366 lines
8.8 KiB
Plaintext
366 lines
8.8 KiB
Plaintext
(*
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Пример для STM32L152C-DISCO
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Работа со встроенным ЖКИ.
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использовано:
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https://habr.com/ru/post/173709/
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*)
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MODULE LCD;
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IMPORT SYSTEM;
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CONST
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GPIOA = 40020000H;
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GPIOAMODER = GPIOA;
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GPIOAOTYPER = GPIOA + 04H;
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GPIOAOSPEEDR = GPIOA + 08H;
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GPIOAPUPDR = GPIOA + 0CH;
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GPIOAIDR = GPIOA + 10H;
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GPIOAODR = GPIOA + 14H;
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GPIOABSRR = GPIOA + 18H;
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GPIOALCKR = GPIOA + 1CH;
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GPIOAAFRL = GPIOA + 20H;
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GPIOAAFRH = GPIOA + 24H;
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GPIOABRR = GPIOA + 28H;
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GPIOB = 40020400H;
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GPIOBMODER = GPIOB;
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GPIOBOTYPER = GPIOB + 04H;
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GPIOBOSPEEDR = GPIOB + 08H;
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GPIOBPUPDR = GPIOB + 0CH;
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GPIOBIDR = GPIOB + 10H;
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GPIOBODR = GPIOB + 14H;
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GPIOBBSRR = GPIOB + 18H;
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GPIOBLCKR = GPIOB + 1CH;
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GPIOBAFRL = GPIOB + 20H;
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GPIOBAFRH = GPIOB + 24H;
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GPIOBBRR = GPIOB + 28H;
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GPIOC = 40020800H;
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GPIOCMODER = GPIOC;
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GPIOCOTYPER = GPIOC + 04H;
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GPIOCOSPEEDR = GPIOC + 08H;
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GPIOCPUPDR = GPIOC + 0CH;
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GPIOCIDR = GPIOC + 10H;
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GPIOCODR = GPIOC + 14H;
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GPIOCBSRR = GPIOC + 18H;
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GPIOCLCKR = GPIOC + 1CH;
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GPIOCAFRL = GPIOC + 20H;
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GPIOCAFRH = GPIOC + 24H;
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GPIOCBRR = GPIOC + 28H;
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RCC = 40023800H;
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RCC_CR = RCC;
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RCC_AHBENR = RCC + 1CH;
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RCC_APB2ENR = RCC + 20H;
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RCC_APB1ENR = RCC + 24H;
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RCC_CSR = RCC + 34H;
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PWR = 40007000H;
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PWR_CR = PWR;
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LCD = 40002400H;
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LCD_CR = LCD;
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LCD_FCR = LCD + 04H;
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LCD_SR = LCD + 08H;
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LCD_RAM = LCD + 14H;
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AFM = 2;
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AF11 = 11;
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PinsA = {1..3, 8..10, 15};
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PinsB = {3..5, 8..15};
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PinsC = {0..3, 6..11};
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A = 0; H = 7;
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B = 1; J = 8;
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C = 2; K = 9;
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D = 3; M = 10;
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E = 4; N = 11;
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F = 5; P = 12;
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G = 6; Q = 13;
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DP = 14; COLON = 15; BAR = 16;
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VAR
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display: ARRAY 6, 17 OF INTEGER;
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digits: ARRAY 10 OF SET;
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PROCEDURE SetPinsMode (reg: INTEGER; pins: SET; mode: INTEGER);
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VAR
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x: SET;
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pin: INTEGER;
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BEGIN
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mode := mode MOD 4;
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SYSTEM.GET(reg, x);
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FOR pin := 0 TO 30 BY 2 DO
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IF (pin DIV 2) IN pins THEN
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x := x - {pin, pin + 1} + BITS(LSL(mode, pin))
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END
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END;
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SYSTEM.PUT(reg, x)
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END SetPinsMode;
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PROCEDURE SRBits (adr: INTEGER; setbits, resetbits: SET);
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VAR
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x: SET;
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BEGIN
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SYSTEM.GET(adr, x);
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SYSTEM.PUT(adr, x - resetbits + setbits)
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END SRBits;
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PROCEDURE SetBits (adr: INTEGER; bits: SET);
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VAR
