1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
20 PinName port_pin(PortName port, int pin_n) {
21 return (PinName)((port << PORT_SHIFT) | pin_n);
24 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
28 LPC_GPIO->MASK[port] = ~mask;
30 obj->reg_mpin = &LPC_GPIO->MPIN[port];
31 obj->reg_dir = &LPC_GPIO->DIR[port];
34 // The function is set per pin: reuse gpio logic
35 for (i=0; i<32; i++) {
36 if (obj->mask & (1<<i)) {
37 gpio_set(port_pin(obj->port, i));
44 void port_mode(port_t *obj, PinMode mode) {
46 // The mode is set per pin: reuse pinmap logic
47 for (i=0; i<32; i++) {
48 if (obj->mask & (1<<i)) {
49 pin_mode(port_pin(obj->port, i), mode);
54 void port_dir(port_t *obj, PinDirection dir) {
56 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
57 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
61 void port_write(port_t *obj, int value) {
62 *obj->reg_mpin = value;
65 int port_read(port_t *obj) {
66 return (*obj->reg_mpin);