tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/gpio_irq_api.c

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   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
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16 #include <stddef.h>
  17 #include "cmsis.h"
  18
  19 #include "gpio_irq_api.h"
  20
  21 #if DEVICE_INTERRUPTIN
  22
  23 #include "gpio_api.h"
  24 #include "fsl_gpio_hal.h"
  25 #include "fsl_port_hal.h"
  26 #include "mbed_error.h"
  27
  28 #define CHANNEL_NUM    160
  29
  30 static uint32_t channel_ids[CHANNEL_NUM] = {0};
  31 static gpio_irq_handler irq_handler;
  32
  33 #define IRQ_DISABLED        (0)
  34 #define IRQ_RAISING_EDGE    (9)
  35 #define IRQ_FALLING_EDGE    (10)
  36 #define IRQ_EITHER_EDGE     (11)
  37
  38 static void handle_interrupt_in(PortName port, int ch_base) {
  39     uint32_t i;
  40     uint32_t port_addrs[] = PORT_BASE_ADDRS;
  41
  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];
  45             if (id == 0) {
  46                 continue;
  47             }
  48
  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:
  53                     event = IRQ_RISE;
  54                     break;
  55
  56                 case IRQ_FALLING_EDGE:
  57                     event = IRQ_FALL;
  58                     break;
  59
  60                 case IRQ_EITHER_EDGE:
  61                     event = (GPIO_HAL_ReadPinInput(gpio_addrs[port], i)) ? (IRQ_RISE) : (IRQ_FALL);
  62                     break;
  63             }
  64             if (event != IRQ_NONE) {
  65                 irq_handler(id, event);
  66             }
  67         }
  68     }
  69     PORT_HAL_ClearPortIntFlag(port_addrs[port]);
  70 }
  71
  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);}
  77
  78 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
  79     if (pin == NC) {
  80         return -1;
  81    }
  82
  83     irq_handler = handler;
  84     obj->port = pin >> GPIO_PORT_SHIFT;
  85     obj->pin = pin & 0x7F;
  86
  87     uint32_t ch_base = 0;
  88     uint32_t vector = (uint32_t)gpio_irqA;
  89     IRQn_Type irq_n = PORTA_IRQn;
  90     switch (obj->port) {
  91         case PortA:
  92             ch_base = 0;
  93             irq_n = PORTA_IRQn;
  94             vector = (uint32_t)gpio_irqA;
  95             break;
  96         case PortB:
  97             ch_base = 32;
  98             irq_n = PORTB_IRQn;
  99             vector = (uint32_t)gpio_irqB;
 100             break;
 101         case PortC:
 102             ch_base = 64;
 103             irq_n = PORTC_IRQn;
 104             vector = (uint32_t)gpio_irqC;
 105             break;
 106         case PortD:
 107             ch_base = 96;
 108             irq_n = PORTD_IRQn;
 109             vector = (uint32_t)gpio_irqD;
 110             break;
 111         case PortE:
 112             ch_base = 128;
 113             irq_n = PORTE_IRQn;
 114             vector = (uint32_t)gpio_irqE;
 115             break;
 116
 117         default:
 118             error("gpio_irq only supported on port A-E.");
 119             break;
 120     }
 121     NVIC_SetVector(irq_n, vector);
 122     NVIC_EnableIRQ(irq_n);
 123
 124     obj->ch = ch_base + obj->pin;
 125     channel_ids[obj->ch] = id;
 126
 127     return 0;
 128 }
 129
 130 void gpio_irq_free(gpio_irq_t *obj) {
 131     channel_ids[obj->ch] = 0;
 132 }
 133
 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;
 137
 138     switch (BR_PORT_PCRn_IRQC(port_addrs[obj->port], obj->pin)) {
 139         case IRQ_DISABLED:
 140             if (enable)
 141                 irq_settings = (event == IRQ_RISE) ? (kPortIntRisingEdge) : (kPortIntFallingEdge);
 142             break;
 143
 144         case IRQ_RAISING_EDGE:
 145             if (enable) {
 146                 irq_settings = (event == IRQ_RISE) ? (kPortIntRisingEdge) : (kPortIntEitherEdge);
 147             } else {
 148                 if (event == IRQ_FALL)
 149                     irq_settings = kPortIntRisingEdge;
 150             }
 151             break;
 152
 153         case IRQ_FALLING_EDGE:
 154             if (enable) {
 155                 irq_settings = (event == IRQ_FALL) ? (kPortIntFallingEdge) : (kPortIntEitherEdge);
 156             } else {
 157                 if (event == IRQ_RISE)
 158                     irq_settings = kPortIntFallingEdge;
 159             }
 160             break;
 161
 162         case IRQ_EITHER_EDGE:
 163             if (enable) {
 164                 irq_settings = kPortIntEitherEdge;
 165             } else {
 166                 irq_settings = (event == IRQ_RISE) ? (kPortIntFallingEdge) : (kPortIntRisingEdge);
 167             }
 168             break;
 169     }
 170
 171     PORT_HAL_SetPinIntMode(port_addrs[obj->port], obj->pin, irq_settings);
 172     PORT_HAL_ClearPinIntFlag(port_addrs[obj->port], obj->pin);
 173 }
 174
 175 void gpio_irq_enable(gpio_irq_t *obj) {
 176     switch (obj->port) {
 177         case PortA:
 178             NVIC_EnableIRQ(PORTA_IRQn);
 179             break;
 180         case PortB:
 181             NVIC_EnableIRQ(PORTB_IRQn);
 182             break;
 183         case PortC:
 184             NVIC_EnableIRQ(PORTC_IRQn);
 185             break;
 186         case PortD:
 187             NVIC_EnableIRQ(PORTD_IRQn);
 188             break;
 189         case PortE:
 190             NVIC_EnableIRQ(PORTE_IRQn);
 191             break;
 192     }
 193 }
 194
 195 void gpio_irq_disable(gpio_irq_t *obj) {
 196     switch (obj->port) {
 197         case PortA:
 198             NVIC_DisableIRQ(PORTA_IRQn);
 199             break;
 200         case PortB:
 201             NVIC_DisableIRQ(PORTB_IRQn);
 202             break;
 203         case PortC:
 204             NVIC_DisableIRQ(PORTC_IRQn);
 205             break;
 206         case PortD:
 207             NVIC_DisableIRQ(PORTD_IRQn);
 208             break;
 209         case PortE:
 210             NVIC_DisableIRQ(PORTE_IRQn);
 211             break;
 212     }
 213 }
 214
 215 #endif