1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2015 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 << 2));
24 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
28 GPIO_Type *reg = (GPIO_Type *)(PTA_BASE + port * 0x40);
30 obj->reg_out = ®->PDOR;
31 obj->reg_in = ®->PDIR;
32 obj->reg_dir = ®->PDDR;
35 // The function is set per pin: reuse gpio logic
36 for (i=0; i<32; i++) {
37 if (obj->mask & (1<<i)) {
38 gpio_set(port_pin(obj->port, i));
45 void port_mode(port_t *obj, PinMode mode) {
47 // The mode is set per pin: reuse pinmap logic
48 for (i=0; i<32; i++) {
49 if (obj->mask & (1<<i)) {
50 pin_mode(port_pin(obj->port, i), mode);
55 void port_dir(port_t *obj, PinDirection dir) {
58 *obj->reg_dir &= ~obj->mask;
61 *obj->reg_dir |= obj->mask;
66 void port_write(port_t *obj, int value) {
67 *obj->reg_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask);
70 int port_read(port_t *obj) {
71 return (*obj->reg_in & obj->mask);