import com.ftdi.usb.*;
import java.io.*;
-public class FpslicRawUsb extends FtdiUart implements FpslicRaw {
-
- private int dmask =
- (1<<0) |
- (1<<1) |
- (1<<2) |
- //(1<<3) |
- //(1<<4) |
- (1<<5) |
- (1<<6) |
- (1<<7);
-
- public FpslicRawUsb() throws IOException {
- super(0x6666, 0x3133, 1500 * 1000);
- reset();
- }
+/**
+ * Exposes the FpslicRaw interface of an FPSLIC wired to an FTDI USB-UART.
+ */
+public class FpslicRawUsb implements FpslicRaw {
- void flush() throws IOException { getOutputStream().flush(); }
+ private FpslicPins pins;
- protected int dbits = 0;
- protected synchronized void dbang(int bit, boolean val) throws IOException {
- dbits = val ? (dbits | (1 << bit)) : (dbits & (~(1 << bit)));
- try {
- getOutputStream().write((byte)dbits);
- } catch (IOException e) { throw new RuntimeException(e); }
+ public FpslicRawUsb(FtdiUart ftdiuart) throws IOException {
+ this.pins = new FpslicPinsUsb(ftdiuart);
+ reset();
}
public void reset() throws IOException {
- dmask =
- (1<<0) |
- (1<<1) |
- (1<<2) |
- //(1<<3) |
- //(1<<4) |
- (1<<5) |
- (1<<6) |
- (1<<7);
- avrrst(false);
-
- flush();
- //purge();
-
- dbus_mode(dmask);
- flush();
-
- clk(false);
- data(false);
- con(false);
- flush();
- //try { Thread.sleep(500); } catch (Exception e) { }
-
- reset(false);
- flush();
- try { Thread.sleep(500); } catch (Exception e) { }
- if (initErr()) throw new RuntimeException("INIT was still high after pulling RESET low");
+ pins.avrrstPin(false);
+ pins.configDataPin(false);
+ pins.resetPin(false);
+ pins.cclkPin(false);
+
+ pins.conPin(false);
+ pins.flush();
- reset(true);
- flush();
+ pins.resetPin(false);
try { Thread.sleep(500); } catch (Exception e) { }
- if (!initErr()) throw new RuntimeException("INIT was still low after releasing RESET");
+ if (pins.initPin()) throw new RuntimeException("INIT was still high after pulling RESET low");
- con(false);
- }
-
- void config(boolean bit) throws IOException { config(bit?1:0, 1); }
- void config(int dat) throws IOException { config(dat, 8); }
- void config(int dat, int numbits) throws IOException {
- for(int i=(numbits-1); i>=0; i--) {
- boolean bit = (dat & (1<<i)) != 0;
- data(bit);
- clk(true);
- clk(false);
- }
- }
-
- // tricky: RESET has a weak pull-up, and is wired to a CBUS line. So,
- // we can pull it down (assert reset) from uart-mode, or we can
- // let it float upward from either mode.
- void reset(boolean on) throws IOException {
- uart_and_cbus_mode(1<<1, on ? (1<<1) : 0);
- flush();
- if (on) {
- dbus_mode(dmask);
- flush();
- }
- }
-
- void avrrst(boolean on) throws IOException { dbang(7, on); }
- void clk(boolean on) throws IOException { dbang(6, on); }
- void data(boolean on) throws IOException { dbang(5, on); }
-
- boolean initErr() throws IOException { flush(); return (readPins() & (1<<4))!=0; }
+ pins.resetPin(true);
+ try { Thread.sleep(500); } catch (Exception e) { }
+ if (!pins.initPin()) throw new RuntimeException("INIT was still low after releasing RESET");
- boolean con() throws IOException {
- flush();
- //dmask &= ~(1<<0);
- dbus_mode(dmask);
- return (readPins() & (1<<0)) != 0;
- }
- boolean rcon() throws IOException {
- flush();
- dmask &= ~(1<<0);
- dbus_mode(dmask);
- return (readPins() & (1<<0)) != 0;
- }
- void con(boolean on) throws IOException {
- flush();
- dmask |= (1<<0);
- dbang(0, on);
- dbus_mode(dmask);
+ sendConfigBits(0,2);
+ pins.flush();
}
public OutputStream getConfigStream() throws IOException {
reset();
- config(0,10);
- con();
return new OutputStream() {
int bytes = 0;
+ int bits = 0;
public void write(int in) throws IOException {
- bytes++;
for(int i=7; i>=0; i--) {
- config((((in & 0xff) & (1<<i))!=0)?1:0, 1);
+ bits++;
+ sendConfigBits((((in & 0xff) & (1<<i))!=0)?1:0, 1);
}
}
public void write(byte[] b, int off, int len) throws IOException {
write(b[i]);
}
public void flush() throws IOException {
- FpslicRawUsb.this.flush();
- rcon();
+ pins.flush();
}
public void close() throws IOException {
- flush();
- if (!initErr())
+
+ 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++) {
- flush();
- if (!initErr())
+ pins.flush();
+ if (!pins.initPin())
throw new RuntimeException("initialization failed at " + bytes);
try { Thread.sleep(20); } catch (Exception e) { }
- config(0,1);
+ sendConfigBits(0,1);
}
- avrrst(false);
- try { Thread.sleep(100); } catch (Exception e) { }
- purge();
- uart_and_cbus_mode(1<<1, 1<<1);
+
+ pins.close();
}
};
}
- static String red(Object o) { return "\033[31m"+o+"\033[0m"; }
- static String green(Object o) { return "\033[32m"+o+"\033[0m"; }
+ public OutputStream getOutputStream() throws IOException { return pins.getUartOutputStream(); }
+ public InputStream getInputStream() throws IOException { return pins.getUartInputStream(); }
+
public void selfTest() throws Exception {
- FpslicRawUsb d = this;
boolean pin;
- d.reset();
- d.config(0,3);
- d.con();
- d.config(0,7);
- d.flush();
- //d.flush();
- d.config(Integer.parseInt("10110111", 2), 8);
- d.config(0,1);
- d.flush();
- try { Thread.sleep(100); } catch (Exception e) { }
- pin = d.initErr();
- System.out.println("good preamble => " + pin + " " + (pin ? green("good") : red("BAD")));
-
- d.reset();
+ 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) { }
- d.config(0,3);
- d.con();
- d.config(0,6);
- d.flush();
- //d.flush();
- d.config(Integer.parseInt("10110111", 2), 8);
- d.config(0, 2);
- d.flush();
+ 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 = d.initErr();
- System.out.println("bad preamble #2 => " + pin + " " + (pin ? red("BAD") : green("good")));
-
- d.reset();
+ 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) { }
- d.config(0,3);
- d.con();
- d.config(0,7);
- d.flush();
- //d.flush();
- d.config(Integer.parseInt("11110111", 2), 8);
- d.config(0, 1);
- d.flush();
+ 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 = d.initErr();
- System.out.println("bad preamble #1 => " + pin + " " + (pin ? red("BAD") : green("good")));
+ 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"; }
}
projects / slipway.git / blobdiff