1 /********************************** (C) COPYRIGHT  *******************************
2  * File Name          : ch32v10x_gpio.c
3  * Author             : WCH
4  * Version            : V1.0.0
5  * Date               : 2020/04/30
6  * Description        : This file provides all the GPIO firmware functions.
7  * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
8  * SPDX-License-Identifier: Apache-2.0
9  *******************************************************************************/
10 #include "ch32v10x_gpio.h"
11 #include "ch32v10x_rcc.h"
12 
13 /* MASK */
14 #define ECR_PORTPINCONFIG_MASK    ((uint16_t)0xFF80)
15 #define LSB_MASK                  ((uint16_t)0xFFFF)
16 #define DBGAFR_POSITION_MASK      ((uint32_t)0x000F0000)
17 #define DBGAFR_SWJCFG_MASK        ((uint32_t)0xF0FFFFFF)
18 #define DBGAFR_LOCATION_MASK      ((uint32_t)0x00200000)
19 #define DBGAFR_NUMBITS_MASK       ((uint32_t)0x00100000)
20 
21 /*********************************************************************
22  * @fn      GPIO_DeInit
23  *
24  * @brief   Deinitializes the GPIOx peripheral registers to their default
25  *        reset values.
26  *
27  * @param   GPIOx - where x can be (A..G) to select the GPIO peripheral.
28  *
29  * @return  none
30  */
GPIO_DeInit(GPIO_TypeDef * GPIOx)31 void GPIO_DeInit(GPIO_TypeDef *GPIOx)
32 {
33     if(GPIOx == GPIOA)
34     {
35         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, ENABLE);
36         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOA, DISABLE);
37     }
38     else if(GPIOx == GPIOB)
39     {
40         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, ENABLE);
41         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB, DISABLE);
42     }
43     else if(GPIOx == GPIOC)
44     {
45         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, ENABLE);
46         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOC, DISABLE);
47     }
48     else if(GPIOx == GPIOD)
49     {
50         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, ENABLE);
51         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOD, DISABLE);
52     }
53     else if(GPIOx == GPIOE)
54     {
55         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, ENABLE);
56         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOE, DISABLE);
57     }
58     else if(GPIOx == GPIOF)
59     {
60         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, ENABLE);
61         RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOF, DISABLE);
62     }
63     else
64     {
65         if(GPIOx == GPIOG)
66         {
67             RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, ENABLE);
68             RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOG, DISABLE);
69         }
70     }
71 }
72 
73 /*********************************************************************
74  * @fn      GPIO_AFIODeInit
75  *
76  * @brief   Deinitializes the Alternate Functions (remap, event control
77  *        and EXTI configuration) registers to their default reset values.
78  *
79  * @return  none
80  */
GPIO_AFIODeInit(void)81 void GPIO_AFIODeInit(void)
82 {
83     RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, ENABLE);
84     RCC_APB2PeriphResetCmd(RCC_APB2Periph_AFIO, DISABLE);
85 }
86 
87 /*********************************************************************
88  * @fn      GPIO_Init
89  *
90  * @brief   GPIOx - where x can be (A..G) to select the GPIO peripheral.
91  *
92  * @param   GPIO_InitStruct - pointer to a GPIO_InitTypeDef structure that
93  *        contains the configuration information for the specified GPIO peripheral.
