fg_ctrl.rmh

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/* Symbol Table */
// BCD_digit0 = CONSTANT: 3
// BCD_digit1 = CONSTANT: 4
// BCD_digit2 = CONSTANT: 5
// BCD_digit3 = CONSTANT: 6
// BCD_digit4 = CONSTANT: 7
// BCD_digit5 = CONSTANT: 8
// BCD_digit6 = CONSTANT: 9
// BCD_digit7 = CONSTANT: 10
// BCD_digit8 = CONSTANT: 11
// BCD_digit_convert = LABEL: 241
// BCD_to_integer = LABEL: 229
// DDS_control0 = CONSTANT: 28
// DDS_control0_port = CONSTANT: 2
// DDS_control1 = CONSTANT: 29
// DDS_control1_port = CONSTANT: 4
// DDS_control2 = CONSTANT: 30
// DDS_control2_port = CONSTANT: 8
// DDS_control3 = CONSTANT: 31
// DDS_control3_port = CONSTANT: 16
// DDS_scaling = CONSTANT: 32
// DDS_scaling_port = CONSTANT: 32
// ISR = LABEL: 568
// ISR_preserve_s0 = CONSTANT: 1
// LCD_DB4 = CONSTANT: 16
// LCD_DB5 = CONSTANT: 32
// LCD_DB6 = CONSTANT: 64
// LCD_DB7 = CONSTANT: 128
// LCD_E = CONSTANT: 1
// LCD_RS = CONSTANT: 4
// LCD_RW = CONSTANT: 2
// LCD_clear = LABEL: 550
// LCD_cursor = LABEL: 555
// LCD_drive = CONSTANT: 8
// LCD_input_port = CONSTANT: 1
// LCD_output_port = CONSTANT: 64
// LCD_pulse_E = LABEL: 466
// LCD_read_DB4 = CONSTANT: 16
// LCD_read_DB5 = CONSTANT: 32
// LCD_read_DB6 = CONSTANT: 64
// LCD_read_DB7 = CONSTANT: 128
// LCD_read_data8 = LABEL: 508
// LCD_reset = LABEL: 533
// LCD_shift_left = LABEL: 565
// LCD_write_data = LABEL: 491
// LCD_write_inst4 = LABEL: 472
// LCD_write_inst8 = LABEL: 476
// LED0 = CONSTANT: 1
// LED1 = CONSTANT: 2
// LED2 = CONSTANT: 4
// LED3 = CONSTANT: 8
// LED4 = CONSTANT: 16
// LED5 = CONSTANT: 32
// LED6 = CONSTANT: 64
// LED7 = CONSTANT: 128
// LED_pattern = CONSTANT: 2
// LED_port = CONSTANT: 128
// blank_100M_digit = LABEL: 190
// blank_10M_digit = LABEL: 196
// character_0 = CONSTANT: 48
// character_1 = CONSTANT: 49
// character_2 = CONSTANT: 50
// character_3 = CONSTANT: 51
// character_4 = CONSTANT: 52
// character_5 = CONSTANT: 53
// character_6 = CONSTANT: 54
// character_7 = CONSTANT: 55
// character_8 = CONSTANT: 56
// character_9 = CONSTANT: 57
// character_A = CONSTANT: 65
// character_B = CONSTANT: 66
// character_BS = CONSTANT: 8
// character_C = CONSTANT: 67
// character_CR = CONSTANT: 13
// character_D = CONSTANT: 68
// character_E = CONSTANT: 69
// character_F = CONSTANT: 70
// character_G = CONSTANT: 71
// character_H = CONSTANT: 72
// character_I = CONSTANT: 73
// character_J = CONSTANT: 74
// character_K = CONSTANT: 75
// character_L = CONSTANT: 76
// character_M = CONSTANT: 77
// character_N = CONSTANT: 78
// character_O = CONSTANT: 79
// character_P = CONSTANT: 80
// character_Q = CONSTANT: 81
// character_R = CONSTANT: 82
// character_S = CONSTANT: 83
// character_T = CONSTANT: 84
// character_U = CONSTANT: 85
// character_V = CONSTANT: 86
// character_W = CONSTANT: 87
// character_X = CONSTANT: 88
// character_Y = CONSTANT: 89
// character_Z = CONSTANT: 90
// character_a = CONSTANT: 97
// character_b = CONSTANT: 98
// character_c = CONSTANT: 99
// character_colon = CONSTANT: 58
// character_comma = CONSTANT: 44
// character_d = CONSTANT: 100
// character_divide = CONSTANT: 47
// character_dollar = CONSTANT: 36
// character_e = CONSTANT: 101
// character_equals = CONSTANT: 61
// character_exclaim = CONSTANT: 33
