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_LPC11XX_11CXX/gpio_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
149:156823d33999 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 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 #include "reserved_pins.h"
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 static const PinName reserved_pins[] = TARGET_RESERVED_PINS;
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 uint32_t gpio_set(PinName pin) {
<> 144:ef7eb2e8f9f7 24 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 25 // PIO default value of following ports are not same as others
<> 144:ef7eb2e8f9f7 26 unsigned i;
<> 144:ef7eb2e8f9f7 27 int f = 0;
<> 144:ef7eb2e8f9f7 28
<> 144:ef7eb2e8f9f7 29 for (i = 0; i < sizeof(reserved_pins) / sizeof(PinName); i ++) {
<> 144:ef7eb2e8f9f7 30 if (pin == reserved_pins[i]) {
<> 144:ef7eb2e8f9f7 31 f = 1;
<> 144:ef7eb2e8f9f7 32 break;
<> 144:ef7eb2e8f9f7 33 }
<> 144:ef7eb2e8f9f7 34 }
<> 144:ef7eb2e8f9f7 35 pin_function(pin, f);
<> 144:ef7eb2e8f9f7 36 return ((pin & 0x0F00) >> 8);
<> 144:ef7eb2e8f9f7 37 }
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 void gpio_init(gpio_t *obj, PinName pin) {
<> 144:ef7eb2e8f9f7 40 obj->pin = pin;
<> 144:ef7eb2e8f9f7 41 if (pin == (PinName)NC)
<> 144:ef7eb2e8f9f7 42 return;
<> 144:ef7eb2e8f9f7 43
<> 144:ef7eb2e8f9f7 44 LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (((pin & 0xF000) >> PORT_SHIFT) * 0x10000)));
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 obj->reg_mask_read = &port_reg->MASKED_ACCESS[1 << gpio_set(pin)];
<> 144:ef7eb2e8f9f7 47 obj->reg_dir = &port_reg->DIR;
<> 144:ef7eb2e8f9f7 48 obj->reg_write = &port_reg->DATA;
<> 144:ef7eb2e8f9f7 49 }
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 void gpio_mode(gpio_t *obj, PinMode mode) {
<> 144:ef7eb2e8f9f7 52 pin_mode(obj->pin, mode);
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 void gpio_dir(gpio_t *obj, PinDirection direction) {
<> 144:ef7eb2e8f9f7 56 MBED_ASSERT(obj->pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 57 int pin_number = ((obj->pin & 0x0F00) >> 8);
<> 144:ef7eb2e8f9f7 58 switch (direction) {
<> 144:ef7eb2e8f9f7 59 case PIN_INPUT :
<> 144:ef7eb2e8f9f7 60 *obj->reg_dir &= ~(1 << pin_number);
<> 144:ef7eb2e8f9f7 61 break;
<> 144:ef7eb2e8f9f7 62 case PIN_OUTPUT:
<> 144:ef7eb2e8f9f7 63 *obj->reg_dir |= (1 << pin_number);
<> 144:ef7eb2e8f9f7 64 break;
<> 144:ef7eb2e8f9f7 65 }
<> 144:ef7eb2e8f9f7 66 }