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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Freescale/TARGET_KL46Z/gpio_irq_api.c@69:49e45cb70de1, 2013-12-31 (annotated)

Committer:
mbed_official
Date:
Tue Dec 31 15:30:05 2013 +0000
Revision:
69:49e45cb70de1
Parent:
35:371630885ad6 
Synchronized with git revision b311c56b44e2f3d58c5a425453fba9dfaa0b13e3



Full URL: https://github.com/mbedmicro/mbed/commit/b311c56b44e2f3d58c5a425453fba9dfaa0b13e3/



[LPC812] Add SPISlave function

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 31:42176bc3c368 1 /* mbed Microcontroller Library
mbed_official 31:42176bc3c368 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 31:42176bc3c368 3 *
mbed_official 31:42176bc3c368 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 31:42176bc3c368 5 * you may not use this file except in compliance with the License.
mbed_official 31:42176bc3c368 6 * You may obtain a copy of the License at
mbed_official 31:42176bc3c368 7 *
mbed_official 31:42176bc3c368 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 31:42176bc3c368 9 *
mbed_official 31:42176bc3c368 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 31:42176bc3c368 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 31:42176bc3c368 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 31:42176bc3c368 13 * See the License for the specific language governing permissions and
mbed_official 31:42176bc3c368 14 * limitations under the License.
mbed_official 31:42176bc3c368 15 */
mbed_official 31:42176bc3c368 16 #include <stddef.h>
mbed_official 31:42176bc3c368 17 #include "cmsis.h"
mbed_official 31:42176bc3c368 18
mbed_official 31:42176bc3c368 19 #include "gpio_irq_api.h"
mbed_official 31:42176bc3c368 20 #include "error.h"
mbed_official 31:42176bc3c368 21
mbed_official 69:49e45cb70de1 22 #define CHANNEL_NUM 96
mbed_official 31:42176bc3c368 23
mbed_official 31:42176bc3c368 24 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 31:42176bc3c368 25 static gpio_irq_handler irq_handler;
mbed_official 31:42176bc3c368 26
mbed_official 31:42176bc3c368 27 #define IRQ_DISABLED (0)
mbed_official 31:42176bc3c368 28 #define IRQ_RAISING_EDGE PORT_PCR_IRQC(9)
mbed_official 31:42176bc3c368 29 #define IRQ_FALLING_EDGE PORT_PCR_IRQC(10)
mbed_official 31:42176bc3c368 30 #define IRQ_EITHER_EDGE PORT_PCR_IRQC(11)
mbed_official 31:42176bc3c368 31
mbed_official 31:42176bc3c368 32 static void handle_interrupt_in(PORT_Type *port, int ch_base) {
mbed_official 31:42176bc3c368 33 uint32_t mask = 0, i;
mbed_official 31:42176bc3c368 34
mbed_official 31:42176bc3c368 35 for (i = 0; i < 32; i++) {
mbed_official 31:42176bc3c368 36 uint32_t pmask = (1 << i);
mbed_official 31:42176bc3c368 37 if (port->ISFR & pmask) {
mbed_official 31:42176bc3c368 38 mask |= pmask;
mbed_official 31:42176bc3c368 39 uint32_t id = channel_ids[ch_base + i];
mbed_official 69:49e45cb70de1 40 if (id == 0)
mbed_official 69:49e45cb70de1 41 continue;
mbed_official 31:42176bc3c368 42
mbed_official 31:42176bc3c368 43 FGPIO_Type *gpio;
mbed_official 31:42176bc3c368 44 gpio_irq_event event = IRQ_NONE;
mbed_official 31:42176bc3c368 45 switch (port->PCR[i] & PORT_PCR_IRQC_MASK) {
mbed_official 31:42176bc3c368 46 case IRQ_RAISING_EDGE:
mbed_official 31:42176bc3c368 47 event = IRQ_RISE;
mbed_official 31:42176bc3c368 48 break;
mbed_official 31:42176bc3c368 49
mbed_official 31:42176bc3c368 50 case IRQ_FALLING_EDGE:
