1 /**
2 ******************************************************************************
3 * @file stm32f1xx_ll_gpio.c
4 * @author MCD Application Team
5 * @brief GPIO LL module driver.
6 ******************************************************************************
7 * @attention
8 *
9 * Copyright (c) 2016 STMicroelectronics.
10 * All rights reserved.
11 *
12 * This software is licensed under terms that can be found in the LICENSE file
13 * in the root directory of this software component.
14 * If no LICENSE file comes with this software, it is provided AS-IS.
15 *
16 ******************************************************************************
17 */
18
19 #if defined(USE_FULL_LL_DRIVER)
20
21 /* Includes ------------------------------------------------------------------*/
22 #include "stm32f1xx_ll_gpio.h"
23 #include "stm32f1xx_ll_bus.h"
24 #ifdef USE_FULL_ASSERT
25 #include "stm32_assert.h"
26 #else
27 #define assert_param(expr) ((void)0U)
28 #endif
29
30 /** @addtogroup STM32F1xx_LL_Driver
31 * @{
32 */
33
34 #if defined (GPIOA) || defined (GPIOB) || defined (GPIOC) || defined (GPIOD) || defined (GPIOE) || defined (GPIOF) || defined (GPIOG)
35
36 /** @addtogroup GPIO_LL
37 * @{
38 */
39
40 /* Private types -------------------------------------------------------------*/
41 /* Private variables ---------------------------------------------------------*/
42 /* Private constants ---------------------------------------------------------*/
43 /* Private macros ------------------------------------------------------------*/
44 /** @addtogroup GPIO_LL_Private_Macros
45 * @{
46 */
47
48 #define IS_LL_GPIO_PIN(__VALUE__) ((((__VALUE__) & LL_GPIO_PIN_ALL)!= 0u) &&\
49 (((__VALUE__) & (~LL_GPIO_PIN_ALL))== 0u))
50
51 #define IS_LL_GPIO_MODE(__VALUE__) (((__VALUE__) == LL_GPIO_MODE_ANALOG) ||\
52 ((__VALUE__) == LL_GPIO_MODE_FLOATING) ||\
53 ((__VALUE__) == LL_GPIO_MODE_INPUT) ||\
54 ((__VALUE__) == LL_GPIO_MODE_OUTPUT) ||\
55 ((__VALUE__) == LL_GPIO_MODE_ALTERNATE))
56
57 #define IS_LL_GPIO_SPEED(__VALUE__) (((__VALUE__) == LL_GPIO_SPEED_FREQ_LOW) ||\
58 ((__VALUE__) == LL_GPIO_SPEED_FREQ_MEDIUM) ||\
59 ((__VALUE__) == LL_GPIO_SPEED_FREQ_HIGH))
60
61 #define IS_LL_GPIO_OUTPUT_TYPE(__VALUE__) (((__VALUE__) == LL_GPIO_OUTPUT_PUSHPULL) ||\
62 ((__VALUE__) == LL_GPIO_OUTPUT_OPENDRAIN))
63
64 #define IS_LL_GPIO_PULL(__VALUE__) (((__VALUE__) == LL_GPIO_PULL_DOWN) ||\
65 ((__VALUE__) == LL_GPIO_PULL_UP))
66
67 /**
68 * @}
69 */
70
71 /* Private function prototypes -----------------------------------------------*/
72
73 /* Exported functions --------------------------------------------------------*/
74 /** @addtogroup GPIO_LL_Exported_Functions
75 * @{
76 */
77
78 /** @addtogroup GPIO_LL_EF_Init
79 * @{
80 */
81
82 /**
83 * @brief De-initialize GPIO registers (Registers restored to their default values).
84 * @param GPIOx GPIO Port
85 * @retval An ErrorStatus enumeration value:
86 * - SUCCESS: GPIO registers are de-initialized
87 * - ERROR: Wrong GPIO Port
88 */
LL_GPIO_DeInit(GPIO_TypeDef * GPIOx)89 ErrorStatus LL_GPIO_DeInit(GPIO_TypeDef *GPIOx)
90 {
91 ErrorStatus status = SUCCESS;
92
93 /* Check the parameters */
94 assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
95
96 /* Force and Release reset on clock of GPIOx Port */
97 if (GPIOx == GPIOA)
98 {
99 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_GPIOA);
100 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_GPIOA);
101 }
102 else if (GPIOx == GPIOB)
103 {
104 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_GPIOB);
105 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_GPIOB);
106 }
107 else if (GPIOx == GPIOC)
108 {
109 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_GPIOC);
110 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_GPIOC);
111 }
112 else if (GPIOx == GPIOD)
113 {
114 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_GPIOD);
115 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_GPIOD);
116 }
117 #if defined(GPIOE)
118 else if (GPIOx == GPIOE)
119 {
120 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_GPIOE);
121 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_GPIOE);
122 }
123 #endif
124 #if defined(GPIOF)
125 else if (GPIOx == GPIOF)
126 {
127 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_GPIOF);
128 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_GPIOF);
129 }
130 #endif
131 #if defined(GPIOG)
132 else if (GPIOx == GPIOG)
133 {
134 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_GPIOG);
135 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_GPIOG);
136 }
137 #endif
138 else
139 {
140 status = ERROR;
141 }
142
143 return (status);
144 }
145
146 /**
147 * @brief Initialize GPIO registers according to the specified parameters in GPIO_InitStruct.
