pass5.dat

FPGA 基于PICOBLAZE内核的LCD显示程序,完整,XILINX

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    COMMENT-; KCPSM3 Program - Control and calculation for Frequency Generator design using the
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    COMMENT-;                 Spartan-3E Starter Kit.
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    COMMENT-; Interfaces with the rotary encoder and LCD display to enable a frequency to be set.
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    COMMENT-; Converts the BCD frequency value into a binary integer and then performs the high
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    COMMENT-; precision calculation necessary to derive the control numbers required by the high
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    COMMENT-; performance Direct Digital Synthesis (DDS) circuit implemented in hardware.
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    COMMENT-; LEDs are connected and used as edit mode indicators.
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    COMMENT-;
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    COMMENT-; Substantial comments are included in line with the code below and should be used
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    COMMENT-; in conjunction with the documentation provided with the complete reference design.
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    COMMENT-;
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    COMMENT-;
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    COMMENT-;
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    COMMENT-; Ken Chapman - Xilinx Ltd
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    COMMENT-;
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    COMMENT-; Version v1.00 - 13th July 2006
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    COMMENT-;
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    COMMENT-;**************************************************************************************
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    COMMENT-;Port definitions
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    COMMENT-;**************************************************************************************
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    COMMENT-;
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    COMMENT-;
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    COMMENT-;LCD interface ports
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    COMMENT-;
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    COMMENT-;The master enable signal is not used by the LCD display itself
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    COMMENT-;but may be required to confirm that LCD communication is active.
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    COMMENT-;This is required on the Spartan-3E Starter Kit if the StrataFLASH
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    COMMENT-;is used because it shares the same data pins and conflicts must be avoided.
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    COMMENT-;
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  FORMATTED-CONSTANT LCD_output_port, 40
  LOGFORMAT-CONSTANT LCD_output_port, 40
INSTRUCTION-CONSTANT
   OPERAND1-LCD_output_port
  OP1 VALUE-LCD_output_port
   OPERAND2-40
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    COMMENT-;   LCD character module output data and control
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  FORMATTED-CONSTANT LCD_E, 01
  LOGFORMAT-CONSTANT LCD_E, 01
INSTRUCTION-CONSTANT
   OPERAND1-LCD_E
  OP1 VALUE-LCD_E
   OPERAND2-01
  OP2 VALUE-01
    COMMENT-;   active High Enable        E - bit0
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  FORMATTED-CONSTANT LCD_RW, 02
  LOGFORMAT-CONSTANT LCD_RW, 02
INSTRUCTION-CONSTANT
   OPERAND1-LCD_RW
  OP1 VALUE-LCD_RW
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  OP2 VALUE-02
    COMMENT-;   Read=1 Write=0           RW - bit1
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  FORMATTED-CONSTANT LCD_RS, 04
  LOGFORMAT-CONSTANT LCD_RS, 04
INSTRUCTION-CONSTANT
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   OPERAND2-04
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    COMMENT-;   Instruction=0 Data=1     RS - bit2
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    COMMENT-;CONSTANT LCD_drive, 08              ;   Master enable (active High) - bit3
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  FORMATTED-CONSTANT LCD_DB4, 10
  LOGFORMAT-CONSTANT LCD_DB4, 10
INSTRUCTION-CONSTANT
