shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC81X/gpio_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
227:7bd0639b8911 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 46:bebbbd80dd87 1 /* mbed Microcontroller Library
mbed_official 46:bebbbd80dd87 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 46:bebbbd80dd87 3 *
mbed_official 46:bebbbd80dd87 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 46:bebbbd80dd87 5 * you may not use this file except in compliance with the License.
mbed_official 46:bebbbd80dd87 6 * You may obtain a copy of the License at
mbed_official 46:bebbbd80dd87 7 *
mbed_official 46:bebbbd80dd87 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 46:bebbbd80dd87 9 *
mbed_official 46:bebbbd80dd87 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 46:bebbbd80dd87 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 46:bebbbd80dd87 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 46:bebbbd80dd87 13 * See the License for the specific language governing permissions and
mbed_official 46:bebbbd80dd87 14 * limitations under the License.
mbed_official 46:bebbbd80dd87 15 */
mbed_official 227:7bd0639b8911 16 #include "mbed_assert.h"
mbed_official 46:bebbbd80dd87 17 #include "gpio_api.h"
mbed_official 46:bebbbd80dd87 18 #include "pinmap.h"
mbed_official 46:bebbbd80dd87 19
mbed_official 46:bebbbd80dd87 20 static int gpio_enabled = 0;
mbed_official 46:bebbbd80dd87 21 static void gpio_enable(void) {
mbed_official 46:bebbbd80dd87 22 gpio_enabled = 1;
mbed_official 46:bebbbd80dd87 23
mbed_official 46:bebbbd80dd87 24 /* Enable AHB clock to the GPIO domain. */
mbed_official 46:bebbbd80dd87 25 LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
mbed_official 46:bebbbd80dd87 26
mbed_official 46:bebbbd80dd87 27 /* Peripheral reset control to GPIO and GPIO INT, a "1" bring it out of reset. */
mbed_official 46:bebbbd80dd87 28 LPC_SYSCON->PRESETCTRL &= ~(0x1<<10);
mbed_official 46:bebbbd80dd87 29 LPC_SYSCON->PRESETCTRL |= (0x1<<10);
mbed_official 46:bebbbd80dd87 30 }
mbed_official 46:bebbbd80dd87 31
mbed_official 46:bebbbd80dd87 32 uint32_t gpio_set(PinName pin) {
mbed_official 46:bebbbd80dd87 33 int f = 0;
mbed_official 46:bebbbd80dd87 34
mbed_official 46:bebbbd80dd87 35 if (!gpio_enabled)
mbed_official 46:bebbbd80dd87 36 gpio_enable();
mbed_official 46:bebbbd80dd87 37
mbed_official 46:bebbbd80dd87 38 pin_function(pin, f);
mbed_official 46:bebbbd80dd87 39
mbed_official 46:bebbbd80dd87 40 return (1 << ((int)pin & 0x1F));
mbed_official 46:bebbbd80dd87 41 }
mbed_official 46:bebbbd80dd87 42
mbed_official 113:65a335a675de 43 void gpio_init(gpio_t *obj, PinName pin) {
mbed_official 46:bebbbd80dd87 44 obj->pin = pin;
mbed_official 227:7bd0639b8911 45 if (pin == (PinName)NC)
mbed_official 227:7bd0639b8911 46 return;
mbed_official 227:7bd0639b8911 47
mbed_official 46:bebbbd80dd87 48 obj->mask = gpio_set(pin);
mbed_official 46:bebbbd80dd87 49
mbed_official 46:bebbbd80dd87 50 obj->reg_set = &LPC_GPIO_PORT->SET0;
mbed_official 46:bebbbd80dd87 51 obj->reg_clr = &LPC_GPIO_PORT->CLR0;
mbed_official 46:bebbbd80dd87 52 obj->reg_in = &LPC_GPIO_PORT->PIN0;
mbed_official 46:bebbbd80dd87 53 obj->reg_dir = &LPC_GPIO_PORT->DIR0;
mbed_official 46:bebbbd80dd87 54 }
mbed_official 46:bebbbd80dd87 55
mbed_official 46:bebbbd80dd87 56 void gpio_mode(gpio_t *obj, PinMode mode) {
mbed_official 46:bebbbd80dd87 57 pin_mode(obj->pin, mode);
mbed_official 46:bebbbd80dd87 58 }
mbed_official 46:bebbbd80dd87 59
mbed_official 46:bebbbd80dd87 60 void gpio_dir(gpio_t *obj, PinDirection direction) {
mbed_official 227:7bd0639b8911 61 MBED_ASSERT(obj->pin != (PinName)NC);
mbed_official 46:bebbbd80dd87 62 switch (direction) {
mbed_official 227:7bd0639b8911 63 case PIN_INPUT :
mbed_official 227:7bd0639b8911 64 *obj->reg_dir &= ~obj->mask;
mbed_official 227:7bd0639b8911 65 break;
mbed_official 227:7bd0639b8911 66 case PIN_OUTPUT:
mbed_official 227:7bd0639b8911 67 *obj->reg_dir |= obj->mask;
mbed_official 227:7bd0639b8911 68 break;
mbed_official 46:bebbbd80dd87 69 }
mbed_official 46:bebbbd80dd87 70 }