Browse Source

print out ID1, ID2, ID3 registers

James Bowman 6 years ago
parent
commit
4721cc2397
1 changed files with 29 additions and 4 deletions
  1. 29 4
      ili9488.ino

+ 29 - 4
ili9488.ino

@@ -8,6 +8,10 @@
 #define SDA 4   // data in to ILI9488
 #define SDO 5   // data out from ILI9488
 
+#define ILI9488_CMD_READ_ID1  0xDA
+#define ILI9488_CMD_READ_ID2  0xDB
+#define ILI9488_CMD_READ_ID3  0xDC
+
 void setup()
 {
   Serial.begin(1000000); // JCB
@@ -43,20 +47,41 @@ void out_8(uint8_t b)
   digitalWrite(CSX, HIGH);
 }
 
-void loop()
+uint8_t rdreg(uint8_t reg)
 {
+  uint8_t r;
+
   digitalWrite(DCX, LOW);
-  out_8(0xda);  // RDID1
+  out_8(reg);
 
-  Serial.println();
   digitalWrite(DCX, HIGH);
   digitalWrite(CSX, LOW);
   for (int i = 0; i < 8; i++) {
     digitalWrite(SCL, LOW);
     digitalWrite(SCL, HIGH);
-    Serial.println(digitalRead(SDO), DEC);
+    r = (r << 1) | digitalRead(SDO);
   }
   digitalWrite(CSX, HIGH);
+  return r;
+}
+
+uint8_t wrreg(uint8_t reg, uint8_t val)
+{
+  digitalWrite(DCX, LOW);
+  out_8(reg);
+  digitalWrite(DCX, HIGH);
+  out_8(val);
+}
+
+void loop()
+{
+  Serial.println();
+  Serial.print("ID1: ");
+  Serial.println(rdreg(ILI9488_CMD_READ_ID1), HEX);
+  Serial.print("ID2: ");
+  Serial.println(rdreg(ILI9488_CMD_READ_ID2), HEX);
+  Serial.print("ID3: ");
+  Serial.println(rdreg(ILI9488_CMD_READ_ID3), HEX);
 
   delay(3000);
 }