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The C Users' Group Library 1994 August
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wc-cdrom-cusersgrouplibrary-1994-08.iso
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v_10_05
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1005070a
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1992-03-05
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/* Listing 8 */
/*****************************************************
DMA.H
Header file containing basic number defs and
function prototypes for working with the DMA
controller.
Copyright Don Bradley, 1991.
Permission is granted for used of these routines
in any manner as long as this copyright notice is
included.
Tested using Quick C 2.5 and MSC 6.0 on a
Toshiba T5200.
*****************************************************/
#define TRUE 1
#define FALSE 0
/* mask defines */
#define DMA_ENABLE 0x00
#define DMA_DISABLE 0x04
#define DMA_DEMAND_MODE 0x00
#define DMA_SINGLE_MODE 0x40
#define DMA_ADDRESS_INC 0x00
#define DMA_ADDRESS_DEC 0x20
#define DMA_CONTINUOUS_ENABLE 0x10
#define DMA_CONTINUOUS_DISABLE 0x00
#define DMA_ADC_TRANSFER 0x04
#define DMA_DAC_TRANSFER 0x08
int dma(int dma_channel, int mode, int far *buffer,
unsigned int buffer_len);
void disable_dma(int chan);
void enable_dma(int chan);
int far *alloc_dma_buffer(int dma_chn,
unsigned int size);
void free_dma_buffer(int dma_chn);