EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

targets/TARGET_NXP/TARGET_LPC176X/port_api.c@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 * Copyright (c) 2006-2013 ARM Limited
be_bryan 0:b74591d5ab33 3 *
be_bryan 0:b74591d5ab33 4 * Licensed under the Apache License, Version 2.0 (the "License");
be_bryan 0:b74591d5ab33 5 * you may not use this file except in compliance with the License.
be_bryan 0:b74591d5ab33 6 * You may obtain a copy of the License at
be_bryan 0:b74591d5ab33 7 *
be_bryan 0:b74591d5ab33 8 * http://www.apache.org/licenses/LICENSE-2.0
be_bryan 0:b74591d5ab33 9 *
be_bryan 0:b74591d5ab33 10 * Unless required by applicable law or agreed to in writing, software
be_bryan 0:b74591d5ab33 11 * distributed under the License is distributed on an "AS IS" BASIS,
be_bryan 0:b74591d5ab33 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
be_bryan 0:b74591d5ab33 13 * See the License for the specific language governing permissions and
be_bryan 0:b74591d5ab33 14 * limitations under the License.
be_bryan 0:b74591d5ab33 15 */
be_bryan 0:b74591d5ab33 16 #include "port_api.h"
be_bryan 0:b74591d5ab33 17 #include "pinmap.h"
be_bryan 0:b74591d5ab33 18 #include "gpio_api.h"
be_bryan 0:b74591d5ab33 19
be_bryan 0:b74591d5ab33 20 PinName port_pin(PortName port, int pin_n) {
be_bryan 0:b74591d5ab33 21 return (PinName)(LPC_GPIO0_BASE + ((port << PORT_SHIFT) | pin_n));
be_bryan 0:b74591d5ab33 22 }
be_bryan 0:b74591d5ab33 23
be_bryan 0:b74591d5ab33 24 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
be_bryan 0:b74591d5ab33 25 obj->port = port;
be_bryan 0:b74591d5ab33 26 obj->mask = mask;
be_bryan 0:b74591d5ab33 27
be_bryan 0:b74591d5ab33 28 LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *)(LPC_GPIO0_BASE + ((int)port * 0x20));
be_bryan 0:b74591d5ab33 29
be_bryan 0:b74591d5ab33 30 // Do not use masking, because it prevents the use of the unmasked pins
be_bryan 0:b74591d5ab33 31 // port_reg->FIOMASK = ~mask;
be_bryan 0:b74591d5ab33 32
be_bryan 0:b74591d5ab33 33 obj->reg_out = &port_reg->FIOPIN;
be_bryan 0:b74591d5ab33 34 obj->reg_in = &port_reg->FIOPIN;
be_bryan 0:b74591d5ab33 35 obj->reg_dir = &port_reg->FIODIR;
be_bryan 0:b74591d5ab33 36
be_bryan 0:b74591d5ab33 37 uint32_t i;
be_bryan 0:b74591d5ab33 38 // The function is set per pin: reuse gpio logic
be_bryan 0:b74591d5ab33 39 for (i=0; i<32; i++) {
be_bryan 0:b74591d5ab33 40 if (obj->mask & (1<<i)) {
be_bryan 0:b74591d5ab33 41 gpio_set(port_pin(obj->port, i));
be_bryan 0:b74591d5ab33 42 }
be_bryan 0:b74591d5ab33 43 }
be_bryan 0:b74591d5ab33 44
be_bryan 0:b74591d5ab33 45 port_dir(obj, dir);
be_bryan 0:b74591d5ab33 46 }
be_bryan 0:b74591d5ab33 47
be_bryan 0:b74591d5ab33 48 void port_mode(port_t *obj, PinMode mode) {
be_bryan 0:b74591d5ab33 49 uint32_t i;
be_bryan 0:b74591d5ab33 50 // The mode is set per pin: reuse pinmap logic
be_bryan 0:b74591d5ab33 51 for (i=0; i<32; i++) {
be_bryan 0:b74591d5ab33 52 if (obj->mask & (1<<i)) {
be_bryan 0:b74591d5ab33 53 pin_mode(port_pin(obj->port, i), mode);
be_bryan 0:b74591d5ab33 54 }
be_bryan 0:b74591d5ab33 55 }
be_bryan 0:b74591d5ab33 56 }
be_bryan 0:b74591d5ab33 57
be_bryan 0:b74591d5ab33 58 void port_dir(port_t *obj, PinDirection dir) {
be_bryan 0:b74591d5ab33 59 switch (dir) {
be_bryan 0:b74591d5ab33 60 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
be_bryan 0:b74591d5ab33 61 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
be_bryan 0:b74591d5ab33 62 }
be_bryan 0:b74591d5ab33 63 }
be_bryan 0:b74591d5ab33 64
be_bryan 0:b74591d5ab33 65 void port_write(port_t *obj, int value) {
be_bryan 0:b74591d5ab33 66 *obj->reg_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask);
be_bryan 0:b74591d5ab33 67 }
be_bryan 0:b74591d5ab33 68
be_bryan 0:b74591d5ab33 69 int port_read(port_t *obj) {
be_bryan 0:b74591d5ab33 70 return (*obj->reg_in & obj->mask);
be_bryan 0:b74591d5ab33 71 }