2 ******************************************************************************
3 * @file stm32f30x_dma.c
4 * @author MCD Application Team
6 * @date 27-February-2014
7 * @brief This file provides firmware functions to manage the following
8 * functionalities of the Direct Memory Access controller (DMA):
9 * + Initialization and Configuration
11 * + Interrupts and flags management
15 ===============================================================================
16 ##### How to use this driver #####
17 ===============================================================================
19 (#) Enable The DMA controller clock using
20 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE) function for DMA1 or
21 using RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE) function for DMA2.
22 (#) Enable and configure the peripheral to be connected to the DMA channel
23 (except for internal SRAM / FLASH memories: no initialization is necessary).
24 (#) For a given Channel, program the Source and Destination addresses,
25 the transfer Direction, the Buffer Size, the Peripheral and Memory
26 Incrementation mode and Data Size, the Circular or Normal mode,
27 the channel transfer Priority and the Memory-to-Memory transfer
28 mode (if needed) using the DMA_Init() function.
29 (#) Enable the NVIC and the corresponding interrupt(s) using the function
30 DMA_ITConfig() if you need to use DMA interrupts.
31 (#) Enable the DMA channel using the DMA_Cmd() function.
32 (#) Activate the needed channel Request using PPP_DMACmd() function for
33 any PPP peripheral except internal SRAM and FLASH (ie. SPI, USART ...)
34 The function allowing this operation is provided in each PPP peripheral
35 driver (ie. SPI_DMACmd for SPI peripheral).
36 (#) Optionally, you can configure the number of data to be transferred
37 when the channel is disabled (ie. after each Transfer Complete event
38 or when a Transfer Error occurs) using the function DMA_SetCurrDataCounter().
39 And you can get the number of remaining data to be transferred using
40 the function DMA_GetCurrDataCounter() at run time (when the DMA channel is
42 (#) To control DMA events you can use one of the following two methods:
43 (##) Check on DMA channel flags using the function DMA_GetFlagStatus().
44 (##) Use DMA interrupts through the function DMA_ITConfig() at initialization
45 phase and DMA_GetITStatus() function into interrupt routines in
47 After checking on a flag you should clear it using DMA_ClearFlag()
48 function. And after checking on an interrupt event you should
49 clear it using DMA_ClearITPendingBit() function.
53 ******************************************************************************
56 * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
58 * Redistribution and use in source and binary forms, with or without modification,
59 * are permitted provided that the following conditions are met:
60 * 1. Redistributions of source code must retain the above copyright notice,
61 * this list of conditions and the following disclaimer.
62 * 2. Redistributions in binary form must reproduce the above copyright notice,
63 * this list of conditions and the following disclaimer in the documentation
64 * and/or other materials provided with the distribution.
65 * 3. Neither the name of STMicroelectronics nor the names of its contributors
66 * may be used to endorse or promote products derived from this software
67 * without specific prior written permission.
69 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
70 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
71 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
72 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
73 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
74 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
75 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
76 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
77 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
78 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
80 ******************************************************************************
83 /* Includes ------------------------------------------------------------------*/
84 #include "stm32f30x_dma.h"
86 /** @addtogroup STM32F30x_StdPeriph_Driver
91 * @brief DMA driver modules
95 /* Private typedef -----------------------------------------------------------*/
96 /* Private define ------------------------------------------------------------*/
97 #define CCR_CLEAR_MASK ((uint32_t)0xFFFF800F) /* DMA Channel config registers Masks */
98 #define FLAG_Mask ((uint32_t)0x10000000) /* DMA2 FLAG mask */
101 /* DMA1 Channelx interrupt pending bit masks */
102 #define DMA1_CHANNEL1_IT_MASK ((uint32_t)(DMA_ISR_GIF1 | DMA_ISR_TCIF1 | DMA_ISR_HTIF1 | DMA_ISR_TEIF1))
103 #define DMA1_CHANNEL2_IT_MASK ((uint32_t)(DMA_ISR_GIF2 | DMA_ISR_TCIF2 | DMA_ISR_HTIF2 | DMA_ISR_TEIF2))
104 #define DMA1_CHANNEL3_IT_MASK ((uint32_t)(DMA_ISR_GIF3 | DMA_ISR_TCIF3 | DMA_ISR_HTIF3 | DMA_ISR_TEIF3))
105 #define DMA1_CHANNEL4_IT_MASK ((uint32_t)(DMA_ISR_GIF4 | DMA_ISR_TCIF4 | DMA_ISR_HTIF4 | DMA_ISR_TEIF4))
106 #define DMA1_CHANNEL5_IT_MASK ((uint32_t)(DMA_ISR_GIF5 | DMA_ISR_TCIF5 | DMA_ISR_HTIF5 | DMA_ISR_TEIF5))
107 #define DMA1_CHANNEL6_IT_MASK ((uint32_t)(DMA_ISR_GIF6 | DMA_ISR_TCIF6 | DMA_ISR_HTIF6 | DMA_ISR_TEIF6))
108 #define DMA1_CHANNEL7_IT_MASK ((uint32_t)(DMA_ISR_GIF7 | DMA_ISR_TCIF7 | DMA_ISR_HTIF7 | DMA_ISR_TEIF7))
110 /* DMA2 Channelx interrupt pending bit masks */
111 #define DMA2_CHANNEL1_IT_MASK ((uint32_t)(DMA_ISR_GIF1 | DMA_ISR_TCIF1 | DMA_ISR_HTIF1 | DMA_ISR_TEIF1))
112 #define DMA2_CHANNEL2_IT_MASK ((uint32_t)(DMA_ISR_GIF2 | DMA_ISR_TCIF2 | DMA_ISR_HTIF2 | DMA_ISR_TEIF2))
113 #define DMA2_CHANNEL3_IT_MASK ((uint32_t)(DMA_ISR_GIF3 | DMA_ISR_TCIF3 | DMA_ISR_HTIF3 | DMA_ISR_TEIF3))
114 #define DMA2_CHANNEL4_IT_MASK ((uint32_t)(DMA_ISR_GIF4 | DMA_ISR_TCIF4 | DMA_ISR_HTIF4 | DMA_ISR_TEIF4))
115 #define DMA2_CHANNEL5_IT_MASK ((uint32_t)(DMA_ISR_GIF5 | DMA_ISR_TCIF5 | DMA_ISR_HTIF5 | DMA_ISR_TEIF5))
117 /* Private macro -------------------------------------------------------------*/
118 /* Private variables ---------------------------------------------------------*/
119 /* Private function prototypes -----------------------------------------------*/
120 /* Private functions ---------------------------------------------------------*/
122 /** @defgroup DMA_Private_Functions
126 /** @defgroup DMA_Group1 Initialization and Configuration functions
127 * @brief Initialization and Configuration functions
130 ===============================================================================
131 ##### Initialization and Configuration functions #####
132 ===============================================================================
133 [..] This subsection provides functions allowing to initialize the DMA channel
134 source and destination addresses, incrementation and data sizes, transfer
135 direction, buffer size, circular/normal mode selection, memory-to-memory
136 mode selection and channel priority value.
