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https://github.com/openhwgroup/cvw
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20 lines
446 B
C
20 lines
446 B
C
#pragma once
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#include <stdint.h>
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// Command names
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#define SD_CMD_STOP_TRANSMISSION 12
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#define SD_CMD_READ_BLOCK_MULTIPLE 18
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#define SD_DATA_TOKEN 0xfe
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// Response lengths in bytes
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#define R1_RESPONSE 1
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#define R7_RESPONSE 7
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#define R1B_RESPONSE 2
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uint8_t crc7(uint8_t prev, uint8_t in);
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uint16_t crc16(uint16_t crc, uint8_t data);
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uint64_t sd_cmd(uint8_t cmd, uint32_t arg, uint8_t crc);
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uint64_t sd_read64(uint16_t * crc);
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void init_sd();
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