mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_NXP/TARGET_LPC11U6X/gpio_api.c@181:57724642e740, 2018-02-16 (annotated)

Committer:
AnnaBridge
Date:
Fri Feb 16 16:09:33 2018 +0000
Revision:
181:57724642e740
Parent:
149:156823d33999 
mbed-dev library. Release version 159.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2014 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 17 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 18 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 static int gpio_enabled = 0;
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 static void gpio_enable(void) {
<> 144:ef7eb2e8f9f7 23 gpio_enabled = 1;
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 /* Enable AHB clock to the GPIO and IOCON domain. */
<> 144:ef7eb2e8f9f7 26 LPC_SYSCON->SYSAHBCLKCTRL |= ((1 << 16) | (1 << 6));
<> 144:ef7eb2e8f9f7 27 }
<> 144:ef7eb2e8f9f7 28
<> 144:ef7eb2e8f9f7 29 uint32_t gpio_set(PinName pin) {
<> 144:ef7eb2e8f9f7 30 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 31 if (!gpio_enabled)
<> 144:ef7eb2e8f9f7 32 gpio_enable();
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 int func = ((pin == P0_0) || // reset
<> 144:ef7eb2e8f9f7 35 (pin == P0_10) || // SWCLK
<> 144:ef7eb2e8f9f7 36 (pin == P0_11) || // TDI
<> 144:ef7eb2e8f9f7 37 (pin == P0_12) || // TMS
<> 144:ef7eb2e8f9f7 38 (pin == P0_13) || // TDO
<> 144:ef7eb2e8f9f7 39 (pin == P0_14) || // TRST
<> 144:ef7eb2e8f9f7 40 (pin == P0_15)) ? (1) : (0); // SWDIO
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 pin_function(pin, func);
<> 144:ef7eb2e8f9f7 43
<> 144:ef7eb2e8f9f7 44 return (1UL << ((int)pin >> PIN_SHIFT & 0x1F));
<> 144:ef7eb2e8f9f7 45 }
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 void gpio_init(gpio_t *obj, PinName pin) {
<> 144:ef7eb2e8f9f7 48 obj->pin = pin;
<> 144:ef7eb2e8f9f7 49 if (pin == (PinName)NC)
<> 144:ef7eb2e8f9f7 50 return;
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 obj->mask = gpio_set(pin);
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 unsigned int port = (unsigned int)(pin >> PORT_SHIFT);
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 obj->reg_set = &LPC_GPIO_PORT->SET[port];
<> 144:ef7eb2e8f9f7 57 obj->reg_clr = &LPC_GPIO_PORT->CLR[port];
<> 144:ef7eb2e8f9f7 58 obj->reg_in = &LPC_GPIO_PORT->PIN[port];
<> 144:ef7eb2e8f9f7 59 obj->reg_dir = &LPC_GPIO_PORT->DIR[port];
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 void gpio_mode(gpio_t *obj, PinMode mode) {
<> 144:ef7eb2e8f9f7 63 pin_mode(obj->pin, mode);
<> 144:ef7eb2e8f9f7 64 }
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 void gpio_dir(gpio_t *obj, PinDirection direction) {
<> 144:ef7eb2e8f9f7 67 MBED_ASSERT(obj->pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 68 switch (direction) {
<> 144:ef7eb2e8f9f7 69 case PIN_INPUT :
<> 144:ef7eb2e8f9f7 70 *obj->reg_dir &= ~obj->mask;
<> 144:ef7eb2e8f9f7 71 break;
<> 144:ef7eb2e8f9f7 72 case PIN_OUTPUT:
<> 144:ef7eb2e8f9f7 73 *obj->reg_dir |= obj->mask;
<> 144:ef7eb2e8f9f7 74 break;
<> 144:ef7eb2e8f9f7 75 }
<> 144:ef7eb2e8f9f7 76 }