mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

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

targets/TARGET_ARM_SSG/TARGET_BEETLE/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) 2015 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 "gpio_api.h"
<> 144:ef7eb2e8f9f7 17 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 // function to enable the GPIO pin
<> 144:ef7eb2e8f9f7 20 uint32_t gpio_set(PinName pin) {
<> 144:ef7eb2e8f9f7 21 uint32_t pin_value = 0;
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 if(pin <= 15) {
<> 144:ef7eb2e8f9f7 24 pin_value = pin;
<> 144:ef7eb2e8f9f7 25 } else if (pin >= 16 && pin <= 31) {
<> 144:ef7eb2e8f9f7 26 pin_value = pin-16;
<> 144:ef7eb2e8f9f7 27 } else if (pin >= 1001 && pin <= 1004) {
<> 144:ef7eb2e8f9f7 28 /* Emulated LEDs */
<> 144:ef7eb2e8f9f7 29 return (1);
<> 144:ef7eb2e8f9f7 30 }
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 pin_function(pin, 0);
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 return (1 << pin_value);
<> 144:ef7eb2e8f9f7 35 }
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 //function to initialise the gpio pin
<> 144:ef7eb2e8f9f7 38 // this links the board control bits for each pin
<> 144:ef7eb2e8f9f7 39 // with the object created for the pin
<> 144:ef7eb2e8f9f7 40 void gpio_init(gpio_t *obj, PinName pin) {
<> 144:ef7eb2e8f9f7 41 if (pin == NC) {
<> 144:ef7eb2e8f9f7 42 return;
<> 144:ef7eb2e8f9f7 43 } else {
<> 144:ef7eb2e8f9f7 44 int pin_value = 0;
<> 144:ef7eb2e8f9f7 45 obj->pin = pin;
<> 144:ef7eb2e8f9f7 46 if (pin <=15) {
<> 144:ef7eb2e8f9f7 47 pin_value = pin;
<> 144:ef7eb2e8f9f7 48 } else if (pin >= 16 && pin <= 31) {
<> 144:ef7eb2e8f9f7 49 pin_value = pin-16;
<> 144:ef7eb2e8f9f7 50 } else if (pin >= 1001 && pin <= 1004) {
<> 144:ef7eb2e8f9f7 51 /* Emulated LEDs */
<> 144:ef7eb2e8f9f7 52 return;
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 obj->mask = 0x1 << pin_value;
<> 144:ef7eb2e8f9f7 56 obj->pin_number = pin;
<> 144:ef7eb2e8f9f7 57 if (pin <=15) {
<> 144:ef7eb2e8f9f7 58 obj->reg_data = &CMSDK_GPIO0->DATAOUT;
<> 144:ef7eb2e8f9f7 59 obj->reg_in = &CMSDK_GPIO0->DATA;
<> 144:ef7eb2e8f9f7 60 obj->reg_dir = &CMSDK_GPIO0->OUTENABLESET;
<> 144:ef7eb2e8f9f7 61 obj->reg_dirclr = &CMSDK_GPIO0->OUTENABLECLR;
<> 144:ef7eb2e8f9f7 62 } else if (pin >= 16 && pin <= 31) {
<> 144:ef7eb2e8f9f7 63 obj->reg_data = &CMSDK_GPIO1->DATAOUT;
<> 144:ef7eb2e8f9f7 64 obj->reg_in = &CMSDK_GPIO1->DATA;
<> 144:ef7eb2e8f9f7 65 obj->reg_dir = &CMSDK_GPIO1->OUTENABLESET;
<> 144:ef7eb2e8f9f7 66 obj->reg_dirclr = &CMSDK_GPIO1->OUTENABLECLR;
<> 144:ef7eb2e8f9f7 67 }
<> 144:ef7eb2e8f9f7 68 }
<> 144:ef7eb2e8f9f7 69 }
<> 144:ef7eb2e8f9f7 70
<> 144:ef7eb2e8f9f7 71 void gpio_mode(gpio_t *obj, PinMode mode) {
<> 144:ef7eb2e8f9f7 72 pin_mode(obj->pin, mode);
<> 144:ef7eb2e8f9f7 73 }
<> 144:ef7eb2e8f9f7 74
<> 144:ef7eb2e8f9f7 75 void gpio_dir(gpio_t *obj, PinDirection direction) {
<> 144:ef7eb2e8f9f7 76 if(obj->pin >= 0 && obj->pin <= 31) {
<> 144:ef7eb2e8f9f7 77 switch (direction) {
<> 144:ef7eb2e8f9f7 78 case PIN_INPUT : *obj->reg_dirclr = obj->mask; break;
<> 144:ef7eb2e8f9f7 79 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
<> 144:ef7eb2e8f9f7 80 }
<> 144:ef7eb2e8f9f7 81 } else {
<> 144:ef7eb2e8f9f7 82 return;
<> 144:ef7eb2e8f9f7 83 }
<> 144:ef7eb2e8f9f7 84 }
<> 144:ef7eb2e8f9f7 85
<> 144:ef7eb2e8f9f7 86 int gpio_is_connected(const gpio_t *obj){
<> 144:ef7eb2e8f9f7 87 if(obj->pin != (PinName)NC){
<> 144:ef7eb2e8f9f7 88 return 1;
<> 144:ef7eb2e8f9f7 89 } else {
<> 144:ef7eb2e8f9f7 90 return 0;
<> 144:ef7eb2e8f9f7 91 }
<> 144:ef7eb2e8f9f7 92 }