mbed_official 31:42176bc3c368 51 event = IRQ_FALL;
mbed_official 31:42176bc3c368 52 break;
mbed_official 31:42176bc3c368 53
mbed_official 31:42176bc3c368 54 case IRQ_EITHER_EDGE:
mbed_official 69:49e45cb70de1 55 if (port == PORTA) {
mbed_official 69:49e45cb70de1 56 gpio = FPTA;
mbed_official 69:49e45cb70de1 57 } else if (port == PORTC) {
mbed_official 69:49e45cb70de1 58 gpio = FPTC;
mbed_official 69:49e45cb70de1 59 } else {
mbed_official 69:49e45cb70de1 60 gpio = FPTD;
mbed_official 69:49e45cb70de1 61 }
mbed_official 31:42176bc3c368 62 event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 31:42176bc3c368 63 break;
mbed_official 31:42176bc3c368 64 }
mbed_official 31:42176bc3c368 65 if (event != IRQ_NONE)
mbed_official 31:42176bc3c368 66 irq_handler(id, event);
mbed_official 31:42176bc3c368 67 }
mbed_official 31:42176bc3c368 68 }
mbed_official 31:42176bc3c368 69 port->ISFR = mask;
mbed_official 31:42176bc3c368 70 }
mbed_official 31:42176bc3c368 71
mbed_official 69:49e45cb70de1 72 void gpio_irqA(void) {
mbed_official 69:49e45cb70de1 73 handle_interrupt_in(PORTA, 0);
mbed_official 69:49e45cb70de1 74 }
mbed_official 69:49e45cb70de1 75
mbed_official 69:49e45cb70de1 76 /* PORTC and PORTD share same vector */
mbed_official 69:49e45cb70de1 77 void gpio_irqCD(void) {
mbed_official 69:49e45cb70de1 78 if ((SIM->SCGC5 & SIM_SCGC5_PORTC_MASK) && (PORTC->ISFR)) {
mbed_official 69:49e45cb70de1 79 handle_interrupt_in(PORTC, 32);
mbed_official 69:49e45cb70de1 80 } else if ((SIM->SCGC5 & SIM_SCGC5_PORTD_MASK) && (PORTD->ISFR)) {
mbed_official 69:49e45cb70de1 81 handle_interrupt_in(PORTD, 64);
mbed_official 69:49e45cb70de1 82 }
mbed_official 69:49e45cb70de1 83 }
mbed_official 31:42176bc3c368 84
mbed_official 31:42176bc3c368 85 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 69:49e45cb70de1 86 if (pin == NC)
mbed_official 69:49e45cb70de1 87 return -1;
mbed_official 31:42176bc3c368 88
mbed_official 31:42176bc3c368 89 irq_handler = handler;
mbed_official 31:42176bc3c368 90
mbed_official 31:42176bc3c368 91 obj->port = pin >> PORT_SHIFT;
mbed_official 31:42176bc3c368 92 obj->pin = (pin & 0x7F) >> 2;
mbed_official 31:42176bc3c368 93
mbed_official 31:42176bc3c368 94 uint32_t ch_base, vector;
mbed_official 31:42176bc3c368 95 IRQn_Type irq_n;
mbed_official 31:42176bc3c368 96 switch (obj->port) {
mbed_official 31:42176bc3c368 97 case PortA:
mbed_official 31:42176bc3c368 98 ch_base = 0; irq_n = PORTA_IRQn; vector = (uint32_t)gpio_irqA;
mbed_official 31:42176bc3c368 99 break;
mbed_official 31:42176bc3c368 100
mbed_official 69:49e45cb70de1 101 case PortC:
mbed_official 69:49e45cb70de1 102 ch_base = 32; irq_n = PORTC_PORTD_IRQn; vector = (uint32_t)gpio_irqCD;
mbed_official 69:49e45cb70de1 103 break;
mbed_official 69:49e45cb70de1 104
mbed_official 31:42176bc3c368 105 case PortD:
mbed_official 69:49e45cb70de1 106 ch_base = 64; irq_n = PORTC_PORTD_IRQn; vector = (uint32_t)gpio_irqCD;
mbed_official 31:42176bc3c368 107 break;
mbed_official 31:42176bc3c368 108
mbed_official 31:42176bc3c368 109 default:
mbed_official 69:49e45cb70de1 110 error("gpio_irq only supported on port A,C and D\n");
mbed_official 31:42176bc3c368 111 break;
mbed_official 31:42176bc3c368 112 }
mbed_official 31:42176bc3c368 113 NVIC_SetVector(irq_n, vector);
mbed_official 31:42176bc3c368 114 NVIC_EnableIRQ(irq_n);
mbed_official 31:42176bc3c368 115
mbed_official 31:42176bc3c368 116 obj->ch = ch_base + obj->pin;