137 [..] The DMA_Init() function follows the DMA configuration procedures as described
138 in reference manual (RM00316).
145 * @brief Deinitializes the DMAy Channelx registers to their default reset
147 * @param DMAy_Channelx: where y can be 1 or 2 to select the DMA and
148 * x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel.
151 void DMA_DeInit(DMA_Channel_TypeDef* DMAy_Channelx)
153 /* Check the parameters */
154 assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
156 /* Disable the selected DMAy Channelx */
157 DMAy_Channelx->CCR &= (uint16_t)(~DMA_CCR_EN);
159 /* Reset DMAy Channelx control register */
160 DMAy_Channelx->CCR = 0;
162 /* Reset DMAy Channelx remaining bytes register */
163 DMAy_Channelx->CNDTR = 0;
165 /* Reset DMAy Channelx peripheral address register */
166 DMAy_Channelx->CPAR = 0;
168 /* Reset DMAy Channelx memory address register */
169 DMAy_Channelx->CMAR = 0;
171 if (DMAy_Channelx == DMA1_Channel1)
173 /* Reset interrupt pending bits for DMA1 Channel1 */
174 DMA1->IFCR |= DMA1_CHANNEL1_IT_MASK;
176 else if (DMAy_Channelx == DMA1_Channel2)
178 /* Reset interrupt pending bits for DMA1 Channel2 */
179 DMA1->IFCR |= DMA1_CHANNEL2_IT_MASK;
181 else if (DMAy_Channelx == DMA1_Channel3)
183 /* Reset interrupt pending bits for DMA1 Channel3 */
184 DMA1->IFCR |= DMA1_CHANNEL3_IT_MASK;
186 else if (DMAy_Channelx == DMA1_Channel4)
188 /* Reset interrupt pending bits for DMA1 Channel4 */
189 DMA1->IFCR |= DMA1_CHANNEL4_IT_MASK;
191 else if (DMAy_Channelx == DMA1_Channel5)
193 /* Reset interrupt pending bits for DMA1 Channel5 */
194 DMA1->IFCR |= DMA1_CHANNEL5_IT_MASK;
196 else if (DMAy_Channelx == DMA1_Channel6)
198 /* Reset interrupt pending bits for DMA1 Channel6 */
199 DMA1->IFCR |= DMA1_CHANNEL6_IT_MASK;
201 else if (DMAy_Channelx == DMA1_Channel7)
203 /* Reset interrupt pending bits for DMA1 Channel7 */
204 DMA1->IFCR |= DMA1_CHANNEL7_IT_MASK;
206 else if (DMAy_Channelx == DMA2_Channel1)
208 /* Reset interrupt pending bits for DMA2 Channel1 */
209 DMA2->IFCR |= DMA2_CHANNEL1_IT_MASK;
211 else if (DMAy_Channelx == DMA2_Channel2)
213 /* Reset interrupt pending bits for DMA2 Channel2 */
214 DMA2->IFCR |= DMA2_CHANNEL2_IT_MASK;
216 else if (DMAy_Channelx == DMA2_Channel3)
218 /* Reset interrupt pending bits for DMA2 Channel3 */
219 DMA2->IFCR |= DMA2_CHANNEL3_IT_MASK;
221 else if (DMAy_Channelx == DMA2_Channel4)
223 /* Reset interrupt pending bits for DMA2 Channel4 */
224 DMA2->IFCR |= DMA2_CHANNEL4_IT_MASK;
228 if (DMAy_Channelx == DMA2_Channel5)
230 /* Reset interrupt pending bits for DMA2 Channel5 */
231 DMA2->IFCR |= DMA2_CHANNEL5_IT_MASK;
237 * @brief Initializes the DMAy Channelx according to the specified parameters
238 * in the DMA_InitStruct.
239 * @param DMAy_Channelx: where y can be 1 or 2 to select the DMA and
240 * x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel.
241 * @param DMA_InitStruct: pointer to a DMA_InitTypeDef structure that contains
242 * the configuration information for the specified DMA Channel.
