From 8ad1ede59f9e55fbe91caef9fe2ecec8eca2fff3 Mon Sep 17 00:00:00 2001
From: ladyada <limor@ladyada.net>
Date: Thu, 22 Feb 2018 17:03:41 -0500
Subject: [PATCH] change init to retry ILI9341 checks a few times

---
 Adafruit_TFTLCD.cpp | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/Adafruit_TFTLCD.cpp b/Adafruit_TFTLCD.cpp
index 69f6a83..ee7693f 100644
--- a/Adafruit_TFTLCD.cpp
+++ b/Adafruit_TFTLCD.cpp
@@ -872,6 +872,15 @@ uint16_t Adafruit_TFTLCD::readPixel(int16_t x, int16_t y) {
 
 // Ditto with the read/write port directions, as above.
 uint16_t Adafruit_TFTLCD::readID(void) {
+  uint16_t id;
+
+  // retry a bunch!
+  for (int i = 0; i<5; i++) {
+    id = readReg(0xD3);
+    if (id == 0x9341) {
+      return id;
+    }
+  }
 
   uint8_t hi, lo;
 
@@ -899,11 +908,6 @@ uint16_t Adafruit_TFTLCD::readID(void) {
     }
   }
 
-  uint16_t id = readReg(0xD3);
-  if (id == 0x9341) {
-    return id;
-  }
-
   CS_ACTIVE;
   CD_COMMAND;
   write8(0x00);