From c445eca696ecd2ae376e8cf42fb5ffa7b2ba2690 Mon Sep 17 00:00:00 2001
From: Christopher Liebman <liebman@zod.com>
Date: Fri, 25 Dec 2020 12:42:01 -0800
Subject: [PATCH] xpt2048 add option for using only touch pressure and ignoring
 IRQ

---
 lvgl_touch/Kconfig   | 11 ++++++++---
 lvgl_touch/xpt2046.c | 12 ++++++++----
 lvgl_touch/xpt2046.h |  6 ++++++
 3 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/lvgl_touch/Kconfig b/lvgl_touch/Kconfig
index 34d2a0b..b1b5e89 100644
--- a/lvgl_touch/Kconfig
+++ b/lvgl_touch/Kconfig
@@ -99,7 +99,6 @@ menu "LVGL Touch controller"
 	    range 0 39	
             default 35 if LV_PREDEFINED_PINS_38V1
             default 19
-
             help
             Configure the touchpanel MISO pin here.
 
@@ -109,7 +108,6 @@ menu "LVGL Touch controller"
 	    range 0 39	
             default 32 if LV_PREDEFINED_PINS_38V1
             default 23
-
             help
             Configure the touchpanel MOSI pin here.
 
@@ -135,7 +133,7 @@ menu "LVGL Touch controller"
             default 27 if LV_PREDEFINED_PINS_38V4
             default 25
             help
-            Configure the touchpanel CS pin here.
+            Configure the touchpanel IRQ pin here.
     endmenu
     
     menu "Touchpanel Configuration (XPT2046)"
@@ -180,10 +178,17 @@ menu "LVGL Touch controller"
             prompt "Invert Y coordinate value."
             default y
 
+
         config LV_TOUCH_CHECK
             bool
             prompt "Check touch pressure to validate LV_TOUCH_PIN_IRQ"
             default n
+
+        config LV_TOUCH_ONLY
+            bool
+            prompt "Only use touch pressure and not IRQ to detect a touch"
+            depends on LV_TOUCH_CHECK
+            default n
     endmenu
 
     menu "Touchpanel (FT6X06) Pin Assignments"
diff --git a/lvgl_touch/xpt2046.c b/lvgl_touch/xpt2046.c
index b8a2617..5815a15 100644
--- a/lvgl_touch/xpt2046.c
+++ b/lvgl_touch/xpt2046.c
@@ -55,6 +55,9 @@ uint8_t avg_last;
  */
 void xpt2046_init(void)
 {
+    ESP_LOGI(TAG, "XPT2046 Initialization");
+
+#if XPT2046_TOUCH_ONLY == 0
     gpio_config_t irq_config = {
         .pin_bit_mask = BIT64(XPT2046_IRQ),
         .mode = GPIO_MODE_INPUT,
@@ -63,10 +66,9 @@ void xpt2046_init(void)
         .intr_type = GPIO_INTR_DISABLE,
     };
     
-    ESP_LOGI(TAG, "XPT2046 Initialization");
-
     esp_err_t ret = gpio_config(&irq_config);
     assert(ret == ESP_OK);
+#endif
 }
 
 /**
@@ -82,10 +84,11 @@ bool xpt2046_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
 
     int16_t x = last_x;
     int16_t y = last_y;
-
+#if XPT2046_TOUCH_ONLY == 0
     uint8_t irq = gpio_get_level(XPT2046_IRQ);
 
     if (irq == 0) {
+#endif
 #if XPT2046_TOUCH_CHECK != 0
         int16_t z1 = xpt2046_cmd(CMD_Z1_READ) >> 3;
         int16_t z2 = xpt2046_cmd(CMD_Z2_READ) >> 3;
@@ -119,8 +122,9 @@ bool xpt2046_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
 #if XPT2046_TOUCH_CHECK != 0
         }
 #endif
+#if XPT2046_TOUCH_ONLY == 0
     }
-
+#endif
     if (!valid)
     {
         avg_last = 0;
diff --git a/lvgl_touch/xpt2046.h b/lvgl_touch/xpt2046.h
index 592ae8d..9a4ccf3 100644
--- a/lvgl_touch/xpt2046.h
+++ b/lvgl_touch/xpt2046.h
@@ -36,6 +36,12 @@ extern "C" {
 #define XPT2046_Y_INV       CONFIG_LV_TOUCH_INVERT_Y
 #define XPT2046_XY_SWAP		CONFIG_LV_TOUCH_XY_SWAP
 #define XPT2046_TOUCH_CHECK CONFIG_LV_TOUCH_CHECK
+#if defined(CONFIG_LV_TOUCH_ONLY)
+#define XPT2046_TOUCH_ONLY  CONFIG_LV_TOUCH_ONLY
+#else
+#define XPT2046_TOUCH_ONLY  0
+#endif
+
 /**********************
  *      TYPEDEFS
  **********************/