1 files changed, 93 insertions, 41 deletions
diff --git a/firmware/drivers/i2s.h b/firmware/drivers/i2s.h
index dbbb6f2..6e3acf2 100644
--- a/firmware/drivers/i2s.h
+++ b/firmware/drivers/i2s.h
@@ -1,41 +1,93 @@
-/****************************************************************************
- *   $Id:: i2s.h 5797 2010-12-03 00:27:00Z usb00423                         $
- *   Project: NXP LPC17xx I2S example
- *
- *   Description:
- *     This file contains I2S code header definition.
- *
- ****************************************************************************
- * Software that is described herein is for illustrative purposes only
- * which provides customers with programming information regarding the
- * products. This software is supplied "AS IS" without any warranties.
- * NXP Semiconductors assumes no responsibility or liability for the
- * use of the software, conveys no license or title under any patent,
- * copyright, or mask work right to the product. NXP Semiconductors
- * reserves the right to make changes in the software without
- * notification. NXP Semiconductors also make no representation or
- * warranty that such application will be suitable for the specified
- * use without further testing or modification.
-****************************************************************************/
-#ifndef __I2S_H 
-#define __I2S_H
-
-//#include "../src/sample.h"
-
-#define I2S_DMA_ENABLED		1
-
-#define BUFSIZE				0x200
-//(1097 * sizeof(short) * 2)/*stereo*/
-//((int)(sizeof(samples) * 2/*stereo*/))
-#define RXFIFO_EMPTY		0
-#define TXFIFO_FULL			8
-
-extern void I2S_IRQHandler( void );
-extern void I2SStart( void );
-extern void I2SStop( void );
-extern void I2SInit( void );
-
-#endif /* end __I2S_H */
-/****************************************************************************
-**                            End Of File
-*****************************************************************************/
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            i2s.h
+ *
+ *  Thu Aug 21 18:09:54 CEST 2014
+ *  Copyright 2014 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Pedal2Metal.
+ *
+ *  Pedal2Metal 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Pedal2Metal 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 Pedal2Metal; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#ifndef __PEDAL2METAL_I2S_H__
+#define __PEDAL2METAL_I2S_H__
+
+#include <stdint.h>
+
+void i2s_init();
+
+/**
+ * Enables accesses on FIFOs, places the transmit channel in unmute mode.
+ */
+void i2s_tx_start();
+
+/**
+ * Disables accesses on FIFOs, places the transmit channel in mute mode.
+ */
+void i2s_tx_stop();
+
+/**
+ * This bit reflects the presence of Receive Interrupt or Transmit Interrupt.
+ * This is determined by comparing the current FIFO levels to the rx_depth_irq
+ * and tx_depth_irq fields in the I2SIRQ register.
+ */
+int i2s_get_state_irq();
+
+/**
+ * This bit reflects the presence of Receive or Transmit DMA Request 1. This is
+ * determined by comparing the current FIFO levels to the rx_depth_dma1 and
+ * tx_depth_dma1 fields in the I2SDMA1 register.
+ */
+int i2s_get_state_dmareq1();
+
+/**
+ * This bit reflects the presence of Receive or Transmit DMA Request 2. This is
+ * determined by comparing the current FIFO levels to the rx_depth_dma2 and
+ * tx_depth_dma2 fields in the I2SDMA2 register.
+ */
+int i2s_get_state_dmareq2();
+
+/**
+ * Reflects the current level of the Receive FIFO.
+ */
+int i2s_get_state_rx_level();
+
+/**
+ * Reflects the current level of the Transmit FIFO.
+ */
+int i2s_get_state_tx_level();
+
+
+#if 0
+
+#define I2S_DMA_ENABLED		1
+
+#define BUFSIZE				0x200
+//(1097 * sizeof(short) * 2)/*stereo*/
+//((int)(sizeof(samples) * 2/*stereo*/))
+#define RXFIFO_EMPTY		0
+#define TXFIFO_FULL			8
+
+extern void I2S_IRQHandler( void );
+extern void I2SStart( void );
+extern void I2SStop( void );
+extern void I2SInit( void );
+
+#endif
+
+#endif/*__PEDAL2METAL_I2S_H__*/