mbed library sources
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Diff: targets/hal/TARGET_Freescale/TARGET_K20D5M/gpio_irq_api.c
- Revision:
- 255:20b371a9491b
- Parent:
- 254:181b5e179739
- Child:
- 256:76fd9a263045
--- a/targets/hal/TARGET_Freescale/TARGET_K20D5M/gpio_irq_api.c Thu Jul 10 09:00:09 2014 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,207 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2013 ARM Limited - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#include <stddef.h> -#include "cmsis.h" - -#include "gpio_irq_api.h" -#include "error.h" - -#define CHANNEL_NUM 160 - -static uint32_t channel_ids[CHANNEL_NUM] = {0}; -static gpio_irq_handler irq_handler; - -#define IRQ_DISABLED (0) -#define IRQ_RAISING_EDGE PORT_PCR_IRQC(9) -#define IRQ_FALLING_EDGE PORT_PCR_IRQC(10) -#define IRQ_EITHER_EDGE PORT_PCR_IRQC(11) - -static void handle_interrupt_in(PORT_Type *port, int ch_base) { - uint32_t mask = 0, i; - - for (i = 0; i < 32; i++) { - uint32_t pmask = (1 << i); - if (port->ISFR & pmask) { - mask |= pmask; - uint32_t id = channel_ids[ch_base + i]; - if (id == 0) - continue; - - GPIO_Type *gpio = PTA; - gpio_irq_event event = IRQ_NONE; - uint32_t port_num = (port - PORTA) >> 12; - switch (port->PCR[i] & PORT_PCR_IRQC_MASK) { - case IRQ_RAISING_EDGE: - event = IRQ_RISE; - break; - - case IRQ_FALLING_EDGE: - event = IRQ_FALL; - break; - - case IRQ_EITHER_EDGE: - gpio += (port_num * 0x40); - event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL); - break; - } - if (event != IRQ_NONE) - irq_handler(id, event); - } - } - port->ISFR = mask; -} - -void gpio_irqA(void) {handle_interrupt_in(PORTA, 0);} -void gpio_irqB(void) {handle_interrupt_in(PORTB, 32);} -void gpio_irqC(void) {handle_interrupt_in(PORTC, 64);} -void gpio_irqD(void) {handle_interrupt_in(PORTD, 96);} -void gpio_irqE(void) {handle_interrupt_in(PORTE, 128);} - -int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { - if (pin == NC) - return -1; - - irq_handler = handler; - - obj->port = pin >> PORT_SHIFT; - obj->pin = (pin & 0x7F) >> 2; - - uint32_t ch_base, vector; - IRQn_Type irq_n; - switch (obj->port) { - case PortA: - ch_base = 0; - irq_n = PORTA_IRQn; - vector = (uint32_t)gpio_irqA; - break; - case PortB: - ch_base = 32; - irq_n = PORTB_IRQn; - vector = (uint32_t)gpio_irqB; - break; - case PortC: - ch_base = 64; - irq_n = PORTC_IRQn; - vector = (uint32_t)gpio_irqC; - break; - case PortD: - ch_base = 96; - irq_n = PORTD_IRQn; vector = (uint32_t)gpio_irqD; - break; - case PortE: - ch_base = 128; - irq_n = PORTE_IRQn; - vector = (uint32_t)gpio_irqE; - break; - - default: - error("gpio_irq only supported on port A-E."); - break; - } - NVIC_SetVector(irq_n, vector); - NVIC_EnableIRQ(irq_n); - - obj->ch = ch_base + obj->pin; - channel_ids[obj->ch] = id; - - return 0; -} - -void gpio_irq_free(gpio_irq_t *obj) { - channel_ids[obj->ch] = 0; -} - -void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) { - PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port); - - uint32_t irq_settings = IRQ_DISABLED; - - switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) { - case IRQ_DISABLED: - if (enable) - irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE); - break; - - case IRQ_RAISING_EDGE: - if (enable) { - irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE); - } else { - if (event == IRQ_FALL) - irq_settings = IRQ_RAISING_EDGE; - } - break; - - case IRQ_FALLING_EDGE: - if (enable) { - irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE); - } else { - if (event == IRQ_RISE) - irq_settings = IRQ_FALLING_EDGE; - } - break; - - case IRQ_EITHER_EDGE: - if (enable) { - irq_settings = IRQ_EITHER_EDGE; - } else { - irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE); - } - break; - } - - // Interrupt configuration and clear interrupt - port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK; -} - -void gpio_irq_enable(gpio_irq_t *obj) { - switch (obj->port) { - case PortA: - NVIC_EnableIRQ(PORTA_IRQn); - break; - case PortB: - NVIC_EnableIRQ(PORTB_IRQn); - break; - case PortC: - NVIC_EnableIRQ(PORTC_IRQn); - break; - case PortD: - NVIC_EnableIRQ(PORTD_IRQn); - break; - case PortE: - NVIC_EnableIRQ(PORTE_IRQn); - break; - } -} - -void gpio_irq_disable(gpio_irq_t *obj) { - switch (obj->port) { - case PortA: - NVIC_DisableIRQ(PORTA_IRQn); - break; - case PortB: - NVIC_DisableIRQ(PORTB_IRQn); - break; - case PortC: - NVIC_DisableIRQ(PORTC_IRQn); - break; - case PortD: - NVIC_DisableIRQ(PORTD_IRQn); - break; - case PortE: - NVIC_DisableIRQ(PORTE_IRQn); - break; - } -}