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/**
* @file
*
* @ingroup lpc_i2s
*
* @brief I2S API.
*/
/*
* Copyright (c) 2010 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef LIBBSP_ARM_SHARED_LPC_I2S_H
#define LIBBSP_ARM_SHARED_LPC_I2S_H
#include <bsp/utility.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup lpc_i2s I2S Support
*
* @ingroup arm_lpc24xx
* @ingroup arm_lpc32xx
*
* @brief I2S support.
*
* @{
*/
/**
* @brief I2S control block.
*/
typedef struct {
uint32_t dao;
uint32_t dai;
uint32_t txfifo;
uint32_t rxfifo;
uint32_t state;
uint32_t dma [2];
uint32_t irq;
uint32_t txrate;
uint32_t rxrate;
} lpc_i2s;
/**
* @name I2S Digital Audio Input and Output
*
* @{
*/
#define I2S_DAIO_WORDWIDTH(val) BSP_FLD32(val, 0, 1)
#define I2S_DAIO_MONO BSP_BIT32(2)
#define I2S_DAIO_STOP BSP_BIT32(3)
#define I2S_DAIO_RESET BSP_BIT32(4)
#define I2S_DAIO_WS_SEL BSP_BIT32(5)
#define I2S_DAIO_WS_HALFPERIOD(val) BSP_FLD32(val, 6, 14)
#define I2S_DAIO_MUTE BSP_BIT32(15)
/** @} */
/**
* @name I2S Status Feedback
*
* @{
*/
#define I2S_STATE_IRQ BSP_BIT32(0)
#define I2S_STATE_DMAREQ_0 BSP_BIT32(1)
#define I2S_STATE_DMAREQ_1 BSP_BIT32(2)
#define I2S_STATE_RX_LEVEL_GET(reg) BSP_FLD32GET(reg, 8, 11)
#define I2S_STATE_TX_LEVEL_GET(reg) BSP_FLD32GET(reg, 16, 19)
/** @} */
/**
* @name I2S DMA Configuration
*
* @{
*/
#define I2S_DMA_RX_ENABLE BSP_BIT32(0)
#define I2S_DMA_TX_ENABLE BSP_BIT32(1)
#define I2S_DMA_RX_DEPTH(val) BSP_FLD32(val, 8, 11)
#define I2S_DMA_TX_DEPTH(val) BSP_FLD32(val, 16, 19)
/** @} */
/**
* @name I2S Interrupt Request Control
*
* @{
*/
#define I2S_IRQ_RX BSP_BIT32(0)
#define I2S_IRQ_TX BSP_BIT32(1)
#define I2S_IRQ_RX_DEPTH(val) BSP_FLD32(val, 8, 11)
#define I2S_IRQ_TX_DEPTH(val) BSP_FLD32(val, 16, 19)
/** @} */
/**
* @name I2S Transmit and Receive Clock Rate
*
* @{
*/
#define LPC24XX_I2S_RATE(val) BSP_FLD32(val, 0, 9)
#define LPC32XX_I2S_RATE_X_DIVIDER(val) BSP_FLD32(val, 0, 7)
#define LPC32XX_I2S_RATE_Y_DIVIDER(val) BSP_FLD32(val, 8, 15)
/** @} */
/** @} */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LIBBSP_ARM_SHARED_LPC_I2S_H */
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