import edu.berkeley.cs.obits.*;
-public interface AtmelDevice extends Device {
+public abstract class AtmelDevice extends Device {
+
+ /** issue a command to the device in Mode4 format; see Gosset's documentation for further details */
public void mode4(int z, int y, int x, int d) throws DeviceException;
+
+ public Sector sector(int col, int row) { return new Sector(col, row); }
+ public final class Sector {
+ public final int col;
+ public final int row;
+ public Sector(int col, int row) {
+ if (row % 4 != 0) throw new Error("Sector must be created with a multiple-of-4 row");
+ if (col % 4 != 0) throw new Error("Sector must be created with a multiple-of-4 col");
+ this.row = row;
+ this.col = col;
+ }
+ }
+
+ public Cell cell(int col, int row) { return new Cell(col, row); }
+ public final class Cell {
+ public final int col;
+ public final int row;
+ public Sector getSector() { return sector(col - (col % 4), row - (row % 4)); }
+ public Cell(int col, int row) {
+ this.row = row;
+ this.col = col;
+ }
+ }
+
}
--- /dev/null
+//\r
+// YOU MUST COMPILE THIS WITH -O3 OR THE AVR WILL NOT BE ABLE TO KEEP UP!!!!\r
+//\r
+\r
+#define F_CPU 3960000\r
+#include <avr/wdt.h>\r
+#include <avr/delay.h>\r
+#include <avr/io.h>\r
+#include <avr/signal.h>\r
+#include <avr/interrupt.h>\r
+\r
+unsigned char val = 0;\r
+\r
+volatile unsigned char dataReady = 0;\r
+volatile unsigned char data = 0;\r
+\r
+void initUART1(unsigned int baudRate, unsigned int doubleRate) {\r
+ UBRRHI = (((baudRate) >> 8) & 0x000F); \r
+ UBRR1 = ((baudRate) & 0x00FF); \r
+ UCSR1B |= ((1 << RXEN1) | (1 << TXEN1) | (1 << RXCIE1)); \r
+ /*\r
+ if (doubleRate)\r
+ UCSR1A |= (1 << U2X1);\r
+ else\r
+ UCSR1A &= ~(1 << U2X1);\r
+ */\r
+}\r
+\r
+#define BUFSIZE (1024 *2)\r
+static char buf[BUFSIZE];\r
+volatile static int head = 0;\r
+volatile static int tail = 0;\r
+\r
+void send(char c) {\r
+ while(!(UCSR1A & (1 << UDRE1))); /* Wait for data Regiester to be empty */\r
+ UDR1 = (int)c;\r
+}\r
+\r
+inline void portd(int bit, int on) {\r
+ if (on) {\r
+ PORTD &= ~(1<<bit);\r
+ } else {\r
+ PORTD |= (1<<bit);\r
+ }\r
+}\r
+inline void cts(int c) {\r
+ if (c) {\r
+ PORTE &= ~(1 << 4);\r
+ portd(0, 1);\r
+ } else {\r
+ PORTE |= (1 << 4);\r
+ portd(0, 0);\r
+ }\r
+}\r
+\r
+inline int inc(int x) { x++; if (x>=BUFSIZE) x=0; return x; }\r
+inline int full() { return inc(tail)==head; }\r
+inline int nearlyFull() {\r
+ if (tail==head) return 0;\r
+ if (tail < head) return (head-tail) < (BUFSIZE/2);\r
+ return (tail-head) > (BUFSIZE/2);\r
+}\r
+inline int empty() { return head==tail; }\r
+\r
+inline char recv() {\r
+ int q;\r
+ char ret;\r
+ while(empty()) cts(1);\r
+ ret = buf[head];\r
+ head = inc(head);\r
+ if (!nearlyFull()) cts(0);\r
+ return ret;\r
+}\r
+\r
+void init() {\r
+ EIMF = 0xFF; /* Enalbe External Interrrupt*/ \r
+ DDRD = 0xFF; /* Configure PORTD as Output */\r
+ DDRE = 1 << 4; /* ability to write to E */\r
+ initUART1(1, 0);\r
+ SREG |= 0x80;\r
+ sei();\r
+}\r
+\r
+void conf(int z, int y, int x, int d) {\r
+ FPGAX = x;\r
+ FPGAY = y;\r
+ FPGAZ = z;\r
+ FPGAD = d;\r
+}\r
+\r
+void doreset() {\r
+ int i;\r
+ for(i=0; i<5; i++) {\r
+ PORTD = ~0x01;\r
+ _delay_ms(50);\r
+ PORTD = ~0x02;\r
+ _delay_ms(50);\r
+ PORTD = ~0x04;\r
+ _delay_ms(50);\r
+ PORTD = ~0x08;\r
+ _delay_ms(50);\r
+ }\r
+ PORTD = ~0x00;\r
+ wdt_enable(WDTO_250MS);\r
+ while(1) { }\r
+}\r
+\r
+SIGNAL(SIG_INTERRUPT1) {\r
+ doreset();\r
+}\r
+\r
+void die() { cli(); cts(0); _delay_ms(2000); while(1) { } }\r
+SIGNAL(SIG_UART1_RECV) {\r
+ if (UCSR1A & (1 << FE1)) { portd(2,0); portd(3,1); die(); } // framing error, lock up with LED=01\r
+ if ((UCSR1A & (1 << OR1))) { portd(2,1); portd(3,0); die(); } // overflow; lock up with LED=10\r
+ if (full()) { portd(2,1); portd(3,1); die(); } // buffer overrun\r
+ buf[tail] = UDR1;\r
+ tail = inc(tail);\r
+ SREG |= 0x80;\r
+ sei();\r
+ if (nearlyFull()) cts(0);\r
+}\r
+\r
+inline int hex(char c) {\r
+ if (c >= '0' && c <= '9') return (c - '0');\r
+ if (c >= 'a' && c <= 'f') return ((c - 'a') + 0xa);\r
+ if (c >= 'A' && c <= 'F') return ((c - 'A') + 0xa);\r
+ return -1;\r
+}\r
+\r
+int main() {\r
+ int count;\r
+ init();\r
+ cts(0);\r
+ send('O');\r
+ send('B');\r
+ send('I');\r
+ send('T');\r
+ send('S');\r
+ send('\n');\r
+ cts(1);\r
+ for(;;) {\r
+ int i, x=0, y=0, z=0, d=0;\r
+ switch(recv()) {\r
+ case 1:\r
+ z = recv();\r
+ y = recv();\r
+ x = recv();\r
+ d = recv();\r
+ portd(1,1);\r
+ conf(z, y, x, d);\r
+ portd(1,0);\r
+ break;\r
+ default: die();\r
+ }\r
+ }\r
+ return 0;\r
+} \r
+\r