1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
21 // LPC114 IOCON offset table [port][pin]
23 static uint8_t iocon_offset[4][12] = {
24 {0x0c,0x10,0x1c,0x2c,0x30,0x34,0x4c,0x50,0x60,0x64,0x68,0x74}, // PORT 0
25 {0x78,0x7c,0x80,0x90,0x94,0xa0,0xa4,0xa8,0x14,0x38,0x6c,0x98}, // PORT 1
26 {0x08,0x28,0x5c,0x8c,0x40,0x44,0x00,0x20,0x24,0x54,0x58,0x70}, // PORT 2
27 {0x84,0x88,0x9c,0xac,0x3c,0x48} // PORT 3
30 PinName port_pin(PortName port, int pin) {
31 return (PinName)((port << PORT_SHIFT) | (pin << PIN_SHIFT) | (uint32_t)iocon_offset[port][pin]);
34 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
38 LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (port * 0x10000)));
40 obj->reg_data = &port_reg->DATA;
41 obj->reg_dir = &port_reg->DIR;
44 // The function is set per pin: reuse gpio logic
45 for (i=0; i<12; i++) {
46 if (obj->mask & (1<<i)) {
47 gpio_set(port_pin(obj->port, i));
54 void port_mode(port_t *obj, PinMode mode) {
56 // The mode is set per pin: reuse pinmap logic
57 for (i=0; i<12; i++) {
58 if (obj->mask & (1<<i)) {
59 pin_mode(port_pin(obj->port, i), mode);
64 void port_dir(port_t *obj, PinDirection dir) {
66 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
67 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
71 void port_write(port_t *obj, int value) {
72 *obj->reg_data = (value & obj->mask);
75 int port_read(port_t *obj) {
76 return (*obj->reg_data & obj->mask);