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jsauermann |
/*******************************************************************************
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********************************************************************************
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** **
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** INTERRUPT HANDLING **
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** **
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********************************************************************************
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*******************************************************************************/
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unsigned char serial_in_buffer[16];
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unsigned char serial_in_get = 0;
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| 11 |
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unsigned char serial_in_put = 0;
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| 12 |
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unsigned char serial_in_length = 0;
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unsigned char serial_in_overflow = 0;
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void rx_interrupt()
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{
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char c = ASM(" IN (IN_RX_DATA), RU");
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if (serial_in_length < sizeof(serial_in_buffer))
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| 20 |
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{
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| 21 |
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serial_in_buffer[serial_in_put] = c;
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serial_in_put = ++serial_in_put & 15;
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| 23 |
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++serial_in_length;
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}
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| 25 |
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else
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{
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serial_in_overflow = 0xFF;
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}
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}
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//-----------------------------------------------------------------------------
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unsigned char serial_out_buffer[16];
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unsigned char serial_out_get = 0;
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| 34 |
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unsigned char serial_out_put = 0;
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| 35 |
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unsigned char serial_out_length = 0;
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| 37 |
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void tx_interrupt()
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{
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| 39 |
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if (serial_out_length)
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| 40 |
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{
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| 41 |
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serial_out_buffer[serial_out_get];
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ASM(" OUT R, (OUT_TX_DATA)");
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serial_out_get = ++serial_out_get & 15;
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| 44 |
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--serial_out_length;
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}
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| 46 |
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else
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{
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ASM(" MOVE #0x05, RR"); // RxInt and TimerInt
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ASM(" OUT R, (OUT_INT_MASK)");
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}
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}
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//-----------------------------------------------------------------------------
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unsigned int milliseconds = 0;
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unsigned int seconds_low = 0;
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| 57 |
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unsigned int seconds_mid = 0;
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unsigned int seconds_high = 0;
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| 59 |
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unsigned char seconds_changed = 0;
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void timer_interrupt()
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{
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ASM(" OUT R, (OUT_RESET_TIMER)");
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if (++milliseconds == 1000)
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{
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milliseconds = 0;
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seconds_changed = 0xFF;
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if (++seconds_low == 0)
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{
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| 70 |
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if (++seconds_mid == 0) ++seconds_high;
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}
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}
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}
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//-----------------------------------------------------------------------------
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void interrupt()
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{
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ASM(" MOVE RR, -(SP)");
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ASM(" MOVE LL, RR");
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ASM(" MOVE RR, -(SP)");
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| 81 |
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if (ASM(" IN (IN_STATUS), RU") & 0x10) rx_interrupt();