148 * @param GPIOx GPIO Port
149 * @param GPIO_InitStruct: pointer to a @ref LL_GPIO_InitTypeDef structure
150 * that contains the configuration information for the specified GPIO peripheral.
151 * @retval An ErrorStatus enumeration value:
152 * - SUCCESS: GPIO registers are initialized according to GPIO_InitStruct content
153 * - ERROR: Not applicable
154 */
LL_GPIO_Init(GPIO_TypeDef * GPIOx,LL_GPIO_InitTypeDef * GPIO_InitStruct)155 ErrorStatus LL_GPIO_Init(GPIO_TypeDef *GPIOx, LL_GPIO_InitTypeDef *GPIO_InitStruct)
156 {
157 uint32_t pinmask;
158 uint32_t pinpos;
159 uint32_t currentpin;
160
161 /* Check the parameters */
162 assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
163 assert_param(IS_LL_GPIO_PIN(GPIO_InitStruct->Pin));
164
165 /* ------------------------- Configure the port pins ---------------- */
166 /* Initialize pinpos on first pin set */
167
168 pinmask = ((GPIO_InitStruct->Pin) << GPIO_PIN_MASK_POS) >> GPIO_PIN_NB;
169 pinpos = POSITION_VAL(pinmask);
170
171 /* Configure the port pins */
172 while ((pinmask >> pinpos) != 0u)
173 {
174 /* skip if bit is not set */
175 if ((pinmask & (1u << pinpos)) != 0u)
176 {
177 /* Get current io position */
178 if (pinpos < GPIO_PIN_MASK_POS)
179 {
180 currentpin = (0x00000101uL << pinpos);
181 }
182 else
183 {
184 currentpin = ((0x00010001u << (pinpos - GPIO_PIN_MASK_POS)) | 0x04000000u);
185 }
186
187 if (GPIO_InitStruct->Mode == LL_GPIO_MODE_INPUT)
188 {
189 /* Check The Pull parameter */
190 assert_param(IS_LL_GPIO_PULL(GPIO_InitStruct->Pull));
191
192 /* Pull-up Pull-down resistor configuration*/
193 LL_GPIO_SetPinPull(GPIOx, currentpin, GPIO_InitStruct->Pull);
194 }
195
196 /* Check Pin Mode parameters */
197 assert_param(IS_LL_GPIO_MODE(GPIO_InitStruct->Mode));
198
199 /* Pin Mode configuration */
200 LL_GPIO_SetPinMode(GPIOx, currentpin, GPIO_InitStruct->Mode);
201
202 if ((GPIO_InitStruct->Mode == LL_GPIO_MODE_OUTPUT) || (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE))
203 {
204 /* Check speed and Output mode parameters */
205 assert_param(IS_LL_GPIO_SPEED(GPIO_InitStruct->Speed));
206 assert_param(IS_LL_GPIO_OUTPUT_TYPE(GPIO_InitStruct->OutputType));
207
208 /* Speed mode configuration */
209 LL_GPIO_SetPinSpeed(GPIOx, currentpin, GPIO_InitStruct->Speed);
210
211 /* Output mode configuration*/
212 LL_GPIO_SetPinOutputType(GPIOx, currentpin, GPIO_InitStruct->OutputType);
213 }
214 }
215 pinpos++;
216 }
217 return (SUCCESS);
218 }
219
220 /**
221 * @brief Set each @ref LL_GPIO_InitTypeDef field to default value.
222 * @param GPIO_InitStruct: pointer to a @ref LL_GPIO_InitTypeDef structure
223 * whose fields will be set to default values.
224 * @retval None
225 */
226
LL_GPIO_StructInit(LL_GPIO_InitTypeDef * GPIO_InitStruct)227 void LL_GPIO_StructInit(LL_GPIO_InitTypeDef *GPIO_InitStruct)
228 {
229 /* Reset GPIO init structure parameters values */
230 GPIO_InitStruct->Pin = LL_GPIO_PIN_ALL;
231 GPIO_InitStruct->Mode = LL_GPIO_MODE_FLOATING;
232 GPIO_InitStruct->Speed = LL_GPIO_SPEED_FREQ_LOW;
233 GPIO_InitStruct->OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
234 GPIO_InitStruct->Pull = LL_GPIO_PULL_DOWN;
235 }
236
237 /**
238 * @}
239 */
240
241 /**
242 * @}
243 */
244
245 /**
246 * @}
247 */
248
249 #endif /* defined (GPIOA) || defined (GPIOB) || defined (GPIOC) || defined (GPIOD) || defined (GPIOE) || defined (GPIOF) || defined (GPIOG) */
250
251 /**
252 * @}
253 */
254
255 #endif /* USE_FULL_LL_DRIVER */
256
257