29 lines
876 B
C
29 lines
876 B
C
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#include <stdint.h>
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#include <stdbool.h>
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typedef struct {
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bool selected;
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// Initialization status. 0 == not woken 8 == woken 9 == CMD0 received
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// 10 == CMD8 received, 11 == CMD55 received, 12 == CMD41 received (fully
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// initialized).
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unsigned int initstat;
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// We receive commands into this buffer.
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uint8_t recvbuf[6];
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// Where the next SPI byte should be stored in recvbuf.
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unsigned int recvidx;
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// Buffer to the arguments for a response
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uint8_t sendbuf[5];
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// Index of the next byte from sendbuf we should return. If -1, buffer is
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// empty.
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int sendidx;
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// One byte response. When all other response buffers are empty, return
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// this.
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uint8_t resp;
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} SDC;
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void sdc_init(SDC *sdc);
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void sdc_cslow(SDC *sdc);
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void sdc_cshigh(SDC *sdc);
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void sdc_spi_wr(SDC *sdc, uint8_t val);
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uint8_t sdc_spi_rd(SDC *sdc);
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