tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KLXX/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 << 2));
  22 }
  23
  24 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
  25     obj->port = port;
  26     obj->mask = mask;
  27 #if defined(TARGET_KL43Z)
  28     GPIO_Type *reg = (GPIO_Type *)(GPIOA_BASE + port * 0x40);
  29 #else
  30     FGPIO_Type *reg = (FGPIO_Type *)(FPTA_BASE + port * 0x40);
  31 #endif
  32     obj->reg_out = &reg->PDOR;
  33     obj->reg_in  = &reg->PDIR;
  34     obj->reg_dir = &reg->PDDR;
  35
  36     uint32_t i;
  37     // The function is set per pin: reuse gpio logic
  38     for (i=0; i<32; i++) {
  39         if (obj->mask & (1<<i)) {
  40             gpio_set(port_pin(obj->port, i));
  41         }
  42     }
  43
  44     port_dir(obj, dir);
  45 }
  46
  47 void port_mode(port_t *obj, PinMode mode) {
  48     uint32_t i;
  49     // The mode is set per pin: reuse pinmap logic
  50     for (i=0; i<32; i++) {
  51         if (obj->mask & (1<<i)) {
  52             pin_mode(port_pin(obj->port, i), mode);
  53         }
  54     }
  55 }
  56
  57 void port_dir(port_t *obj, PinDirection dir) {
  58     switch (dir) {
  59         case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
  60         case PIN_OUTPUT: *obj->reg_dir |=  obj->mask; break;
  61     }
  62 }
  63
  64 void port_write(port_t *obj, int value) {
  65     *obj->reg_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask);
  66 }
  67
  68 int port_read(port_t *obj) {
  69     return (*obj->reg_in & obj->mask);
  70 }