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spi_slave_hd_queue_trans() function
Queue transactions (segment mode)
Syntax
esp_err_t spi_slave_hd_queue_trans(spi_host_device_t host_id,
spi_slave_chan_t chan,
spi_slave_hd_data_t* trans,
TickType_t timeout);
Return value
- ESP_OK: on success - ESP_ERR_INVALID_ARG: The input argument is invalid. Can be the following reason: - The buffer given is not DMA capable - The length of data is invalid (not larger than 0, or exceed the max transfer length) - The transaction direction is invalid - ESP_ERR_TIMEOUT: Cannot queue the data before timeout. Master is still processing previous transaction. - ESP_ERR_INVALID_STATE: Function called in invalid state. This API should be called under segment mode.