94  *
95  * @return  none
96  */
GPIO_Init(GPIO_TypeDef * GPIOx,GPIO_InitTypeDef * GPIO_InitStruct)97 void GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_InitStruct)
98 {
99     uint32_t currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00;
100     uint32_t tmpreg = 0x00, pinmask = 0x00;
101 
102     currentmode = ((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x0F);
103 
104     if((((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x10)) != 0x00)
105     {
106         currentmode |= (uint32_t)GPIO_InitStruct->GPIO_Speed;
107     }
108 
109     if(((uint32_t)GPIO_InitStruct->GPIO_Pin & ((uint32_t)0x00FF)) != 0x00)
110     {
111         tmpreg = GPIOx->CFGLR;
112 
113         for(pinpos = 0x00; pinpos < 0x08; pinpos++)
114         {
115             pos = ((uint32_t)0x01) << pinpos;
116             currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
117 
118             if(currentpin == pos)
119             {
120                 pos = pinpos << 2;
121                 pinmask = ((uint32_t)0x0F) << pos;
122                 tmpreg &= ~pinmask;
123                 tmpreg |= (currentmode << pos);
124 
125                 if(GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
126                 {
127                     GPIOx->BCR = (((uint32_t)0x01) << pinpos);
128                 }
129                 else
130                 {
131                     if(GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
132                     {
133                         GPIOx->BSHR = (((uint32_t)0x01) << pinpos);
134                     }
135                 }
136             }
137         }
138         GPIOx->CFGLR = tmpreg;
139     }
140 
141     if(GPIO_InitStruct->GPIO_Pin > 0x00FF)
142     {
143         tmpreg = GPIOx->CFGHR;
144 
145         for(pinpos = 0x00; pinpos < 0x08; pinpos++)
146         {
147             pos = (((uint32_t)0x01) << (pinpos + 0x08));
148             currentpin = ((GPIO_InitStruct->GPIO_Pin) & pos);
149 
150             if(currentpin == pos)
151             {
152                 pos = pinpos << 2;
153                 pinmask = ((uint32_t)0x0F) << pos;
154                 tmpreg &= ~pinmask;
155                 tmpreg |= (currentmode << pos);
156 
157                 if(GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPD)
158                 {
159                     GPIOx->BCR = (((uint32_t)0x01) << (pinpos + 0x08));
160                 }
161 
162                 if(GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IPU)
163                 {
164                     GPIOx->BSHR = (((uint32_t)0x01) << (pinpos + 0x08));
165                 }
166             }
167         }
168         GPIOx->CFGHR = tmpreg;
169     }
170 }
171 
172 /*********************************************************************
173  * @fn      GPIO_StructInit
174  *
175  * @brief   Fills each GPIO_InitStruct member with its default
176  *
177  * @param   GPIO_InitStruct - pointer to a GPIO_InitTypeDef structure
178  *      which will be initialized.
179  *
180  * @return  none
181  */
GPIO_StructInit(GPIO_InitTypeDef * GPIO_InitStruct)182 void GPIO_StructInit(GPIO_InitTypeDef *GPIO_InitStruct)
183 {
184     GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All;
185     GPIO_InitStruct->GPIO_Speed = GPIO_Speed_2MHz;
186     GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN_FLOATING;
187 }
188 
189 /*********************************************************************
190  * @fn      GPIO_ReadInputDataBit
191  *
192  * @brief   GPIOx - where x can be (A..G) to select the GPIO peripheral.
193  *
194  * @param    GPIO_Pin - specifies the port bit to read.
195  *             This parameter can be GPIO_Pin_x where x can be (0..15).
196  *
197  * @return  The input port pin value.
198  */
GPIO_ReadInputDataBit(GPIO_TypeDef * GPIOx,uint16_t GPIO_Pin)199 uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
200 {
201     uint8_t bitstatus = 0x00;
202 
203     if((GPIOx->INDR & GPIO_Pin) != (uint32_t)Bit_RESET)
204     {
205         bitstatus = (uint8_t)Bit_SET;
206     }
207     else
208     {
209         bitstatus = (uint8_t)Bit_RESET;
210     }
211 
212     return bitstatus;
213 }
214 
215 /*********************************************************************
216  * @fn      GPIO_ReadInputData
217  *
218  * @brief   Reads the specified GPIO input data port.
219  *
220  * @param   GPIOx: where x can be (A..G) to select the GPIO peripheral.
221  *
222  * @return  The input port pin value.
223  */
GPIO_ReadInputData(GPIO_TypeDef * GPIOx)224 uint16_t GPIO_ReadInputData(GPIO_TypeDef *GPIOx)
225 {
226     return ((uint16_t)GPIOx->INDR);
227 }
228 
229 /*********************************************************************
230  * @fn      GPIO_ReadOutputDataBit
231  *
232  * @brief   Reads the specified output data port bit.
233  *
234  * @param   GPIOx - where x can be (A..G) to select the GPIO peripheral.
235  *          GPIO_Pin - specifies the port bit to read.
236  *            This parameter can be GPIO_Pin_x where x can be (0..15).
237  *
238  * @return  none
239  */
GPIO_ReadOutputDataBit(GPIO_TypeDef * GPIOx,uint16_t GPIO_Pin)240 uint8_t GPIO_ReadOutputDataBit(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
241 {
242     uint8_t bitstatus = 0x00;
243 
244     if((GPIOx->OUTDR & GPIO_Pin) != (uint32_t)Bit_RESET)
245     {
246         bitstatus = (uint8_t)Bit_SET;
247     }
248     else
249     {
250         bitstatus = (uint8_t)Bit_RESET;
251     }
252 
253     return bitstatus;
254 }
255 
256 /*********************************************************************
257  * @fn      GPIO_ReadOutputData
258  *
259  * @brief   Reads the specified GPIO output data port.