245 void DMA_Init(DMA_Channel_TypeDef* DMAy_Channelx, DMA_InitTypeDef* DMA_InitStruct)
249 /* Check the parameters */
250 assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
251 assert_param(IS_DMA_DIR(DMA_InitStruct->DMA_DIR));
252 assert_param(IS_DMA_PERIPHERAL_INC_STATE(DMA_InitStruct->DMA_PeripheralInc));
253 assert_param(IS_DMA_MEMORY_INC_STATE(DMA_InitStruct->DMA_MemoryInc));
254 assert_param(IS_DMA_PERIPHERAL_DATA_SIZE(DMA_InitStruct->DMA_PeripheralDataSize));
255 assert_param(IS_DMA_MEMORY_DATA_SIZE(DMA_InitStruct->DMA_MemoryDataSize));
256 assert_param(IS_DMA_MODE(DMA_InitStruct->DMA_Mode));
257 assert_param(IS_DMA_PRIORITY(DMA_InitStruct->DMA_Priority));
258 assert_param(IS_DMA_M2M_STATE(DMA_InitStruct->DMA_M2M));
260 /*--------------------------- DMAy Channelx CCR Configuration ----------------*/
261 /* Get the DMAy_Channelx CCR value */
262 tmpreg = DMAy_Channelx->CCR;
264 /* Clear MEM2MEM, PL, MSIZE, PSIZE, MINC, PINC, CIRC and DIR bits */
265 tmpreg &= CCR_CLEAR_MASK;
267 /* Configure DMAy Channelx: data transfer, data size, priority level and mode */
268 /* Set DIR bit according to DMA_DIR value */
269 /* Set CIRC bit according to DMA_Mode value */
270 /* Set PINC bit according to DMA_PeripheralInc value */
271 /* Set MINC bit according to DMA_MemoryInc value */
272 /* Set PSIZE bits according to DMA_PeripheralDataSize value */
273 /* Set MSIZE bits according to DMA_MemoryDataSize value */
274 /* Set PL bits according to DMA_Priority value */
275 /* Set the MEM2MEM bit according to DMA_M2M value */
276 tmpreg |= DMA_InitStruct->DMA_DIR | DMA_InitStruct->DMA_Mode |
277 DMA_InitStruct->DMA_PeripheralInc | DMA_InitStruct->DMA_MemoryInc |
278 DMA_InitStruct->DMA_PeripheralDataSize | DMA_InitStruct->DMA_MemoryDataSize |
279 DMA_InitStruct->DMA_Priority | DMA_InitStruct->DMA_M2M;
281 /* Write to DMAy Channelx CCR */
282 DMAy_Channelx->CCR = tmpreg;
284 /*--------------------------- DMAy Channelx CNDTR Configuration --------------*/
285 /* Write to DMAy Channelx CNDTR */
286 DMAy_Channelx->CNDTR = DMA_InitStruct->DMA_BufferSize;
288 /*--------------------------- DMAy Channelx CPAR Configuration ---------------*/
289 /* Write to DMAy Channelx CPAR */
290 DMAy_Channelx->CPAR = DMA_InitStruct->DMA_PeripheralBaseAddr;
292 /*--------------------------- DMAy Channelx CMAR Configuration ---------------*/
293 /* Write to DMAy Channelx CMAR */
294 DMAy_Channelx->CMAR = DMA_InitStruct->DMA_MemoryBaseAddr;
298 * @brief Fills each DMA_InitStruct member with its default value.
299 * @param DMA_InitStruct: pointer to a DMA_InitTypeDef structure which will
303 void DMA_StructInit(DMA_InitTypeDef* DMA_InitStruct)
305 /*-------------- Reset DMA init structure parameters values ------------------*/
306 /* Initialize the DMA_PeripheralBaseAddr member */
307 DMA_InitStruct->DMA_PeripheralBaseAddr = 0;
308 /* Initialize the DMA_MemoryBaseAddr member */
309 DMA_InitStruct->DMA_MemoryBaseAddr = 0;
310 /* Initialize the DMA_DIR member */
311 DMA_InitStruct->DMA_DIR = DMA_DIR_PeripheralSRC;
312 /* Initialize the DMA_BufferSize member */
313 DMA_InitStruct->DMA_BufferSize = 0;
314 /* Initialize the DMA_PeripheralInc member */
315 DMA_InitStruct->DMA_PeripheralInc = DMA_PeripheralInc_Disable;
316 /* Initialize the DMA_MemoryInc member */
317 DMA_InitStruct->DMA_MemoryInc = DMA_MemoryInc_Disable;
318 /* Initialize the DMA_PeripheralDataSize member */
319 DMA_InitStruct->DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
320 /* Initialize the DMA_MemoryDataSize member */
321 DMA_InitStruct->DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
322 /* Initialize the DMA_Mode member */
323 DMA_InitStruct->DMA_Mode = DMA_Mode_Normal;
324 /* Initialize the DMA_Priority member */
325 DMA_InitStruct->DMA_Priority = DMA_Priority_Low;
326 /* Initialize the DMA_M2M member */
327 DMA_InitStruct->DMA_M2M = DMA_M2M_Disable;
331 * @brief Enables or disables the specified DMAy Channelx.
332 * @param DMAy_Channelx: where y can be 1 or 2 to select the DMA and
333 * x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel.
334 * @param NewState: new state of the DMAy Channelx.
335 * This parameter can be: ENABLE or DISABLE.
338 void DMA_Cmd(DMA_Channel_TypeDef* DMAy_Channelx, FunctionalState NewState)
340 /* Check the parameters */
341 assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
342 assert_param(IS_FUNCTIONAL_STATE(NewState));
344 if (NewState != DISABLE)
346 /* Enable the selected DMAy Channelx */
347 DMAy_Channelx->CCR |= DMA_CCR_EN;
351 /* Disable the selected DMAy Channelx */
352 DMAy_Channelx->CCR &= (uint16_t)(~DMA_CCR_EN);
360 /** @defgroup DMA_Group2 Data Counter functions
361 * @brief Data Counter functions
364 ===============================================================================
365 ##### Data Counter functions #####
366 ===============================================================================
367 [..] This subsection provides function allowing to configure and read the buffer
368 size (number of data to be transferred).The DMA data counter can be written
369 only when the DMA channel is disabled (ie. after transfer complete event).
