1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include "gpio_irq_api.h"
21 #if DEVICE_INTERRUPTIN
24 #include "fsl_gpio_hal.h"
25 #include "fsl_port_hal.h"
26 #include "mbed_error.h"
28 #define CHANNEL_NUM 160
30 static uint32_t channel_ids[CHANNEL_NUM] = {0};
31 static gpio_irq_handler irq_handler;
33 #define IRQ_DISABLED (0)
34 #define IRQ_RAISING_EDGE (9)
35 #define IRQ_FALLING_EDGE (10)
36 #define IRQ_EITHER_EDGE (11)
38 static void handle_interrupt_in(PortName port, int ch_base) {
40 uint32_t port_addrs[] = PORT_BASE_ADDRS;
42 for (i = 0; i < 32; i++) {
43 if (PORT_HAL_IsPinIntPending(port_addrs[port], i)) {
44 uint32_t id = channel_ids[ch_base + i];
49 gpio_irq_event event = IRQ_NONE;
50 uint32_t gpio_addrs[] = GPIO_BASE_ADDRS;
51 switch (BR_PORT_PCRn_IRQC(port_addrs[port], i)) {
52 case IRQ_RAISING_EDGE:
56 case IRQ_FALLING_EDGE:
61 event = (GPIO_HAL_ReadPinInput(gpio_addrs[port], i)) ? (IRQ_RISE) : (IRQ_FALL);
64 if (event != IRQ_NONE) {
65 irq_handler(id, event);
69 PORT_HAL_ClearPortIntFlag(port_addrs[port]);
72 void gpio_irqA(void) {handle_interrupt_in(PortA, 0);}
73 void gpio_irqB(void) {handle_interrupt_in(PortB, 32);}
74 void gpio_irqC(void) {handle_interrupt_in(PortC, 64);}
75 void gpio_irqD(void) {handle_interrupt_in(PortD, 96);}
76 void gpio_irqE(void) {handle_interrupt_in(PortE, 128);}
78 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
83 irq_handler = handler;
84 obj->port = pin >> GPIO_PORT_SHIFT;
85 obj->pin = pin & 0x7F;
88 uint32_t vector = (uint32_t)gpio_irqA;
89 IRQn_Type irq_n = PORTA_IRQn;
94 vector = (uint32_t)gpio_irqA;
99 vector = (uint32_t)gpio_irqB;
104 vector = (uint32_t)gpio_irqC;
109 vector = (uint32_t)gpio_irqD;
114 vector = (uint32_t)gpio_irqE;
118 error("gpio_irq only supported on port A-E.");
121 NVIC_SetVector(irq_n, vector);
122 NVIC_EnableIRQ(irq_n);
124 obj->ch = ch_base + obj->pin;
125 channel_ids[obj->ch] = id;
130 void gpio_irq_free(gpio_irq_t *obj) {
131 channel_ids[obj->ch] = 0;
134 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
135 uint32_t port_addrs[] = PORT_BASE_ADDRS;
136 port_interrupt_config_t irq_settings = kPortIntDisabled;
138 switch (BR_PORT_PCRn_IRQC(port_addrs[obj->port], obj->pin)) {
141 irq_settings = (event == IRQ_RISE) ? (kPortIntRisingEdge) : (kPortIntFallingEdge);
144 case IRQ_RAISING_EDGE:
146 irq_settings = (event == IRQ_RISE) ? (kPortIntRisingEdge) : (kPortIntEitherEdge);
148 if (event == IRQ_FALL)
149 irq_settings = kPortIntRisingEdge;
153 case IRQ_FALLING_EDGE:
155 irq_settings = (event == IRQ_FALL) ? (kPortIntFallingEdge) : (kPortIntEitherEdge);
157 if (event == IRQ_RISE)
158 irq_settings = kPortIntFallingEdge;
162 case IRQ_EITHER_EDGE:
164 irq_settings = kPortIntEitherEdge;
166 irq_settings = (event == IRQ_RISE) ? (kPortIntFallingEdge) : (kPortIntRisingEdge);
171 PORT_HAL_SetPinIntMode(port_addrs[obj->port], obj->pin, irq_settings);
172 PORT_HAL_ClearPinIntFlag(port_addrs[obj->port], obj->pin);
175 void gpio_irq_enable(gpio_irq_t *obj) {
178 NVIC_EnableIRQ(PORTA_IRQn);
181 NVIC_EnableIRQ(PORTB_IRQn);
184 NVIC_EnableIRQ(PORTC_IRQn);
187 NVIC_EnableIRQ(PORTD_IRQn);
190 NVIC_EnableIRQ(PORTE_IRQn);
195 void gpio_irq_disable(gpio_irq_t *obj) {
198 NVIC_DisableIRQ(PORTA_IRQn);
201 NVIC_DisableIRQ(PORTB_IRQn);
204 NVIC_DisableIRQ(PORTC_IRQn);
207 NVIC_DisableIRQ(PORTD_IRQn);
210 NVIC_DisableIRQ(PORTE_IRQn);