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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-11-10 17:54:41 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-11-10 17:54:41 +0000 |
| commit | ed26815f85668f5eedc6c28581e8900f037cbba1 (patch) | |
| tree | 994c72b0900174001db8a5ce1d76883e67c60298 /os/hal/platforms/STM32F1xx/stm32_dma.h | |
| parent | b81fe69f7174006176e505ac66aff44eb8e246f2 (diff) | |
| download | ChibiOS-ed26815f85668f5eedc6c28581e8900f037cbba1.tar.gz ChibiOS-ed26815f85668f5eedc6c28581e8900f037cbba1.tar.bz2 ChibiOS-ed26815f85668f5eedc6c28581e8900f037cbba1.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3481 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/platforms/STM32F1xx/stm32_dma.h')
| -rw-r--r-- | os/hal/platforms/STM32F1xx/stm32_dma.h | 61 |
1 files changed, 49 insertions, 12 deletions
diff --git a/os/hal/platforms/STM32F1xx/stm32_dma.h b/os/hal/platforms/STM32F1xx/stm32_dma.h index bacd0a809..a33577af8 100644 --- a/os/hal/platforms/STM32F1xx/stm32_dma.h +++ b/os/hal/platforms/STM32F1xx/stm32_dma.h @@ -52,25 +52,55 @@ #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])
-#define STM32_DMA2_STREAM1 (&_stm32_dma_streams[7])
-#define STM32_DMA2_STREAM2 (&_stm32_dma_streams[8])
-#define STM32_DMA2_STREAM3 (&_stm32_dma_streams[9])
-#define STM32_DMA2_STREAM4 (&_stm32_dma_streams[10])
-#define STM32_DMA2_STREAM5 (&_stm32_dma_streams[11])
+/**
+ * @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) ((((dma) - 1) * 7) + ((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)
+#define STM32_DMA2_STREAM1 STM32_DMA_STREAM(7)
+#define STM32_DMA2_STREAM2 STM32_DMA_STREAM(8)
+#define STM32_DMA2_STREAM3 STM32_DMA_STREAM(9)
+#define STM32_DMA2_STREAM4 STM32_DMA_STREAM(10)
+#define STM32_DMA2_STREAM5 STM32_DMA_STREAM(11)
/** @} */
/**
* @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
@@ -97,6 +127,7 @@ /**
* @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. */
@@ -104,6 +135,7 @@ /**
* @name Status flags passed to the ISR callbacks
+ * @{
*/
#define STM32_DMA_ISR_FEIF 0
#define STM32_DMA_ISR_DMEIF 0
@@ -150,6 +182,10 @@ typedef void (*stm32_dmaisr_t)(void *p, uint32_t flags); /*===========================================================================*/
/**
+ * @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.
* @pre The stream must have been allocated using @p dmaStreamAllocate().
@@ -302,6 +338,7 @@ 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. */
|