// character_f = CONSTANT: 102
// character_g = CONSTANT: 103
// character_greater_than = CONSTANT: 62
// character_h = CONSTANT: 104
// character_i = CONSTANT: 105
// character_j = CONSTANT: 106
// character_k = CONSTANT: 107
// character_l = CONSTANT: 108
// character_less_than = CONSTANT: 60
// character_m = CONSTANT: 109
// character_minus = CONSTANT: 45
// character_n = CONSTANT: 110
// character_o = CONSTANT: 111
// character_p = CONSTANT: 112
// character_plus = CONSTANT: 43
// character_q = CONSTANT: 113
// character_question = CONSTANT: 63
// character_r = CONSTANT: 114
// character_s = CONSTANT: 115
// character_semi_colon = CONSTANT: 59
// character_space = CONSTANT: 32
// character_stop = CONSTANT: 46
// character_t = CONSTANT: 116
// character_u = CONSTANT: 117
// character_v = CONSTANT: 118
// character_w = CONSTANT: 119
// character_x = CONSTANT: 120
// character_y = CONSTANT: 121
// character_z = CONSTANT: 122
// cold_start = LABEL: 0
// compute_DDS_words = LABEL: 132
// cursor_position = CONSTANT: 16
// dec_borrow = LABEL: 91
// dec_digit = LABEL: 85
// delay_1ms = LABEL: 451
// delay_1s = LABEL: 461
// delay_1us = LABEL: 442
// delay_1us_constant = CONSTANT: 11
// delay_20ms = LABEL: 456
// delay_40us = LABEL: 446
// disp32_loop = LABEL: 389
// disp_1M_digit = LABEL: 197
// disp_Frequency = LABEL: 395
// disp_Generator = LABEL: 414
// display_3_digits = LABEL: 216
// display_DDS_data = LABEL: 349
// display_digit = LABEL: 223
// display_freq = LABEL: 180
// display_hex_32_bit = LABEL: 388
// display_hex_byte = LABEL: 382
// display_space = LABEL: 226
// drive_DDS_words = LABEL: 169
// edit_digit_pointer = CONSTANT: 17
// edit_display = LABEL: 70
// edit_mode = LABEL: 69
// edit_point_update = LABEL: 66
// edit_wait = LABEL: 74
// end_edit_mode = LABEL: 123
// fill_max = LABEL: 118
// fill_min = LABEL: 99
// frequency0 = CONSTANT: 12
// frequency1 = CONSTANT: 13
// frequency2 = CONSTANT: 14
// frequency3 = CONSTANT: 15
// hex_byte_to_ASCII = LABEL: 365
// hex_to_ASCII = LABEL: 377
// inc_carry = LABEL: 110
// inc_digit = LABEL: 104
// move_left = LABEL: 47
// move_mode = LABEL: 31
// move_right = LABEL: 57
// move_wait = LABEL: 35
// next_BCD_to_int_digit = LABEL: 240
// next_digit_value = LABEL: 257
// normalise_loop = LABEL: 144
// number_char = LABEL: 380
// product0 = CONSTANT: 18
// product1 = CONSTANT: 19
// product2 = CONSTANT: 20
// product3 = CONSTANT: 21
// product4 = CONSTANT: 22
// product5 = CONSTANT: 23
// product6 = CONSTANT: 24
// product7 = CONSTANT: 25
// product8 = CONSTANT: 26
// product9 = CONSTANT: 27
// product_shift = LABEL: 316
// rotary_event = CONSTANT: 128
// rotary_left = CONSTANT: 1
// rotary_port = CONSTANT: 0
// rotary_press = CONSTANT: 2
// rotary_status = CONSTANT: 0
// s0 = REGISTER: 0
// s1 = REGISTER: 1
// s2 = REGISTER: 2
// s3 = REGISTER: 3
// s4 = REGISTER: 4
// s5 = REGISTER: 5
// s6 = REGISTER: 6
// s7 = REGISTER: 7
// s8 = REGISTER: 8
// s9 = REGISTER: 9
// sA = REGISTER: 10
// sB = REGISTER: 11
// sC = REGISTER: 12
// sD = REGISTER: 13
// sE = REGISTER: 14
// sF = REGISTER: 15
// scale_constant0 = CONSTANT: 98
// scale_constant1 = CONSTANT: 132
// scale_constant2 = CONSTANT: 17
// scale_constant3 = CONSTANT: 119
// scale_constant4 = CONSTANT: 204
