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This commit is contained in:
UncleRus 2016-03-13 16:48:05 +05:00
parent 22ceb08b49
commit b0fb8736a8
1 changed files with 6 additions and 7 deletions
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13
core/include/esp/spi.h
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@ -54,9 +54,9 @@ typedef enum _spi_endianness_t {
} spi_endianness_t;
typedef enum _spi_word_size_t {
SPI_8BIT = 1, ///< 1 byte, no endian swapping
SPI_16BIT = 2, ///< 2 bytes, swap 16-bit values in SPI_BIG_ENDIAN mode
SPI_32BIT = 4 ///< 4 bytes, swap 32-bit values in SPI_BIG_ENDIAN mode
SPI_8BIT = 1, ///< 1 byte
SPI_16BIT = 2, ///< 2 bytes
SPI_32BIT = 4 ///< 4 bytes
} spi_word_size_t;
/**
@ -145,7 +145,6 @@ inline bool spi_get_msb(uint8_t bus)
/**
* \brief Set SPI bus byte order
* This value is ignored when transferring buffer with spi_transfer()
* \param bus Bus ID: 0 - system, 1 - user
* \param endianness Byte order
*/
@ -187,10 +186,10 @@ uint32_t spi_transfer_32(uint8_t bus, uint32_t data);
* \brief Transfer buffer of words over SPI
* Please note that the buffer size is in words, not in bytes!
* Example:
* const uint16_t out_buf[4] = { 0xa0b0, 0xa1b1, 0xa2b2, 0xa3b3 };
* uint16_t in_buf[4];
* const uint16_t out_buf[] = { 0xa0b0, 0xa1b1, 0xa2b2, 0xa3b3 };
* uint16_t in_buf[sizeof(out_buf)];
* spi_init(1, SPI_MODE1, SPI_FREQ_DIV_4M, true, SPI_BIG_ENDIAN, true);
* spi_transfer(1, buf, in_buf, 4, SPI_16BIT); // len = 4 words = 8 bytes
* spi_transfer(1, out_buf, in_buf, sizeof(out_buf), SPI_16BIT); // len = 4 words * 2 bytes = 8 bytes
*
* \param bus Bus ID: 0 - system, 1 - user
* \param out_data Data to send.