From 8cc4b7f2e82a9a498ad97fb3ba45626a5b745bf9 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sat, 8 Oct 2011 10:48:52 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3432 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32L1xx/stm32_dma.h | 320 +++++++++++++++++++++++++++++++++ 1 file changed, 320 insertions(+) create mode 100644 os/hal/platforms/STM32L1xx/stm32_dma.h (limited to 'os/hal/platforms/STM32L1xx/stm32_dma.h') diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.h b/os/hal/platforms/STM32L1xx/stm32_dma.h new file mode 100644 index 000000000..cada5de38 --- /dev/null +++ b/os/hal/platforms/STM32L1xx/stm32_dma.h @@ -0,0 +1,320 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, + 2011 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file STM32L1xx/stm32_dma.h + * @brief DMA helper driver header. + * @note This file requires definitions from the ST header file stm32f10x.h. + * @note This driver uses the new naming convention used for the STM32F2xx + * so the "DMA channels" are referred as "DMA streams". + * + * @addtogroup STM32L1xx_DMA + * @{ + */ + +#ifndef _STM32_DMA_H_ +#define _STM32_DMA_H_ + +/*===========================================================================*/ +/* Driver constants. */ +/*===========================================================================*/ + +/** + * @brief Total number of DMA streams. + * @note This is the total number of streams among all the DMA units. + */ +#define STM32_DMA_STREAMS 7 + +/** + * @brief Mask of the ISR bits passed to the DMA callback functions. + */ +#define STM32_DMA_ISR_MASK 0x0F + +/** + * @name DMA streams identifiers + * @{ + */ +#define STM32_DMA1_STREAM1 (&_stm32_dma_streams[0]) +#define STM32_DMA1_STREAM2 (&_stm32_dma_streams[1]) +#define STM32_DMA1_STREAM3 (&_stm32_dma_streams[2]) +#define STM32_DMA1_STREAM4 (&_stm32_dma_streams[3]) +#define STM32_DMA1_STREAM5 (&_stm32_dma_streams[4]) +#define STM32_DMA1_STREAM6 (&_stm32_dma_streams[5]) +#define STM32_DMA1_STREAM7 (&_stm32_dma_streams[6]) +/** @} */ + +/** + * @name CR register constants common to all DMA types + */ +#define STM32_DMA_CR_EN DMA_CCR1_EN +#define STM32_DMA_CR_TEIE DMA_CCR1_TEIE +#define STM32_DMA_CR_HTIE DMA_CCR1_HTIE +#define STM32_DMA_CR_TCIE DMA_CCR1_TCIE +#define STM32_DMA_CR_DIR_MASK (DMA_CCR1_DIR | DMA_CCR1_MEM2MEM) +#define STM32_DMA_CR_DIR_P2M 0 +#define STM32_DMA_CR_DIR_M2P DMA_CCR1_DIR +#define STM32_DMA_CR_DIR_M2M DMA_CCR1_MEM2MEM +#define STM32_DMA_CR_CIRC DMA_CCR1_CIRC +#define STM32_DMA_CR_PINC DMA_CCR1_PINC +#define STM32_DMA_CR_MINC DMA_CCR1_MINC +#define STM32_DMA_CR_PSIZE_MASK DMA_CCR1_PSIZE +#define STM32_DMA_CR_PSIZE_BYTE 0 +#define STM32_DMA_CR_PSIZE_HWORD DMA_CCR1_PSIZE_0 +#define STM32_DMA_CR_PSIZE_WORD DMA_CCR1_PSIZE_1 +#define STM32_DMA_CR_MSIZE_MASK DMA_CCR1_MSIZE +#define STM32_DMA_CR_MSIZE_BYTE 0 +#define STM32_DMA_CR_MSIZE_HWORD DMA_CCR1_MSIZE_0 +#define STM32_DMA_CR_MSIZE_WORD DMA_CCR1_MSIZE_1 +#define STM32_DMA_CR_PL_MASK DMA_CCR1_PL +#define STM32_DMA_CR_PL(n) ((n) << 12) +/** @} */ + +/** + * @name CR register constants only found in enhanced DMA + */ +#define STM32_DMA_CR_CHSEL_MASK 0 /**< @brief Ignored by normal DMA. */ +#define STM32_DMA_CR_CHSEL(n) 0 /**< @brief Ignored by normal DMA. */ +/** @} */ + +/** + * @name Status flags passed to the ISR callbacks + */ +#define STM32_DMA_ISR_FEIF 0 +#define STM32_DMA_ISR_DMEIF 0 +#define STM32_DMA_ISR_TEIF DMA_ISR_TEIF1 +#define STM32_DMA_ISR_HTIF DMA_ISR_HTIF1 +#define STM32_DMA_ISR_TCIF DMA_ISR_TCIF1 +/** @} */ + +/*===========================================================================*/ +/* Driver pre-compile time settings. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Derived constants and error checks. