpio_num_t gpio, int onstate) {
  107. if(gpio<0){
  108. ESP_LOGW(TAG,"LED GPIO not configured");
  109. return false;
  110. }
  111. ESP_LOGD(TAG,"Index %d, GPIO %d, on state %s", idx, gpio, onstate>0?"On":"Off");
  112. if (idx >= MAX_LED) return false;
  113. leds[idx].gpio = gpio;
  114. leds[idx].onstate = onstate;
  115. ESP_LOGD(TAG,"Index %d, GPIO %d, on state %s. Selecting GPIO pad", idx, gpio, onstate>0?"On":"Off");
  116. gpio_pad_select_gpio(gpio);
  117. ESP_LOGD(TAG,"Index %d, GPIO %d, on state %s. Setting direction to OUTPUT", idx, gpio, onstate>0?"On":"Off");
  118. gpio_set_direction(gpio, GPIO_MODE_OUTPUT);
  119. ESP_LOGD(TAG,"Index %d, GPIO %d, on state %s. Setting State to %d", idx, gpio, onstate>0?"On":"Off", onstate);
  120. gpio_set_level(gpio, !onstate);
  121. ESP_LOGD(TAG,"Done configuring the led");
  122. return true;
  123. }
  124. /****************************************************************************************
  125. *
  126. */
  127. bool led_unconfig(int idx) {
  128. if (idx >= MAX_LED) return false;
  129. if (leds[idx].timer) xTimerDelete(leds[idx].timer, BLOCKTIME);
  130. leds[idx].timer = NULL;
  131. return true;
  132. }
  133. /****************************************************************************************
  134. *
  135. */
  136. void set_led_gpio(int gpio, char *value) {
  137. char *p;
  138. if (strcasestr(value, "green")) {
  139. green.gpio = gpio;
  140. if ((p = strchr(value, ':')) != NULL) green.active = atoi(p + 1);
  141. } else if (strcasestr(value, "red")) {
  142. red.gpio = gpio;
  143. if ((p = strchr(value, ':')) != NULL) red.active = atoi(p + 1);
  144. }
  145. }
  146. void led_svc_init(void) {
  147. #ifdef CONFIG_LED_GREEN_GPIO_LEVEL
  148. green.active = CONFIG_LED_GREEN_GPIO_LEVEL;
  149. #endif
  150. #ifdef CONFIG_LED_RED_GPIO_LEVEL
  151. red.active = CONFIG_LED_RED_GPIO_LEVEL;
  152. #endif
  153. #ifndef CONFIG_LED_LOCKED
  154. parse_set_GPIO(set_led_gpio);
  155. #endif
  156. ESP_LOGI(TAG,"Configuring LEDs green:%d (active:%d), red:%d (active:%d)", green.gpio, green.active, red.gpio, red.active);
  157. led_config(LED_GREEN, green.gpio, green.active);
  158. led_config(LED_RED, red.gpio, red.active);
  159. }