Diff: targets/hal/TARGET_NXP/TARGET_LPC11XX_11CXX/gpio_irq_api.c

Revision:

43:b3acfef78949

Parent:

42:7ca0bbba899b

--- a/targets/hal/TARGET_NXP/TARGET_LPC11XX_11CXX/gpio_irq_api.c	Sun Oct 27 16:30:04 2013 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,216 +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"
-#include "gpio_api.h"
-
-// The chip is capable of 42 GPIO interrupts.
-// PIO0_0..PIO0_11, PIO1_0..PIO1_11, PIO2_0..PIO2_11, PIO3_0..PIO3_5
-#define CHANNEL_NUM 42
-
-static uint32_t channel_ids[CHANNEL_NUM] = {0};
-static gpio_irq_handler irq_handler;
-
-static inline int numofbits(uint32_t bits)
-{
-    // Count number of bits
-    bits = (bits & 0x55555555) + (bits >> 1 & 0x55555555);
-    bits = (bits & 0x33333333) + (bits >> 2 & 0x33333333);
-    bits = (bits & 0x0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f);
-    bits = (bits & 0x00ff00ff) + (bits >> 8 & 0x00ff00ff);
-    return (bits & 0x0000ffff) + (bits >>16 & 0x0000ffff);
-}
-
-static inline void handle_interrupt_in(uint32_t port) {
-    // Find out whether the interrupt has been triggered by a high or low value...
-    // As the LPC1114 doesn't have a specific register for this, we'll just have to read
-    // the level of the pin as if it were just a normal input...
-    
-    uint32_t channel;
-    
-    // Get the number of the pin being used and the port typedef
-    LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (port * 0x10000)));
-    
-    // Get index of function table from Mask Interrupt Status register
-    channel = numofbits(port_reg->MIS - 1);
-    
-    if (port_reg->MIS & port_reg->IBE) {
-        // both edge, read the level of pin
-        if ((port_reg->DATA & port_reg->MIS) != 0)
-            irq_handler(channel_ids[channel], IRQ_RISE);
-        else
-            irq_handler(channel_ids[channel], IRQ_FALL);
-    }
-    else if (port_reg->MIS & port_reg->IEV) {
-        irq_handler(channel_ids[channel], IRQ_RISE);
-    }
-    else {
-        irq_handler(channel_ids[channel], IRQ_FALL);
-    }
-
-    // Clear the interrupt...
-    port_reg->IC = port_reg->MIS;
-}
-
-void gpio_irq0(void) {handle_interrupt_in(0);}
-void gpio_irq1(void) {handle_interrupt_in(1);}
-void gpio_irq2(void) {handle_interrupt_in(2);}
-void gpio_irq3(void) {handle_interrupt_in(3);}
-
-int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
-    int channel;
-    uint32_t port_num;
-    
-    if (pin == NC) return -1;
-    
-    // Firstly, we'll put some data in *obj so we can keep track of stuff.
-    obj->pin = pin;
-    
-    // Set the handler to be the pointer at the top...
-    irq_handler = handler;
-    
-    // Which port are we using?
-    port_num = ((pin & 0xF000) >> PORT_SHIFT);
-    
-    switch (port_num) {
-        case 0:
-            NVIC_SetVector(EINT0_IRQn, (uint32_t)gpio_irq0);
-            NVIC_EnableIRQ(EINT0_IRQn);
-            break;
-        case 1:
-            NVIC_SetVector(EINT1_IRQn, (uint32_t)gpio_irq1);
-            NVIC_EnableIRQ(EINT1_IRQn);
-            break;
-        case 2:
-            NVIC_SetVector(EINT2_IRQn, (uint32_t)gpio_irq2);
-            NVIC_EnableIRQ(EINT2_IRQn);
-            break;
-        case 3:
-            NVIC_SetVector(EINT3_IRQn, (uint32_t)gpio_irq3);
-            NVIC_EnableIRQ(EINT3_IRQn);
-            break;
-        default:
-            return -1;
-    }
-    
-    // Generate index of function pointer table
-    // PIO0_0 - PIO0_11 :  0..11
-    // PIO1_0 - PIO1_11 : 12..23
-    // PIO2_0 - PIO2_11 : 24..35
-    // PIO3_0 - PIO3_5  : 36..41
-    channel = (port_num * 12) + ((pin & 0x0F00) >> PIN_SHIFT);
-    
-    channel_ids[channel] = id;
-    obj->ch = channel;
-    
-    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) {
-    // Firstly, check if there is an existing event stored...
-
-    LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (((obj->pin & 0xF000) >> PORT_SHIFT) * 0x10000)));
-
-    // Need to get the pin number of the pin, not the value of the enum
-    uint32_t pin_num = (1 << ((obj->pin & 0x0f00) >> PIN_SHIFT));
-   
-    // Clear
-    port_reg->IC |= pin_num;
-    
-    // Make it edge sensitive.
-    port_reg->IS &= ~pin_num;
-
-    if ( (port_reg->IE & pin_num) != 0) {
-    // We have an event.
-    // Enable both edge interrupts.
-
-        if (enable) {
-            port_reg->IBE |= pin_num;
-            port_reg->IE  |= pin_num;
-        }
-        else {
-            // These all need to be opposite, to reenable the other one.
-            port_reg->IBE &= ~pin_num;
-
-            if (event == IRQ_RISE)
-                port_reg->IEV &= ~pin_num;
-            else 
-                port_reg->IEV |=  pin_num;
-
-            port_reg->IE |= pin_num;
-        }
-    }
-    else {
-        // One edge
-        port_reg->IBE &= ~pin_num;
-        // Rising/falling?
-        if (event == IRQ_RISE)
-            port_reg->IEV |=  pin_num;
-        else
-            port_reg->IEV &= ~pin_num;
-
-        if (enable) {
-            port_reg->IE |= pin_num;
-        }
-    }
-
-}
-
-void gpio_irq_enable(gpio_irq_t *obj) {
-    uint32_t port_num = ((obj->pin & 0xF000) >> PORT_SHIFT);
-    switch (port_num) {
-        case 0:
-            NVIC_EnableIRQ(EINT0_IRQn);
-            break;
-        case 1:
-            NVIC_EnableIRQ(EINT1_IRQn);
-            break;
-        case 2:
-            NVIC_EnableIRQ(EINT2_IRQn);
-            break;
-        case 3:
-            NVIC_EnableIRQ(EINT3_IRQn);
-            break;
-        default:
-            break;
-    }
-}
-
-void gpio_irq_disable(gpio_irq_t *obj) {
-    uint32_t port_num = ((obj->pin & 0xF000) >> PORT_SHIFT);
-    switch (port_num) {
-        case 0:
-            NVIC_DisableIRQ(EINT0_IRQn);
-            break;
-        case 1:
-            NVIC_DisableIRQ(EINT1_IRQn);
-            break;
-        case 2:
-            NVIC_DisableIRQ(EINT2_IRQn);
-            break;
-        case 3:
-            NVIC_DisableIRQ(EINT3_IRQn);
-            break;
-        default:
-            break;
-    }
-}