370 [..] The following function can be used to write the Channel data counter value:
371 (+) void DMA_SetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx, uint16_t DataNumber).
373 (@) It is advised to use this function rather than DMA_Init() in situations
374 where only the Data buffer needs to be reloaded.
375 [..] The DMA data counter can be read to indicate the number of remaining transfers
376 for the relative DMA channel. This counter is decremented at the end of each
377 data transfer and when the transfer is complete:
378 (+) If Normal mode is selected: the counter is set to 0.
379 (+) If Circular mode is selected: the counter is reloaded with the initial
380 value(configured before enabling the DMA channel).
381 [..] The following function can be used to read the Channel data counter value:
382 (+) uint16_t DMA_GetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx).
389 * @brief Sets the number of data units in the current DMAy Channelx transfer.
390 * @param DMAy_Channelx: where y can be 1 or 2 to select the DMA and
391 * x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel.
392 * @param DataNumber: The number of data units in the current DMAy Channelx
394 * @note This function can only be used when the DMAy_Channelx is disabled.
397 void DMA_SetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx, uint16_t DataNumber)
399 /* Check the parameters */
400 assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
402 /*--------------------------- DMAy Channelx CNDTR Configuration --------------*/
403 /* Write to DMAy Channelx CNDTR */
404 DMAy_Channelx->CNDTR = DataNumber;
408 * @brief Returns the number of remaining data units in the current
409 * DMAy Channelx transfer.
410 * @param DMAy_Channelx: where y can be 1 or 2 to select the DMA and
411 * x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel.
412 * @retval The number of remaining data units in the current DMAy Channelx
415 uint16_t DMA_GetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx)
417 /* Check the parameters */
418 assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
419 /* Return the number of remaining data units for DMAy Channelx */
420 return ((uint16_t)(DMAy_Channelx->CNDTR));
427 /** @defgroup DMA_Group3 Interrupts and flags management functions
428 * @brief Interrupts and flags management functions
431 ===============================================================================
432 ##### Interrupts and flags management functions #####
433 ===============================================================================
434 [..] This subsection provides functions allowing to configure the DMA Interrupt
435 sources and check or clear the flags or pending bits status.
436 The user should identify which mode will be used in his application to manage
437 the DMA controller events: Polling mode or Interrupt mode.
441 [..] Each DMA channel can be managed through 4 event Flags (y : DMA Controller
442 number, x : DMA channel number):
443 (#) DMAy_FLAG_TCx : to indicate that a Transfer Complete event occurred.
444 (#) DMAy_FLAG_HTx : to indicate that a Half-Transfer Complete event occurred.
445 (#) DMAy_FLAG_TEx : to indicate that a Transfer Error occurred.
446 (#) DMAy_FLAG_GLx : to indicate that at least one of the events described
449 (@) Clearing DMAy_FLAG_GLx results in clearing all other pending flags of the
450 same channel (DMAy_FLAG_TCx, DMAy_FLAG_HTx and DMAy_FLAG_TEx).
451 [..] In this Mode it is advised to use the following functions:
452 (+) FlagStatus DMA_GetFlagStatus(uint32_t DMA_FLAG);
453 (+) void DMA_ClearFlag(uint32_t DMA_FLAG);
455 *** Interrupt Mode ***
456 ======================
457 [..] Each DMA channel can be managed through 4 Interrupts:
459 (##) DMA_IT_TC: specifies the interrupt source for the Transfer Complete
461 (##) DMA_IT_HT: specifies the interrupt source for the Half-transfer Complete
463 (##) DMA_IT_TE: specifies the interrupt source for the transfer errors event.
464 (##) DMA_IT_GL: to indicate that at least one of the interrupts described
466 -@@- Clearing DMA_IT_GL interrupt results in clearing all other interrupts of
467 the same channel (DMA_IT_TCx, DMA_IT_HT and DMA_IT_TE).
468 [..] In this Mode it is advised to use the following functions:
469 (+) void DMA_ITConfig(DMA_Channel_TypeDef* DMAy_Channelx, uint32_t DMA_IT, FunctionalState NewState);
470 (+) ITStatus DMA_GetITStatus(uint32_t DMA_IT);
471 (+) void DMA_ClearITPendingBit(uint32_t DMA_IT);
478 * @brief Enables or disables the specified DMAy Channelx interrupts.
479 * @param DMAy_Channelx: where y can be 1 or 2 to select the DMA and
480 * x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel.
481 * @param DMA_IT: specifies the DMA interrupts sources to be enabled
483 * This parameter can be any combination of the following values:
484 * @arg DMA_IT_TC: Transfer complete interrupt mask
485 * @arg DMA_IT_HT: Half transfer interrupt mask
486 * @arg DMA_IT_TE: Transfer error interrupt mask
487 * @param NewState: new state of the specified DMA interrupts.
488 * This parameter can be: ENABLE or DISABLE.
491 void DMA_ITConfig(DMA_Channel_TypeDef* DMAy_Channelx, uint32_t DMA_IT, FunctionalState NewState)
493 /* Check the parameters */
494 assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx));
495 assert_param(IS_DMA_CONFIG_IT(DMA_IT));
496 assert_param(IS_FUNCTIONAL_STATE(NewState));
498 if (NewState != DISABLE)
500 /* Enable the selected DMA interrupts */
501 DMAy_Channelx->CCR |= DMA_IT;
505 /* Disable the selected DMA interrupts */
506 DMAy_Channelx->CCR &= ~DMA_IT;
511 * @brief Checks whether the specified DMAy Channelx flag is set or not.
