mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

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

targets/TARGET_TT/TARGET_TT_M3HQ/gpio_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

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

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 189:f392fc9709a3 1 /* mbed Microcontroller Library
AnnaBridge 189:f392fc9709a3 2 * (C)Copyright TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION 2018 All rights reserved
AnnaBridge 189:f392fc9709a3 3 * SPDX-License-Identifier: Apache-2.0
AnnaBridge 189:f392fc9709a3 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 189:f392fc9709a3 5 * you may not use this file except in compliance with the License.
AnnaBridge 189:f392fc9709a3 6 * You may obtain a copy of the License at
AnnaBridge 189:f392fc9709a3 7 *
AnnaBridge 189:f392fc9709a3 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 189:f392fc9709a3 9 *
AnnaBridge 189:f392fc9709a3 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 189:f392fc9709a3 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 189:f392fc9709a3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 189:f392fc9709a3 13 * See the License for the specific language governing permissions and
AnnaBridge 189:f392fc9709a3 14 * limitations under the License.
AnnaBridge 189:f392fc9709a3 15 */
AnnaBridge 189:f392fc9709a3 16 #include "gpio_api.h"
AnnaBridge 189:f392fc9709a3 17 #include "pinmap.h"
AnnaBridge 189:f392fc9709a3 18 #include "mbed_error.h"
AnnaBridge 189:f392fc9709a3 19 #include "gpio_include.h"
AnnaBridge 189:f392fc9709a3 20
AnnaBridge 189:f392fc9709a3 21 extern const PinMap PinMap_GPIO_IRQ[];
AnnaBridge 189:f392fc9709a3 22 #define GPIO_DATA PIN_DATA(0, 2)
AnnaBridge 189:f392fc9709a3 23
AnnaBridge 189:f392fc9709a3 24 uint32_t gpio_set(PinName pin)
AnnaBridge 189:f392fc9709a3 25 {
AnnaBridge 189:f392fc9709a3 26 // Check that pin is valid
AnnaBridge 189:f392fc9709a3 27 MBED_ASSERT(pin != (PinName)NC);
AnnaBridge 189:f392fc9709a3 28 // Checking pin name is not interrupt pins
AnnaBridge 189:f392fc9709a3 29 // Set pin function as GPIO pin
AnnaBridge 189:f392fc9709a3 30 pin_function(pin, GPIO_DATA);
AnnaBridge 189:f392fc9709a3 31 // Return pin mask
AnnaBridge 189:f392fc9709a3 32 return (1 << (pin & 0x07));
AnnaBridge 189:f392fc9709a3 33 }
AnnaBridge 189:f392fc9709a3 34
AnnaBridge 189:f392fc9709a3 35 void gpio_init(gpio_t *obj, PinName pin)
AnnaBridge 189:f392fc9709a3 36 {
AnnaBridge 189:f392fc9709a3 37 // Store above pin mask, pin name into GPIO object
AnnaBridge 189:f392fc9709a3 38 obj->pin = pin;
AnnaBridge 189:f392fc9709a3 39 obj->mask = gpio_set(pin);
AnnaBridge 189:f392fc9709a3 40 obj->port = (PortName) (pin >> 3);
AnnaBridge 189:f392fc9709a3 41 TSB_CG->FSYSENA |= (1<<(obj->port));
AnnaBridge 189:f392fc9709a3 42 }
AnnaBridge 189:f392fc9709a3 43
AnnaBridge 189:f392fc9709a3 44 void gpio_mode(gpio_t *obj, PinMode mode)
AnnaBridge 189:f392fc9709a3 45 {
AnnaBridge 189:f392fc9709a3 46 pin_mode(obj->pin, mode);
AnnaBridge 189:f392fc9709a3 47 }
AnnaBridge 189:f392fc9709a3 48
AnnaBridge 189:f392fc9709a3 49 // Set gpio object pin direction
AnnaBridge 189:f392fc9709a3 50 void gpio_dir(gpio_t *obj, PinDirection direction)
