1 /**
2 ******************************************************************************
3 * @file stm32l1xx_ll_gpio.c
4 * @author MCD Application Team
5 * @brief GPIO LL module driver.
6 ******************************************************************************
7 * @attention
8 *
9 * <h2><center>© Copyright (c) 2017 STMicroelectronics.
10 * All rights reserved.</center></h2>
11 *
12 * This software component is licensed by ST under BSD 3-Clause license,
13 * the "License"; You may not use this file except in compliance with the
14 * License. You may obtain a copy of the License at:
15 * opensource.org/licenses/BSD-3-Clause
16 *
17 ******************************************************************************
18 */
19 #if defined(USE_FULL_LL_DRIVER)
20
21 /* Includes ------------------------------------------------------------------*/
22 #include "stm32l1xx_ll_gpio.h"
23 #include "stm32l1xx_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 STM32L1xx_LL_Driver
31 * @{
32 */
33
34 #if defined (GPIOA) || defined (GPIOB) || defined (GPIOC) || defined (GPIOD) || defined (GPIOE) || defined (GPIOF) || defined (GPIOG) || defined (GPIOH)
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 #define IS_LL_GPIO_PIN(__VALUE__) (((0x00000000U) < (__VALUE__)) && ((__VALUE__) <= (LL_GPIO_PIN_ALL)))
48
49 #define IS_LL_GPIO_MODE(__VALUE__) (((__VALUE__) == LL_GPIO_MODE_INPUT) ||\
50 ((__VALUE__) == LL_GPIO_MODE_OUTPUT) ||\
51 ((__VALUE__) == LL_GPIO_MODE_ALTERNATE) ||\
52 ((__VALUE__) == LL_GPIO_MODE_ANALOG))
53
54 #define IS_LL_GPIO_OUTPUT_TYPE(__VALUE__) (((__VALUE__) == LL_GPIO_OUTPUT_PUSHPULL) ||\
55 ((__VALUE__) == LL_GPIO_OUTPUT_OPENDRAIN))
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 ((__VALUE__) == LL_GPIO_SPEED_FREQ_VERY_HIGH))
61
62 #define IS_LL_GPIO_PULL(__VALUE__) (((__VALUE__) == LL_GPIO_PULL_NO) ||\
63 ((__VALUE__) == LL_GPIO_PULL_UP) ||\
64 ((__VALUE__) == LL_GPIO_PULL_DOWN))
65
66 #define IS_LL_GPIO_ALTERNATE(__VALUE__) (((__VALUE__) == LL_GPIO_AF_0 ) ||\
67 ((__VALUE__) == LL_GPIO_AF_1 ) ||\
68 ((__VALUE__) == LL_GPIO_AF_2 ) ||\
69 ((__VALUE__) == LL_GPIO_AF_3 ) ||\
70 ((__VALUE__) == LL_GPIO_AF_4 ) ||\
71 ((__VALUE__) == LL_GPIO_AF_5 ) ||\
72 ((__VALUE__) == LL_GPIO_AF_6 ) ||\
73 ((__VALUE__) == LL_GPIO_AF_7 ) ||\
74 ((__VALUE__) == LL_GPIO_AF_8 ) ||\
75 ((__VALUE__) == LL_GPIO_AF_9 ) ||\
76 ((__VALUE__) == LL_GPIO_AF_10 ) ||\
77 ((__VALUE__) == LL_GPIO_AF_11 ) ||\
78 ((__VALUE__) == LL_GPIO_AF_12 ) ||\
79 ((__VALUE__) == LL_GPIO_AF_13 ) ||\
80 ((__VALUE__) == LL_GPIO_AF_14 ) ||\
81 ((__VALUE__) == LL_GPIO_AF_15 ))
82 /**
83 * @}
84 */
85
86 /* Private function prototypes -----------------------------------------------*/
87
88 /* Exported functions --------------------------------------------------------*/
89 /** @addtogroup GPIO_LL_Exported_Functions
90 * @{
91 */
92
93 /** @addtogroup GPIO_LL_EF_Init
94 * @{
95 */
96
97 /**
98 * @brief De-initialize GPIO registers (Registers restored to their default values).
99 * @param GPIOx GPIO Port
100 * @retval An ErrorStatus enumeration value:
101 * - SUCCESS: GPIO registers are de-initialized
102 * - ERROR: Wrong GPIO Port
103 */
LL_GPIO_DeInit(GPIO_TypeDef * GPIOx)104 ErrorStatus LL_GPIO_DeInit(GPIO_TypeDef *GPIOx)
105 {
106 ErrorStatus status = SUCCESS;
107
108 /* Check the parameters */
109 assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
110
111 /* Force and Release reset on clock of GPIOx Port */
112 if (GPIOx == GPIOA)
113 {
114 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_GPIOA);
115 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_GPIOA);
116 }
117 else if (GPIOx == GPIOB)
118 {
119 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_GPIOB);
120 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_GPIOB);
121 }
122 else if (GPIOx == GPIOC)
123 {
124 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_GPIOC);
125 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_GPIOC);
126 }
127 #if defined(GPIOD)
128 else if (GPIOx == GPIOD)
129 {
130 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_GPIOD);
131 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_GPIOD);
132 }
133 #endif /* GPIOD */
134 #if defined(GPIOE)
135 else if (GPIOx == GPIOE)
136 {
137 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_GPIOE);
138 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_GPIOE);
139 }
140 #endif /* GPIOE */
141 #if defined(GPIOF)
142 else if (GPIOx == GPIOF)
143 {
144 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_GPIOF);
145 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_GPIOF);
146 }
147 #endif /* GPIOF */
148 #if defined(GPIOG)
149 else if (GPIOx == GPIOG)
150 {
151 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_GPIOG);
152 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_GPIOG);
153 }
154 #endif /* GPIOG */
155 #if defined(GPIOH)
156 else if (GPIOx == GPIOH)
157 {
158 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_GPIOH);
159 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_GPIOH);
160 }
161 #endif /* GPIOH */
162 else
163 {
164 status = ERROR;
165 }
166
167 return (status);
168 }
169
170 /**
171 * @brief Initialize GPIO registers according to the specified parameters in GPIO_InitStruct.