260  *
261  * @param   GPIOx - where x can be (A..G) to select the GPIO peripheral.
262  *
263  * @return  GPIO output port pin value.
264  */
GPIO_ReadOutputData(GPIO_TypeDef * GPIOx)265 uint16_t GPIO_ReadOutputData(GPIO_TypeDef *GPIOx)
266 {
267     return ((uint16_t)GPIOx->OUTDR);
268 }
269 
270 /*********************************************************************
271  * @fn      GPIO_SetBits
272  *
273  * @brief   Sets the selected data port bits.
274  *
275  * @param   GPIOx - where x can be (A..G) to select the GPIO peripheral.
276  *          GPIO_Pin - specifies the port bits to be written.
277  *            This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
278  *
279  * @return  none
280  */
GPIO_SetBits(GPIO_TypeDef * GPIOx,uint16_t GPIO_Pin)281 void GPIO_SetBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
282 {
283     GPIOx->BSHR = GPIO_Pin;
284 }
285 
286 /*********************************************************************
287  * @fn      GPIO_ResetBits
288  *
289  * @brief   Clears the selected data port bits.
290  *
291  * @param   GPIOx - where x can be (A..G) to select the GPIO peripheral.
292  *          GPIO_Pin - specifies the port bits to be written.
293  *            This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
294  *
295  * @return  none
296  */
GPIO_ResetBits(GPIO_TypeDef * GPIOx,uint16_t GPIO_Pin)297 void GPIO_ResetBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
298 {
299     GPIOx->BCR = GPIO_Pin;
300 }
301 
302 /*********************************************************************
303  * @fn      GPIO_WriteBit
304  *
305  * @brief   Sets or clears the selected data port bit.
306  *
307  * @param   GPIO_Pin - specifies the port bit to be written.
308  *            This parameter can be one of GPIO_Pin_x where x can be (0..15).
309  *          BitVal - specifies the value to be written to the selected bit.
310  *            Bit_SetL - to clear the port pin.
311  *            Bit_SetH - to set the port pin.
312  *
313  * @return  none
314  */
GPIO_WriteBit(GPIO_TypeDef * GPIOx,uint16_t GPIO_Pin,BitAction BitVal)315 void GPIO_WriteBit(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin, BitAction BitVal)
316 {
317     if(BitVal != Bit_RESET)
318     {
319         GPIOx->BSHR = GPIO_Pin;
320     }
321     else
322     {
323         GPIOx->BCR = GPIO_Pin;
324     }
325 }
326 
327 /*********************************************************************
328  * @fn      GPIO_Write
329  *
330  * @brief   Writes data to the specified GPIO data port.
331  *
332  * @param   GPIOx - where x can be (A..G) to select the GPIO peripheral.
333  *          PortVal - specifies the value to be written to the port output data register.
334  *
335  * @return  none
336  */
GPIO_Write(GPIO_TypeDef * GPIOx,uint16_t PortVal)337 void GPIO_Write(GPIO_TypeDef *GPIOx, uint16_t PortVal)
338 {
339     GPIOx->OUTDR = PortVal;
340 }
341 
342 /*********************************************************************
343  * @fn      GPIO_PinLockConfig
344  *
345  * @brief   Locks GPIO Pins configuration registers.
346  *
347  * @param   GPIOx - where x can be (A..G) to select the GPIO peripheral.
348  *          GPIO_Pin - specifies the port bit to be written.
349  *            This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
350  *
351  * @return  none
352  */
GPIO_PinLockConfig(GPIO_TypeDef * GPIOx,uint16_t GPIO_Pin)353 void GPIO_PinLockConfig(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
354 {
355     uint32_t tmp = 0x00010000;
356 
357     tmp |= GPIO_Pin;
358     GPIOx->LCKR = tmp;
359     GPIOx->LCKR = GPIO_Pin;
360     GPIOx->LCKR = tmp;
361     tmp = GPIOx->LCKR;
362     tmp = GPIOx->LCKR;
363 }
364 
365 /*********************************************************************
366  * @fn      GPIO_EventOutputConfig
367  *
368  * @brief   Selects the GPIO pin used as Event output.
369  *
370  * @param   GPIO_PortSource - selects the GPIO port to be used as source
371  *        for Event output.
372  *            This parameter can be GPIO_PortSourceGPIOx where x can be (A..E).
373  *          GPIO_PinSource - specifies the pin for the Event output.
374  *            This parameter can be GPIO_PinSourcex where x can be (0..15).