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver data structures and types. */ +/*===========================================================================*/ + +/** + * @brief STM32 DMA stream descriptor structure. + */ +typedef struct { + DMA_Channel_TypeDef *channel; /**< @brief Associated DMA channel. */ + volatile uint32_t *ifcr; /**< @brief Associated IFCR reg. */ + uint8_t ishift; /**< @brief Bits offset in xIFCR + register. */ + uint8_t selfindex; /**< @brief Index to self in array. */ + uint8_t vector; /**< @brief Associated IRQ vector. */ +} stm32_dma_stream_t; + +/** + * @brief STM32 DMA ISR function type. + * + * @param[in] p parameter for the registered function + * @param[in] flags pre-shifted content of the ISR register, the bits + * are aligned to bit zero + */ +typedef void (*stm32_dmaisr_t)(void *p, uint32_t flags); + +/*===========================================================================*/ +/* Driver macros. */ +/*===========================================================================*/ + +/** + * @brief Associates a peripheral data register to a DMA stream. + * @note This function can be invoked in both ISR or thread context. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * @param[in] addr value to be written in the CPAR register + * + * @special + */ +#define dmaStreamSetPeripheral(dmastp, addr) { \ + (dmastp)->channel->CPAR = (uint32_t)(addr); \ +} + +/** + * @brief Associates a memory destination to a DMA stream. + * @note This function can be invoked in both ISR or thread context. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * @param[in] addr value to be written in the CMAR register + * + * @special + */ +#define dmaStreamSetMemory0(dmastp, addr) { \ + (dmastp)->channel->CMAR = (uint32_t)(addr); \ +} + +/** + * @brief Sets the number of transfers to be performed. + * @note This function can be invoked in both ISR or thread context. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * @param[in] size value to be written in the CNDTR register + * + * @special + */ +#define dmaStreamSetTransactionSize(dmastp, size) { \ + (dmastp)->channel->CNDTR = (uint32_t)(size); \ +} + +/** + * @brief Returns the number of transfers to be performed. + * @note This function can be invoked in both ISR or thread context. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * @return The number of transfers to be performed. + * + * @special + */ +#define dmaStreamGetTransactionSize(dmastp) ((size_t)((dmastp)->channel->CNDTR)) + +/** + * @brief Programs the stream mode settings. + * @note This function can be invoked in both ISR or thread context. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * @param[in] mode value to be written in the CCR register + * + * @special + */ +#define dmaStreamSetMode(dmastp, mode) { \ + (dmastp)->channel->CCR = (uint32_t)(mode); \ +} + +/** + * @brief DMA stream enable. + * @note This function can be invoked in both ISR or thread context. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * + * @special + */ +#define dmaStreamEnable(dmastp) { \ + (dmastp)->channel->CCR |= STM32_DMA_CR_EN; \ +} + +/** + * @brief DMA stream disable. + * @note This function can be invoked in both ISR or thread context. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * + * @special + */ +#define dmaStreamDisable(dmastp) { \ + (dmastp)->channel->CCR &= ~STM32_DMA_CR_EN; \ +} + +/** + * @brief DMA stream interrupt sources clear. + * @note This function can be invoked in both ISR or thread context. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * + * @special + */ +#define dmaStreamClearInterrupt(dmastp) { \ + *(dmastp)->ifcr = STM32_DMA_ISR_MASK << (dmastp)->ishift; \ +} + +/** + * @brief Starts a memory to memory operation using the specified stream. + * @note The default transfer data mode is "byte to byte" but it can be + * changed by specifying extra options in the @p mode parameter. