mbed/src/vendor/NXP/capi/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 #if DEVICE_PORTIN || DEVICE_PORTOUT
  21
  22 PinName port_pin(PortName port, int pin_n) {
  23 #if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
  24     return (PinName)(LPC_GPIO0_BASE + ((port << PORT_SHIFT) | pin_n));
  25 #elif defined(TARGET_LPC11U24)
  26     return (PinName)((port << PORT_SHIFT) | pin_n);
  27 #endif
  28 }
  29
  30 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
  31     obj->port = port;
  32     obj->mask = mask;
  33
  34 #if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
  35     LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *)(LPC_GPIO0_BASE + ((int)port * 0x20));
  36
  37     // Do not use masking, because it prevents the use of the unmasked pins
  38     // port_reg->FIOMASK = ~mask;
  39
  40     obj->reg_out = &port_reg->FIOPIN;
  41     obj->reg_in  = &port_reg->FIOPIN;
  42     obj->reg_dir  = &port_reg->FIODIR;
  43
  44 #elif defined(TARGET_LPC11U24)
  45     LPC_GPIO->MASK[port] = ~mask;
  46
  47     obj->reg_mpin = &LPC_GPIO->MPIN[port];
  48     obj->reg_dir = &LPC_GPIO->DIR[port];
  49 #endif
  50     uint32_t i;
  51     // The function is set per pin: reuse gpio logic
  52     for (i=0; i<32; i++) {
  53         if (obj->mask & (1<<i)) {
  54             gpio_set(port_pin(obj->port, i));
  55         }
  56     }
  57
  58     port_dir(obj, dir);
  59 }
  60
  61 void port_mode(port_t *obj, PinMode mode) {
  62     uint32_t i;
  63     // The mode is set per pin: reuse pinmap logic
  64     for (i=0; i<32; i++) {
  65         if (obj->mask & (1<<i)) {
  66             pin_mode(port_pin(obj->port, i), mode);
  67         }
  68     }
  69 }
  70
  71 void port_dir(port_t *obj, PinDirection dir) {
  72     switch (dir) {
  73         case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
  74         case PIN_OUTPUT: *obj->reg_dir |=  obj->mask; break;
  75     }
  76 }
  77
  78 void port_write(port_t *obj, int value) {
  79 #if defined(TARGET_LPC11U24)
  80     *obj->reg_mpin = value;
  81 #elif defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
  82     *obj->reg_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask);
  83 #endif
  84 }
  85
  86 int port_read(port_t *obj) {
  87 #if defined(TARGET_LPC11U24)
  88     return (*obj->reg_mpin);
  89 #elif defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
  90     return (*obj->reg_in & obj->mask);
  91 #endif
  92 }
  93
  94 #endif