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Memory Locations: (uppercase ascii value) A = (*$C1<<8) + *$41 Z = (*$DA<<8) + *$5A Twenty six general purpose variables available. Each is a signed 16 bit value which can represent any number between 32767 to -32786. A variable may also be used as an 8.8 fixed point value. ;Adding some NumbersThe upper eight bits can be accessed as an unsigned 8 bit value by appending h to the end of any variable. ;Using the 'h' modifier
Analog to Digital Converter 0 Value This variable contains the 10 bit output of the internal ADC converter. The ADC convertor runs in the background whenever CONFIGURATOR bit 2 is set. (SETCON 2) The 10 bit value may be either right or left justified depending on the state ADCON1 bit 7. (SET ADCON1 7) See the __HARDWARE__ Chapter for information on which pin is for input. ;Print ADC0Warning: PicPuter does not use any semaphores, read after pause statement.
Analog to Digital Converter 1 Value This variable contains the 10 bit output of the internal ADC converter. The ADC convertor runs in the background whenever CONFIGURATOR bit 2 is set. (SETCON 2) The 10 bit value may be either right or left justified depending on the state ADCON1 bit 7. (SET ADCON1 7) See the __HARDWARE__ Chapter for information on which pin is for input. ;Print ADC1Warning: PicPuter does not use any semaphores, read after pause statement.
Analog to Digital Converter 2 Value This variable contains the 10 bit output of the internal ADC converter. The ADC convertor runs in the background whenever CONFIGURATOR bit 2 is set. (SETCON 2) The 10 bit value may be either right or left justified depending on the state ADCON1 bit 7. (SET ADCON1 7) See the __HARDWARE__ Chapter for information on which pin is for input. ;Print ADC2Warning: PicPuter does not use any semaphores, read after pause statement.
Analog to Digital Converter 3 Value This variable contains the 10 bit output of the internal ADC converter. The ADC convertor runs in the background whenever CONFIGURATOR bit 2 is set. (SETCON 2) The 10 bit value may be either right or left justified depending on the state ADCON1 bit 7. (SET ADCON1 7) See the __HARDWARE__ Chapter for information on which pin is for input. ;Print ADC3Warning: PicPuter does not use any semaphores, read after pause statement.
Analog to Digital Converter 4 Value This variable contains the 10 bit output of the internal ADC converter. The ADC convertor runs in the background whenever CONFIGURATOR bit 2 is set. (SETCON 2) The 10 bit value may be either right or left justified depending on the state ADCON1 bit 7. (SET ADCON1 7) See the __HARDWARE__ Chapter for information on which pin is for input. ;Print ADC4Warning: PicPuter does not use any semaphores, read after pause statement.
Speed for Stepper Motor A This 8 bit unsigned variable contains the speed for stepper motor A. Since PicPuter switches so fast, you may find that you need to put a pretty large value to get the motor to work. The speed that the motor will pulse by default will be equal to 1uS per pulse is ASPEED=1. If ASPEED = 0 then the delay is 256 uS by default. ;Move in a circleThe signals to drive the stepper are at PORTD.0 and PORTD.1. The stepper motor output only appears if CONFIGURATOR bit 2 is set. (SETCON 2) See the stepper motor Chapter for additional information and the __HARDWARE__ Chapter for information on which pin is used for output.
Step Control for Speed for Stepper Motor A This 8 bit signed variable contains the step for stepper motor A. To move a motor 100 steps forward use a statement like 'ASTEP = 100'. This variable will slowly return to zero as the motor steps. To step in the reverse direction use a statement like 'ASTEP = -100'. Once the value reaches zero, the motor stops. If you want the motor to run continuously, you need to update the variable before it reaches zero. Since the variable is only 8 bits, only values between 127 to -128 are valid. ;Move in a circleThe signals to drive the stepper are at PORTD.0 and PORTD.1. The stepper motor output only appears if CONFIGURATOR bit 2 is set. (SETCON 2) See the stepper motor Chapter for additional information and the __HARDWARE__ Chapter for information on which pin is used for output.