375  *
376  * @return  none
377  */
GPIO_EventOutputConfig(uint8_t GPIO_PortSource,uint8_t GPIO_PinSource)378 void GPIO_EventOutputConfig(uint8_t GPIO_PortSource, uint8_t GPIO_PinSource)
379 {
380     uint32_t tmpreg = 0x00;
381 
382     tmpreg = AFIO->ECR;
383     tmpreg &= ECR_PORTPINCONFIG_MASK;
384     tmpreg |= (uint32_t)GPIO_PortSource << 0x04;
385     tmpreg |= GPIO_PinSource;
386     AFIO->ECR = tmpreg;
387 }
388 
389 /*********************************************************************
390  * @fn      GPIO_EventOutputCmd
391  *
392  * @brief   Enables or disables the Event Output.
393  *
394  * @param   NewState - ENABLE or DISABLE.
395  *
396  * @return  none
397  */
GPIO_EventOutputCmd(FunctionalState NewState)398 void GPIO_EventOutputCmd(FunctionalState NewState)
399 {
400     if(NewState)
401     {
402         AFIO->ECR |= (1 << 7);
403     }
404     else
405     {
406         AFIO->ECR &= ~(1 << 7);
407     }
408 }
409 
410 /*********************************************************************
411  * @fn      GPIO_PinRemapConfig
412  *
413  * @brief   Changes the mapping of the specified pin.
414  *
415  * @param   GPIO_Remap - selects the pin to remap.
416  *            GPIO_Remap_SPI1 - SPI1 Alternate Function mapping
417  *            GPIO_Remap_I2C1 - I2C1 Alternate Function mapping
418  *            GPIO_Remap_USART1 - USART1 Alternate Function mapping
419  *            GPIO_Remap_USART2 - USART2 Alternate Function mapping
420  *            GPIO_PartialRemap_USART3 - USART3 Partial Alternate Function mapping
421  *            GPIO_FullRemap_USART3 - USART3 Full Alternate Function mapping
422  *            GPIO_PartialRemap_TIM1 - TIM1 Partial Alternate Function mapping
423  *            GPIO_FullRemap_TIM1 - TIM1 Full Alternate Function mapping
424  *            GPIO_PartialRemap1_TIM2 - TIM2 Partial1 Alternate Function mapping
425  *            GPIO_PartialRemap2_TIM2 - TIM2 Partial2 Alternate Function mapping
426  *            GPIO_FullRemap_TIM2 - TIM2 Full Alternate Function mapping
427  *            GPIO_PartialRemap_TIM3 - TIM3 Partial Alternate Function mapping
428  *            GPIO_FullRemap_TIM3 - TIM3 Full Alternate Function mapping
429  *            GPIO_Remap_TIM4 - TIM4 Alternate Function mapping
430  *            GPIO_Remap1_CAN1 - CAN1 Alternate Function mapping
431  *            GPIO_Remap2_CAN1 - CAN1 Alternate Function mapping
432  *            GPIO_Remap_PD01 - PD01 Alternate Function mapping
433  *            GPIO_Remap_ADC1_ETRGINJ - ADC1 External Trigger Injected Conversion remapping
434  *            GPIO_Remap_ADC1_ETRGREG - ADC1 External Trigger Regular Conversion remapping
435  *            GPIO_Remap_ADC2_ETRGINJ - ADC2 External Trigger Injected Conversion remapping
436  *            GPIO_Remap_ADC2_ETRGREG - ADC2 External Trigger Regular Conversion remapping
437  *            GPIO_Remap_ETH - Ethernet remapping
438  *            GPIO_Remap_CAN2 - CAN2 remapping
439  *            GPIO_Remap_MII_RMII_SEL - MII or RMII selection
440  *            GPIO_Remap_SWJ_NoJTRST - Full SWJ Enabled (JTAG-DP + SW-DP) but without JTRST
441  *            GPIO_Remap_SWJ_JTAGDisable - JTAG-DP Disabled and SW-DP Enabled
442  *            GPIO_Remap_SWJ_Disable - Full SWJ Disabled (JTAG-DP + SW-DP)
443  *            GPIO_Remap_TIM2ITR1_PTP_SOF - Ethernet PTP output or USB OTG SOF (Start of Frame) connected
444  *        to TIM2 Internal Trigger 1 for calibration
445  *            GPIO_Remap_TIM2ITR1_PTP_SOF - Ethernet PTP output or USB OTG SOF (Start of Frame)
446  *            GPIO_Remap_TIM8 - TIM8 Alternate Function mapping
447  *            GPIO_PartialRemap_TIM9 - TIM9 Partial Alternate Function mapping