512 * @param DMAy_FLAG: specifies the flag to check.
513 * This parameter can be one of the following values:
514 * @arg DMA1_FLAG_GL1: DMA1 Channel1 global flag.
515 * @arg DMA1_FLAG_TC1: DMA1 Channel1 transfer complete flag.
516 * @arg DMA1_FLAG_HT1: DMA1 Channel1 half transfer flag.
517 * @arg DMA1_FLAG_TE1: DMA1 Channel1 transfer error flag.
518 * @arg DMA1_FLAG_GL2: DMA1 Channel2 global flag.
519 * @arg DMA1_FLAG_TC2: DMA1 Channel2 transfer complete flag.
520 * @arg DMA1_FLAG_HT2: DMA1 Channel2 half transfer flag.
521 * @arg DMA1_FLAG_TE2: DMA1 Channel2 transfer error flag.
522 * @arg DMA1_FLAG_GL3: DMA1 Channel3 global flag.
523 * @arg DMA1_FLAG_TC3: DMA1 Channel3 transfer complete flag.
524 * @arg DMA1_FLAG_HT3: DMA1 Channel3 half transfer flag.
525 * @arg DMA1_FLAG_TE3: DMA1 Channel3 transfer error flag.
526 * @arg DMA1_FLAG_GL4: DMA1 Channel4 global flag.
527 * @arg DMA1_FLAG_TC4: DMA1 Channel4 transfer complete flag.
528 * @arg DMA1_FLAG_HT4: DMA1 Channel4 half transfer flag.
529 * @arg DMA1_FLAG_TE4: DMA1 Channel4 transfer error flag.
530 * @arg DMA1_FLAG_GL5: DMA1 Channel5 global flag.
531 * @arg DMA1_FLAG_TC5: DMA1 Channel5 transfer complete flag.
532 * @arg DMA1_FLAG_HT5: DMA1 Channel5 half transfer flag.
533 * @arg DMA1_FLAG_TE5: DMA1 Channel5 transfer error flag.
534 * @arg DMA1_FLAG_GL6: DMA1 Channel6 global flag.
535 * @arg DMA1_FLAG_TC6: DMA1 Channel6 transfer complete flag.
536 * @arg DMA1_FLAG_HT6: DMA1 Channel6 half transfer flag.
537 * @arg DMA1_FLAG_TE6: DMA1 Channel6 transfer error flag.
538 * @arg DMA1_FLAG_GL7: DMA1 Channel7 global flag.
539 * @arg DMA1_FLAG_TC7: DMA1 Channel7 transfer complete flag.
540 * @arg DMA1_FLAG_HT7: DMA1 Channel7 half transfer flag.
541 * @arg DMA1_FLAG_TE7: DMA1 Channel7 transfer error flag.
542 * @arg DMA2_FLAG_GL1: DMA2 Channel1 global flag.
543 * @arg DMA2_FLAG_TC1: DMA2 Channel1 transfer complete flag.
544 * @arg DMA2_FLAG_HT1: DMA2 Channel1 half transfer flag.
545 * @arg DMA2_FLAG_TE1: DMA2 Channel1 transfer error flag.
546 * @arg DMA2_FLAG_GL2: DMA2 Channel2 global flag.
547 * @arg DMA2_FLAG_TC2: DMA2 Channel2 transfer complete flag.
548 * @arg DMA2_FLAG_HT2: DMA2 Channel2 half transfer flag.
549 * @arg DMA2_FLAG_TE2: DMA2 Channel2 transfer error flag.
550 * @arg DMA2_FLAG_GL3: DMA2 Channel3 global flag.
551 * @arg DMA2_FLAG_TC3: DMA2 Channel3 transfer complete flag.
552 * @arg DMA2_FLAG_HT3: DMA2 Channel3 half transfer flag.
553 * @arg DMA2_FLAG_TE3: DMA2 Channel3 transfer error flag.
554 * @arg DMA2_FLAG_GL4: DMA2 Channel4 global flag.
555 * @arg DMA2_FLAG_TC4: DMA2 Channel4 transfer complete flag.
556 * @arg DMA2_FLAG_HT4: DMA2 Channel4 half transfer flag.
557 * @arg DMA2_FLAG_TE4: DMA2 Channel4 transfer error flag.
558 * @arg DMA2_FLAG_GL5: DMA2 Channel5 global flag.
559 * @arg DMA2_FLAG_TC5: DMA2 Channel5 transfer complete flag.
560 * @arg DMA2_FLAG_HT5: DMA2 Channel5 half transfer flag.
561 * @arg DMA2_FLAG_TE5: DMA2 Channel5 transfer error flag.
564 * The Global flag (DMAy_FLAG_GLx) is set whenever any of the other flags
565 * relative to the same channel is set (Transfer Complete, Half-transfer
566 * Complete or Transfer Error flags: DMAy_FLAG_TCx, DMAy_FLAG_HTx or
569 * @retval The new state of DMAy_FLAG (SET or RESET).
571 FlagStatus DMA_GetFlagStatus(uint32_t DMAy_FLAG)
573 FlagStatus bitstatus = RESET;
576 /* Check the parameters */
577 assert_param(IS_DMA_GET_FLAG(DMAy_FLAG));
579 /* Calculate the used DMAy */
580 if ((DMAy_FLAG & FLAG_Mask) != (uint32_t)RESET)
582 /* Get DMA2 ISR register value */
587 /* Get DMA1 ISR register value */
591 /* Check the status of the specified DMAy flag */
592 if ((tmpreg & DMAy_FLAG) != (uint32_t)RESET)
594 /* DMAy_FLAG is set */
599 /* DMAy_FLAG is reset */
603 /* Return the DMAy_FLAG status */
608 * @brief Clears the DMAy Channelx's pending flags.