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if (ASM(" IN (IN_STATUS), RU") & 0x20) tx_interrupt();
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if (ASM(" IN (IN_STATUS), RU") & 0x40) timer_interrupt();
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ASM(" MOVE (SP)+, RR");
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ASM(" MOVE RR, LL");
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ASM(" MOVE (SP)+, RR");
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ASM(" RETI");
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}
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/*******************************************************************************
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********************************************************************************
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** **
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** UTILITY FUNCTIONS **
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** **
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********************************************************************************
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*******************************************************************************/
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int strlen(const char * buffer)
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{
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const char * from = buffer;
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while (*buffer) buffer++;
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return buffer - from;
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}
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/*******************************************************************************
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********************************************************************************
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** **
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** SERIAL OUTPUT **
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** **
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********************************************************************************
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*******************************************************************************/
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int putchr(char c)
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{
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while (serial_out_length == sizeof(serial_out_buffer)) /* wait */ ;
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serial_out_buffer[serial_out_put] = c;
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serial_out_put = ++serial_out_put & 15;
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| 120 |
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ASM(" DI"); ++serial_out_length; ASM(" EI");
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ASM(" MOVE #0x07, RR"); // RxInt and TxInt and TimerInt
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ASM(" OUT R, (OUT_INT_MASK)");
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1;
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}
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//-----------------------------------------------------------------------------
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void print_string(const char * buffer)
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{
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| 128 |
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while (*buffer) putchr(*buffer++);
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}
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//-----------------------------------------------------------------------------
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void print_hex(char * dest, unsigned int value, const char * hex)
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{
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if (value >= 0x1000) *dest++ = hex[(value >> 12) & 0x0F];
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if (value >= 0x100) *dest++ = hex[(value >> 8) & 0x0F];
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| 135 |
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if (value >= 0x10) *dest++ = hex[(value >> 4) & 0x0F];
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| 136 |
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*dest++ = hex[value & 0x0F];
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| 137 |
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*dest = 0;
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| 138 |
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}
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| 139 |
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//-----------------------------------------------------------------------------
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void print_unsigned(char * dest, unsigned int value)
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| 141 |
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{
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| 142 |
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if (value >= 10000) { *dest++ = '0' + value / 10000; value %= 10000; }
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| 143 |
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if (value >= 1000) { *dest++ = '0' + value / 1000; value %= 1000; }
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| 144 |
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if (value >= 100) { *dest++ = '0' + value / 100; value %= 100; }
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| 145 |
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if (value >= 10) { *dest++ = '0' + value / 10; value %= 10; }
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| 146 |
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*dest++ = '0' + value;
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| 147 |
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*dest = 0;
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| 148 |
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}
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| 149 |
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//-----------------------------------------------------------------------------
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| 150 |
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int print_item(const char * buffer, char flags, char sign, char pad,
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| 151 |
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const char * alt, int field_w, int min_w, char min_p)
