filename | src/sh4/dmac.h |
changeset | 736:a02d1475ccfd |
prev | 561:533f6b478071 |
author | nkeynes |
date | Wed Feb 25 09:00:05 2009 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Argh. Apparently we still do really need _BSD_SOURCE and _GNU_SOURCE I think that's everything now... |
file | annotate | diff | log | raw |
nkeynes@58 | 1 | /** |
nkeynes@561 | 2 | * $Id$ |
nkeynes@58 | 3 | * |
nkeynes@58 | 4 | * SH4 onboard DMA controller (DMAC) definitions. |
nkeynes@58 | 5 | * |
nkeynes@58 | 6 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@58 | 7 | * |
nkeynes@58 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@58 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@58 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@58 | 11 | * (at your option) any later version. |
nkeynes@58 | 12 | * |
nkeynes@58 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@58 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@58 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@58 | 16 | * GNU General Public License for more details. |
nkeynes@58 | 17 | */ |
nkeynes@58 | 18 | |
nkeynes@736 | 19 | #ifndef lxdream_dmac_H |
nkeynes@736 | 20 | #define lxdream_dmac_H 1 |
nkeynes@58 | 21 | |
nkeynes@58 | 22 | #include <stdint.h> |
nkeynes@58 | 23 | |
nkeynes@58 | 24 | #ifdef __cplusplus |
nkeynes@58 | 25 | extern "C" { |
nkeynes@58 | 26 | #endif |
nkeynes@58 | 27 | |
nkeynes@58 | 28 | /* External DREQ. Note only used for DMA memory-to-memory - for single |
nkeynes@58 | 29 | * address transfers the device uses DMAC_get_buffer/DMAC_put_buffer. |
nkeynes@58 | 30 | */ |
nkeynes@58 | 31 | #define DMAC_EXTERNAL 0 |
nkeynes@58 | 32 | #define DMAC_SCI_TDE 1 /* SCI Transmit data empty */ |
nkeynes@58 | 33 | #define DMAC_SCI_RDF 2 /* SCI Receive data full */ |
nkeynes@58 | 34 | #define DMAC_SCIF_TDE 3 /* SCIF Transmit data empty */ |
nkeynes@58 | 35 | #define DMAC_SCIF_RDF 4 /* SCIF Receive data full */ |
nkeynes@58 | 36 | #define DMAC_TMU_ICI 5 /* TMU Input capture interrupt (not used?) */ |
nkeynes@58 | 37 | |
nkeynes@58 | 38 | /** |
nkeynes@58 | 39 | * Trigger a DMAC transfer by asserting one of the above DMA request lines |
nkeynes@58 | 40 | * (from the onboard peripherals). Actual transfer is dependent on the |
nkeynes@58 | 41 | * relevant channel configuration. |
nkeynes@58 | 42 | */ |
nkeynes@58 | 43 | void DMAC_trigger( int dmac_trigger ); |
nkeynes@58 | 44 | |
nkeynes@58 | 45 | /** |
nkeynes@58 | 46 | * Execute a memory-to-external-device transfer. Copies data into the supplied |
nkeynes@58 | 47 | * buffer up to a maximum of bytecount bytes. |
nkeynes@58 | 48 | * @return Actual number of bytes copied. |
nkeynes@58 | 49 | */ |
nkeynes@430 | 50 | uint32_t DMAC_get_buffer( int channel, unsigned char *buf, uint32_t bytecount ); |
nkeynes@58 | 51 | |
nkeynes@58 | 52 | /** |
nkeynes@58 | 53 | * execute an external-device-to-memory transfer. Copies data from the |
nkeynes@58 | 54 | * supplied buffer into memory up to a maximum of bytecount bytes. |
nkeynes@58 | 55 | * @return Actual number of bytes copied. |
nkeynes@58 | 56 | */ |
nkeynes@430 | 57 | uint32_t DMAC_put_buffer( int channel, unsigned char *buf, uint32_t bytecount ); |
nkeynes@58 | 58 | |
nkeynes@58 | 59 | #ifdef __cplusplus |
nkeynes@58 | 60 | } |
nkeynes@58 | 61 | #endif |
nkeynes@736 | 62 | |
nkeynes@736 | 63 | #endif /* !lxdream_dmac_H */ |
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