609 * @param DMAy_FLAG: specifies the flag to clear.
610 * This parameter can be any combination (for the same DMA) of the following values:
611 * @arg DMA1_FLAG_GL1: DMA1 Channel1 global flag.
612 * @arg DMA1_FLAG_TC1: DMA1 Channel1 transfer complete flag.
613 * @arg DMA1_FLAG_HT1: DMA1 Channel1 half transfer flag.
614 * @arg DMA1_FLAG_TE1: DMA1 Channel1 transfer error flag.
615 * @arg DMA1_FLAG_GL2: DMA1 Channel2 global flag.
616 * @arg DMA1_FLAG_TC2: DMA1 Channel2 transfer complete flag.
617 * @arg DMA1_FLAG_HT2: DMA1 Channel2 half transfer flag.
618 * @arg DMA1_FLAG_TE2: DMA1 Channel2 transfer error flag.
619 * @arg DMA1_FLAG_GL3: DMA1 Channel3 global flag.
620 * @arg DMA1_FLAG_TC3: DMA1 Channel3 transfer complete flag.
621 * @arg DMA1_FLAG_HT3: DMA1 Channel3 half transfer flag.
622 * @arg DMA1_FLAG_TE3: DMA1 Channel3 transfer error flag.
623 * @arg DMA1_FLAG_GL4: DMA1 Channel4 global flag.
624 * @arg DMA1_FLAG_TC4: DMA1 Channel4 transfer complete flag.
625 * @arg DMA1_FLAG_HT4: DMA1 Channel4 half transfer flag.
626 * @arg DMA1_FLAG_TE4: DMA1 Channel4 transfer error flag.
627 * @arg DMA1_FLAG_GL5: DMA1 Channel5 global flag.
628 * @arg DMA1_FLAG_TC5: DMA1 Channel5 transfer complete flag.
629 * @arg DMA1_FLAG_HT5: DMA1 Channel5 half transfer flag.
630 * @arg DMA1_FLAG_TE5: DMA1 Channel5 transfer error flag.
631 * @arg DMA1_FLAG_GL6: DMA1 Channel6 global flag.
632 * @arg DMA1_FLAG_TC6: DMA1 Channel6 transfer complete flag.
633 * @arg DMA1_FLAG_HT6: DMA1 Channel6 half transfer flag.
634 * @arg DMA1_FLAG_TE6: DMA1 Channel6 transfer error flag.
635 * @arg DMA1_FLAG_GL7: DMA1 Channel7 global flag.
636 * @arg DMA1_FLAG_TC7: DMA1 Channel7 transfer complete flag.
637 * @arg DMA1_FLAG_HT7: DMA1 Channel7 half transfer flag.
638 * @arg DMA1_FLAG_TE7: DMA1 Channel7 transfer error flag.
639 * @arg DMA2_FLAG_GL1: DMA2 Channel1 global flag.
640 * @arg DMA2_FLAG_TC1: DMA2 Channel1 transfer complete flag.
641 * @arg DMA2_FLAG_HT1: DMA2 Channel1 half transfer flag.
642 * @arg DMA2_FLAG_TE1: DMA2 Channel1 transfer error flag.
643 * @arg DMA2_FLAG_GL2: DMA2 Channel2 global flag.
644 * @arg DMA2_FLAG_TC2: DMA2 Channel2 transfer complete flag.
645 * @arg DMA2_FLAG_HT2: DMA2 Channel2 half transfer flag.
646 * @arg DMA2_FLAG_TE2: DMA2 Channel2 transfer error flag.
647 * @arg DMA2_FLAG_GL3: DMA2 Channel3 global flag.
648 * @arg DMA2_FLAG_TC3: DMA2 Channel3 transfer complete flag.
649 * @arg DMA2_FLAG_HT3: DMA2 Channel3 half transfer flag.
650 * @arg DMA2_FLAG_TE3: DMA2 Channel3 transfer error flag.
651 * @arg DMA2_FLAG_GL4: DMA2 Channel4 global flag.
652 * @arg DMA2_FLAG_TC4: DMA2 Channel4 transfer complete flag.
653 * @arg DMA2_FLAG_HT4: DMA2 Channel4 half transfer flag.
654 * @arg DMA2_FLAG_TE4: DMA2 Channel4 transfer error flag.
655 * @arg DMA2_FLAG_GL5: DMA2 Channel5 global flag.
656 * @arg DMA2_FLAG_TC5: DMA2 Channel5 transfer complete flag.
657 * @arg DMA2_FLAG_HT5: DMA2 Channel5 half transfer flag.
658 * @arg DMA2_FLAG_TE5: DMA2 Channel5 transfer error flag.
661 * Clearing the Global flag (DMAy_FLAG_GLx) results in clearing all other flags
662 * relative to the same channel (Transfer Complete, Half-transfer Complete and
663 * Transfer Error flags: DMAy_FLAG_TCx, DMAy_FLAG_HTx and DMAy_FLAG_TEx).
667 void DMA_ClearFlag(uint32_t DMAy_FLAG)
669 /* Check the parameters */
670 assert_param(IS_DMA_CLEAR_FLAG(DMAy_FLAG));
672 /* Calculate the used DMAy */
673 if ((DMAy_FLAG & FLAG_Mask) != (uint32_t)RESET)
675 /* Clear the selected DMAy flags */
676 DMA2->IFCR = DMAy_FLAG;
680 /* Clear the selected DMAy flags */
681 DMA1->IFCR = DMAy_FLAG;
686 * @brief Checks whether the specified DMAy Channelx interrupt has occurred or not.
