Joris Aerts / mbed-src

mbed library sources

Dependents:   Marvino mbot

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC176X/port_api.c@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Parent:
vendor/NXP/LPC1768/hal/port_api.c@10:3bc89ef62ce7 
Update mbed sources to revision 64

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
emilmont 10:3bc89ef62ce7 16 #include "port_api.h"
emilmont 10:3bc89ef62ce7 17 #include "pinmap.h"
emilmont 10:3bc89ef62ce7 18 #include "gpio_api.h"
emilmont 10:3bc89ef62ce7 19
emilmont 10:3bc89ef62ce7 20 PinName port_pin(PortName port, int pin_n) {
emilmont 10:3bc89ef62ce7 21 return (PinName)(LPC_GPIO0_BASE + ((port << PORT_SHIFT) | pin_n));
emilmont 10:3bc89ef62ce7 22 }
emilmont 10:3bc89ef62ce7 23
emilmont 10:3bc89ef62ce7 24 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
emilmont 10:3bc89ef62ce7 25 obj->port = port;
emilmont 10:3bc89ef62ce7 26 obj->mask = mask;
emilmont 10:3bc89ef62ce7 27
emilmont 10:3bc89ef62ce7 28 LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *)(LPC_GPIO0_BASE + ((int)port * 0x20));
emilmont 10:3bc89ef62ce7 29
emilmont 10:3bc89ef62ce7 30 // Do not use masking, because it prevents the use of the unmasked pins
emilmont 10:3bc89ef62ce7 31 // port_reg->FIOMASK = ~mask;
emilmont 10:3bc89ef62ce7 32
emilmont 10:3bc89ef62ce7 33 obj->reg_out = &port_reg->FIOPIN;
emilmont 10:3bc89ef62ce7 34 obj->reg_in = &port_reg->FIOPIN;
emilmont 10:3bc89ef62ce7 35 obj->reg_dir = &port_reg->FIODIR;
emilmont 10:3bc89ef62ce7 36
emilmont 10:3bc89ef62ce7 37 uint32_t i;
emilmont 10:3bc89ef62ce7 38 // The function is set per pin: reuse gpio logic
emilmont 10:3bc89ef62ce7 39 for (i=0; i<32; i++) {
emilmont 10:3bc89ef62ce7 40 if (obj->mask & (1<<i)) {
emilmont 10:3bc89ef62ce7 41 gpio_set(port_pin(obj->port, i));
emilmont 10:3bc89ef62ce7 42 }
emilmont 10:3bc89ef62ce7 43 }
emilmont 10:3bc89ef62ce7 44
emilmont 10:3bc89ef62ce7 45 port_dir(obj, dir);
emilmont 10:3bc89ef62ce7 46 }
emilmont 10:3bc89ef62ce7 47
emilmont 10:3bc89ef62ce7 48 void port_mode(port_t *obj, PinMode mode) {
emilmont 10:3bc89ef62ce7 49 uint32_t i;
emilmont 10:3bc89ef62ce7 50 // The mode is set per pin: reuse pinmap logic
emilmont 10:3bc89ef62ce7 51 for (i=0; i<32; i++) {
emilmont 10:3bc89ef62ce7 52 if (obj->mask & (1<<i)) {
emilmont 10:3bc89ef62ce7 53 pin_mode(port_pin(obj->port, i), mode);
emilmont 10:3bc89ef62ce7 54 }
emilmont 10:3bc89ef62ce7 55 }
emilmont 10:3bc89ef62ce7 56 }
emilmont 10:3bc89ef62ce7 57
emilmont 10:3bc89ef62ce7 58 void port_dir(port_t *obj, PinDirection dir) {
emilmont 10:3bc89ef62ce7 59 switch (dir) {
emilmont 10:3bc89ef62ce7 60 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
emilmont 10:3bc89ef62ce7 61 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
emilmont 10:3bc89ef62ce7 62 }
emilmont 10:3bc89ef62ce7 63 }
emilmont 10:3bc89ef62ce7 64
emilmont 10:3bc89ef62ce7 65 void port_write(port_t *obj, int value) {
emilmont 10:3bc89ef62ce7 66 *obj->reg_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask);
emilmont 10:3bc89ef62ce7 67 }
emilmont 10:3bc89ef62ce7 68
emilmont 10:3bc89ef62ce7 69 int port_read(port_t *obj) {
emilmont 10:3bc89ef62ce7 70 return (*obj->reg_in & obj->mask);
emilmont 10:3bc89ef62ce7 71 }