Microwire sketch for Digispark

microwire.ino

#include <DigiCDC.h>
#include <MicrowireEEPROM.h>

/*
 * +-----+---------+
 * | Pin | Func    |
 * +-----+---------+
 * | P0  | DO/DI   |
 * +-----+---------+
 * | P1  | CLK/LED |
 * +-----+---------+
 * | P2  | CS      |
 * +-----+---------+
 * | P3  | USB     |
 * +-----+---------+
 * | P4  | USB     |
 * +-----+---------+
 * | P5  | NRST    |
 * +-----+---------+
 */
int CS=2; int CLK=1; int DI=0; int DO=0;

/*
 * 2 bytes at a time, 8-bit address (93C56!) and 5 kHz
 */
int PGS=16; int ADW=8; int SPD=200;

MicrowireEEPROM *ME;

void setup() {
  pinMode(1, OUTPUT);
  pinMode(5, OUTPUT);
  digitalWrite(1, HIGH);
  digitalWrite(5, HIGH);
  delay(1000);
  digitalWrite(1, LOW);
  digitalWrite(5, LOW);

  ME = new MicrowireEEPROM(CS, CLK, DI, DO, PGS, ADW, SPD);

  /* init virtual serial console on USB */
  SerialUSB.begin();
  SerialUSB.delay(500);

  SerialUSB.print(F("Hello, World!\r\n"));
}

void loop() {
  static int once = false;
  /* send any key to continue */
  if (!once && SerialUSB.available() > 0) {
    once = true;
    int addr=0x31;
    char hexword[5];
    // 2048b = 256B = 128 words
    for (addr = 0; addr < 128; addr++) {
#if 0
      ME->writeEnable();
      ME->write(addr, 0x1337);
      SerialUSB.delay(10);
#endif // 0
      unsigned int r = ME->read(addr);
      r &= 0xffff;
      SerialUSB.print(r, HEX);
      if (addr % 8 == 7) {
        SerialUSB.println();
      }
    }
  } else {
    SerialUSB.delay(10);
  }
}