Speed for Stepper Motor A This 8 bit unsigned variable contains the speed for stepper motor B. Since PicPuter switches so fast, you may find that you need to put a pretty large value to get the motor to work. The speed that the motor will pulse by default will be equal to 1uS per pulse is BSPEED=1. If BSPEED = 0 then the delay is 256 uS. ;Move in a circleThe signals to drive the stepper are at PORTD.2 and PORTD.3. The stepper motor output only appears if CONFIGURATOR bit 2 is set. (SETCON 2) See the stepper motor Chapter for additional information and the __HARDWARE__ Chapter for information on which pin is used for output.
Step Control for Speed for Stepper Motor B This 8 bit signed variable contains the step for stepper motor B. To move a motor 100 steps forward use a statement like 'BSTEP = 100'. This variable will slowly return to zero as the motor steps. To step in the reverse direction use a statement like 'BSTEP = -100'. Once the value reaches zero, the motor stops. If you want the motor to run continuously, you need to update the variable before it reaches zero. Since the variable is only 8 bits, only values between 127 to -128 are valid. ;Move in a circleThe signals to drive the stepper are at PORTD.0 and PORTD.1. The stepper motor output only appears if CONFIGURATOR bit 2 is set. (SETCON 2) See the stepper motor Chapter for additional information and the __HARDWARE__ Chapter for information on which pin is used for output.
The CONFIGURATOR variable is used to turn on and off individual PicPuter features. PicPuter was designed to be highly configurable, some pins on the chip have a dual purpose. For instance six bits of PORTB can be used to drive an LCD Character Display. If the LCD bit is set then PORTB generates the signals for the display. When the LCD bit is Cleared then PORTB remains untouched.
Individual bits can be set in the configurator with the commands such as; set configurator , 2 clr configurator ,2 or one of its many contractions like 'SETCON2' or 'CLRCON2'
A fine adjustment for the real time clock. (16 bit) Because most crystals are slightly off in frequency, the internal clock may run a little fast or slow. The frequency also drifts with age. This variable acts as a fine adjustment for the clock. A course adjustment is available in the PICs PR2 register. The lower 8 bits are treated as a signed 8 bit value added to the HUND register every minute except minute 0. The upper 8 bits are added to HUND every hour.
Event Flags (16 bit)
Each bit is set whenever the event occurs. They are only cleared manually, ei the pause command. The lower 8 bits are used by the PAUSE command.
Hour of the Week (8 bit) Contains the current Hour of the week.
Hundredths of a Second (8 bit) Contains the current hundredths of a second.
Minute (8 bit) Contains the current Minute.
Multiply Most Significant Bit (8 bit) Contains the upper eight bits of a multiply. This value is invalid if the first number of the multiply is negative. This is due to the optimization technique used. If you are going to need to use this variable, be positive the first value of a multiply is positive, it is negatory to use a negative.
Program Counter (16 bit) Program Counter, fully modifiable. This variable is the line number for the current running statement. If you modify this value, a goto statement is done. You can even use a statement like 'PC += RND AND 3' to randomly jump to one of the next 4 statements. ;Using the PC Register
Pulse Width Modulator 0 Period Register (8 bit) This 8 bit variable sets the period for PWM0. The period register sets the frequency for the PWM output. The default tick for picputer is 1/12 of one micro second, but it may be altered. If the default tick is used, the frequency can be determined by the equation freq=1/(PP0*(1/12000)). The CONFIGURATOR variable bit 2 must be set in order to see any output. See the PWM Chapter for additional information.
