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global: fix button EXTI

This commit is contained in:
King Kévin 2020-02-09 18:36:54 +01:00
parent f54d3f0fd2
commit 221db23430
1 changed files with 5 additions and 5 deletions
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10
global.c
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@ -196,20 +196,20 @@ void board_setup(void)
#endif // LED_PIN
// setup button
#if defined(BUTTON_PORT) && defined(BUTTON_PIN)
#if defined(BUTTON_PIN)
rcc_periph_clock_enable(GPIO_RCC(BUTTON_PIN)); // enable clock for button
gpio_set_mode(GPIO_PORT(BUTTON_PIN), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO(BUTTON_PIN)); // set button pin to input
gpio_set_mode(GPIO_PORT(BUTTON_PIN), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO_PIN(BUTTON_PIN)); // set button pin to input
rcc_periph_clock_enable(RCC_AFIO); // enable alternate function clock for external interrupt
exti_select_source(GPIO_EXTI(BUTTON_PIN), GPIO_PORT(BUTTON_PIN)); // mask external interrupt of this pin only for this port
#if defined(BUTTON_PRESSED) && BUTTON_PRESSED
gpio_clear(GPIO_PORT(BUTTON_PIN), GPIO(BUTTON_PIN)); // pull down to be able to detect button push (go high)
gpio_clear(GPIO_PORT(BUTTON_PIN), GPIO_PIN(BUTTON_PIN)); // pull down to be able to detect button push (go high)
exti_set_trigger(GPIO_EXTI(BUTTON_PIN), EXTI_TRIGGER_RISING); // trigger when button is pressed
#else
gpio_set(GPIO_PORT(BUTTON_PIN), GPIO(BUTTON_PIN)); // pull up to be able to detect button push (go low)
gpio_set(GPIO_PORT(BUTTON_PIN), GPIO_PIN(BUTTON_PIN)); // pull up to be able to detect button push (go low)
exti_set_trigger(GPIO_EXTI(BUTTON_PIN), EXTI_TRIGGER_FALLING); // trigger when button is pressed
#endif
exti_enable_request(GPIO_EXTI(BUTTON_PIN)); // enable external interrupt
nvic_enable_irq(NVIC_EXTI_IRQ(BUTTON_PIN)); // enable interrupt
nvic_enable_irq(GPIO_NVIC_EXTI_IRQ(BUTTON_PIN)); // enable interrupt
#endif
// reset user input buffer