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spi: Put argument of macro SPI_SWAP_DATA_TX/RX in parentheses

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Close https://github.com/espressif/esp-idf/pull/3996
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Martin Thierer 2019-09-01 21:41:34 +02:00 committed by Michael (XIAO Xufeng)
parent 5e0cc123ee
commit 2ca3735edd
1 changed files with 7 additions and 7 deletions
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14
components/driver/include/driver/spi_common.h
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@ -41,11 +41,11 @@ extern "C"
*
* Then points tx_buffer to ``&data``.
*
* @param data Data to be sent, can be uint8_t, uint16_t or uint32_t. @param
* len Length of data to be sent, since the SPI peripheral sends from the MSB,
* this helps to shift the data to the MSB.
* @param DATA Data to be sent, can be uint8_t, uint16_t or uint32_t.
* @param LEN Length of data to be sent, since the SPI peripheral sends from
* the MSB, this helps to shift the data to the MSB.
*/
#define SPI_SWAP_DATA_TX(data, len) __builtin_bswap32((uint32_t)data<<(32-len))
#define SPI_SWAP_DATA_TX(DATA, LEN) __builtin_bswap32((uint32_t)(DATA)<<(32-(LEN)))
/**
* Transform received data of length <= 32 bits to the format of an unsigned integer.
@ -54,11 +54,11 @@ extern "C"
*
* uint16_t data = SPI_SWAP_DATA_RX(*(uint32_t*)t->rx_data, 15);
*
* @param data Data to be rearranged, can be uint8_t, uint16_t or uint32_t.
* @param len Length of data received, since the SPI peripheral writes from
* @param DATA Data to be rearranged, can be uint8_t, uint16_t or uint32_t.
* @param LEN Length of data received, since the SPI peripheral writes from
* the MSB, this helps to shift the data to the LSB.
*/
#define SPI_SWAP_DATA_RX(data, len) (__builtin_bswap32(data)>>(32-len))
#define SPI_SWAP_DATA_RX(DATA, LEN) (__builtin_bswap32(DATA)>>(32-(LEN)))
/**
* @brief This is a configuration structure for a SPI bus.