mbed library sources
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targets/hal/TARGET_Freescale/TARGET_KLXX/TARGET_KL25Z/gpio_irq_api.c@86:26fc69fd3b6c, 2014-02-08 (annotated)
- Committer:
- mbed_official
- Date:
- Sat Feb 08 12:00:07 2014 +0000
- Revision:
- 86:26fc69fd3b6c
- Parent:
- 82:0b31dbcd4769
- Child:
- 113:65a335a675de
Synchronized with git revision 8c4fcca8c8e600391a5ccb90a3f889019733d082
Full URL: https://github.com/mbedmicro/mbed/commit/8c4fcca8c8e600391a5ccb90a3f889019733d082/
PWM update for Freescale Targets
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 10:3bc89ef62ce7 | 1 | /* mbed Microcontroller Library |
emilmont | 10:3bc89ef62ce7 | 2 | * Copyright (c) 2006-2013 ARM Limited |
emilmont | 10:3bc89ef62ce7 | 3 | * |
emilmont | 10:3bc89ef62ce7 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
emilmont | 10:3bc89ef62ce7 | 5 | * you may not use this file except in compliance with the License. |
emilmont | 10:3bc89ef62ce7 | 6 | * You may obtain a copy of the License at |
emilmont | 10:3bc89ef62ce7 | 7 | * |
emilmont | 10:3bc89ef62ce7 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
emilmont | 10:3bc89ef62ce7 | 9 | * |
emilmont | 10:3bc89ef62ce7 | 10 | * Unless required by applicable law or agreed to in writing, software |
emilmont | 10:3bc89ef62ce7 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
emilmont | 10:3bc89ef62ce7 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
emilmont | 10:3bc89ef62ce7 | 13 | * See the License for the specific language governing permissions and |
emilmont | 10:3bc89ef62ce7 | 14 | * limitations under the License. |
emilmont | 10:3bc89ef62ce7 | 15 | */ |
emilmont | 10:3bc89ef62ce7 | 16 | #include <stddef.h> |
emilmont | 10:3bc89ef62ce7 | 17 | #include "cmsis.h" |
emilmont | 10:3bc89ef62ce7 | 18 | |
emilmont | 10:3bc89ef62ce7 | 19 | #include "gpio_irq_api.h" |
emilmont | 10:3bc89ef62ce7 | 20 | #include "error.h" |
emilmont | 10:3bc89ef62ce7 | 21 | |
emilmont | 10:3bc89ef62ce7 | 22 | #define CHANNEL_NUM 64 |
emilmont | 10:3bc89ef62ce7 | 23 | |
emilmont | 10:3bc89ef62ce7 | 24 | static uint32_t channel_ids[CHANNEL_NUM] = {0}; |
emilmont | 10:3bc89ef62ce7 | 25 | static gpio_irq_handler irq_handler; |
emilmont | 10:3bc89ef62ce7 | 26 | |
emilmont | 10:3bc89ef62ce7 | 27 | #define IRQ_DISABLED (0) |
emilmont | 10:3bc89ef62ce7 | 28 | #define IRQ_RAISING_EDGE PORT_PCR_IRQC(9) |
emilmont | 10:3bc89ef62ce7 | 29 | #define IRQ_FALLING_EDGE PORT_PCR_IRQC(10) |
emilmont | 10:3bc89ef62ce7 | 30 | #define IRQ_EITHER_EDGE PORT_PCR_IRQC(11) |
emilmont | 10:3bc89ef62ce7 | 31 | |
emilmont | 10:3bc89ef62ce7 | 32 | static void handle_interrupt_in(PORT_Type *port, int ch_base) { |
emilmont | 10:3bc89ef62ce7 | 33 | uint32_t mask = 0, i; |
