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Tiny bringup sketch for people with DIY hardware

James Bowman 6 years ago
parent
commit
abf344f622
1 changed files with 41 additions and 0 deletions
  1. 41 0
      bringup0.ino

+ 41 - 0
bringup0.ino

@@ -0,0 +1,41 @@
+#include <SPI.h>
+
+int CS = 8;
+
+static void hostcmd(byte a)
+{
+  digitalWrite(CS, LOW);
+  SPI.transfer(a);
+  SPI.transfer(0x00);
+  SPI.transfer(0x00);
+  digitalWrite(CS, HIGH);
+  delay(200);
+}
+
+void setup()
+{
+  Serial.begin(115200);
+  pinMode(CS, OUTPUT);
+  digitalWrite(CS, HIGH);
+  SPI.begin();
+  SPI.setClockDivider(SPI_CLOCK_DIV128);
+
+  Serial.println("SPI INIT DONE");
+
+  hostcmd(0x00);  // wake up
+  hostcmd(0x68);  // reset GPU
+}
+
+void loop()
+{
+  digitalWrite(CS, LOW);
+  Serial.println();
+  Serial.println(SPI.transfer(0x10), HEX);
+  Serial.println(SPI.transfer(0x24), HEX);
+  Serial.println(SPI.transfer(0x00), HEX);
+  Serial.println(SPI.transfer(0xff), HEX);
+  Serial.println(SPI.transfer(0xff), HEX);
+  Serial.println(SPI.transfer(0xff), HEX);
+  digitalWrite(CS, HIGH);
+  delay(1000);
+}