   OPERAND1-LCD_DB4
  OP1 VALUE-LCD_DB4
   OPERAND2-10
  OP2 VALUE-10
    COMMENT-;   4-bit              Data DB4 - bit4
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  FORMATTED-CONSTANT LCD_DB5, 20
  LOGFORMAT-CONSTANT LCD_DB5, 20
INSTRUCTION-CONSTANT
   OPERAND1-LCD_DB5
  OP1 VALUE-LCD_DB5
   OPERAND2-20
  OP2 VALUE-20
    COMMENT-;   interface          Data DB5 - bit5
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  FORMATTED-CONSTANT LCD_DB6, 40
  LOGFORMAT-CONSTANT LCD_DB6, 40
INSTRUCTION-CONSTANT
   OPERAND1-LCD_DB6
  OP1 VALUE-LCD_DB6
   OPERAND2-40
  OP2 VALUE-40
    COMMENT-;                      Data DB6 - bit6
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  FORMATTED-CONSTANT LCD_DB7, 80
  LOGFORMAT-CONSTANT LCD_DB7, 80
INSTRUCTION-CONSTANT
   OPERAND1-LCD_DB7
  OP1 VALUE-LCD_DB7
   OPERAND2-80
  OP2 VALUE-80
    COMMENT-;                      Data DB7 - bit7
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    COMMENT-;
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    COMMENT-;
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  FORMATTED-CONSTANT LCD_input_port, 01
  LOGFORMAT-CONSTANT LCD_input_port, 01
INSTRUCTION-CONSTANT
   OPERAND1-LCD_input_port
  OP1 VALUE-LCD_input_port
   OPERAND2-01
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    COMMENT-;    LCD character module input data
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  FORMATTED-CONSTANT LCD_read_DB4, 10
  LOGFORMAT-CONSTANT LCD_read_DB4, 10
INSTRUCTION-CONSTANT
   OPERAND1-LCD_read_DB4
  OP1 VALUE-LCD_read_DB4
   OPERAND2-10
  OP2 VALUE-10
    COMMENT-;    4-bit           Data DB4 - bit4
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  FORMATTED-CONSTANT LCD_read_DB5, 20
  LOGFORMAT-CONSTANT LCD_read_DB5, 20
INSTRUCTION-CONSTANT
   OPERAND1-LCD_read_DB5
  OP1 VALUE-LCD_read_DB5
   OPERAND2-20
  OP2 VALUE-20
    COMMENT-;    interface       Data DB5 - bit5
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  FORMATTED-CONSTANT LCD_read_DB6, 40
  LOGFORMAT-CONSTANT LCD_read_DB6, 40
INSTRUCTION-CONSTANT
   OPERAND1-LCD_read_DB6
  OP1 VALUE-LCD_read_DB6
   OPERAND2-40
  OP2 VALUE-40
    COMMENT-;                    Data DB6 - bit6
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  FORMATTED-CONSTANT LCD_read_DB7, 80
  LOGFORMAT-CONSTANT LCD_read_DB7, 80
INSTRUCTION-CONSTANT
   OPERAND1-LCD_read_DB7
  OP1 VALUE-LCD_read_DB7
   OPERAND2-80
  OP2 VALUE-80
    COMMENT-;                    Data DB7 - bit7
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    COMMENT-;
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    COMMENT-;
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    COMMENT-;
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    COMMENT-;Control of frequency selection values
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    COMMENT-;
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  FORMATTED-CONSTANT cursor_position, 10
  LOGFORMAT-CONSTANT cursor_position, 10
INSTRUCTION-CONSTANT
   OPERAND1-cursor_position
  OP1 VALUE-cursor_position
   OPERAND2-10
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    COMMENT-; Pointer to edit position on LCD
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    COMMENT-;
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    COMMENT-; ************************
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    COMMENT-;
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    COMMENT-;Constant to define a software delay of 1us. This must be adjusted to reflect the
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    COMMENT-;clock applied to KCPSM3. Every instruction executes in 2 clock cycles making the
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    COMMENT-;calculation highly predictable. The '6' in the following equation even allows for
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    COMMENT-;'CALL delay_1us' instruction in the initiating code.
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    COMMENT-;
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    COMMENT-; delay_1us_constant =  (clock_rate - 6)/4       Where 'clock_rate' is in MHz
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    COMMENT-;
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    COMMENT-;Example: For a 50MHz clock the constant value is (50-6)/4 = 11  (0B Hex).
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    COMMENT-;For clock rates below 10MHz the value of 1 must be used and the operation will
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    COMMENT-;become lower than intended.
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