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| 152 |
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{
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| 153 |
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// [fill] [sign] [alt] [pad] [buffer] [fill]
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| 154 |
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// ----------- len -----------
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| 155 |
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int filllen = 0;
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| 156 |
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int signlen = 0;
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| 157 |
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int altlen = 0;
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| 158 |
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int padlen = 0;
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| 159 |
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int buflen = strlen(buffer);
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| 160 |
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int len;
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| 161 |
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int i;
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| 162 |
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| 163 |
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if (min_w > buflen) padlen = min_w - buflen;
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| 164 |
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if (sign) signlen = 1;
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| 165 |
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if (alt && (flags & 0x01)) altlen = strlen(alt);
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| 166 |
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| 167 |
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len = signlen + altlen + padlen + buflen;
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| 168 |
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| 169 |
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if (0x02 & ~flags) // right align
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| 170 |
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{
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| 171 |
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for (i = len; i < field_w; i++) putchr(pad);
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| 172 |
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}
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| 173 |
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| 174 |
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if (sign) putchr(sign);
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| 175 |
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if (alt)
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| 176 |
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{
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| 177 |
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if (flags & 0x01) print_string(alt);
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| 178 |
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}
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| 179 |
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| 180 |
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for (i = 0; i < padlen; i++) putchr(min_p);
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| 181 |
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print_string(buffer);
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| 182 |
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| 183 |
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if (0x02 & flags) // left align
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| 184 |
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{
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| 185 |
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for (i = len; i < field_w; i++) putchr(pad);
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| 186 |
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}
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| 187 |
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| 188 |
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return len;
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| 189 |
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}
|
| 190 |
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//-----------------------------------------------------------------------------
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| 191 |
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int printf(const char * format, ...)
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| 192 |
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{
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| 193 |
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const char ** args = 1 + &format;
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| 194 |
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int len = 0;
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| 195 |
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char c;
|
| 196 |
|
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char flags;
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| 197 |
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char sign;
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| 198 |
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char pad;
|
| 199 |
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const char * alt;
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| 200 |
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int field_w;
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| 201 |
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int min_w;
|
| 202 |
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unsigned int * which_w;
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| 203 |
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char buffer[12];
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| 204 |
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| 205 |
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while (c = *format++)
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| 206 |
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{
|
| 207 |
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if (c != '%') { len +=putchr(c); continue; }
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| 208 |
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| 209 |
