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- // SCSI subroutines that use hardware DMA for transfer in the background.
- // Uses either GD32 timer or external GreenPAK to implement REQ pin toggling.
- #pragma once
- #include <stdint.h>
- #include "AzulSCSI_platform.h"
- #include "greenpak.h"
- #ifdef SCSI_TIMER
- #define SCSI_ACCEL_DMA_AVAILABLE 1
- #endif
- /* Initialization function decides whether to use timer or GreenPAK */
- void scsi_accel_greenpak_dma_init();
- void scsi_accel_timer_dma_init();
- /* Common functions */
- void scsi_accel_dma_startWrite(const uint8_t* data, uint32_t count, volatile int *resetFlag);
- void scsi_accel_dma_stopWrite();
- void scsi_accel_dma_finishWrite(volatile int *resetFlag);
- // Query whether the data at pointer has already been read, i.e. buffer can be reused.
- // If data is NULL, checks if all writes have completed.
- bool scsi_accel_dma_isWriteFinished(const uint8_t* data);
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