mirror of https://github.com/ArduPilot/ardupilot
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
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bouncebuffer code for supporting ChibiOS drivers that use DMA, but may be passed memory that
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is not DMA safe.
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This API assumes that there will be only one user of a bouncebuffer at a time
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*/
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct bouncebuffer_t {
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uint8_t *dma_buf;
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uint8_t *orig_buf;
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uint32_t size;
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bool busy;
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bool is_sdcard;
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};
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/*
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initialise a bouncebuffer
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*/
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void bouncebuffer_init(struct bouncebuffer_t **bouncebuffer, uint32_t prealloc_bytes, bool sdcard);
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/*
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setup for reading from a device into memory, allocating a bouncebuffer if needed
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*/
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void bouncebuffer_setup_read(struct bouncebuffer_t *bouncebuffer, uint8_t **buf, uint32_t size);
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/*
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finish a read operation
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*/
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void bouncebuffer_finish_read(struct bouncebuffer_t *bouncebuffer, const uint8_t *buf, uint32_t size);
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/*
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setup for reading from memory to a device, allocating a bouncebuffer if needed
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*/
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void bouncebuffer_setup_write(struct bouncebuffer_t *bouncebuffer, const uint8_t **buf, uint32_t size);
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/*
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finish a write operation
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*/
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void bouncebuffer_finish_write(struct bouncebuffer_t *bouncebuffer, const uint8_t *buf);
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#ifdef __cplusplus
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}
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#endif
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