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flags = 0;
|
| 210 |
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sign = 0;
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| 211 |
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pad = ' ';
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| 212 |
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field_w = 0;
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| 213 |
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min_w = 0;
|
| 214 |
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which_w = &field_w;
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| 215 |
|
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for (;;)
|
| 216 |
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{
|
| 217 |
|
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switch(c = *format++)
|
| 218 |
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{
|
| 219 |
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case 'X': print_hex(buffer, (unsigned int)*args++,
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| 220 |
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"0123456789ABCDEF");
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| 221 |
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len += print_item(buffer, flags, sign, pad,
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| 222 |
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"0X", field_w, min_w, '0');
|
| 223 |
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break;
|
| 224 |
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|
| 225 |
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case 'd': if (((int)*args) < 0)
|
| 226 |
|
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{
|
| 227 |
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sign = '-';
|
| 228 |
|
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*args = (char *)(- ((int)*args));
|
| 229 |
|
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}
|
| 230 |
|
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print_unsigned(buffer, (unsigned int)*args++);
|
| 231 |
|
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len += print_item(buffer, flags, sign, pad,
|
| 232 |
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"", field_w, min_w, '0');
|
| 233 |
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break;
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| 234 |
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| 235 |
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case 's': len += print_item(*args++, flags & 0x02, 0, ' ',
|
| 236 |
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"", field_w, min_w, ' ');
|
| 237 |
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break;
|
| 238 |
|
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| 239 |
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case 'u': print_unsigned(buffer, (unsigned int)*args++);
|
| 240 |
|
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len += print_item(buffer, flags, sign, pad,
|
| 241 |
|
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"", field_w, min_w, '0');
|
| 242 |
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break;
|
| 243 |
|
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| 244 |
|
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case 'x': print_hex(buffer, (unsigned int)*args++,
|
| 245 |
|
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"0123456789abcdef");
|
| 246 |
|
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len += print_item(buffer, flags, sign, pad,
|
| 247 |
|
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"0x", field_w, min_w, '0');
|
| 248 |
|
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break;
|
| 249 |
|
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| 250 |
|
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case 'c': len += putchr((int)*args++); break;
|
| 251 |
|
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|
| 252 |
|
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case '#': flags |= 0x01; continue;
|
| 253 |
|
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case '-': flags |= 0x02; continue;
|
| 254 |
|
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case ' ': if (!sign) sign = ' '; continue;
|
| 255 |
|
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case '+': sign = '+'; continue;
|
| 256 |
|
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case '.': which_w = &min_w; continue;
|
| 257 |
|
|
|
| 258 |
|
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case '0': if (*which_w) *which_w *= 10;
|
| 259 |
|
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else pad = '0';
|
| 260 |
|
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continue;
|
| 261 |
|
|
|
| 262 |
|
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case '1': *which_w = 10 * *which_w + 1; continue;
|
| 263 |
|
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case '2': *which_w = 10 * *which_w + 2; continue;
|
| 264 |
|
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case '3': *which_w = 10 * *which_w + 3; continue;
|
| 265 |
|
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case '4': *which_w = 10 * *which_w + 4; continue;
|
| 266 |
|
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case '5': *which_w = 10 * *which_w + 5; continue;
|
| 267 |
|
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case '6': *which_w = 10 * *which_w + 6; continue;
|
| 268 |
|
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case '7': *which_w = 10 * *which_w + 7; continue;
|
| 269 |
|
|
case '8': *which_w = 10 * *which_w + 8; continue;
|
| 270 |
|
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case '9': *which_w = 10 * *which_w + 9; continue;
|
| 271 |
|
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case '*': *which_w = (int)*args++; continue;
|
| 272 |
|
|
|
| 273 |
|
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case 0: format--; // premature end of format
|
| 274 |
|
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break;
|
| 275 |
|
|
|
| 276 |
|
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default: len += putchr(c);
|
| 277 |
|
|
break;
|
| 278 |
|
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}
|
| 279 |
|
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break;
|
| 280 |
|
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}
|
| 281 |
|
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}
|
| 282 |
|
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return len;
|
| 283 |
|
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}
|
| 284 |
|
|
/*******************************************************************************
|
| 285 |
|
|
********************************************************************************
|
| 286 |
|
|
** **
|
| 287 |
