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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_STM32F103_Keil/] [STM32F10xFWLib/] [src/] [stm32f10x_gpio.c] - Blame information for rev 582

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1 582 jeremybenn
/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
2
* File Name          : stm32f10x_gpio.c
3
* Author             : MCD Application Team
4
* Date First Issued  : 09/29/2006
5
* Description        : This file provides all the GPIO firmware functions.
6
********************************************************************************
7
* History:
8
* 04/02/2007: V0.2
9
* 02/05/2007: V0.1
10
* 09/29/2006: V0.01
11
********************************************************************************
12
* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
13
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
14
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
15
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
16
* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
17
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
18
*******************************************************************************/
19
 
20
/* Includes ------------------------------------------------------------------*/
21
#include "stm32f10x_gpio.h"
22
#include "stm32f10x_rcc.h"
23
 
24
/* Private typedef -----------------------------------------------------------*/
25
/* Private define ------------------------------------------------------------*/
26
/* ------------ RCC registers bit address in the alias region ----------- */
27
#define AFIO_OFFSET                 (AFIO_BASE - PERIPH_BASE)
28
 
29
/* --- EVENTCR Register ---*/
30
/* Alias word address of EVOE bit */
31
#define EVCR_OFFSET                 (AFIO_OFFSET + 0x00)
32
#define EVOE_BitNumber              ((u8)0x07)
33
#define EVCR_EVOE_BB                (PERIPH_BB_BASE + (EVCR_OFFSET * 32) + (EVOE_BitNumber * 4))
34
 
35
#define EVCR_PORTPINCONFIG_MASK     ((u16)0xFF80)
36
#define LSB_MASK                    ((u16)0xFFFF)
37
#define DBGAFR_POSITION_MASK        ((u32)0x000F0000)
38
#define DBGAFR_SWJCFG_MASK          ((u32)0xF8FFFFFF)
39
#define DBGAFR_LOCATION_MASK        ((u32)0x00200000)
40
#define DBGAFR_NUMBITS_MASK         ((u32)0x00100000)
41
 
42
/* Private macro -------------------------------------------------------------*/
43
/* Private variables ---------------------------------------------------------*/
44
/* Private function prototypes -----------------------------------------------*/
45
/* Private functions ---------------------------------------------------------*/
46
 
47
/*******************************************************************************
48
* Function Name  : GPIO_DeInit
49
* Description    : Deinitializes the GPIOx peripheral registers to their default
50
*                  reset values.
51
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
52
* Output         : None
53
* Return         : None
54
*******************************************************************************/
55
void GPIO_DeInit(GPIO_TypeDef* GPIOx)
56
{
57
  switch (*(u32*)&GPIOx)
58
  {
59
    case GPIOA_BASE:
60
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, ENABLE);
61
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, DISABLE);
62
      break;
63
 
64
    case GPIOB_BASE:
65
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, ENABLE);
66
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, DISABLE);
67
      break;
68
 
69
    case GPIOC_BASE:
70
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, ENABLE);
71
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, DISABLE);
72
      break;
73
 
74
    case GPIOD_BASE:
75
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, ENABLE);
76
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, DISABLE);
77
      break;
78
 
79
    case GPIOE_BASE:
80
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, ENABLE);
81
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, DISABLE);
82
      break;
83
 
84
    default:
85
      break;
86
  }
87
}
88
 
89
/*******************************************************************************
90
* Function Name  : GPIO_AFIODeInit
91
* Description    : Deinitializes the Alternate Functions (remap, event control
92
*                  and EXTI configuration) registers to their default reset
93
*                  values.
94
* Input          : None
95
* Output         : None
96
* Return         : None
97
*******************************************************************************/
98
void GPIO_AFIODeInit(void)
99
{
100
  RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, ENABLE);
101
  RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, DISABLE);
102
}
103
 