AnnaBridge 189:f392fc9709a3 51 {
AnnaBridge 189:f392fc9709a3 52 // Set direction
AnnaBridge 189:f392fc9709a3 53 switch (direction) {
AnnaBridge 189:f392fc9709a3 54 case PIN_INPUT:
AnnaBridge 189:f392fc9709a3 55 pin_function(obj->pin, PIN_INPUT);
AnnaBridge 189:f392fc9709a3 56 break;
AnnaBridge 189:f392fc9709a3 57
AnnaBridge 189:f392fc9709a3 58 case PIN_OUTPUT:
AnnaBridge 189:f392fc9709a3 59 pin_function(obj->pin, PIN_OUTPUT);
AnnaBridge 189:f392fc9709a3 60 break;
AnnaBridge 189:f392fc9709a3 61
AnnaBridge 189:f392fc9709a3 62 case PIN_INOUT:
AnnaBridge 189:f392fc9709a3 63 pin_function(obj->pin, PIN_INOUT);
AnnaBridge 189:f392fc9709a3 64 break;
AnnaBridge 189:f392fc9709a3 65
AnnaBridge 189:f392fc9709a3 66 default:
AnnaBridge 189:f392fc9709a3 67 error("Invalid direction\n");
AnnaBridge 189:f392fc9709a3 68 break;
AnnaBridge 189:f392fc9709a3 69 }
AnnaBridge 189:f392fc9709a3 70 }
AnnaBridge 189:f392fc9709a3 71
AnnaBridge 189:f392fc9709a3 72 // Write gpio object pin data
AnnaBridge 189:f392fc9709a3 73 void gpio_write(gpio_t *obj, int value)
AnnaBridge 189:f392fc9709a3 74 {
AnnaBridge 189:f392fc9709a3 75 int port = 0;
AnnaBridge 189:f392fc9709a3 76 uint8_t bit = 0;
AnnaBridge 189:f392fc9709a3 77 uint32_t base;
AnnaBridge 189:f392fc9709a3 78
AnnaBridge 189:f392fc9709a3 79 // Calculate port and pin position
AnnaBridge 189:f392fc9709a3 80 port = PIN_PORT(obj->pin);
AnnaBridge 189:f392fc9709a3 81 bit = PIN_POS(obj->pin);
AnnaBridge 189:f392fc9709a3 82
AnnaBridge 189:f392fc9709a3 83 base = BITBAND_PORT_BASE(port);
AnnaBridge 189:f392fc9709a3 84 base = BITBAND_PORT_MODE_BASE(base, GPIO_Mode_DATA);
AnnaBridge 189:f392fc9709a3 85 if(value == GPIO_PIN_SET)
AnnaBridge 189:f392fc9709a3 86 BITBAND_PORT_SET(base, bit);
AnnaBridge 189:f392fc9709a3 87 else if(value == GPIO_PIN_RESET)
AnnaBridge 189:f392fc9709a3 88 BITBAND_PORT_CLR(base, bit);
AnnaBridge 189:f392fc9709a3 89 else
AnnaBridge 189:f392fc9709a3 90 error("Invalid value\n");
AnnaBridge 189:f392fc9709a3 91 }
AnnaBridge 189:f392fc9709a3 92
AnnaBridge 189:f392fc9709a3 93 // Read gpio object pin data
AnnaBridge 189:f392fc9709a3 94 int gpio_read (gpio_t *obj)
AnnaBridge 189:f392fc9709a3 95 {
AnnaBridge 189:f392fc9709a3 96 int port = 0;
AnnaBridge 189:f392fc9709a3 97 uint8_t bit = 0;
AnnaBridge 189:f392fc9709a3 98 uint32_t base;
AnnaBridge 189:f392fc9709a3 99 uint32_t val;
AnnaBridge 189:f392fc9709a3 100 int BitValue;
AnnaBridge 189:f392fc9709a3 101
AnnaBridge 189:f392fc9709a3 102 // Calculate port and pin position
AnnaBridge 189:f392fc9709a3 103 port = PIN_PORT(obj->pin);
AnnaBridge 189:f392fc9709a3 104 bit = PIN_POS(obj->pin);
AnnaBridge 189:f392fc9709a3 105
AnnaBridge 189:f392fc9709a3 106 base = BITBAND_PORT_BASE(port);
AnnaBridge 189:f392fc9709a3 107 base = BITBAND_PORT_MODE_BASE(base, GPIO_Mode_DATA);
AnnaBridge 189:f392fc9709a3 108 BITBAND_PORT_READ(val, base, bit);
AnnaBridge 189:f392fc9709a3 109 if(val == GPIO_PIN_RESET)
AnnaBridge 189:f392fc9709a3 110 BitValue = GPIO_PIN_RESET;
AnnaBridge 189:f392fc9709a3 111 else
AnnaBridge 189:f392fc9709a3 112 BitValue = GPIO_PIN_SET;
AnnaBridge 189:f392fc9709a3 113 return (BitValue);
AnnaBridge 189:f392fc9709a3 114 }