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x: SET;
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BEGIN
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SYSTEM.GET(adr, x);
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SYSTEM.PUT(adr, x + bits)
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END SetBits;
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PROCEDURE ResetBits (adr: INTEGER; bits: SET);
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VAR
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x: SET;
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BEGIN
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SYSTEM.GET(adr, x);
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SYSTEM.PUT(adr, x - bits)
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END ResetBits;
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PROCEDURE TestBits (adr: INTEGER; bits: SET): BOOLEAN;
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VAR
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x: SET;
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BEGIN
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SYSTEM.GET(adr, x);
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RETURN x * bits = bits
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END TestBits;
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PROCEDURE Init;
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VAR
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i, j: INTEGER;
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seg: ARRAY 30 OF INTEGER;
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BEGIN
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FOR i := 0 TO 29 DO
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seg[i] := i
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END;
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FOR i := 3 TO 11 DO
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seg[i] := i + 4
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END;
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seg[18] := 17;
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seg[19] := 16;
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FOR i := 20 TO 23 DO
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seg[i] := i - 2
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END;
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j := 0;
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FOR i := 0 TO 5 DO
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display[i, A] := 256 + seg[28 - j];
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display[i, B] := 0 + seg[28 - j];
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display[i, C] := 256 + seg[j + 1];
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display[i, D] := 256 + seg[j];
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display[i, E] := 0 + seg[j];
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display[i, F] := 256 + seg[29 - j];
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display[i, G] := 0 + seg[29 - j];
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display[i, H] := 768 + seg[29 - j];
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display[i, J] := 768 + seg[28 - j];
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display[i, K] := 512 + seg[28 - j];
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display[i, M] := 0 + seg[j + 1];
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display[i, N] := 768 + seg[j];
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display[i, P] := 512 + seg[j];
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display[i, Q] := 512 + seg[29 - j];
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INC(j, 2)
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END;
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display[0, DP] := 768 + 1;
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display[1, DP] := 768 + 7;
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display[2, DP] := 768 + 9;
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display[3, DP] := 768 + 11;
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display[0, COLON] := 512 + 1;
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display[1, COLON] := 512 + 7;
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display[2, COLON] := 512 + 9;
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display[3, COLON] := 512 + 11;
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display[0, BAR] := 768 + 15;
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display[1, BAR] := 512 + 15;
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display[2, BAR] := 768 + 13;
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display[3, BAR] := 512 + 13;
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digits[0] := {A, B, C, D, E, F};
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digits[1] := {B, C};
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digits[2] := {A, B, M, G, E, D};
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digits[3] := {A, B, M, G, C, D};
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digits[4] := {F, G, M, B, C};
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digits[5] := {A, F, G, M, C, D};
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digits[6] := {A, F, G, M, C, D, E};
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digits[7] := {F, A, B, C};
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digits[8] := {A, B, C, D, E, F, G, M};
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digits[9] := {A, B, C, D, F, G, M};
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END Init;
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PROCEDURE ResetSeg (seg: INTEGER);
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BEGIN
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ResetBits(LCD_RAM + (seg DIV 256) * 2 * 4, {seg MOD 256})
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END ResetSeg;
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PROCEDURE SetSeg (seg: INTEGER);
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BEGIN
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SetBits(LCD_RAM + (seg DIV 256) * 2 * 4, {seg MOD 256})
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END SetSeg;
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PROCEDURE Digit (pos, dgt: INTEGER);
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VAR
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s: SET;
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i: INTEGER;
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BEGIN
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s := digits[dgt];
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FOR i := 0 TO 13 DO
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IF i IN s THEN
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SetSeg(display[pos, i])
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ELSE
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ResetSeg(display[pos, i])