104
/*******************************************************************************
105
* Function Name  : GPIO_Init
106
* Description    : Initializes the GPIOx peripheral according to the specified
107
*                  parameters in the GPIO_InitStruct.
108
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
109
*                  - GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that
110
*                    contains the configuration information for the specified GPIO
111
*                    peripheral.
112
* Output         : None
113
* Return         : None
114
*******************************************************************************/
115
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
116
{
117
  u32 currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00;
118
  u32 tmpreg = 0x00, pinmask = 0x00;
119
 
120
  /* Check the parameters */
121
  assert(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
122
  assert(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
123
 
124
/*---------------------------- GPIO Mode Configuration -----------------------*/
125
  currentmode = ((u32)GPIO_InitStruct->GPIO_Mode) & ((u32)0x0F);
126
 
127
  if ((((u32)GPIO_InitStruct->GPIO_Mode) & ((u32)0x10)) != 0x00)
128
  {
129
    /* Check the parameters */
130
    assert(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));
131
    /* Output mode */
132
    currentmode |= (u32)GPIO_InitStruct->GPIO_Speed;
133
  }
134
 
135
/*---------------------------- GPIO CRL Configuration ------------------------*/
136
  /* Configure the eight low port pins */
137
  if (((u32)GPIO_InitStruct->GPIO_Pin & ((u32)0x00FF)) != 0x00)
138
  {
139
    tmpreg = GPIOx->CRL;
140
 
141
    for (pinpos = 0x00; pinpos < 0x08; pinpos++)
142
    {
143
      pos = ((u32)0x01) << pinpos;
144
      /* Get the port pins position */
145
      currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
146
 
147
      if (currentpin == pos)
148
      {
149
        pos = pinpos << 2;
150
        /* Clear the corresponding low control register bits */
151
        pinmask = ((u32)0x0F) << pos;
152
        tmpreg &= ~pinmask;
153
 
154
        /* Write the mode configuration in the corresponding bits */
155
        tmpreg |= (currentmode << pos);
156
 
157
        /* Reset the corresponding ODR bit */
158
        if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
159
        {
160
          GPIOx->BRR = (((u32)0x01) << pinpos);
161
        }
162
        /* Set the corresponding ODR bit */
163
        if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
164
        {
165
          GPIOx->BSRR = (((u32)0x01) << pinpos);
166
        }
167
      }
168
    }
169
    GPIOx->CRL = tmpreg;
170
    tmpreg = 0;
171
  }
172
 
173
/*---------------------------- GPIO CRH Configuration ------------------------*/
174
  /* Configure the eight high port pins */
175
  if (GPIO_InitStruct->GPIO_Pin > 0x00FF)
176
  {
177
    tmpreg = GPIOx->CRH;
178
    for (pinpos = 0x00; pinpos < 0x08; pinpos++)
179
    {
180
      pos = (((u32)0x01) << (pinpos + 0x08));
181
      /* Get the port pins position */
182
      currentpin = ((GPIO_InitStruct->GPIO_Pin) & pos);
183
      if (currentpin == pos)
184
      {
185
        pos = pinpos << 2;
186
        /* Clear the corresponding high control register bits */
187
        pinmask = ((u32)0x0F) << pos;
188
        tmpreg &= ~pinmask;
189
 
190
        /* Write the mode configuration in the corresponding bits */
191
        tmpreg |= (currentmode << pos);
192
 
193
        /* Reset the corresponding ODR bit */
194
        if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
195
        {
196
          GPIOx->BRR = (((u32)0x01) << (pinpos + 0x08));
197
        }
198
        /* Set the corresponding ODR bit */
199
        if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
200
        {
201
          GPIOx->BSRR = (((u32)0x01) << (pinpos + 0x08));
202
        }
203
      }
204
    }
205
    GPIOx->CRH = tmpreg;
206
  }
207
}
208
 
