1 /*
2 * Copyright (c) 2023 ARM Limited. All rights reserved.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Licensed under the Apache License, Version 2.0 (the License); you may
7 * not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
14 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 #include "Driver_GPIO.h"
20
21 // Pin mapping
22 #define GPIO_MAX_PINS 64U
23 #define PIN_IS_AVAILABLE(n) ((n) < GPIO_MAX_PINS)
24
25
26 // Setup GPIO Interface
GPIO_Setup(ARM_GPIO_Pin_t pin,ARM_GPIO_SignalEvent_t cb_event)27 static int32_t GPIO_Setup (ARM_GPIO_Pin_t pin, ARM_GPIO_SignalEvent_t cb_event) {
28 int32_t result = ARM_DRIVER_OK;
29
30 if (PIN_IS_AVAILABLE(pin)) {
31 } else {
32 result = ARM_GPIO_ERROR_PIN;
33 }
34
35 return result;
36 }
37
38 // Set GPIO Direction
GPIO_SetDirection(ARM_GPIO_Pin_t pin,ARM_GPIO_DIRECTION direction)39 static int32_t GPIO_SetDirection (ARM_GPIO_Pin_t pin, ARM_GPIO_DIRECTION direction) {
40 int32_t result = ARM_DRIVER_OK;
41
42 if (PIN_IS_AVAILABLE(pin)) {
43 switch (direction) {
44 case ARM_GPIO_INPUT:
45 break;
46 case ARM_GPIO_OUTPUT:
47 break;
48 default:
49 result = ARM_DRIVER_ERROR_PARAMETER;
50 break;
51 }
52 } else {
53 result = ARM_GPIO_ERROR_PIN;
54 }
55
56 return result;
57 }
58
59 // Set GPIO Output Mode
GPIO_SetOutputMode(ARM_GPIO_Pin_t pin,ARM_GPIO_OUTPUT_MODE mode)60 static int32_t GPIO_SetOutputMode (ARM_GPIO_Pin_t pin, ARM_GPIO_OUTPUT_MODE mode) {
61 int32_t result = ARM_DRIVER_OK;
62
63 if (PIN_IS_AVAILABLE(pin)) {
64 switch (mode) {
65 case ARM_GPIO_PUSH_PULL:
66 break;
67 case ARM_GPIO_OPEN_DRAIN:
68 break;
69 default:
70 result = ARM_DRIVER_ERROR_PARAMETER;
71 break;
72 }
73 } else {
74 result = ARM_GPIO_ERROR_PIN;
75 }
76
77 return result;
78 }
79
80 // Set GPIO Pull Resistor
GPIO_SetPullResistor(ARM_GPIO_Pin_t pin,ARM_GPIO_PULL_RESISTOR resistor)81 static int32_t GPIO_SetPullResistor (ARM_GPIO_Pin_t pin, ARM_GPIO_PULL_RESISTOR resistor) {
82 int32_t result = ARM_DRIVER_OK;
83
84 if (PIN_IS_AVAILABLE(pin)) {
85 switch (resistor) {
86 case ARM_GPIO_PULL_NONE:
87 break;
88 case ARM_GPIO_PULL_UP:
89 break;
90 case ARM_GPIO_PULL_DOWN:
91 break;
92 default:
93 result = ARM_DRIVER_ERROR_PARAMETER;
94 break;
95 }
96 } else {
97 result = ARM_GPIO_ERROR_PIN;
98 }
99
100 return result;
101 }
102
103 // Set GPIO Event Trigger
GPIO_SetEventTrigger(ARM_GPIO_Pin_t pin,ARM_GPIO_EVENT_TRIGGER trigger)104 static int32_t GPIO_SetEventTrigger (ARM_GPIO_Pin_t pin, ARM_GPIO_EVENT_TRIGGER trigger) {
105 int32_t result = ARM_DRIVER_OK;
106
107 if (PIN_IS_AVAILABLE(pin)) {
108 switch (trigger) {
109 case ARM_GPIO_TRIGGER_NONE:
110 break;
111 case ARM_GPIO_TRIGGER_RISING_EDGE:
112 break;
113 case ARM_GPIO_TRIGGER_FALLING_EDGE:
114 break;
115 case ARM_GPIO_TRIGGER_EITHER_EDGE:
116 break;
117 default:
118 result = ARM_DRIVER_ERROR_PARAMETER;
119 break;
120 }
121 } else {
122 result = ARM_GPIO_ERROR_PIN;
123 }
124
125 return result;
126 }
127
128 // Set GPIO Output Level
GPIO_SetOutput(ARM_GPIO_Pin_t pin,uint32_t val)129 static void GPIO_SetOutput (ARM_GPIO_Pin_t pin, uint32_t val) {
130
131 if (PIN_IS_AVAILABLE(pin)) {
132 }
133 }
134
135 // Get GPIO Input Level
GPIO_GetInput(ARM_GPIO_Pin_t pin)136 static uint32_t GPIO_GetInput (ARM_GPIO_Pin_t pin) {
137 uint32_t val = 0U;
138
139 if (PIN_IS_AVAILABLE(pin)) {
140 }
141 return val;
142 }
143
144
145 // GPIO Driver access structure
146 ARM_DRIVER_GPIO Driver_GPIO0 = {
147 GPIO_Setup,
148 GPIO_SetDirection,
149 GPIO_SetOutputMode,
150 GPIO_SetPullResistor,
151 GPIO_SetEventTrigger,
152 GPIO_SetOutput,
153 GPIO_GetInput
154 };
155