mbed_official 31:42176bc3c368 117 channel_ids[obj->ch] = id;
mbed_official 31:42176bc3c368 118
mbed_official 31:42176bc3c368 119 return 0;
mbed_official 31:42176bc3c368 120 }
mbed_official 31:42176bc3c368 121
mbed_official 31:42176bc3c368 122 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 31:42176bc3c368 123 channel_ids[obj->ch] = 0;
mbed_official 31:42176bc3c368 124 }
mbed_official 31:42176bc3c368 125
mbed_official 31:42176bc3c368 126 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 31:42176bc3c368 127 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 31:42176bc3c368 128
mbed_official 31:42176bc3c368 129 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 31:42176bc3c368 130
mbed_official 31:42176bc3c368 131 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 31:42176bc3c368 132 case IRQ_DISABLED:
mbed_official 31:42176bc3c368 133 if (enable) {
mbed_official 31:42176bc3c368 134 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 31:42176bc3c368 135 }
mbed_official 31:42176bc3c368 136 break;
mbed_official 31:42176bc3c368 137
mbed_official 31:42176bc3c368 138 case IRQ_RAISING_EDGE:
mbed_official 31:42176bc3c368 139 if (enable) {
mbed_official 31:42176bc3c368 140 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 31:42176bc3c368 141 } else {
mbed_official 31:42176bc3c368 142 if (event == IRQ_FALL)
mbed_official 31:42176bc3c368 143 irq_settings = IRQ_RAISING_EDGE;
mbed_official 31:42176bc3c368 144 }
mbed_official 31:42176bc3c368 145 break;
mbed_official 31:42176bc3c368 146
mbed_official 31:42176bc3c368 147 case IRQ_FALLING_EDGE:
mbed_official 31:42176bc3c368 148 if (enable) {
mbed_official 31:42176bc3c368 149 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 31:42176bc3c368 150 } else {
mbed_official 31:42176bc3c368 151 if (event == IRQ_RISE)
mbed_official 31:42176bc3c368 152 irq_settings = IRQ_FALLING_EDGE;
mbed_official 31:42176bc3c368 153 }
mbed_official 31:42176bc3c368 154 break;
mbed_official 31:42176bc3c368 155
mbed_official 31:42176bc3c368 156 case IRQ_EITHER_EDGE:
mbed_official 31:42176bc3c368 157 if (enable) {
mbed_official 31:42176bc3c368 158 irq_settings = IRQ_EITHER_EDGE;
mbed_official 31:42176bc3c368 159 } else {
mbed_official 31:42176bc3c368 160 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 31:42176bc3c368 161 }
mbed_official 31:42176bc3c368 162 break;
mbed_official 31:42176bc3c368 163 }
mbed_official 31:42176bc3c368 164
mbed_official 31:42176bc3c368 165 // Interrupt configuration and clear interrupt
mbed_official 31:42176bc3c368 166 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 31:42176bc3c368 167 }
mbed_official 35:371630885ad6 168
mbed_official 35:371630885ad6 169 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 35:371630885ad6 170 if (obj->port == PortA) {
mbed_official 35:371630885ad6 171 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 69:49e45cb70de1 172 } else {
mbed_official 69:49e45cb70de1 173 NVIC_EnableIRQ(PORTC_PORTD_IRQn);
mbed_official 35:371630885ad6 174 }
mbed_official 35:371630885ad6 175 }
mbed_official 35:371630885ad6 176
mbed_official 35:371630885ad6 177 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 35:371630885ad6 178 if (obj->port == PortA) {
mbed_official 35:371630885ad6 179 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 69:49e45cb70de1 180 } else {
mbed_official 69:49e45cb70de1 181 NVIC_DisableIRQ(PORTC_PORTD_IRQn);
mbed_official 35:371630885ad6 182 }
mbed_official 35:371630885ad6 183 }