209
/*******************************************************************************
210
* Function Name  : GPIO_StructInit
211
* Description    : Fills each GPIO_InitStruct member with its default value.
212
* Input          : - GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure
213
*                    which will be initialized.
214
* Output         : None
215
* Return         : None
216
*******************************************************************************/
217
void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct)
218
{
219
  /* Reset GPIO init structure parameters values */
220
  GPIO_InitStruct->GPIO_Pin  = GPIO_Pin_All;
221
  GPIO_InitStruct->GPIO_Speed = GPIO_Speed_2MHz;
222
  GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN_FLOATING;
223
}
224
 
225
/*******************************************************************************
226
* Function Name  : GPIO_ReadInputDataBit
227
* Description    : Reads the specified input port pin.
228
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
229
*                : - GPIO_Pin:  specifies the port bit to read.
230
*                    This parameter can be GPIO_Pin_x where x can be (0..15).
231
* Output         : None
232
* Return         : The input port pin value.
233
*******************************************************************************/
234
u8 GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
235
{
236
  u8 bitstatus = 0x00;
237
 
238
  /* Check the parameters */
239
  assert(IS_GPIO_PIN(GPIO_Pin));
240
 
241
  if ((GPIOx->IDR & GPIO_Pin) != (u32)Bit_RESET)
242
  {
243
    bitstatus = (u8)Bit_SET;
244
  }
245
  else
246
  {
247
    bitstatus = (u8)Bit_RESET;
248
  }
249
  return bitstatus;
250
}
251
 
252
/*******************************************************************************
253
* Function Name  : GPIO_ReadInputData
254
* Description    : Reads the specified GPIO input data port.
255
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
256
* Output         : None
257
* Return         : GPIO input data port value.
258
*******************************************************************************/
259
u16 GPIO_ReadInputData(GPIO_TypeDef* GPIOx)
260
{
261
  return ((u16)GPIOx->IDR);
262
}
263
 
264
/*******************************************************************************
265
* Function Name  : GPIO_ReadOutputDataBit
266
* Description    : Reads the specified output data port bit.
267
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
268
*                : - GPIO_Pin:  specifies the port bit to read.
269
*                    This parameter can be GPIO_Pin_x where x can be (0..15).
270
* Output         : None
271
* Return         : The output port pin value.
272
*******************************************************************************/
273
u8 GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
274
{
275
  u8 bitstatus = 0x00;
276
 
277
  /* Check the parameters */
278
  assert(IS_GPIO_PIN(GPIO_Pin));
279
 
280
  if ((GPIOx->ODR & GPIO_Pin) != (u32)Bit_RESET)
281
  {
282
    bitstatus = (u8)Bit_SET;
283
  }
284
  else
285
  {
286
    bitstatus = (u8)Bit_RESET;
287
  }
288
  return bitstatus;
289
}
290
 
291
/*******************************************************************************
292
* Function Name  : GPIO_ReadOutputData
293
* Description    : Reads the specified GPIO output data port.
294
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
295
* Output         : None
296
* Return         : GPIO output data port value.
297
*******************************************************************************/
298
u16 GPIO_ReadOutputData(GPIO_TypeDef* GPIOx)
299
{
300
  return ((u16)GPIOx->ODR);
301
}
302
 
303
/*******************************************************************************
304
* Function Name  : GPIO_WriteBit
305
* Description    : Sets or clears the selected data port bit.
306
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
307
*                  - GPIO_Pin: specifies the port bit to be written.
308
*                    This parameter can be GPIO_Pin_x where x can be (0..15).
309
*                  - BitVal: specifies the value to be written to the selected bit.
310
*                    This parameter can be one of the BitAction enum values:
311
*                       - Bit_RESET: to clear the port pin
312
*                       - Bit_SET: to set the port pin
313
* Output         : None
314
* Return         : None
315
*******************************************************************************/
316
void GPIO_WriteBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin, BitAction BitVal)
317
{
318
  /* Check the parameters */
319
  assert(IS_GPIO_PIN(GPIO_Pin));
320
  assert(IS_GPIO_BIT_ACTION(BitVal));
321
 
322
  if (BitVal != Bit_RESET)
323
  {
324
    GPIOx->BSRR = GPIO_Pin;
325
  }
326
  else
327
  {
328
    GPIOx->BRR = GPIO_Pin;
329
  }
330
}
331
 
