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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-06-15 15:58:20 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-06-15 15:58:20 +0000 |
| commit | 7c68ef157d009f9932ac47ba21ba5d74e321623f (patch) | |
| tree | 6c2442ca44cd090656ec3059ffb959f3d747e18d /os/hal/platforms/STM32/i2s_lld.c | |
| parent | 076746af63d317f8e96766b9137a65679f60463f (diff) | |
| parent | e0d850113610f3efa0c0ac4946901f683e5e7332 (diff) | |
| download | ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.tar.gz ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.tar.bz2 ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@5854 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/platforms/STM32/i2s_lld.c')
| -rw-r--r-- | os/hal/platforms/STM32/i2s_lld.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32/i2s_lld.c b/os/hal/platforms/STM32/i2s_lld.c new file mode 100644 index 000000000..b7eaf4b0c --- /dev/null +++ b/os/hal/platforms/STM32/i2s_lld.c @@ -0,0 +1,161 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file STM32/i2s_lld.c
+ * @brief I2S Driver subsystem low level driver source template.
+ *
+ * @addtogroup I2S
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_I2S || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level I2S driver initialization.
+ *
+ * @notapi
+ */
+void i2s_lld_init(void) {
+
+#if STM32_I2S_USE_I2S2
+ spiObjectInit(&I2SD2);
+ I2SD2.spi = SPI2;
+#endif
+
+#if STM32_I2S_USE_I2S3
+ spiObjectInit(&I2SD3);
+ I2SD3.spi = SPI3;
+#endif
+}
+
+/**
+ * @brief Configures and activates the I2S peripheral.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ *
+ * @notapi
+ */
+void i2s_lld_start(I2SDriver *i2sp) {
+
+ /* If in stopped state then enables the SPI and DMA clocks.*/
+ if (i2sp->state == I2S_STOP) {
+#if STM32_SPI_USE_SPI2
+ if (&SPID2 == spip) {
+ bool_t b;
+ b = dmaStreamAllocate(spip->dma,
+ STM32_I2S_I2S2_IRQ_PRIORITY,
+ (stm32_dmaisr_t)i2s_lld_serve_rx_interrupt,
+ (void *)spip);
+ chDbgAssert(!b, "spi_lld_start(), #1", "stream already allocated");
+ rccEnableSPI2(FALSE);
+ }
+#endif
+#if STM32_SPI_USE_SPI3
+ if (&SPID3 == spip) {
+ bool_t b;
+ b = dmaStreamAllocate(spip->dma,
+ STM32_I2S_I2S3_IRQ_PRIORITY,
+ (stm32_dmaisr_t)i2s_lld_serve_rx_interrupt,
+ (void *)spip);
+ chDbgAssert(!b, "spi_lld_start(), #2", "stream already allocated");
+ rccEnableSPI3(FALSE);
+ }
+#endif
+ }
+ /* Configuration.*/
+}
+
+/**
+ * @brief Deactivates the I2S peripheral.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ *
+ * @notapi
+ */
+void i2s_lld_stop(I2SDriver *i2sp) {
+
+ if (i2sp->state == I2S_READY) {
+ /* Clock deactivation.*/
+
+ }
+}
+
+/**
+ * @brief Starts a I2S data exchange.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ *
+ * @notapi
+ */
+void i2s_lld_start_exchange(I2SDriver *i2sp) {
+
+}
+
+/**
+ * @brief Starts a I2S data exchange in continuous mode.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ *
+ * @notapi
+ */
+void i2s_lld_start_exchange_continuous(I2SDriver *i2sp) {
+
+}
+
+/**
+ * @brief Stops the ongoing data exchange.
+ * @details The ongoing data exchange, if any, is stopped, if the driver
+ * was not active the function does nothing.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ *
+ * @notapi
+ */
+void i2s_lld_stop_exchange(I2SDriver *i2sp) {
+
+}
+
+#endif /* HAL_USE_I2S */
+
+/** @} */
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