esp32: debounced button events

diff --git a/lib/lws-plat-esp32.c b/lib/lws-plat-esp32.c
index 12d603f..cd631f8 100644 (file)
--- a/lib/lws-plat-esp32.c
+++ b/lib/lws-plat-esp32.c
@@ -640,12 +640,15 @@ static const char *gapss_str[] = {
 };
 
 static romfs_t lws_esp32_romfs;
-static TimerHandle_t leds_timer, scan_timer
+static TimerHandle_t leds_timer, scan_timer, debounce_timer
 #if !defined(CONFIG_LWS_IS_FACTORY_APPLICATION)
 , mdns_timer
 #endif
 ;
 static enum lws_gapss gapss = LWS_GAPSS_INITIAL;
+static char bdown;
+
+#define GPIO_SW 14
 
 struct esp32_file {
        const struct inode *i;
@@ -785,6 +788,29 @@ again:
        return 0;
 }
 
+void __attribute__(( weak ))
+lws_esp32_button(int down)
+{
+}
+
+void IRAM_ATTR
+gpio_irq(void *arg)
+{
+       bdown ^= 1;
+       gpio_set_intr_type(GPIO_SW, GPIO_INTR_DISABLE);
+       xTimerStart(debounce_timer, 0);
+
+       lws_esp32_button(bdown);
+}
+
+static void lws_esp32_debounce_timer_cb(TimerHandle_t th)
+{
+       if (bdown)
+               gpio_set_intr_type(GPIO_SW, GPIO_INTR_POSEDGE);
+       else
+               gpio_set_intr_type(GPIO_SW, GPIO_INTR_NEGEDGE);
+}
+
 static void lws_esp32_mdns_timer_cb(TimerHandle_t th)
 {
        uint64_t now = time_in_microseconds(); 
@@ -1353,6 +1379,7 @@ lws_esp32_wlan_nvs_get(int retry)
        return lws_esp32_force_ap;
 }
 
+
 void
 lws_esp32_wlan_config(void)
 {
@@ -1362,6 +1389,7 @@ lws_esp32_wlan_config(void)
                .speed_mode = LEDC_HIGH_SPEED_MODE,
                .timer_num = LEDC_TIMER_0
        };
+       int n;
 
        ledc_timer_config(&ledc_timer);
 
@@ -1373,6 +1401,9 @@ lws_esp32_wlan_config(void)
                           (TimerCallbackFunction_t)lws_esp32_leds_timer_cb);
         scan_timer = xTimerCreate("lws_scan", pdMS_TO_TICKS(10000), 0, NULL,
                           (TimerCallbackFunction_t)lws_esp32_scan_timer_cb);
+        debounce_timer = xTimerCreate("lws_db", pdMS_TO_TICKS(100), 0, NULL,
+                          (TimerCallbackFunction_t)lws_esp32_debounce_timer_cb);
+
 #if !defined(CONFIG_LWS_IS_FACTORY_APPLICATION)
         mdns_timer = xTimerCreate("lws_mdns", pdMS_TO_TICKS(5000), 0, NULL,
                           (TimerCallbackFunction_t)lws_esp32_mdns_timer_cb);
@@ -1380,6 +1411,25 @@ lws_esp32_wlan_config(void)
        scan_timer_exists = 1;
         xTimerStart(leds_timer, 0);
 
+       *(volatile uint32_t *)PERIPHS_IO_MUX_MTMS_U = FUNC_MTMS_GPIO14;
+
+       gpio_output_set(0, 0, 0, (1 << GPIO_SW));
+
+       n = gpio_install_isr_service(0);
+       if (!n) {
+               gpio_config_t c;
+
+               c.intr_type = GPIO_INTR_NEGEDGE;
+               c.mode = GPIO_MODE_INPUT;
+               c.pin_bit_mask = 1 << GPIO_SW;
+               c.pull_down_en = 0;
+               c.pull_up_en = 0;
+               gpio_config(&c);
+
+               if (gpio_isr_handler_add(GPIO_SW, gpio_irq, NULL))
+                       lwsl_notice("isr handler add for 14 failed\n");
+       } else
+               lwsl_notice("failed to install gpio isr service: %d\n", n);
 
        lws_esp32_wlan_nvs_get(0);
        tcpip_adapter_init();