687 * @param DMAy_IT: specifies the DMAy interrupt source to check.
688 * This parameter can be one of the following values:
689 * @arg DMA1_IT_GL1: DMA1 Channel1 global interrupt.
690 * @arg DMA1_IT_TC1: DMA1 Channel1 transfer complete interrupt.
691 * @arg DMA1_IT_HT1: DMA1 Channel1 half transfer interrupt.
692 * @arg DMA1_IT_TE1: DMA1 Channel1 transfer error interrupt.
693 * @arg DMA1_IT_GL2: DMA1 Channel2 global interrupt.
694 * @arg DMA1_IT_TC2: DMA1 Channel2 transfer complete interrupt.
695 * @arg DMA1_IT_HT2: DMA1 Channel2 half transfer interrupt.
696 * @arg DMA1_IT_TE2: DMA1 Channel2 transfer error interrupt.
697 * @arg DMA1_IT_GL3: DMA1 Channel3 global interrupt.
698 * @arg DMA1_IT_TC3: DMA1 Channel3 transfer complete interrupt.
699 * @arg DMA1_IT_HT3: DMA1 Channel3 half transfer interrupt.
700 * @arg DMA1_IT_TE3: DMA1 Channel3 transfer error interrupt.
701 * @arg DMA1_IT_GL4: DMA1 Channel4 global interrupt.
702 * @arg DMA1_IT_TC4: DMA1 Channel4 transfer complete interrupt.
703 * @arg DMA1_IT_HT4: DMA1 Channel4 half transfer interrupt.
704 * @arg DMA1_IT_TE4: DMA1 Channel4 transfer error interrupt.
705 * @arg DMA1_IT_GL5: DMA1 Channel5 global interrupt.
706 * @arg DMA1_IT_TC5: DMA1 Channel5 transfer complete interrupt.
707 * @arg DMA1_IT_HT5: DMA1 Channel5 half transfer interrupt.
708 * @arg DMA1_IT_TE5: DMA1 Channel5 transfer error interrupt.
709 * @arg DMA1_IT_GL6: DMA1 Channel6 global interrupt.
710 * @arg DMA1_IT_TC6: DMA1 Channel6 transfer complete interrupt.
711 * @arg DMA1_IT_HT6: DMA1 Channel6 half transfer interrupt.
712 * @arg DMA1_IT_TE6: DMA1 Channel6 transfer error interrupt.
713 * @arg DMA1_IT_GL7: DMA1 Channel7 global interrupt.
714 * @arg DMA1_IT_TC7: DMA1 Channel7 transfer complete interrupt.
715 * @arg DMA1_IT_HT7: DMA1 Channel7 half transfer interrupt.
716 * @arg DMA1_IT_TE7: DMA1 Channel7 transfer error interrupt.
717 * @arg DMA2_IT_GL1: DMA2 Channel1 global interrupt.
718 * @arg DMA2_IT_TC1: DMA2 Channel1 transfer complete interrupt.
719 * @arg DMA2_IT_HT1: DMA2 Channel1 half transfer interrupt.
720 * @arg DMA2_IT_TE1: DMA2 Channel1 transfer error interrupt.
721 * @arg DMA2_IT_GL2: DMA2 Channel2 global interrupt.
722 * @arg DMA2_IT_TC2: DMA2 Channel2 transfer complete interrupt.
723 * @arg DMA2_IT_HT2: DMA2 Channel2 half transfer interrupt.
724 * @arg DMA2_IT_TE2: DMA2 Channel2 transfer error interrupt.
725 * @arg DMA2_IT_GL3: DMA2 Channel3 global interrupt.
726 * @arg DMA2_IT_TC3: DMA2 Channel3 transfer complete interrupt.
727 * @arg DMA2_IT_HT3: DMA2 Channel3 half transfer interrupt.
728 * @arg DMA2_IT_TE3: DMA2 Channel3 transfer error interrupt.
729 * @arg DMA2_IT_GL4: DMA2 Channel4 global interrupt.
730 * @arg DMA2_IT_TC4: DMA2 Channel4 transfer complete interrupt.
731 * @arg DMA2_IT_HT4: DMA2 Channel4 half transfer interrupt.
732 * @arg DMA2_IT_TE4: DMA2 Channel4 transfer error interrupt.
733 * @arg DMA2_IT_GL5: DMA2 Channel5 global interrupt.
734 * @arg DMA2_IT_TC5: DMA2 Channel5 transfer complete interrupt.
735 * @arg DMA2_IT_HT5: DMA2 Channel5 half transfer interrupt.
736 * @arg DMA2_IT_TE5: DMA2 Channel5 transfer error interrupt.
739 * The Global interrupt (DMAy_FLAG_GLx) is set whenever any of the other
740 * interrupts relative to the same channel is set (Transfer Complete,
741 * Half-transfer Complete or Transfer Error interrupts: DMAy_IT_TCx,
742 * DMAy_IT_HTx or DMAy_IT_TEx).
744 * @retval The new state of DMAy_IT (SET or RESET).
746 ITStatus DMA_GetITStatus(uint32_t DMAy_IT)
748 ITStatus bitstatus = RESET;
751 /* Check the parameters */
752 assert_param(IS_DMA_GET_IT(DMAy_IT));
754 /* Calculate the used DMA */
755 if ((DMAy_IT & FLAG_Mask) != (uint32_t)RESET)
757 /* Get DMA2 ISR register value */
762 /* Get DMA1 ISR register value */
766 /* Check the status of the specified DMAy interrupt */
767 if ((tmpreg & DMAy_IT) != (uint32_t)RESET)
774 /* DMAy_IT is reset */
777 /* Return the DMAy_IT status */
782 * @brief Clears the DMAy Channelx's interrupt pending bits.