emilmont | 10:3bc89ef62ce7 | 34 | |
emilmont | 10:3bc89ef62ce7 | 35 | for (i = 0; i < 32; i++) { |
emilmont | 10:3bc89ef62ce7 | 36 | uint32_t pmask = (1 << i); |
emilmont | 10:3bc89ef62ce7 | 37 | if (port->ISFR & pmask) { |
emilmont | 10:3bc89ef62ce7 | 38 | mask |= pmask; |
emilmont | 10:3bc89ef62ce7 | 39 | uint32_t id = channel_ids[ch_base + i]; |
mbed_official | 86:26fc69fd3b6c | 40 | if (id == 0) { |
mbed_official | 86:26fc69fd3b6c | 41 | continue; |
mbed_official | 86:26fc69fd3b6c | 42 | } |
emilmont | 10:3bc89ef62ce7 | 43 | |
emilmont | 10:3bc89ef62ce7 | 44 | FGPIO_Type *gpio; |
emilmont | 10:3bc89ef62ce7 | 45 | gpio_irq_event event = IRQ_NONE; |
emilmont | 10:3bc89ef62ce7 | 46 | switch (port->PCR[i] & PORT_PCR_IRQC_MASK) { |
emilmont | 10:3bc89ef62ce7 | 47 | case IRQ_RAISING_EDGE: |
emilmont | 10:3bc89ef62ce7 | 48 | event = IRQ_RISE; |
emilmont | 10:3bc89ef62ce7 | 49 | break; |
emilmont | 10:3bc89ef62ce7 | 50 | |
emilmont | 10:3bc89ef62ce7 | 51 | case IRQ_FALLING_EDGE: |
emilmont | 10:3bc89ef62ce7 | 52 | event = IRQ_FALL; |
emilmont | 10:3bc89ef62ce7 | 53 | break; |
emilmont | 10:3bc89ef62ce7 | 54 | |
emilmont | 10:3bc89ef62ce7 | 55 | case IRQ_EITHER_EDGE: |
emilmont | 10:3bc89ef62ce7 | 56 | gpio = (port == PORTA) ? (FPTA) : (FPTD); |
emilmont | 10:3bc89ef62ce7 | 57 | event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL); |
emilmont | 10:3bc89ef62ce7 | 58 | break; |
emilmont | 10:3bc89ef62ce7 | 59 | } |
mbed_official | 86:26fc69fd3b6c | 60 | if (event != IRQ_NONE) { |
emilmont | 10:3bc89ef62ce7 | 61 | irq_handler(id, event); |
mbed_official | 86:26fc69fd3b6c | 62 | } |
emilmont | 10:3bc89ef62ce7 | 63 | } |
emilmont | 10:3bc89ef62ce7 | 64 | } |
emilmont | 10:3bc89ef62ce7 | 65 | port->ISFR = mask; |
emilmont | 10:3bc89ef62ce7 | 66 | } |
emilmont | 10:3bc89ef62ce7 | 67 | |
emilmont | 10:3bc89ef62ce7 | 68 | void gpio_irqA(void) {handle_interrupt_in(PORTA, 0);} |
emilmont | 10:3bc89ef62ce7 | 69 | void gpio_irqD(void) {handle_interrupt_in(PORTD, 32);} |
emilmont | 10:3bc89ef62ce7 | 70 | |
emilmont | 10:3bc89ef62ce7 | 71 | int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { |
emilmont | 10:3bc89ef62ce7 | 72 | if (pin == NC) return -1; |
emilmont | 10:3bc89ef62ce7 | 73 | |
emilmont | 10:3bc89ef62ce7 | 74 | irq_handler = handler; |
emilmont | 10:3bc89ef62ce7 | 75 | |
emilmont | 10:3bc89ef62ce7 | 76 | obj->port = pin >> PORT_SHIFT; |
emilmont | 10:3bc89ef62ce7 | 77 | obj->pin = (pin & 0x7F) >> 2; |
emilmont | 10:3bc89ef62ce7 | 78 | |
emilmont | 10:3bc89ef62ce7 | 79 | uint32_t ch_base, vector; |
emilmont | 10:3bc89ef62ce7 | 80 | IRQn_Type irq_n; |
emilmont | 10:3bc89ef62ce7 | 81 | switch (obj->port) { |
emilmont | 10:3bc89ef62ce7 | 82 | case PortA: |