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + * @param[in] mode value to be written in the CCR register, this value + * is implicitly ORed with: + * - @p STM32_DMA_CR_MINC + * - @p STM32_DMA_CR_PINC + * - @p STM32_DMA_CR_DIR_M2M + * - @p STM32_DMA_CR_EN + * . + * @param[in] src source address + * @param[in] dst destination address + * @param[in] n number of data units to copy + */ +#define dmaStartMemCopy(dmastp, mode, src, dst, n) { \ + dmaStreamSetPeripheral(dmastp, src); \ + dmaStreamSetMemory0(dmastp, dst); \ + dmaStreamGetTransactionSize(dmastp, n); \ + dmaStreamSetMode(dmastp, (mode) | \ + STM32_DMA_CR_MINC | STM32_DMA_CR_PINC | \ + STM32_DMA_CR_DIR_M2M | STM32_DMA_CR_EN); \ +} + +/** + * @brief Polled wait for DMA transfer end. + * @pre The stream must have been allocated using @p dmaStreamAllocate(). + * @post After use the stream can be released using @p dmaStreamRelease(). + * + * @param[in] dmastp pointer to a stm32_dma_stream_t structure + */ +#define dmaWaitCompletion(dmastp) \ + while (((dmastp)->channel->CNDTR > 0) && \ + ((dmastp)->channel->CCR & STM32_DMA_CR_EN)) + +/*===========================================================================*/ +/* External declarations. */ +/*===========================================================================*/ + +#if !defined(__DOXYGEN__) +extern const stm32_dma_stream_t _stm32_dma_streams[STM32_DMA_STREAMS]; +#endif + +#ifdef __cplusplus +extern "C" { +#endif + void dmaInit(void); + bool_t dmaStreamAllocate(const stm32_dma_stream_t *dmastp, + uint32_t priority, + stm32_dmaisr_t func, + void *param); + void dmaStreamRelease(const stm32_dma_stream_t *dmastp); +#ifdef __cplusplus +} +#endif + +#endif /* _STM32_DMA_H_ */ + +/** @} */ -- cgit v1.2.3 From 05f792e54ea17171380538bf95e062ad6f37196c Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sat, 8 Oct 2011 10:49:17 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3433 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32L1xx/stm32_dma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'os/hal/platforms/STM32L1xx/stm32_dma.h') diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.h b/os/hal/platforms/STM32L1xx/stm32_dma.h index cada5de38..e23980f9f 100644 --- a/os/hal/platforms/STM32L1xx/stm32_dma.h +++ b/os/hal/platforms/STM32L1xx/stm32_dma.h @@ -21,7 +21,7 @@ /** * @file STM32L1xx/stm32_dma.h * @brief DMA helper driver header. - * @note This file requires definitions from the ST header file stm32f10x.h. + * @note This file requires definitions from the ST header file stm32l1xx.h. * @note This driver uses the new naming convention used for the STM32F2xx * so the "DMA channels" are referred as "DMA streams". * -- cgit v1.2.3 From ed26815f85668f5eedc6c28581e8900f037cbba1 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Thu, 10 Nov 2011 17:54:41 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3481 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32L1xx/stm32_dma.h | 51 +++++++++++++++++++++++++++++----- 1 file changed, 44 insertions(+), 7 deletions(-) (limited to 'os/hal/platforms/STM32L1xx/stm32_dma.h') diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.h b/os/hal/platforms/STM32L1xx/stm32_dma.h index e23980f9f..43ffdb668 100644 --- a/os/hal/platforms/STM32L1xx/stm32_dma.h +++ b/os/hal/platforms/STM32L1xx/stm32_dma.h @@ -47,21 +47,51 @@ */ #define STM32_DMA_ISR_MASK 0x0F +/** + * @brief Returns the channel associated to the specified stream. + * + * @param[in] n the stream number (0...STM32_DMA_STREAMS-1) + * @param[in] c a stream/channel association