Pulse Width Modulator 1 Period Register (8 bit) This 8 bit variable sets the period for PWM1. The period register sets the frequency for the PWM output. The default tick for picputer is 1/12 of one micro second, but it may be altered. If the default tick is used, the frequency can be determined by the equation freq=1/(PP1*(1/12000)). The CONFIGURATOR variable bit 2 must be set in order to see any output. See the PWM Chapter for additional information.
Pulse Width Modulator 2 Period Register (8 bit) This 8 bit variable sets the period for PWM2. The period register sets the frequency for the PWM output. The default tick for picputer is 1/12 of one micro second, but it may be altered. If the default tick is used, the frequency can be determined by the equation freq=1/(PP2*(1/12000)). The CONFIGURATOR variable bit 2 must be set in order to see any output. See the PWM Chapter for additional information.
Pulse Width Modulator 3 Period Register (8 bit) This 8 bit variable sets the period for PWM3. The period register sets the frequency for the PWM output. The default tick for picputer is 1/12 of one micro second, but it may be altered. If the default tick is used, the frequency can be determined by the equation freq=1/(PP3*(1/12000)). The CONFIGURATOR variable bit 2 must be set in order to see any output. See the PWM Chapter for additional information.
Pulse Width Modulator 0 Width Register (8 bit) This 8 bit variable sets the width for PWM0 Unit. If the value is zero the pin will always be low. If the value is less than PP0 the pin will be high for PW0 TICKS. If this value is greater than PP0 the pin will always be high. The CONFIGURATOR variable bit 2 must be set in order to see any output. See the PWM Chapter for additional information.
Pulse Width Modulator 1 Width Register (8 bit) This 8 bit variable sets the width for PWM1 Unit. If the value is zero the pin will always be low. If the value is less than PP1 the pin will be high for PW1 TICKS. If this value is greater than PP1 the pin will always be high. The CONFIGURATOR variable bit 2 must be set in order to see any output. See the PWM Chapter for additional information.
Pulse Width Modulator 2 Width Register (8 bit) This 8 bit variable sets the width for PWM2 Unit. If the value is zero the pin will always be low. If the value is less than PP2 the pin will be high for PW2 TICKS. If this value is greater than PP2 the pin will always be high. The CONFIGURATOR variable bit 2 must be set in order to see any output. See the PWM Chapter for additional information.
Pulse Width Modulator 3 Width Register (8 bit) This 8 bit variable sets the width for PWM3 Unit. If the value is zero the pin will always be low. If the value is less than PP3 the pin will be high for PW3 TICKS. If this value is greater than PP3 the pin will always be high. The CONFIGURATOR variable bit 2 must be set in order to see any output. See the PWM Chapter for additional information.
Reset Count (16 bit) Increments whenever a reset occurs. Cleared at Power On reset.
Random Number (16 bit) The random number generator is a free running random number generator based on a random bit-stream algorithm. The state of the carry flag and the W register is also used to increase the randomness. The random number is changed about 2 times per microsecond provided the CONFIGURATOR RANDOM bit (1) is set. If this bit is cleared the random number will not change unless the RANDOMIZE statement is executed. This is usefully to create a specific sequence of random numbers.
Current Second (8 bit) Contains the Second for the real time clock.
Stack Pointer (8 bit) The stack pointer is an address pointer for the basic stack. The basic stack is used to store temporary data during a for-next or do while loop and the return address whenever a GOSUB is called. The statements PUSH and POP also modify the stack pointer. The stack is 78 bytes deep.
Ticks Per Hundredth (8 bit) This variable is used to keep the real time clock accurate. Its value represents the number of timer2 IRQs that occurs per hundredth of a second. Note:This value must be a factor of 8 if ADC or LCD is used.
MPU Usage (16 bit) Contains the mpu usage for the last ?? mS. The larger the value the more MPU cycles went unused. The CONFIGURATOR USAGE bit (8) must be set for the variable to update. This value may be represented as a pulse width modulated signal, by setting the CONFIGURATOR USAGE_PIN bit (9). |
6.0 Variable Reference