783 * @param DMAy_IT: specifies the DMAy interrupt pending bit to clear.
784 * This parameter can be any combination (for the same DMA) of the following values:
785 * @arg DMA1_IT_GL1: DMA1 Channel1 global interrupt.
786 * @arg DMA1_IT_TC1: DMA1 Channel1 transfer complete interrupt.
787 * @arg DMA1_IT_HT1: DMA1 Channel1 half transfer interrupt.
788 * @arg DMA1_IT_TE1: DMA1 Channel1 transfer error interrupt.
789 * @arg DMA1_IT_GL2: DMA1 Channel2 global interrupt.
790 * @arg DMA1_IT_TC2: DMA1 Channel2 transfer complete interrupt.
791 * @arg DMA1_IT_HT2: DMA1 Channel2 half transfer interrupt.
792 * @arg DMA1_IT_TE2: DMA1 Channel2 transfer error interrupt.
793 * @arg DMA1_IT_GL3: DMA1 Channel3 global interrupt.
794 * @arg DMA1_IT_TC3: DMA1 Channel3 transfer complete interrupt.
795 * @arg DMA1_IT_HT3: DMA1 Channel3 half transfer interrupt.
796 * @arg DMA1_IT_TE3: DMA1 Channel3 transfer error interrupt.
797 * @arg DMA1_IT_GL4: DMA1 Channel4 global interrupt.
798 * @arg DMA1_IT_TC4: DMA1 Channel4 transfer complete interrupt.
799 * @arg DMA1_IT_HT4: DMA1 Channel4 half transfer interrupt.
800 * @arg DMA1_IT_TE4: DMA1 Channel4 transfer error interrupt.
801 * @arg DMA1_IT_GL5: DMA1 Channel5 global interrupt.
802 * @arg DMA1_IT_TC5: DMA1 Channel5 transfer complete interrupt.
803 * @arg DMA1_IT_HT5: DMA1 Channel5 half transfer interrupt.
804 * @arg DMA1_IT_TE5: DMA1 Channel5 transfer error interrupt.
805 * @arg DMA1_IT_GL6: DMA1 Channel6 global interrupt.
806 * @arg DMA1_IT_TC6: DMA1 Channel6 transfer complete interrupt.
807 * @arg DMA1_IT_HT6: DMA1 Channel6 half transfer interrupt.
808 * @arg DMA1_IT_TE6: DMA1 Channel6 transfer error interrupt.
809 * @arg DMA1_IT_GL7: DMA1 Channel7 global interrupt.
810 * @arg DMA1_IT_TC7: DMA1 Channel7 transfer complete interrupt.
811 * @arg DMA1_IT_HT7: DMA1 Channel7 half transfer interrupt.
812 * @arg DMA1_IT_TE7: DMA1 Channel7 transfer error interrupt.
813 * @arg DMA2_IT_GL1: DMA2 Channel1 global interrupt.
814 * @arg DMA2_IT_TC1: DMA2 Channel1 transfer complete interrupt.
815 * @arg DMA2_IT_HT1: DMA2 Channel1 half transfer interrupt.
816 * @arg DMA2_IT_TE1: DMA2 Channel1 transfer error interrupt.
817 * @arg DMA2_IT_GL2: DMA2 Channel2 global interrupt.
818 * @arg DMA2_IT_TC2: DMA2 Channel2 transfer complete interrupt.
819 * @arg DMA2_IT_HT2: DMA2 Channel2 half transfer interrupt.
820 * @arg DMA2_IT_TE2: DMA2 Channel2 transfer error interrupt.
821 * @arg DMA2_IT_GL3: DMA2 Channel3 global interrupt.
822 * @arg DMA2_IT_TC3: DMA2 Channel3 transfer complete interrupt.
823 * @arg DMA2_IT_HT3: DMA2 Channel3 half transfer interrupt.
824 * @arg DMA2_IT_TE3: DMA2 Channel3 transfer error interrupt.
825 * @arg DMA2_IT_GL4: DMA2 Channel4 global interrupt.
826 * @arg DMA2_IT_TC4: DMA2 Channel4 transfer complete interrupt.
827 * @arg DMA2_IT_HT4: DMA2 Channel4 half transfer interrupt.
828 * @arg DMA2_IT_TE4: DMA2 Channel4 transfer error interrupt.
829 * @arg DMA2_IT_GL5: DMA2 Channel5 global interrupt.
830 * @arg DMA2_IT_TC5: DMA2 Channel5 transfer complete interrupt.
831 * @arg DMA2_IT_HT5: DMA2 Channel5 half transfer interrupt.
832 * @arg DMA2_IT_TE5: DMA2 Channel5 transfer error interrupt.
835 * Clearing the Global interrupt (DMAy_IT_GLx) results in clearing all other
836 * interrupts relative to the same channel (Transfer Complete, Half-transfer
837 * Complete and Transfer Error interrupts: DMAy_IT_TCx, DMAy_IT_HTx and
842 void DMA_ClearITPendingBit(uint32_t DMAy_IT)
844 /* Check the parameters */
845 assert_param(IS_DMA_CLEAR_IT(DMAy_IT));
847 /* Calculate the used DMAy */
848 if ((DMAy_IT & FLAG_Mask) != (uint32_t)RESET)
850 /* Clear the selected DMAy interrupt pending bits */
851 DMA2->IFCR = DMAy_IT;
855 /* Clear the selected DMAy interrupt pending bits */
856 DMA1->IFCR = DMAy_IT;
876 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/