word, one channel per + * nibble, not associated channels must be set to 0xF + * @return Always zero, in this platform there is no dynamic + * association between streams and channels. + */ +#define STM32_DMA_GETCHANNEL(n, c) 0 + /** * @name DMA streams identifiers * @{ */ -#define STM32_DMA1_STREAM1 (&_stm32_dma_streams[0]) -#define STM32_DMA1_STREAM2 (&_stm32_dma_streams[1]) -#define STM32_DMA1_STREAM3 (&_stm32_dma_streams[2]) -#define STM32_DMA1_STREAM4 (&_stm32_dma_streams[3]) -#define STM32_DMA1_STREAM5 (&_stm32_dma_streams[4]) -#define STM32_DMA1_STREAM6 (&_stm32_dma_streams[5]) -#define STM32_DMA1_STREAM7 (&_stm32_dma_streams[6]) +/** + * @brief Returns an unique numeric identifier for a DMA stream. + * + * @param[in] dma the DMA unit number + * @param[in] stream the stream number + * @return An unique numeric stream identifier. + */ +#define STM32_DMA_STREAM_ID(dma, stream) ((stream) - 1) + +/** + * @brief Returns a pointer to a stm32_dma_stream_t structure. + * + * @param[in] n the stream numeric identifier + * @return A pointer to the stm32_dma_stream_t constant structure + * associated to the DMA stream. + */ +#define STM32_DMA_STREAM(n) (&_stm32_dma_streams[n)) + +#define STM32_DMA1_STREAM1 STM32_DMA_STREAM(0) +#define STM32_DMA1_STREAM2 STM32_DMA_STREAM(1) +#define STM32_DMA1_STREAM3 STM32_DMA_STREAM(2) +#define STM32_DMA1_STREAM4 STM32_DMA_STREAM(3) +#define STM32_DMA1_STREAM5 STM32_DMA_STREAM(4) +#define STM32_DMA1_STREAM6 STM32_DMA_STREAM(5) +#define STM32_DMA1_STREAM7 STM32_DMA_STREAM(6) /** @} */ /** * @name CR register constants common to all DMA types + * @{ */ #define STM32_DMA_CR_EN DMA_CCR1_EN #define STM32_DMA_CR_TEIE DMA_CCR1_TEIE @@ -88,6 +118,7 @@ /** * @name CR register constants only found in enhanced DMA + * @{ */ #define STM32_DMA_CR_CHSEL_MASK 0 /**< @brief Ignored by normal DMA. */ #define STM32_DMA_CR_CHSEL(n) 0 /**< @brief Ignored by normal DMA. */ @@ -95,6 +126,7 @@ /** * @name Status flags passed to the ISR callbacks + * @{ */ #define STM32_DMA_ISR_FEIF 0 #define STM32_DMA_ISR_DMEIF 0 @@ -140,6 +172,10 @@ typedef void (*stm32_dmaisr_t)(void *p, uint32_t flags); /* Driver macros. */ /*===========================================================================*/ +/** + * @name Macro Functions + * @{ + */ /** * @brief Associates a peripheral data register to a DMA stream. * @note This function can be invoked in both ISR or thread context. @@ -293,6 +329,7 @@ typedef void (*stm32_dmaisr_t)(void *p, uint32_t flags); #define dmaWaitCompletion(dmastp) \ while (((dmastp)->channel->CNDTR > 0) && \ ((dmastp)->channel->CCR & STM32_DMA_CR_EN)) +/** @} */ /*===========================================================================*/ /* External declarations. */ -- cgit v1.2.3 From c505341e78165415765743d423eedf9f62df0d1e Mon Sep 17 00:00:00 2001 From: gdisirio Date: Thu, 10 Nov 2011 20:15:51 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3483 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32L1xx/stm32_dma.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'os/hal/platforms/STM32L1xx/stm32_dma.h') diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.h b/os/hal/platforms/STM32L1xx/stm32_dma.h index 43ffdb668..7cfcf7536 100644 --- a/os/hal/platforms/STM32L1xx/stm32_dma.h +++ b/os/hal/platforms/STM32L1xx/stm32_dma.h @@ -74,11 +74,11 @@ /** * @brief Returns a pointer to a stm32_dma_stream_t structure. * - * @param[in] n the stream numeric identifier + * @param[in] id the stream numeric identifier * @return A pointer to the stm32_dma_stream_t constant structure * associated to the DMA stream. */ -#define STM32_DMA_STREAM(n) (&_stm32_dma_streams[n)) +#define STM32_DMA_STREAM(id) (&_stm32_dma_streams[id]) #define STM32_DMA1_STREAM1 