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driver: Add notes to SPI driver docs about thread safety

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Angus Gratton
2018-05-07 09:03:48 +08:00
committed by Angus Gratton
parent 5a080ee37a
commit b90ad81f22
2 changed files with 14 additions and 5 deletions
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12
components/driver/include/driver/spi_master.h
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@@ -226,15 +226,17 @@ esp_err_t spi_device_get_trans_result(spi_device_handle_t handle, spi_transactio
/**
* @brief Do a SPI transaction
* @brief Send a SPI transaction, wait for it to complete, and return the result
*
* Essentially does the same as spi_device_queue_trans followed by spi_device_get_trans_result. Do
* not use this when there is still a transaction queued that hasn't been finalized
* using spi_device_get_trans_result.
* This function is the equivalent of calling spi_device_queue_trans() followed by spi_device_get_trans_result().
* Do not use this when there is still a transaction separately queued from spi_device_queue_trans() that hasn't been finalized
* using spi_device_get_trans_result().
*
* @note This function is not thread safe when multiple tasks access the same SPI device.
*
* @param handle Device handle obtained using spi_host_add_dev
* @param trans_desc Description of transaction to execute
* @return
* @return
* - ESP_ERR_INVALID_ARG if parameter is invalid
* - ESP_OK on success
*/