41 lines
1.6 KiB
C
41 lines
1.6 KiB
C
#ifndef __DMA_RING_BUFFER_H__
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#define __DMA_RING_BUFFER_H__
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#include <stdbool.h>
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#include <stm32f4xx.h>
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#include <stddef.h>
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struct dma_ring_buffer_to_mem {
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void *data_ptr;
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size_t buffer_count;
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DMA_Stream_TypeDef *dma;
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size_t get_idx;
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uint8_t base_dma_id;
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size_t element_size;
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};
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struct dma_ring_buffer_to_periph {
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void *src_buffer;
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size_t buffer_count;
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DMA_Stream_TypeDef *dma;
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volatile size_t dma_get_idx_current;
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volatile size_t dma_get_idx_future;
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volatile size_t sw_put_idx;
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uint8_t dma_base_id;
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size_t element_size;
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};
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int dma_ring_buffer_periph_to_mem_initialize(struct dma_ring_buffer_to_mem *dma_buffer, uint8_t base_dma_id, DMA_Stream_TypeDef *dma_stream, size_t buffer_element_count, size_t element_size, void *data_buffer, void *src_reg, uint8_t dma_trigger_channel);
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int dma_ring_buffer_periph_to_mem_get_data(struct dma_ring_buffer_to_mem *buff, const void **data_buff, size_t *len);
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void dma_ring_buffer_periph_to_mem_stop(struct dma_ring_buffer_to_mem *buff);
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int dma_ring_buffer_mem_to_periph_initialize(struct dma_ring_buffer_to_periph *dma_buffer, uint8_t base_dma_id, DMA_Stream_TypeDef *dma_stream, size_t buffer_element_count, size_t element_size, void *data_buffer, uint8_t dma_trigger_channel, void *dest_reg);
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int dma_ring_buffer_mem_to_periph_insert_data(struct dma_ring_buffer_to_periph *buff, const void *data_to_insert, size_t count);
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void dma_ring_buffer_mem_to_periph_int_callback(struct dma_ring_buffer_to_periph *buff);
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void dma_ring_buffer_mem_to_periph_stop(struct dma_ring_buffer_to_periph *buff);
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#endif /* __DMA_RING_BUFFER_H__ */
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