|
|
** SERIAL INPUT **
|
| 288 |
|
|
** **
|
| 289 |
|
|
********************************************************************************
|
| 290 |
|
|
*******************************************************************************/
|
| 291 |
|
|
|
| 292 |
|
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int getchr()
|
| 293 |
|
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{
|
| 294 |
|
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char c;
|
| 295 |
|
|
|
| 296 |
|
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while (! serial_in_length) /* wait */ ;
|
| 297 |
|
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c = serial_in_buffer[serial_in_get];
|
| 298 |
|
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serial_in_get = ++serial_in_get & 15;
|
| 299 |
|
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ASM(" DI"); --serial_in_length; ASM(" EI");
|
| 300 |
|
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return c;
|
| 301 |
|
|
}
|
| 302 |
|
|
//-----------------------------------------------------------------------------
|
| 303 |
|
|
int peekchr()
|
| 304 |
|
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{
|
| 305 |
|
|
while (! serial_in_length) /* wait */ ;
|
| 306 |
|
|
return serial_in_buffer[serial_in_get];
|
| 307 |
|
|
}
|
| 308 |
|
|
//-----------------------------------------------------------------------------
|
| 309 |
|
|
char getnibble(char echo)
|
| 310 |
|
|
{
|
| 311 |
|
|
char c = peekchr();
|
| 312 |
|
|
int ret = -1;
|
| 313 |
|
|
|
| 314 |
|
|
if ((c >= '0') && (c <= '9')) ret = c - '0';
|
| 315 |
|
|
else if ((c >= 'A') && (c <= 'F')) ret = c - 0x37;
|
| 316 |
|
|
else if ((c >= 'a') && (c <= 'f')) ret = c - 0x57;
|
| 317 |
|
|
|
| 318 |
|
|
if (ret != -1) // valid hex char
|
| 319 |
|
|
{
|
| 320 |
|
|
getchr();
|
| 321 |
|
|
if (echo) putchr(c);
|
| 322 |
|
|
}
|
| 323 |
|
|
return ret;
|
| 324 |
|
|
}
|
| 325 |
|
|
//-----------------------------------------------------------------------------
|
| 326 |
|
|
int gethex(char echo)
|
| 327 |
|
|
{
|
| 328 |
|
|
int ret = 0;
|
| 329 |
|
|
char c;
|
| 330 |
|
|
|
| 331 |
|
|
while ((c = getnibble(echo)) != -1) ret = (ret << 4) | c;
|
| 332 |
|
|
return ret;
|
| 333 |
|
|
}
|
| 334 |
|
|
/*******************************************************************************
|
| 335 |
|
|
********************************************************************************
|
| 336 |
|
|
** **
|
| 337 |
|
|
** main and its helpers **
|
| 338 |
|
|
** **
|
| 339 |
|
|
********************************************************************************
|
| 340 |
|
|
*******************************************************************************/
|
| 341 |
|
|
|
| 342 |
|
|
void show_time()
|
| 343 |
|
|
{
|
| 344 |
|
|
unsigned int sl;
|
| 345 |
|
|
unsigned int sm;
|
| 346 |
|
|
unsigned int sh;
|
| 347 |
|
|
|
| 348 |
|
|
do {
|
| 349 |
|
|
seconds_changed = 0;
|
| 350 |
|
|
sl = seconds_low;
|
| 351 |
|
|
sm = seconds_mid;
|
| 352 |
|
|
sh = seconds_high;
|
| 353 |
|
|
} while (seconds_changed);
|
| 354 |
|
|
|
| 355 |
|
|
printf("Uptime is %4.4X%4.4X%4.4X seconds\r\n", sh, sm, sl);
|
| 356 |
|
|
}
|
| 357 |
|
|
//-----------------------------------------------------------------------------
|
| 358 |
|
|
void display_memory(unsigned char * address)
|
| 359 |
|
|
{
|
| 360 |
|
|
char c;
|
| 361 |
|
|
int row;
|
| 362 |
|
|
int col;
|
| 363 |
|
|
|
| 364 |
|
|
for (row = 0; row < 16; row++)
|
| 365 |
|
|
{
|
| 366 |
|
|
printf("%4.4X:", address);
|
| 367 |
|
|
for (col = 0; col < 16; col++) printf(" %2.2X", *address++);
|
| 368 |
|
|
address -= 16;
|
| 369 |
|
|
printf(" - ");
|
| 370 |
|
|
for (col = 0; col < 16; col++)
|
| 371 |
|
|
{
|
| 372 |
|
|
c = *address++;
|
| 373 |
|
|
if (c < ' ') putchr('.');
|
| 374 |
|
|
else if (c < 0x7F) putchr(c);
|
| 375 |
|
|
else putchr('.');
|
| 376 |
|
|
}
|
| 377 |
|
|
printf("\r\n");
|
| 378 |
|
|
}
|
| 379 |
|
|
}
|
| 380 |
|
|
//-----------------------------------------------------------------------------
|
| 381 |
|
|
int main(int argc, char * argv[])
|
| 382 |
|
|
{
|
| 383 |
|
|
char c;
|
| 384 |
|
|
char noprompt;
|
| 385 |
|
|
char last_c;
|
| 386 |
|
|
unsigned char * address;
|
| 387 |
|
|
|
| 388 |
|
|
ASM(" MOVE #0x05, RR"); // RxInterrupt enable bit
|
| 389 |
|
|
ASM(" OUT R, (OUT_INT_MASK)");
|
| 390 |
|
|
for (;;)
|
| 391 |
|
|
{
|
| 392 |
|
|
last_c = c;
|
| 393 |
|
|
if (!noprompt) printf("-> ");
|
| 394 |
|
|
noprompt = 0;
|
| 395 |
|
|
switch(c = getchr())
|
| 396 |
|
|
{
|
| 397 |
|
|
case '\r':
|
| 398 |
|
|
case '\n':
|
| 399 |
|
|
if (last_c == 'd')
|
| 400 |
|
|
{
|
| 401 |
|
|
address += 0x100;
|
| 402 |
|
|
printf("\b\b\b\b");
|
| 403 |
|
|
display_memory(address);
|
| 404 |
|
|
c = 'd';
|
| 405 |
|
|
}
|
| 406 |
|
|
noprompt = 1;
|
| 407 |
|
|
break;
|
| 408 |
|
|
|
| 409 |
|
|
case 'C':
|
| 410 |
|
|
case 'c':
|
| 411 |
|
|
show_time();
|
| 412 |
|
|
break;
|
| 413 |
|
|
|
| 414 |
|
|
case 'D':
|
| 415 |
|
|
case 'd':
|
| 416 |
|
|
last_c = 'd';
|
| 417 |
|
|
printf("Display ");
|
| 418 |
|
|
address = (unsigned char *)gethex(1);
|
| 419 |
|
|
printf("\r\n");
|
| 420 |
|
|
getchr();
|
| 421 |
|
|
display_memory(address);
|
| 422 |
|
|
break;
|
| 423 |
|
|
|
| 424 |
|
|
case 'E':
|
| 425 |
|
|
case 'e':
|
| 426 |
|
|
printf("LEDs ");
|
| 427 |
|
|
gethex(1); ASM(" OUT R, (OUT_LEDS)");
|
| 428 |
|
|
printf("\r\n");
|
| 429 |
|
|
getchr();
|
| 430 |
|
|
break;
|
| 431 |
|
|
|
| 432 |
|
|
case 'M':
|
| 433 |
|
|
case 'm':
|
| 434 |
|
|
printf("Memory ");
|
| 435 |
|
|
address = (unsigned char *)gethex(1);
|
| 436 |
|
|
printf(" Value ");
|
| 437 |
|
|
getchr();
|
| 438 |
|
|
*address = gethex(1);
|
| 439 |
|
|
getchr();
|
| 440 |
|
|
printf("\r\n");
|
| 441 |
|
|
break;
|
| 442 |
|
|
|
| 443 |
|
|
case 'S':
|
| 444 |
|
|
case 's':
|
| 445 |
|
|
printf("DIP switch is 0x%X\r\n",
|
| 446 |
|
|
ASM(" IN (IN_DIP_SWITCH), RU"));
|
| 447 |
|
|
break;
|
| 448 |
|
|
|
| 449 |
|
|
case 'T':
|
| 450 |
|
|
case 't':
|
| 451 |
|
|
printf("Temperature is %d degrees Celsius\r\n",
|
| 452 |
|
|
ASM(" IN (IN_TEMPERAT), RU"));
|
| 453 |
|
|
break;
|
| 454 |
|
|
|
| 455 |
|
|
case 'Q':
|
| 456 |
|
|
case 'q':
|
| 457 |
|
|
case 'X':
|
| 458 |
|
|
case 'x': printf("Halted.\r\n");
|
| 459 |
|
|
while (serial_out_length) /* wait */ ;
|
| 460 |
|
|
ASM(" DI");
|
| 461 |
|
|
ASM(" HALT");
|
| 462 |
|
|
break;
|
| 463 |
|
|
|
| 464 |
|
|
default:
|
| 465 |
|
|
printf("\r\n"
|
| 466 |
|
|
"C - show time\r\n"
|
| 467 |
|
|
"D - display memory\r\n"
|
| 468 |
|
|
"E - set LEDs\r\n"
|
| 469 |
|
|
"M - modify memory\r\n"
|
| 470 |
|
|
"S - read DIP switch\r\n"
|
| 471 |
|
|
"T - read temperature\r\n"
|
| 472 |
|
|
"Q - quit\r\n"
|
| 473 |
|
|
"X - exit\r\n"
|
| 474 |
|
|
"\r\n");
|
| 475 |
|
|
}
|
| 476 |
|
|
}
|
| 477 |
|
|
}
|
| 478 |
|
|
//-----------------------------------------------------------------------------
|