// scale_constant5 = CONSTANT: 171
// scale_frequency = LABEL: 281
// scale_mult_bit = LABEL: 293
// set_line2 = LABEL: 561
// set_max_value = LABEL: 116
// set_min_value = LABEL: 97
// shift80_left = LABEL: 161
// skip_left = LABEL: 55
// skip_right = LABEL: 65
// store_DDS_words = LABEL: 154
// threedigit_loop = LABEL: 217
// wait_1ms = LABEL: 452
// wait_1s = LABEL: 462
// wait_1us = LABEL: 443
// wait_20ms = LABEL: 457
// wait_40us = LABEL: 447
// wait_switch_release = LABEL: 125

/* Program Code */
// #1: ; KCPSM3 Program - Control and calculation for Frequency Generator design using the
// #2: ;                 Spartan-3E Starter Kit.
// #3: ;
// #4: ; Interfaces with the rotary encoder and LCD display to enable a frequency to be set.
// #5: ; Converts the BCD frequency value into a binary integer and then performs the high
// #6: ; precision calculation necessary to derive the control numbers required by the high
// #7: ; performance Direct Digital Synthesis (DDS) circuit implemented in hardware.
// #8: ;
// #9: ; LEDs are connected and used as edit mode indicators.
// #10: ;
// #11: ; Substantial comments are included in line with the code below and should be used
// #12: ; in conjunction with the documentation provided with the complete reference design.
// #13: ;
// #14: ;
// #15: ;
// #16: ; Ken Chapman - Xilinx Ltd
// #17: ;
// #18: ; Version v1.00 - 13th July 2006
// #19: ;
// #20: ;**************************************************************************************
// #21: ;Port definitions
// #22: ;**************************************************************************************
// #23: ;
// #24: ;
// #25: ;
// #26: CONSTANT(LED_port,128) ;8 simple LEDs
// #27: CONSTANT(LED0,1) ;     LED 0 - bit0
// #28: CONSTANT(LED1,2) ;         1 - bit1
// #29: CONSTANT(LED2,4) ;         2 - bit2
// #30: CONSTANT(LED3,8) ;         3 - bit3
// #31: CONSTANT(LED4,16) ;         4 - bit4
// #32: CONSTANT(LED5,32) ;         5 - bit5
// #33: CONSTANT(LED6,64) ;         6 - bit6
// #34: CONSTANT(LED7,128) ;         7 - bit7
// #35: ;
// #36: ;
// #37: CONSTANT(rotary_port,0) ;Read status of rotary encoder
// #38: CONSTANT(rotary_left,1) ; Direction of last move Left=1 Right=0  - bit0
// #39: CONSTANT(rotary_press,2) ;     Centre press contact (active High) - bit1
// #40: ;
// #41: ;
// #42: ;LCD interface ports
// #43: ;
// #44: ;The master enable signal is not used by the LCD display itself
// #45: ;but may be required to confirm that LCD communication is active.
// #46: ;This is required on the Spartan-3E Starter Kit if the StrataFLASH
// #47: ;is used because it shares the same data pins and conflicts must be avoided.
// #48: ;
// #49: CONSTANT(LCD_output_port,64) ;LCD character module output data and control
// #50: CONSTANT(LCD_E,1) ;   active High Enable        E - bit0
// #51: CONSTANT(LCD_RW,2) ;   Read=1 Write=0           RW - bit1
// #52: CONSTANT(LCD_RS,4) ;   Instruction=0 Data=1     RS - bit2
// #53: CONSTANT(LCD_drive,8) ;   Master enable (active High) - bit3
// #54: CONSTANT(LCD_DB4,16) ;   4-bit              Data DB4 - bit4
// #55: CONSTANT(LCD_DB5,32) ;   interface          Data DB5 - bit5
// #56: CONSTANT(LCD_DB6,64) ;                      Data DB6 - bit6