332
/*******************************************************************************
333
* Function Name  : GPIO_Write
334
* Description    : Writes data to the specified GPIO data port.
335
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
336
*                  - PortVal: specifies the value to be written to the port output
337
*                    data register.
338
* Output         : None
339
* Return         : None
340
*******************************************************************************/
341
void GPIO_Write(GPIO_TypeDef* GPIOx, u16 PortVal)
342
{
343
  GPIOx->ODR = PortVal;
344
}
345
 
346
/*******************************************************************************
347
* Function Name  : GPIO_PinLockConfig
348
* Description    : Locks GPIO Pins configuration registers.
349
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
350
*                  - GPIO_Pin: specifies the port bit to be written.
351
*                    This parameter can be GPIO_Pin_x where x can be (0..15).
352
* Output         : None
353
* Return         : None
354
*******************************************************************************/
355
void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
356
{
357
  u32 tmp = 0x00010000;
358
 
359
  /* Check the parameters */
360
  assert(IS_GPIO_PIN(GPIO_Pin));
361
 
362
  tmp |= GPIO_Pin;
363
  /* Set LCKK bit */
364
  GPIOx->LCKR = tmp;
365
  /* Reset LCKK bit */
366
  GPIOx->LCKR =  GPIO_Pin;
367
  /* Set LCKK bit */
368
  GPIOx->LCKR = tmp;
369
  /* Read LCKK bit*/
370
  tmp = GPIOx->LCKR;
371
  /* Read LCKK bit*/
372
  tmp = GPIOx->LCKR;
373
}
374
 
375
/*******************************************************************************
376
* Function Name  : GPIO_EventOutputConfig
377
* Description    : Selects the GPIO pin used as Event output.
378
* Input          : - GPIO_PortSource: selects the GPIO port to be used as source
379
*                    for Event output.
380
*                    This parameter can be GPIO_PortSourceGPIOx where x can be
381
*                    (A..E).
382
*                  - GPIO_PinSource: specifies the pin for the Event output.
383
*                    This parameter can be GPIO_PinSourcex where x can be (0..15).
384
* Output         : None
385
* Return         : None
386
*******************************************************************************/
387
void GPIO_EventOutputConfig(u8 GPIO_PortSource, u8 GPIO_PinSource)
388
{
389
  u32 tmpreg = 0x00;
390
 
391
  /* Check the parameters */
392
  assert(IS_GPIO_PORT_SOURCE(GPIO_PortSource));
393
  assert(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
394
 
395
  tmpreg = AFIO->EVCR;
396
  /* Clear the PORT[6:4] and PIN[3:0] bits */
397
  tmpreg &= EVCR_PORTPINCONFIG_MASK;
398
  tmpreg |= (u32)GPIO_PortSource << 0x04;
399
  tmpreg |= GPIO_PinSource;
400
 
401
  AFIO->EVCR = tmpreg;
402
}
403
 
404
/*******************************************************************************
405
* Function Name  : GPIO_EventOutputCmd
406
* Description    : Enables or disables the Event Output.
407
* Input          : - NewState: new state of the Event output.
408
*                    This parameter can be: ENABLE or DISABLE.
409
* Output         : None
410
* Return         : None
411
*******************************************************************************/
412
void GPIO_EventOutputCmd(FunctionalState NewState)
413
{
414
  /* Check the parameters */
415
  assert(IS_FUNCTIONAL_STATE(NewState));
416
 
