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targets/hal/TARGET_NXP/TARGET_LPC408X/port_api.c@34:a3c7023e45de, 2013-10-11 (annotated)

Committer:
mbed_official
Date:
Fri Oct 11 13:30:08 2013 +0100
Revision:
34:a3c7023e45de
Parent:
15:4892fe388435 
Synchronized with git revision eaafc74ae29c565a716b8c5f9d5899ef7d680b8b

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 15:4892fe388435 1 /* mbed Microcontroller Library
bogdanm 15:4892fe388435 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 15:4892fe388435 3 *
bogdanm 15:4892fe388435 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 15:4892fe388435 5 * you may not use this file except in compliance with the License.
bogdanm 15:4892fe388435 6 * You may obtain a copy of the License at
bogdanm 15:4892fe388435 7 *
bogdanm 15:4892fe388435 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 15:4892fe388435 9 *
bogdanm 15:4892fe388435 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 15:4892fe388435 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 15:4892fe388435 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 15:4892fe388435 13 * See the License for the specific language governing permissions and
bogdanm 15:4892fe388435 14 * limitations under the License.
bogdanm 15:4892fe388435 15 */
bogdanm 15:4892fe388435 16 #include "port_api.h"
bogdanm 15:4892fe388435 17 #include "pinmap.h"
bogdanm 15:4892fe388435 18 #include "gpio_api.h"
bogdanm 15:4892fe388435 19
mbed_official 34:a3c7023e45de 20
bogdanm 15:4892fe388435 21 PinName port_pin(PortName port, int pin_n) {
mbed_official 34:a3c7023e45de 22 return (PinName)(((port << PORT_SHIFT) | pin_n));
bogdanm 15:4892fe388435 23 }
bogdanm 15:4892fe388435 24
bogdanm 15:4892fe388435 25 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
bogdanm 15:4892fe388435 26 obj->port = port;
bogdanm 15:4892fe388435 27 obj->mask = mask;
bogdanm 15:4892fe388435 28
bogdanm 15:4892fe388435 29 LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *)(LPC_GPIO0_BASE + ((int)port * 0x20));
bogdanm 15:4892fe388435 30
bogdanm 15:4892fe388435 31 port_reg->MASK = ~mask;
bogdanm 15:4892fe388435 32
bogdanm 15:4892fe388435 33 obj->reg_out = &port_reg->PIN;
bogdanm 15:4892fe388435 34 obj->reg_in = &port_reg->PIN;
bogdanm 15:4892fe388435 35 obj->reg_dir = &port_reg->DIR;
bogdanm 15:4892fe388435 36
bogdanm 15:4892fe388435 37 uint32_t i;
bogdanm 15:4892fe388435 38 // The function is set per pin: reuse gpio logic
bogdanm 15:4892fe388435 39 for (i=0; i<32; i++) {
bogdanm 15:4892fe388435 40 if (obj->mask & (1<<i)) {
bogdanm 15:4892fe388435 41 gpio_set(port_pin(obj->port, i));
bogdanm 15:4892fe388435 42 }
bogdanm 15:4892fe388435 43 }
bogdanm 15:4892fe388435 44
bogdanm 15:4892fe388435 45 port_dir(obj, dir);
bogdanm 15:4892fe388435 46 }
bogdanm 15:4892fe388435 47
bogdanm 15:4892fe388435 48 void port_mode(port_t *obj, PinMode mode) {
bogdanm 15:4892fe388435 49 uint32_t i;
bogdanm 15:4892fe388435 50 // The mode is set per pin: reuse pinmap logic
bogdanm 15:4892fe388435 51 for (i=0; i<32; i++) {
bogdanm 15:4892fe388435 52 if (obj->mask & (1<<i)) {
bogdanm 15:4892fe388435 53 pin_mode(port_pin(obj->port, i), mode);
bogdanm 15:4892fe388435 54 }
bogdanm 15:4892fe388435 55 }
bogdanm 15:4892fe388435 56 }
bogdanm 15:4892fe388435 57
bogdanm 15:4892fe388435 58 void port_dir(port_t *obj, PinDirection dir) {
bogdanm 15:4892fe388435 59 switch (dir) {
bogdanm 15:4892fe388435 60 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
bogdanm 15:4892fe388435 61 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
bogdanm 15:4892fe388435 62 }
bogdanm 15:4892fe388435 63 }
bogdanm 15:4892fe388435 64
bogdanm 15:4892fe388435 65 void port_write(port_t *obj, int value) {
bogdanm 15:4892fe388435 66 *obj->reg_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask);
bogdanm 15:4892fe388435 67 }
bogdanm 15:4892fe388435 68
bogdanm 15:4892fe388435 69 int port_read(port_t *obj) {
bogdanm 15:4892fe388435 70 return (*obj->reg_in & obj->mask);
bogdanm 15:4892fe388435 71 }