emilmont | 10:3bc89ef62ce7 | 83 | ch_base = 0; irq_n = PORTA_IRQn; vector = (uint32_t)gpio_irqA; |
emilmont | 10:3bc89ef62ce7 | 84 | break; |
emilmont | 10:3bc89ef62ce7 | 85 | |
emilmont | 10:3bc89ef62ce7 | 86 | case PortD: |
emilmont | 10:3bc89ef62ce7 | 87 | ch_base = 32; irq_n = PORTD_IRQn; vector = (uint32_t)gpio_irqD; |
emilmont | 10:3bc89ef62ce7 | 88 | break; |
emilmont | 10:3bc89ef62ce7 | 89 | |
emilmont | 10:3bc89ef62ce7 | 90 | default: |
emilmont | 10:3bc89ef62ce7 | 91 | error("gpio_irq only supported on port A and D\n"); |
emilmont | 10:3bc89ef62ce7 | 92 | break; |
emilmont | 10:3bc89ef62ce7 | 93 | } |
emilmont | 10:3bc89ef62ce7 | 94 | NVIC_SetVector(irq_n, vector); |
emilmont | 10:3bc89ef62ce7 | 95 | NVIC_EnableIRQ(irq_n); |
emilmont | 10:3bc89ef62ce7 | 96 | |
emilmont | 10:3bc89ef62ce7 | 97 | obj->ch = ch_base + obj->pin; |
emilmont | 10:3bc89ef62ce7 | 98 | channel_ids[obj->ch] = id; |
emilmont | 10:3bc89ef62ce7 | 99 | |
emilmont | 10:3bc89ef62ce7 | 100 | return 0; |
emilmont | 10:3bc89ef62ce7 | 101 | } |
emilmont | 10:3bc89ef62ce7 | 102 | |
emilmont | 10:3bc89ef62ce7 | 103 | void gpio_irq_free(gpio_irq_t *obj) { |
emilmont | 10:3bc89ef62ce7 | 104 | channel_ids[obj->ch] = 0; |
emilmont | 10:3bc89ef62ce7 | 105 | } |
emilmont | 10:3bc89ef62ce7 | 106 | |
emilmont | 10:3bc89ef62ce7 | 107 | void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) { |
emilmont | 10:3bc89ef62ce7 | 108 | PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port); |
emilmont | 10:3bc89ef62ce7 | 109 | |
emilmont | 10:3bc89ef62ce7 | 110 | uint32_t irq_settings = IRQ_DISABLED; |
emilmont | 10:3bc89ef62ce7 | 111 | |
emilmont | 10:3bc89ef62ce7 | 112 | switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) { |
emilmont | 10:3bc89ef62ce7 | 113 | case IRQ_DISABLED: |
emilmont | 10:3bc89ef62ce7 | 114 | if (enable) { |
emilmont | 10:3bc89ef62ce7 | 115 | irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE); |
emilmont | 10:3bc89ef62ce7 | 116 | } |
emilmont | 10:3bc89ef62ce7 | 117 | break; |
emilmont | 10:3bc89ef62ce7 | 118 | |
emilmont | 10:3bc89ef62ce7 | 119 | case IRQ_RAISING_EDGE: |
emilmont | 10:3bc89ef62ce7 | 120 | if (enable) { |
emilmont | 10:3bc89ef62ce7 | 121 | irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE); |
emilmont | 10:3bc89ef62ce7 | 122 | } else { |
emilmont | 10:3bc89ef62ce7 | 123 | if (event == IRQ_FALL) |
emilmont | 10:3bc89ef62ce7 | 124 | irq_settings = IRQ_RAISING_EDGE; |
emilmont | 10:3bc89ef62ce7 | 125 | } |
emilmont | 10:3bc89ef62ce7 | 126 | break; |
emilmont | 10:3bc89ef62ce7 | 127 | |
emilmont | 10:3bc89ef62ce7 | 128 | case IRQ_FALLING_EDGE: |
emilmont | 10:3bc89ef62ce7 | 129 | if (enable) { |
emilmont | 10:3bc89ef62ce7 | 130 | irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE); |
