mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_irq_api.c
- Revision:
- 216:577900467c9e
- Parent:
- 156:38b9eb24e1d1
- Child:
- 250:a49055e7a707
--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_irq_api.c Tue May 27 08:30:06 2014 +0100 +++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/gpio_irq_api.c Tue May 27 10:00:08 2014 +0100 @@ -53,26 +53,30 @@ uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]); // Clear interrupt flag - if (EXTI_GetITStatus(pin) != RESET) - { + if (EXTI_GetITStatus(pin) != RESET) { EXTI_ClearITPendingBit(pin); } - + if (channel_ids[irq_index] == 0) return; - + // Check which edge has generated the irq if ((gpio->IDR & pin) == 0) { irq_handler(channel_ids[irq_index], IRQ_FALL); - } - else { + } else { irq_handler(channel_ids[irq_index], IRQ_RISE); } } // The irq_index is passed to the function -static void gpio_irq0(void) {handle_interrupt_in(0);} -static void gpio_irq1(void) {handle_interrupt_in(1);} -static void gpio_irq2(void) {handle_interrupt_in(2);} +static void gpio_irq0(void) { + handle_interrupt_in(0); +} +static void gpio_irq1(void) { + handle_interrupt_in(1); +} +static void gpio_irq2(void) { + handle_interrupt_in(2); +} extern uint32_t Set_GPIO_Clock(uint32_t port_idx); @@ -91,18 +95,15 @@ irq_n = EXTI0_1_IRQn; vector = (uint32_t)&gpio_irq0; irq_index = 0; - } - else if ((pin_index == 2) || (pin_index == 3)) { + } else if ((pin_index == 2) || (pin_index == 3)) { irq_n = EXTI2_3_IRQn; vector = (uint32_t)&gpio_irq1; irq_index = 1; - } - else if ((pin_index > 3) && (pin_index < 16)) { + } else if ((pin_index > 3) && (pin_index < 16)) { irq_n = EXTI4_15_IRQn; vector = (uint32_t)&gpio_irq2; irq_index = 2; - } - else { + } else { error("InterruptIn error: pin not supported.\n"); return -1; } @@ -112,25 +113,25 @@ // Enable SYSCFG clock RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); - + // Connect EXTI line to pin SYSCFG_EXTILineConfig(port_index, pin_index); // Configure EXTI line - EXTI_InitTypeDef EXTI_InitStructure; + EXTI_InitTypeDef EXTI_InitStructure; EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index); EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); - + // Enable and set EXTI interrupt to the lowest priority NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = irq_n; NVIC_InitStructure.NVIC_IRQChannelPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); - + NVIC_SetVector(irq_n, vector); NVIC_EnableIRQ(irq_n); @@ -141,9 +142,9 @@ channel_ids[irq_index] = id; channel_gpio[irq_index] = gpio_add; channel_pin[irq_index] = pin_index; - - irq_handler = handler; - + + irq_handler = handler; + return 0; } @@ -154,47 +155,44 @@ // Disable EXTI line EXTI_InitTypeDef EXTI_InitStructure; EXTI_StructInit(&EXTI_InitStructure); - EXTI_Init(&EXTI_InitStructure); + EXTI_Init(&EXTI_InitStructure); obj->event = EDGE_NONE; } void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) { EXTI_InitTypeDef EXTI_InitStructure; - + uint32_t pin_index = channel_pin[obj->irq_index]; EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index); EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; - + if (event == IRQ_RISE) { if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) { EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; obj->event = EDGE_BOTH; - } - else { // NONE or RISE + } else { // NONE or RISE EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; obj->event = EDGE_RISE; } } - + if (event == IRQ_FALL) { if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) { EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; obj->event = EDGE_BOTH; - } - else { // NONE or FALL + } else { // NONE or FALL EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; obj->event = EDGE_FALL; } } - + if (enable) { EXTI_InitStructure.EXTI_LineCmd = ENABLE; - } - else { + } else { EXTI_InitStructure.EXTI_LineCmd = DISABLE; } - + EXTI_Init(&EXTI_InitStructure); }