417
  *(vu32 *) EVCR_EVOE_BB = (u32)NewState;
418
}
419
 
420
/*******************************************************************************
421
* Function Name  : GPIO_PinRemapConfig
422
* Description    : Changes the mapping of the specified pin.
423
* Input          : - GPIO_Remap: selects the pin to remap.
424
*                    This parameter can be one of the following values:
425
*                       - GPIO_Remap_SPI1
426
*                       - GPIO_Remap_I2C1
427
*                       - GPIO_Remap_USART1
428
*                       - GPIO_Remap_USART2
429
*                       - GPIO_PartialRemap_USART3
430
*                       - GPIO_FullRemap_USART3
431
*                       - GPIO_PartialRemap_TIM1
432
*                       - GPIO_FullRemap_TIM1
433
*                       - GPIO_PartialRemap1_TIM2
434
*                       - GPIO_PartialRemap2_TIM2
435
*                       - GPIO_FullRemap_TIM2
436
*                       - GPIO_PartialRemap_TIM3
437
*                       - GPIO_FullRemap_TIM3
438
*                       - GPIO_Remap_TIM4
439
*                       - GPIO_Remap1_CAN
440
*                       - GPIO_Remap2_CAN
441
*                       - GPIO_Remap_PD01
442
*                       - GPIO_Remap_SWJ_NoJTRST
443
*                       - GPIO_Remap_SWJ_JTAGDisable
444
*                       - GPIO_Remap_SWJ_Disable
445
*                  - NewState: new state of the port pin remapping.
446
*                    This parameter can be: ENABLE or DISABLE.
447
* Output         : None
448
* Return         : None
449
*******************************************************************************/
450
void GPIO_PinRemapConfig(u32 GPIO_Remap, FunctionalState NewState)
451
{
452
  u32 tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00;
453
 
454
  /* Check the parameters */
455
  assert(IS_GPIO_REMAP(GPIO_Remap));
456
  assert(IS_FUNCTIONAL_STATE(NewState));
457
 
458
  tmpreg = AFIO->MAPR;
459
 
460
  tmpmask = (GPIO_Remap & DBGAFR_POSITION_MASK) >> 0x10;
461
  tmp = GPIO_Remap & LSB_MASK;
462
 
463
  if ((GPIO_Remap & DBGAFR_LOCATION_MASK) == DBGAFR_LOCATION_MASK)
464
  {
465
    tmpreg &= DBGAFR_SWJCFG_MASK;
466
  }
467
  else if ((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK)
468
  {
469
    tmp1 = ((u32)0x03) << tmpmask;
470
    tmpreg &= ~tmp1;
471
  }
472
  else
473
  {
474
    tmpreg &= ~tmp;
475
  }
476
 
477
  if (NewState != DISABLE)
478
  {
479
    if ((GPIO_Remap & DBGAFR_LOCATION_MASK) == DBGAFR_LOCATION_MASK)
480
    {
481
      tmpreg |= (tmp << 0x10);
482
    }
483
    else
484
    {
485
      tmpreg |= tmp;
486
    }
487
  }
488
  AFIO->MAPR = tmpreg;
489
}
490
 
491
/*******************************************************************************
492
* Function Name  : GPIO_EXTILineConfig
493
* Description    : Selects the GPIO pin used as EXTI Line.
494
* Input          : - GPIO_PortSource: selects the GPIO port to be used as
495
*                    source for EXTI lines.
496
*                  - GPIO_PinSource: specifies the EXTI line to be configured.
497
*                   This parameter can be GPIO_PinSourcex where x can be (0..15).
498
* Output         : None
499
* Return         : None
500
*******************************************************************************/
501
void GPIO_EXTILineConfig(u8 GPIO_PortSource, u8 GPIO_PinSource)
502
{
503
  u32 tmp = 0x00;
504
 
505
  /* Check the parameters */
506
  assert(IS_GPIO_PORT_SOURCE(GPIO_PortSource));
507
  assert(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
508
 
509
  tmp = ((u32)0x0F) << (0x04 * (GPIO_PinSource & (u8)0x03));
510
 
511
  AFIO->EXTICR[GPIO_PinSource >> 0x02] &= ~tmp;
512
  AFIO->EXTICR[GPIO_PinSource >> 0x02] |= (((u32)GPIO_PortSource) << (0x04 * (GPIO_PinSource & (u8)0x03)));
513
}
514
 
515
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/

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