172 * @param GPIOx GPIO Port
173 * @param GPIO_InitStruct pointer to a @ref LL_GPIO_InitTypeDef structure
174 * that contains the configuration information for the specified GPIO peripheral.
175 * @retval An ErrorStatus enumeration value:
176 * - SUCCESS: GPIO registers are initialized according to GPIO_InitStruct content
177 * - ERROR: Not applicable
178 */
LL_GPIO_Init(GPIO_TypeDef * GPIOx,LL_GPIO_InitTypeDef * GPIO_InitStruct)179 ErrorStatus LL_GPIO_Init(GPIO_TypeDef *GPIOx, LL_GPIO_InitTypeDef *GPIO_InitStruct)
180 {
181 uint32_t pinpos = 0x00000000U;
182 uint32_t currentpin = 0x00000000U;
183
184 /* Check the parameters */
185 assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
186 assert_param(IS_LL_GPIO_PIN(GPIO_InitStruct->Pin));
187 assert_param(IS_LL_GPIO_MODE(GPIO_InitStruct->Mode));
188 assert_param(IS_LL_GPIO_PULL(GPIO_InitStruct->Pull));
189
190 /* ------------------------- Configure the port pins ---------------- */
191 /* Initialize pinpos on first pin set */
192 pinpos = POSITION_VAL(GPIO_InitStruct->Pin);
193
194 /* Configure the port pins */
195 while (((GPIO_InitStruct->Pin) >> pinpos) != 0x00000000U)
196 {
197 /* Get current io position */
198 currentpin = (GPIO_InitStruct->Pin) & (0x00000001U << pinpos);
199
200 if (currentpin)
201 {
202
203 if ((GPIO_InitStruct->Mode == LL_GPIO_MODE_OUTPUT) || (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE))
204 {
205 /* Check Speed mode parameters */
206 assert_param(IS_LL_GPIO_SPEED(GPIO_InitStruct->Speed));
207
208 /* Speed mode configuration */
209 LL_GPIO_SetPinSpeed(GPIOx, currentpin, GPIO_InitStruct->Speed);
210
211 /* Check Output mode parameters */
212 assert_param(IS_LL_GPIO_OUTPUT_TYPE(GPIO_InitStruct->OutputType));
213
214 /* Output mode configuration*/
215 LL_GPIO_SetPinOutputType(GPIOx, currentpin, GPIO_InitStruct->OutputType);
216 }
217
218 /* Pull-up Pull down resistor configuration*/
219 LL_GPIO_SetPinPull(GPIOx, currentpin, GPIO_InitStruct->Pull);
220
221 if (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE)
222 {
223 /* Check Alternate parameter */
224 assert_param(IS_LL_GPIO_ALTERNATE(GPIO_InitStruct->Alternate));
225
226 /* Speed mode configuration */
227 if (POSITION_VAL(currentpin) < 0x00000008U)
228 {
229 LL_GPIO_SetAFPin_0_7(GPIOx, currentpin, GPIO_InitStruct->Alternate);
230 }
231 else
232 {
233 LL_GPIO_SetAFPin_8_15(GPIOx, currentpin, GPIO_InitStruct->Alternate);
234 }
235 }
236
237 /* Pin Mode configuration */
238 LL_GPIO_SetPinMode(GPIOx, currentpin, GPIO_InitStruct->Mode);
239 }
240 pinpos++;
241 }
242
243 return (SUCCESS);
244 }
245
246 /**
247 * @brief Set each @ref LL_GPIO_InitTypeDef field to default value.
248 * @param GPIO_InitStruct: pointer to a @ref LL_GPIO_InitTypeDef structure
249 * whose fields will be set to default values.
250 * @retval None
251 */
252
LL_GPIO_StructInit(LL_GPIO_InitTypeDef * GPIO_InitStruct)253 void LL_GPIO_StructInit(LL_GPIO_InitTypeDef *GPIO_InitStruct)
254 {
255 /* Reset GPIO init structure parameters values */
256 GPIO_InitStruct->Pin = LL_GPIO_PIN_ALL;
257 GPIO_InitStruct->Mode = LL_GPIO_MODE_ANALOG;
258 GPIO_InitStruct->Speed = LL_GPIO_SPEED_FREQ_LOW;
259 GPIO_InitStruct->OutputType = LL_GPIO_OUTPUT_PUSHPULL;
260 GPIO_InitStruct->Pull = LL_GPIO_PULL_NO;
261 GPIO_InitStruct->Alternate = LL_GPIO_AF_0;
262 }
263
264 /**
265 * @}
266 */
267
268 /**
269 * @}
270 */
271
272 /**
273 * @}
274 */
275
276 #endif /* defined (GPIOA) || defined (GPIOB) || defined (GPIOC) || defined (GPIOD) || defined (GPIOE) || defined (GPIOF) || defined (GPIOG) || defined (GPIOH) */
277
278 /**
279 * @}
280 */
281
282 #endif /* USE_FULL_LL_DRIVER */
283
284 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
285