mbed library sources: Modified to operate FRDM-KL25Z at 48MHz from internal 32kHz oscillator (nothing else changed).
Fork of mbed-src by
The only file that changed is: mbed-src-FLL48/targets/cmsis/TARGET_Freescale/TARGET_KL25Z/system_MKL25Z4.h
Diff: targets/hal/TARGET_NXP/TARGET_LPC81X/gpio_irq_api.c
- Revision:
- 20:4263a77256ae
- Parent:
- 19:398f4c622e1b
- Child:
- 21:67d3158c7b56
--- a/targets/hal/TARGET_NXP/TARGET_LPC81X/gpio_irq_api.c Mon Aug 19 18:17:02 2013 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,127 +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" - -#define CHANNEL_NUM 8 -#define LPC_GPIO_X LPC_PIN_INT -#define PININT_IRQ PININT0_IRQn - -static uint32_t channel_ids[CHANNEL_NUM] = {0}; -static gpio_irq_handler irq_handler; - -static inline void handle_interrupt_in(uint32_t channel) { - uint32_t ch_bit = (1 << channel); - // Return immediately if: - // * The interrupt was already served - // * There is no user handler - // * It is a level interrupt, not an edge interrupt - if ( ((LPC_GPIO_X->IST & ch_bit) == 0) || - (channel_ids[channel] == 0 ) || - (LPC_GPIO_X->ISEL & ch_bit ) ) return; - - if ((LPC_GPIO_X->IENR & ch_bit) && (LPC_GPIO_X->RISE & ch_bit)) { - irq_handler(channel_ids[channel], IRQ_RISE); - LPC_GPIO_X->RISE = ch_bit; - } - if ((LPC_GPIO_X->IENF & ch_bit) && (LPC_GPIO_X->FALL & ch_bit)) { - irq_handler(channel_ids[channel], IRQ_FALL); - } - LPC_GPIO_X->IST = ch_bit; -} - -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);} -void gpio_irq4(void) {handle_interrupt_in(4);} -void gpio_irq5(void) {handle_interrupt_in(5);} -void gpio_irq6(void) {handle_interrupt_in(6);} -void gpio_irq7(void) {handle_interrupt_in(7);} - -int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { - if (pin == NC) return -1; - - irq_handler = handler; - - int found_free_channel = 0; - int i = 0; - for (i=0; i<CHANNEL_NUM; i++) { - if (channel_ids[i] == 0) { - channel_ids[i] = id; - obj->ch = i; - found_free_channel = 1; - break; - } - } - if (!found_free_channel) return -1; - - /* Enable AHB clock to the GPIO domain. */ - LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6); - - LPC_SYSCON->PINTSEL[obj->ch] = pin; - - // Interrupt Wake-Up Enable - LPC_SYSCON->STARTERP0 |= 1 << obj->ch; - - void (*channels_irq)(void) = NULL; - switch (obj->ch) { - case 0: channels_irq = &gpio_irq0; break; - case 1: channels_irq = &gpio_irq1; break; - case 2: channels_irq = &gpio_irq2; break; - case 3: channels_irq = &gpio_irq3; break; - case 4: channels_irq = &gpio_irq4; break; - case 5: channels_irq = &gpio_irq5; break; - case 6: channels_irq = &gpio_irq6; break; - case 7: channels_irq = &gpio_irq7; break; - } - NVIC_SetVector((IRQn_Type)(PININT_IRQ + obj->ch), (uint32_t)channels_irq); - NVIC_EnableIRQ((IRQn_Type)(PININT_IRQ + obj->ch)); - - return 0; -} - -void gpio_irq_free(gpio_irq_t *obj) { - channel_ids[obj->ch] = 0; - LPC_SYSCON->STARTERP0 &= ~(1 << obj->ch); -} - -void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) { - unsigned int ch_bit = (1 << obj->ch); - - // Clear interrupt - if (!(LPC_GPIO_X->ISEL & ch_bit)) - LPC_GPIO_X->IST = ch_bit; - - // Edge trigger - LPC_GPIO_X->ISEL &= ~ch_bit; - if (event == IRQ_RISE) { - if (enable) { - LPC_GPIO_X->IENR |= ch_bit; - } else { - LPC_GPIO_X->IENR &= ~ch_bit; - } - } else { - if (enable) { - LPC_GPIO_X->IENF |= ch_bit; - } else { - LPC_GPIO_X->IENF &= ~ch_bit; - } - } -}