STM32_DMA_STREAM(0) #define STM32_DMA1_STREAM2 STM32_DMA_STREAM(1) @@ -112,6 +112,8 @@ #define STM32_DMA_CR_MSIZE_BYTE 0 #define STM32_DMA_CR_MSIZE_HWORD DMA_CCR1_MSIZE_0 #define STM32_DMA_CR_MSIZE_WORD DMA_CCR1_MSIZE_1 +#define STM32_DMA_CR_SIZE_MASK (STM32_DMA_CR_MSIZE_MASK | \ + STM32_DMA_CR_MSIZE_MASK) #define STM32_DMA_CR_PL_MASK DMA_CCR1_PL #define STM32_DMA_CR_PL(n) ((n) << 12) /** @} */ -- cgit v1.2.3 From 3d09e9e86c134035e02ecf92255f72d8d08fdcf5 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Fri, 11 Nov 2011 14:11:52 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3486 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32L1xx/stm32_dma.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'os/hal/platforms/STM32L1xx/stm32_dma.h') diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.h b/os/hal/platforms/STM32L1xx/stm32_dma.h index 7cfcf7536..e22d99f2b 100644 --- a/os/hal/platforms/STM32L1xx/stm32_dma.h +++ b/os/hal/platforms/STM32L1xx/stm32_dma.h @@ -71,6 +71,28 @@ */ #define STM32_DMA_STREAM_ID(dma, stream) ((stream) - 1) +/** + * @brief Returns a DMA stream identifier mask. + * + * + * @param[in] dma the DMA unit number + * @param[in] stream the stream number + * @return A DMA stream identifier mask. + */ +#define STM32_DMA_STREAM_ID_MSK(dma, stream) \ + (1 << STM32_DMA_STREAM_ID(dma, stream)) + +/** + * @brief Checks if a DMA stream unique identifier belongs to a mask. + * @param[in] id the stream numeric identifier + * @param[in] mask the stream numeric identifiers mask + * + * @retval The check result. + * @retval FALSE id does not belong to the mask. + * @retval TRUE id belongs to the mask. + */ +#define STM32_DMA_IS_VALID_ID(id, mask) (((1 << (id)) & (mask))) + /** * @brief Returns a pointer to a stm32_dma_stream_t structure. * -- cgit v1.2.3 From ec1bf1b741390d7b6128382971b504a3ee9b7111 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sun, 13 Nov 2011 10:55:33 +0000 Subject: STM32F4xx SPI driver working. git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3490 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32L1xx/stm32_dma.h | 1 + 1 file changed, 1 insertion(+) (limited to 'os/hal/platforms/STM32L1xx/stm32_dma.h') diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.h b/os/hal/platforms/STM32L1xx/stm32_dma.h index e22d99f2b..0d80a39e7 100644 --- a/os/hal/platforms/STM32L1xx/stm32_dma.h +++ b/os/hal/platforms/STM32L1xx/stm32_dma.h @@ -144,6 +144,7 @@ * @name CR register constants only found in enhanced DMA * @{ */ +#define STM32_DMA_CR_DMEIE 0 /**< @brief Ignored by normal DMA. */ #define STM32_DMA_CR_CHSEL_MASK 0 /**< @brief Ignored by normal DMA. */ #define STM32_DMA_CR_CHSEL(n) 0 /**< @brief Ignored by normal DMA. */ /** @} */ -- cgit v1.2.3 From bcdb92f134f82921cbfe12774cc83e83ddee8eef Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sat, 19 Nov 2011 08:48:19 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3508 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32L1xx/stm32_dma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'os/hal/platforms/STM32L1xx/stm32_dma.h') diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.h b/os/hal/platforms/STM32L1xx/stm32_dma.h index 0d80a39e7..6afadfcc1 100644 --- a/os/hal/platforms/STM32L1xx/stm32_dma.h +++ b/os/hal/platforms/STM32L1xx/stm32_dma.h @@ -338,7 +338,7 @@ typedef void (*stm32_dmaisr_t)(void *p, uint32_t flags); #define dmaStartMemCopy(dmastp, mode, src, dst, n) { \ dmaStreamSetPeripheral(dmastp, src); \ dmaStreamSetMemory0(dmastp, dst); \ - dmaStreamGetTransactionSize(dmastp, n); \ + dmaStreamSetTransactionSize(dmastp, n); \ dmaStreamSetMode(dmastp, (mode) | \ STM32_DMA_CR_MINC | STM32_DMA_CR_PINC | \ STM32_DMA_CR_DIR_M2M | STM32_DMA_CR_EN); \ -- cgit v1.2.3