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_LPC11U6X/gpio_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) 2006-2014 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 "mbed_assert.h"
be_bryan 0:b74591d5ab33 17 #include "gpio_api.h"
be_bryan 0:b74591d5ab33 18 #include "pinmap.h"
be_bryan 0:b74591d5ab33 19
be_bryan 0:b74591d5ab33 20 static int gpio_enabled = 0;
be_bryan 0:b74591d5ab33 21
be_bryan 0:b74591d5ab33 22 static void gpio_enable(void) {
be_bryan 0:b74591d5ab33 23 gpio_enabled = 1;
be_bryan 0:b74591d5ab33 24
be_bryan 0:b74591d5ab33 25 /* Enable AHB clock to the GPIO and IOCON domain. */
be_bryan 0:b74591d5ab33 26 LPC_SYSCON->SYSAHBCLKCTRL |= ((1 << 16) | (1 << 6));
be_bryan 0:b74591d5ab33 27 }
be_bryan 0:b74591d5ab33 28
be_bryan 0:b74591d5ab33 29 uint32_t gpio_set(PinName pin) {
be_bryan 0:b74591d5ab33 30 MBED_ASSERT(pin != (PinName)NC);
be_bryan 0:b74591d5ab33 31 if (!gpio_enabled)
be_bryan 0:b74591d5ab33 32 gpio_enable();
be_bryan 0:b74591d5ab33 33
be_bryan 0:b74591d5ab33 34 int func = ((pin == P0_0) || // reset
be_bryan 0:b74591d5ab33 35 (pin == P0_10) || // SWCLK
be_bryan 0:b74591d5ab33 36 (pin == P0_11) || // TDI
be_bryan 0:b74591d5ab33 37 (pin == P0_12) || // TMS
be_bryan 0:b74591d5ab33 38 (pin == P0_13) || // TDO
be_bryan 0:b74591d5ab33 39 (pin == P0_14) || // TRST
be_bryan 0:b74591d5ab33 40 (pin == P0_15)) ? (1) : (0); // SWDIO
be_bryan 0:b74591d5ab33 41
be_bryan 0:b74591d5ab33 42 pin_function(pin, func);
be_bryan 0:b74591d5ab33 43
be_bryan 0:b74591d5ab33 44 return (1UL << ((int)pin >> PIN_SHIFT & 0x1F));
be_bryan 0:b74591d5ab33 45 }
be_bryan 0:b74591d5ab33 46
be_bryan 0:b74591d5ab33 47 void gpio_init(gpio_t *obj, PinName pin) {
be_bryan 0:b74591d5ab33 48 obj->pin = pin;
be_bryan 0:b74591d5ab33 49 if (pin == (PinName)NC)
be_bryan 0:b74591d5ab33 50 return;
be_bryan 0:b74591d5ab33 51
be_bryan 0:b74591d5ab33 52 obj->mask = gpio_set(pin);
be_bryan 0:b74591d5ab33 53
be_bryan 0:b74591d5ab33 54 unsigned int port = (unsigned int)(pin >> PORT_SHIFT);
be_bryan 0:b74591d5ab33 55
be_bryan 0:b74591d5ab33 56 obj->reg_set = &LPC_GPIO_PORT->SET[port];
be_bryan 0:b74591d5ab33 57 obj->reg_clr = &LPC_GPIO_PORT->CLR[port];
be_bryan 0:b74591d5ab33 58 obj->reg_in = &LPC_GPIO_PORT->PIN[port];
be_bryan 0:b74591d5ab33 59 obj->reg_dir = &LPC_GPIO_PORT->DIR[port];
be_bryan 0:b74591d5ab33 60 }
be_bryan 0:b74591d5ab33 61
be_bryan 0:b74591d5ab33 62 void gpio_mode(gpio_t *obj, PinMode mode) {
be_bryan 0:b74591d5ab33 63 pin_mode(obj->pin, mode);
be_bryan 0:b74591d5ab33 64 }
be_bryan 0:b74591d5ab33 65
be_bryan 0:b74591d5ab33 66 void gpio_dir(gpio_t *obj, PinDirection direction) {
be_bryan 0:b74591d5ab33 67 MBED_ASSERT(obj->pin != (PinName)NC);
be_bryan 0:b74591d5ab33 68 switch (direction) {
be_bryan 0:b74591d5ab33 69 case PIN_INPUT :
be_bryan 0:b74591d5ab33 70 *obj->reg_dir &= ~obj->mask;
be_bryan 0:b74591d5ab33 71 break;
be_bryan 0:b74591d5ab33 72 case PIN_OUTPUT:
be_bryan 0:b74591d5ab33 73 *obj->reg_dir |= obj->mask;
be_bryan 0:b74591d5ab33 74 break;
be_bryan 0:b74591d5ab33 75 }
be_bryan 0:b74591d5ab33 76 }