+package com.atmel.fpslic;
+
+import com.ftdi.usb.*;
+import java.io.*;
+
+/**
+ * Bitstream level access to the bootstrap interface (protocol wrapper around FpslicPins)
+ */
+public class FpslicBoot {
+
+ private FpslicBootPins pins;
+
+ public FpslicBoot(FpslicBootPins pins) throws IOException {
+ this.pins = pins;
+ reset();
+ }
+
+ public void reset() throws IOException {
+
+ pins.avrrstPin(false);
+ pins.configDataPin(false);
+ pins.resetPin(false);
+ pins.cclkPin(false);
+
+ pins.conPin(false);
+ pins.flush();
+
+ pins.resetPin(false);
+ try { Thread.sleep(500); } catch (Exception e) { }
+ if (pins.initPin()) throw new RuntimeException("INIT was still high after pulling RESET low");
+
+ pins.resetPin(true);
+ try { Thread.sleep(500); } catch (Exception e) { }
+ if (!pins.initPin()) throw new RuntimeException("INIT was still low after releasing RESET");
+
+ sendConfigBits(0,2);
+ pins.flush();
+ }
+
+ public OutputStream getConfigStream() throws IOException {
+ reset();
+ return new OutputStream() {
+ int bytes = 0;
+ int bits = 0;
+ public void write(int in) throws IOException {
+ for(int i=7; i>=0; i--) {
+ bits++;
+ sendConfigBits((((in & 0xff) & (1<<i))!=0)?1:0, 1);
+ }
+ }
+ public void write(byte[] b, int off, int len) throws IOException {
+ for(int i=off; i<off+len; i++)
+ write(b[i]);
+ }
+ public void flush() throws IOException {
+ pins.flush();
+ }
+ public void close() throws IOException {
+
+ pins.flush();
+
+ // turn off the CON pin we've been pulling low...
+ pins.releaseConPin();
+
+ if (!pins.initPin())
+ throw new RuntimeException("initialization failed at " + bytes);
+ for(int i=0; i<100; i++) {
+ pins.flush();
+ if (!pins.initPin())
+ throw new RuntimeException("initialization failed at " + bytes);
+ try { Thread.sleep(20); } catch (Exception e) { }
+ sendConfigBits(0,1);
+ }
+
+ pins.close();
+ }
+ };
+ }
+
+ public OutputStream getOutputStream() throws IOException { return pins.getUartOutputStream(); }
+ public InputStream getInputStream() throws IOException { return pins.getUartInputStream(); }
+
+ public void selfTest() throws Exception {
+ boolean pin;
+ System.out.print("smoke check: ");
+
+ // correct preamble
+ getConfigStream();
+ sendConfigBits(Integer.parseInt("00000000", 2), 8);
+ sendConfigBits(Integer.parseInt("10110111", 2), 8);
+ sendConfigBits(0,1);
+ pins.flush();
+ try { Thread.sleep(100); } catch (Exception e) { }
+ pin = pins.initPin();
+ System.out.print((pin ? green(" [pass]") : red(" [FAIL]")));
+
+ // preamble shifted one bit earlier than it should be
+ getConfigStream();
+ sendConfigBits(Integer.parseInt("0000000", 2), 7);
+ sendConfigBits(Integer.parseInt("10110111", 2), 8);
+ sendConfigBits(0, 2);
+ pins.flush();
+ try { Thread.sleep(100); } catch (Exception e) { }
+ pin = pins.initPin();
+ System.out.print((pin ? red(" [FAIL]") : green(" [pass]")));
+
+ // preamble shifted one bit later than it should be
+ getConfigStream();
+ sendConfigBits(Integer.parseInt("000000000", 2), 9);
+ sendConfigBits(Integer.parseInt("10110111", 2), 8);
+ //sendConfigBits(0, 1);
+ pins.flush();
+ try { Thread.sleep(100); } catch (Exception e) { }
+ pin = pins.initPin();
+ System.out.print((pin ? red(" [FAIL]") : green(" [pass]")));
+
+ // plain 'ol bogus preamble
+ getConfigStream();
+ sendConfigBits(Integer.parseInt("00000000", 2), 8);
+ sendConfigBits(Integer.parseInt("11110111", 2), 8);
+ sendConfigBits(0, 1);
+ pins.flush();
+ try { Thread.sleep(100); } catch (Exception e) { }
+ pin = pins.initPin();
+ System.out.print((pin ? red(" [FAIL]") : green(" [pass]")));
+
+ System.out.println();
+ }
+
+ // Private //////////////////////////////////////////////////////////////////////////////
+
+ private void sendConfigBits(int dat, int numbits) throws IOException {
+ for(int i=(numbits-1); i>=0; i--) {
+ boolean bit = (dat & (1<<i)) != 0;
+ pins.configDataPin(bit);
+ pins.cclkPin(true);
+ pins.cclkPin(false);
+ //dbits &= ~(1<<6); // let the clock fall with the next data bit, whenever it goes out
+ }
+ }
+
+ private static String red(Object o) { return "\033[31m"+o+"\033[0m"; }
+ private static String green(Object o) { return "\033[32m"+o+"\033[0m"; }
+
+}