448  *            GPIO_FullRemap_TIM9 - TIM9 Full Alternate Function mapping
449  *            GPIO_PartialRemap_TIM10 - TIM10 Partial Alternate Function mapping
450  *            GPIO_FullRemap_TIM10 - TIM10 Full Alternate Function mapping
451  *            GPIO_Remap_FSMC_NADV - FSMC_NADV Alternate Function mapping
452  *            GPIO_PartialRemap_USART4 - USART4 Partial Alternate Function mapping
453  *            GPIO_FullRemap_USART4 - USART4 Full Alternate Function mapping
454  *            GPIO_PartialRemap_USART5 - USART5 Partial Alternate Function mapping
455  *            GPIO_FullRemap_USART5 - USART5 Full Alternate Function mapping
456  *            GPIO_PartialRemap_USART6 - USART6 Partial Alternate Function mapping
457  *            GPIO_FullRemap_USART6 - USART6 Full Alternate Function mapping
458  *            GPIO_PartialRemap_USART7 - USART7 Partial Alternate Function mapping
459  *            GPIO_FullRemap_USART7 - USART7 Full Alternate Function mapping
460  *            GPIO_PartialRemap_USART8 - USART8 Partial Alternate Function mapping
461  *            GPIO_FullRemap_USART8 - USART8 Full Alternate Function mapping
462  *            GPIO_Remap_USART1_HighBit - USART1 Alternate Function mapping high bit
463  *          NewState - ENABLE or DISABLE.
464  *
465  * @return  none
466  */
GPIO_PinRemapConfig(uint32_t GPIO_Remap,FunctionalState NewState)467 void GPIO_PinRemapConfig(uint32_t GPIO_Remap, FunctionalState NewState)
468 {
469     uint32_t tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00;
470 
471     if((GPIO_Remap & 0x80000000) == 0x80000000)
472     {
473         tmpreg = AFIO->PCFR2;
474     }
475     else
476     {
477         tmpreg = AFIO->PCFR1;
478     }
479 
480     tmpmask = (GPIO_Remap & DBGAFR_POSITION_MASK) >> 0x10;
481     tmp = GPIO_Remap & LSB_MASK;
482 
483     if((GPIO_Remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK))
484     {
485         tmpreg &= DBGAFR_SWJCFG_MASK;
486         AFIO->PCFR1 &= DBGAFR_SWJCFG_MASK;
487     }
488     else if((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK)
489     {
490         tmp1 = ((uint32_t)0x03) << tmpmask;
491         tmpreg &= ~tmp1;
492         tmpreg |= ~DBGAFR_SWJCFG_MASK;
493     }
494     else
495     {
496         tmpreg &= ~(tmp << ((GPIO_Remap >> 0x15) * 0x10));
497         tmpreg |= ~DBGAFR_SWJCFG_MASK;
498     }
499 
500     if(NewState != DISABLE)
501     {
502         tmpreg |= (tmp << ((GPIO_Remap >> 0x15) * 0x10));
503     }
504 
505     if((GPIO_Remap & 0x80000000) == 0x80000000)
506     {
507         AFIO->PCFR2 = tmpreg;
508     }
509     else
510     {
511         AFIO->PCFR1 = tmpreg;
512     }
513 }
514 
515 /*********************************************************************
516  * @fn      GPIO_EXTILineConfig
517  *
518  * @brief   Selects the GPIO pin used as EXTI Line.
519  *
520  * @param   GPIO_PortSource - selects the GPIO port to be used as source for EXTI lines.
521  *            This parameter can be GPIO_PortSourceGPIOx where x can be (A..G).
522  *          GPIO_PinSource - specifies the EXTI line to be configured.
523  *            This parameter can be GPIO_PinSourcex where x can be (0..15).
524  *
525  * @return  none
526  */
GPIO_EXTILineConfig(uint8_t GPIO_PortSource,uint8_t GPIO_PinSource)527 void GPIO_EXTILineConfig(uint8_t GPIO_PortSource, uint8_t GPIO_PinSource)
528 {
529     uint32_t tmp = 0x00;
530 
531     tmp = ((uint32_t)0x0F) << (0x04 * (GPIO_PinSource & (uint8_t)0x03));
532     AFIO->EXTICR[GPIO_PinSource >> 0x02] &= ~tmp;
533     AFIO->EXTICR[GPIO_PinSource >> 0x02] |= (((uint32_t)GPIO_PortSource) << (0x04 * (GPIO_PinSource & (uint8_t)0x03)));
534 }
535 
536 
537 
538 
539