f411_vr.lst

用c8051f410和FLASH（SPI接口）实现的数字录音机。

 137          // System and peripheral initialization functions
 138          void System_Init (void);
 139          void VDDMon_Init (void);
 140          void Port_Init (void);
 141          void ADC0_Init (void);
 142          void DAC0_Init (void);
 143          void PCA_Init (void);
 144          void SPI0_Init (void);
 145          void RTC_Init (void);
 146          void Timer0_Init (int period);
 147          void Timer1_Init (int period);
 148          void Timer2_Init (int period);
 149          void Timer3_Init (int period);
 150          void Recording_Search (void);
 151          
 152          // Interrupt service routines
 153          void Timer0_ISR (void);                // LED updates
 154          void Timer1_ISR (void);                // Switch polling
 155          void ADC0_ISR (void);                  // Recording
 156          void Timer3_ISR (void);                // Playback
 157          
 158          //-----------------------------------------------------------------------------
 159          // MAIN Routine
 160          //-----------------------------------------------------------------------------
 161          void main (void)
 162          {
 163   1         unsigned char i;
 164   1      
 165   1         // Watchdog timer disabled in VR_STARTUP.A51
 166   1      
 167   1         System_Init ();                     // Initialize system clock
 168   1         Port_Init ();                       // Initialize crossbar and GPIO
 169   1         ADC0_Init ();                       // Initialize ADC0 (microphone)
 170   1         DAC0_Init ();                       // Initialize DAC0 (speaker)
 171   1         PCA_Init ();                        // Initialize the PCA for 8-bit PWM
 172   1                                             // in modules 0, 1, and 2
 173   1         SPI0_Init();                        // Initialize the interface to the flash
 174   1      
 175   1         RTC_Init ();                        // Stop the RTC from causing a wake-up
 176   1                                             // from suspend
 177   1      
 178   1         Timer0_Init (LED_PWM);              // Initialize timer 0 to provide a
 179   1                                             // 76 Hz interrupt rate for the LEDs
C51 COMPILER V7.06   F411_VR                                                               02/18/2009 16:30:48 PAGE 4   

 180   1      
 181   1         Timer1_Init (POLLING);              // Initialize timer 1 to provide a
 182   1                                             // 64 Hz interrupt rate for the switches
 183   1      
 184   1         Timer2_Init (SAMP_FREQ);            // Initialize the timer to provide an
 185   1                                             // 8KHz interrupt rate for sampling
 186   1      
 187   1         Timer3_Init (SAMP_FREQ);            // Initialize the timer to provide an
 188   1                                             // 8KHz interrupt rate for sampling
 189   1      
 190   1         EA = 1;                             // enable global interrupts
 191   1      
 192   1         SSTFlash_Init ();                   // disable the write protection in the
 193   1                                             // external SST flash memory
 194   1         Recording_Search ();                // search for a recording already
 195   1                                             // present in memory
 196   1      
 197   1         TR1 = 1;                            // start polling the switches
 198   1      
 199   1         // loop forever
 200   1         while (1)
 201   1         {
 202   2            if (ENTER_SUSPEND == 1)          // check if no interaction has occurred
 203   2            {                                // for some time
 204   3               // disable everything to save the most power and set everything to a
 205   3               // dormant state
 206   3               ENTER_SUSPEND = 0;
 207   3      
 208   3               TR1 = 0;                      // stop polling the switches
 209   3      
 210   3               EA = 0;                       // disable all interrupts
 211   3      
 212   3               XBR1 = 0x40;                  // disable the PCA
 213   3               XBR0 = 0x00;                  // disable the SPI
 214   3      
 215   3               SCK = 0;                      // drive the SPI pins low so the
 216   3               MISO = 0;                     // external Flash won't attempt to draw
 217   3               MOSI = 0;                     // current while unpowered
 218   3      
 219   3               IDA0CN &= ~0x80;              // disable DAC0
 220   3               REF0CN &= ~0x01;              // disable VREF
 221   3      
 222   3               LED0 = 1;                     // turn the LEDs off
 223   3               LED1 = 1;
 224   3      
 225   3               TRANS = 1;                    // turn off the external circuitry
 226   3      
 227   3               RSTSRC = 0x00;                // disable missing clock detector
 228   3               VDM0CN &= ~0x80;              // disable the VDD Monitor
 229   3      
 230   3               OSCICN |= 0x20;               // enter suspend mode and wait
 231   3                                             // until a port match event occurs
 232   3      
 233   3               // re-enable and reinitialize the system
 234   3               VDDMon_Init ();
 235   3      
 236   3               TRANS = 0;                    // turn on the external circuitry
 237   3      
 238   3               REF0CN |= 0x01;               // re-enable VREF
 239   3               IDA0CN |= 0x80;               // re-enable DAC0
 240   3      
 241   3               XBR0 = 0x02;                  // re-enable SPI
C51 COMPILER V7.06   F411_VR                                                               02/18/2009 16:30:48 PAGE 5   

 242   3               XBR1 = 0x42;                  // re-enable PCA0_0 and PCA0_1
 243   3      
 244   3               // wait 10us until the Flash is ready to receive writes and reads
 245   3               for (i = 0; i < 64; i++);
 246   3      
 247   3               SSTFlash_Init ();             // re-initialize the SST flash
 248   3      
 249   3               EA = 1;                       // enable global interrupts
 250   3      
 251   3               // wait until the button that woke the system is released
 252   3               while ((REC_PLAY == 0) || (ERASE == 0));
 253   3      
 254   3               TR1 = 1;                      // begin polling the buttons again
 255   3            }
 256   2         }
 257   1      }
 258          
 259          /////////////////////////// INITIALIZATION ROUTINES ///////////////////////////
 260          
 261          //-----------------------------------------------------------------------------
 262          // System_Init
 263          //-----------------------------------------------------------------------------
 264          //
 265          // Return Value : None
 266          // Parameters   : None
 267          //
 268          // This routine initializes the system clock to use the internal 24.5MHz / 4
 269          // oscillator as its clock source and enables the missing clock detector reset.
 270          // Additionally, this routine sets up VREF, the internal regulator, and the
 271          // VDD monitor.
 272          //
 273          void System_Init (void)
 274          {
 275   1         OSCICN = 0x85;                      // configure internal oscillator打开内部24.5M振荡器并实行4分频
 276   1         RSTSRC = 0x04;                      // enable missing clock detector.如果丢掉时钟将引起复位
 277   1      
 278   1         REF0CN = 0x01;                      // set up and enable VREF pin 输出参考电压参考电压为1.5V
 279   1      
 280   1         REG0CN = 0x10;                      // set up and enable 2.5V VDD from the 开启内部VDD电压产生电路并设