emilmont | 10:3bc89ef62ce7 | 131 | } else { |
emilmont | 10:3bc89ef62ce7 | 132 | if (event == IRQ_RISE) |
emilmont | 10:3bc89ef62ce7 | 133 | irq_settings = IRQ_FALLING_EDGE; |
emilmont | 10:3bc89ef62ce7 | 134 | } |
emilmont | 10:3bc89ef62ce7 | 135 | break; |
emilmont | 10:3bc89ef62ce7 | 136 | |
emilmont | 10:3bc89ef62ce7 | 137 | case IRQ_EITHER_EDGE: |
emilmont | 10:3bc89ef62ce7 | 138 | if (enable) { |
emilmont | 10:3bc89ef62ce7 | 139 | irq_settings = IRQ_EITHER_EDGE; |
emilmont | 10:3bc89ef62ce7 | 140 | } else { |
emilmont | 10:3bc89ef62ce7 | 141 | irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE); |
emilmont | 10:3bc89ef62ce7 | 142 | } |
emilmont | 10:3bc89ef62ce7 | 143 | break; |
emilmont | 10:3bc89ef62ce7 | 144 | } |
emilmont | 10:3bc89ef62ce7 | 145 | |
emilmont | 10:3bc89ef62ce7 | 146 | // Interrupt configuration and clear interrupt |
emilmont | 10:3bc89ef62ce7 | 147 | port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK; |
emilmont | 10:3bc89ef62ce7 | 148 | } |
mbed_official | 35:371630885ad6 | 149 | |
mbed_official | 35:371630885ad6 | 150 | void gpio_irq_enable(gpio_irq_t *obj) { |
mbed_official | 35:371630885ad6 | 151 | if (obj->port == PortA) { |
mbed_official | 35:371630885ad6 | 152 | NVIC_EnableIRQ(PORTA_IRQn); |
mbed_official | 35:371630885ad6 | 153 | } else if (obj->port == PortD) { |
mbed_official | 35:371630885ad6 | 154 | NVIC_EnableIRQ(PORTD_IRQn); |
mbed_official | 35:371630885ad6 | 155 | } |
mbed_official | 35:371630885ad6 | 156 | } |
mbed_official | 35:371630885ad6 | 157 | |
mbed_official | 35:371630885ad6 | 158 | void gpio_irq_disable(gpio_irq_t *obj) { |
mbed_official | 35:371630885ad6 | 159 | if (obj->port == PortA) { |
mbed_official | 35:371630885ad6 | 160 | NVIC_DisableIRQ(PORTA_IRQn); |
mbed_official | 35:371630885ad6 | 161 | } else if (obj->port == PortD) { |
mbed_official | 35:371630885ad6 | 162 | NVIC_DisableIRQ(PORTD_IRQn); |
mbed_official | 35:371630885ad6 | 163 | } |
mbed_official | 35:371630885ad6 | 164 | } |
mbed_official | 86:26fc69fd3b6c | 165 | |
mbed_official | 86:26fc69fd3b6c | 166 | // Change the NMI pin to an input. This allows NMI pin to |
mbed_official | 86:26fc69fd3b6c | 167 | // be used as a low power mode wakeup. The application will |
mbed_official | 86:26fc69fd3b6c | 168 | // need to change the pin back to NMI_b or wakeup only occurs once! |
mbed_official | 86:26fc69fd3b6c | 169 | extern void gpio_init(gpio_t *obj, PinName pin, PinDirection direction); |
mbed_official | 86:26fc69fd3b6c | 170 | void NMI_Handler(void) |
mbed_official | 86:26fc69fd3b6c | 171 | { |
mbed_official | 86:26fc69fd3b6c | 172 | gpio_t gpio; |
mbed_official | 86:26fc69fd3b6c | 173 | gpio_init(&gpio, PTA4, PIN_INPUT); |
mbed_official | 86:26fc69fd3b6c | 174 | } |