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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2012-03-13 15:41:46 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2012-03-13 15:41:46 +0000 |
| commit | 82984e1b5543228cfc3bd8bb40aa69046bc613e8 (patch) | |
| tree | 843a166c470c974f977b0284367b6f3abf3d76ba /os/hal/src | |
| parent | 80ca1868740b3b87edc1a07e7189c92072ee8509 (diff) | |
| download | ChibiOS-82984e1b5543228cfc3bd8bb40aa69046bc613e8.tar.gz ChibiOS-82984e1b5543228cfc3bd8bb40aa69046bc613e8.tar.bz2 ChibiOS-82984e1b5543228cfc3bd8bb40aa69046bc613e8.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4038 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/src')
| -rw-r--r-- | os/hal/src/i2s.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/os/hal/src/i2s.c b/os/hal/src/i2s.c new file mode 100644 index 000000000..4eecfffbf --- /dev/null +++ b/os/hal/src/i2s.c @@ -0,0 +1,194 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011,2012 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 <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file i2s.c
+ * @brief I2S Driver code.
+ *
+ * @addtogroup I2S
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_I2S || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief I2S Driver initialization.
+ * @note This function is implicitly invoked by @p halInit(), there is
+ * no need to explicitly initialize the driver.
+ *
+ * @init
+ */
+void i2sInit(void) {
+
+ i2s_lld_init();
+}
+
+/**
+ * @brief Initializes the standard part of a @p I2SDriver structure.
+ *
+ * @param[out] i2sp pointer to the @p I2SDriver object
+ *
+ * @init
+ */
+void i2sObjectInit(I2SDriver *i2sp) {
+
+ i2sp->state = I2S_STOP;
+ i2sp->config = NULL;
+}
+
+/**
+ * @brief Configures and activates the I2S peripheral.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ * @param[in] config pointer to the @p I2SConfig object
+ *
+ * @api
+ */
+void i2sStart(I2SDriver *i2sp, const I2SConfig *config) {
+
+ chDbgCheck((i2sp != NULL) && (config != NULL), "i2sStart");
+
+ chSysLock();
+ chDbgAssert((i2sp->state == I2S_STOP) || (i2sp->state == I2S_READY),
+ "i2sStart(), #1", "invalid state");
+ i2sp->config = config;
+ i2s_lld_start(i2sp);
+ i2sp->state = I2S_READY;
+ chSysUnlock();
+}
+
+/**
+ * @brief Deactivates the I2S peripheral.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ *
+ * @api
+ */
+void i2sStop(I2SDriver *i2sp) {
+
+ chDbgCheck(i2sp != NULL, "i2sStop");
+
+ chSysLock();
+ chDbgAssert((i2sp->state == I2S_STOP) || (i2sp->state == I2S_READY),
+ "i2sStop(), #1", "invalid state");
+ i2s_lld_stop(i2sp);
+ i2sp->state = I2S_STOP;
+ chSysUnlock();
+}
+
+/**
+ * @brief Starts a I2S transmission.
+ * @details The transmission is started and it is executes until the specified
+ * buffer has entirely transmitted.
+ * @post A callback is invoked when the buffer has been fully transmitted.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ * @param[in] n number of samples to send
+ * @param[in] txbuf the pointer to the transmit buffer
+ *
+ * @api
+ */
+void i2sStartSendOnce(I2SDriver *i2sp, size_t n,
+ const i2ssample_t *txbuf) {
+
+ chDbgCheck((i2sp != NULL) && (n > 0) && (txbuf != NULL),
+ "i2sStartSendOnce");
+
+ chSysLock();
+ chDbgAssert(i2sp->state == I2S_READY, "i2sStartSendOnce(), #1",
+ "not ready");
+ i2sStartSendOnceI(i2sp, n, txbuf);
+ chSysUnlock();
+}
+
+/**
+ * @brief Starts a continuous I2S transmission.
+ * @details The transmission is started and it is executes continuously
+ * until @p i2sStopSend() has been explicitly invoked .
+ * @post A callback is invoked when the buffer has been half transmitted
+ * and fully transmitted.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ * @param[in] n number of samples to send
+ * @param[in] txbuf the pointer to the transmit buffer
+ *
+ * @api
+ */
+void i2sStartSendContinuous(I2SDriver *i2sp, size_t n,
+ const i2ssample_t *txbuf) {
+
+ chDbgCheck((i2sp != NULL) && (n > 0) && (txbuf != NULL),
+ "i2sStartSendContinuous");
+
+ chSysLock();
+ chDbgAssert(i2sp->state == I2S_READY, "i2sStartSendContinuous(), #1",
+ "not ready");
+ i2sStartSendContinuousI(i2sp, n, txbuf);
+ chSysUnlock();
+}
+
+/**
+ * @brief Stops the ongoing transmission.
+ * @details The ongoing transmission, if any, is stopped, if the driver
+ * was not transmitting the function does nothing.
+ *
+ * @param[in] i2sp pointer to the @p I2SDriver object
+ *
+ * @api
+ */
+void i2sStopSend(I2SDriver *i2sp) {
+
+ chDbgCheck((i2sp != NULL), "i2sStopSend");
+
+ chSysLock();
+ chDbgAssert((i2sp->state == I2S_READY) ||
+ (i2sp->state == I2S_ACTIVE) ||
+ (i2sp->state == I2S_COMPLETE),
+ "i2sStopSend(), #1", "not ready");
+ i2sStopSendI(i2sp);
+ chSysUnlock();
+}
+
+#endif /* HAL_USE_I2S */
+
+/** @} */
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