114 lines
2.8 KiB
Plaintext
114 lines
2.8 KiB
Plaintext
(*
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Пример для STM32L152C-DISCO
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При нажатии на кнопку USER (PA0), меняется
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состояние светодиодов.
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*)
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MODULE Button;
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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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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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NVIC = 0E000E100H;
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NVIC_ISER0 = NVIC;
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NVIC_ISER1 = NVIC + 04H;
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NVIC_ISER2 = NVIC + 08H;
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NVIC_ICER0 = NVIC + 80H;
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NVIC_ICER1 = NVIC + 84H;
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NVIC_ICER2 = NVIC + 88H;
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EXTI = 040010400H;
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EXTI_IMR = EXTI;
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EXTI_RTSR = EXTI + 08H;
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EXTI_FTSR = EXTI + 0CH;
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EXTI_PR = EXTI + 14H;
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LINE0 = {0};
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Blue = 6;
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Green = 7;
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VAR
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x: SET;
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state: INTEGER;
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(* обработчик прерываний от EXTI0 *)
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PROCEDURE PushButton [22];
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BEGIN
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SYSTEM.PUT(EXTI_PR, LINE0); (* сбросить флаг прерывания *)
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state := (state + 1) MOD 4;
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(* изменить состояние светодиодов *)
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CASE state OF
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|0: SYSTEM.PUT(GPIOBBSRR, {Blue + 16, Green + 16})
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|1: SYSTEM.PUT(GPIOBBSRR, {Blue, Green + 16})
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|2: SYSTEM.PUT(GPIOBBSRR, {Blue + 16, Green})
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|3: SYSTEM.PUT(GPIOBBSRR, {Blue, Green})
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END
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END PushButton;
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BEGIN
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state := 0;
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(* подключить GPIOA и GPIOB *)
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SYSTEM.GET(RCC_AHBENR, x);
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SYSTEM.PUT(RCC_AHBENR, x + {0, 1});
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(* настроить PB6 и PB7 на выход *)
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SYSTEM.GET(GPIOBMODER, x);
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SYSTEM.PUT(GPIOBMODER, x + {12, 14} - {13, 15});
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(* настроить PA0 на вход *)
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SYSTEM.GET(GPIOAMODER, x);
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SYSTEM.PUT(GPIOAMODER, x - {0, 1});
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(* разрешить прерывания от EXTI0 (позиция 6) *)
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SYSTEM.PUT(NVIC_ISER0, {6});
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(* разрешить прерывания от LINE0 по нарастающему краю импульса *)
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SYSTEM.PUT(EXTI_IMR, LINE0);
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SYSTEM.PUT(EXTI_RTSR, LINE0);
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END Button. |