tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC13XX/port_api.c

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   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
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16 #include "port_api.h"
  17 #include "pinmap.h"
  18 #include "gpio_api.h"
  19
  20 PinName port_pin(PortName port, int pin_n) {
  21     return (PinName)((port << PORT_SHIFT) | pin_n);
  22 }
  23
  24 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
  25     obj->port = port;
  26     obj->mask = mask;
  27
  28     LPC_GPIO->MASK[port] = ~mask;
  29
  30     obj->reg_mpin = &LPC_GPIO->MPIN[port];
  31     obj->reg_dir = &LPC_GPIO->DIR[port];
  32
  33     uint32_t i;
  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));
  38         }
  39     }
  40
  41     port_dir(obj, dir);
  42 }
  43
  44 void port_mode(port_t *obj, PinMode mode) {
  45     uint32_t i;
  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);
  50         }
  51     }
  52 }
  53
  54 void port_dir(port_t *obj, PinDirection dir) {
  55     switch (dir) {
  56         case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
  57         case PIN_OUTPUT: *obj->reg_dir |=  obj->mask; break;
  58     }
  59 }
  60
  61 void port_write(port_t *obj, int value) {
  62     *obj->reg_mpin = value;
  63 }
  64
  65 int port_read(port_t *obj) {
  66     return (*obj->reg_mpin);
  67 }