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END
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END
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END Digit;
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PROCEDURE WhileBits (adr: INTEGER; bits: SET);
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BEGIN
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WHILE TestBits(adr, bits) DO END
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END WhileBits;
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PROCEDURE UntilBits (adr: INTEGER; bits: SET);
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BEGIN
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REPEAT UNTIL TestBits(adr, bits)
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END UntilBits;
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PROCEDURE main;
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VAR
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i: INTEGER;
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BEGIN
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Init;
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(* подключить GPIOA, GPIOB, GPIOC *)
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SetBits(RCC_AHBENR, {0, 1, 2});
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(* настроить на режим альтернативной функции *)
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SetPinsMode(GPIOAMODER, PinsA, AFM);
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(* 400 кГц *)
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SetPinsMode(GPIOAOSPEEDR, PinsA, 0);
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(* без подтягивающих резисторов *)
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SetPinsMode(GPIOAPUPDR, PinsA, 0);
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(* режим push-pull *)
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ResetBits(GPIOAOTYPER, PinsA);
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(* альтернативная функция AF11 = 0BH *)
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SYSTEM.PUT(GPIOAAFRL, 0BBB0H);
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SYSTEM.PUT(GPIOAAFRH, 0B0000BBBH);
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(* аналогично для GPIOB *)
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SetPinsMode(GPIOBMODER, PinsB, AFM);
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SetPinsMode(GPIOBOSPEEDR, PinsB, 0);
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SetPinsMode(GPIOBPUPDR, PinsB, 0);
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ResetBits(GPIOBOTYPER, PinsB);
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SYSTEM.PUT(GPIOBAFRL, 000BBB000H);
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SYSTEM.PUT(GPIOBAFRH, 0BBBBBBBBH);
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(* аналогично для GPIOC *)
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SetPinsMode(GPIOCMODER, PinsC, AFM);
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SetPinsMode(GPIOCOSPEEDR, PinsC, 0);
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SetPinsMode(GPIOCPUPDR, PinsC, 0);
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ResetBits(GPIOCOTYPER, PinsC);
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SYSTEM.PUT(GPIOCAFRL, 0BB00BBBBH);
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SYSTEM.PUT(GPIOCAFRH, 00000BBBBH);
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(* подключить контроллер ЖКИ *)
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SetBits(RCC_APB1ENR, {9, 28}); (* LCDEN = {9}; PWREN = {28} *)
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(* разрешить запись в регистр RCC_CSR *)
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SetBits(PWR_CR, {8}); (* DBP = {8} *)
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(* сбросить источник тактирования *)
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SetBits(RCC_CSR, {23}); (* RTCRST = {23} *)
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(* выбрать новый источник *)
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ResetBits(RCC_CSR, {23}); (* RTCRST = {23} *)
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(* включить НЧ генератор *)
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SetBits(RCC_CSR, {8}); (* LSEON = {8} *)
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(* ждать готовность НЧ генератора *)
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UntilBits(RCC_CSR, {9}); (* LSERDY = {9} *)
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(* выбрать НЧ генератор как источник тактирования *)
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SRBits(RCC_CSR, {16}, {17}); (* RCC_CSR[17:16] := 01b *)
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(* настроить контроллер ЖКИ *)
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SRBits(LCD_CR, {2, 3, 6, 7}, {4, 5}); (* MUX_SEG = {7}; BIAS1 = {6}; BIAS0 = {5}; DUTY2 = {4}; DUTY1 = {3}; DUTY0 = {2} *)
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(* Установить значения коэффициентов деления частоты тактового сигнала LCDCLK *)
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SRBits(LCD_FCR, {11, 18, 24}, {10..12, 18..25}); (* LCD_FCR[12:10] := 010b; LCD_FCR[21:18] := 0001b; LCD_FCR[25:22] := 0100b *)
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(* ждать синхронизацию регистра LCD_FCR *)
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UntilBits(LCD_SR, {5}); (* FCRSF = {5} *)
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(* выбрать внутренний источник напряжения для ЖКИ и разрешить его работу *)
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SRBits(LCD_CR, {0}, {1}); (* LCD_CR_VSEL = {1}; LCD_CR_LCDEN = {0} *)
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(* ждать готовность контроллера ЖКИ *)
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UntilBits(LCD_SR, {0, 4}); (* LCD_SR_RDY = {4}; LCD_SR_ENS = {0} *)
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(* ждать завершение предыдущей записи *)
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WhileBits(LCD_SR, {2}); (* LCD_SR_UDR = {2} *)
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(* начать запись *)
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FOR i := 0 TO 5 DO
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Digit(i, i + 1) (* 123456 *)
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END;
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SetSeg(display[1, DP]); (* 12.3456 *)
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SetSeg(display[3, COLON]); (* 12.34:56 *)
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SetSeg(display[0, BAR]); (* 12.34:56_ *)
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(* завершить запись *)
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SetBits(LCD_SR, {2}) (* LCD_SR_UDR = {2} *)
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END main;
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BEGIN
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main
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END LCD. |