Function esp_idf_sys::sdio_slave_send_queue

source ยท 
pub unsafe extern "C" fn sdio_slave_send_queue(
    addr: *mut u8,
    len: usize,
    arg: *mut c_void,
    wait: TickType_t,
) -> esp_err_t
Expand description

Put a new sending transfer into the send queue. The driver takes ownership of the buffer until the buffer is returned by sdio_slave_send_get_finished after the transaction is finished.

@param addr Address for data to be sent. The buffer should be DMA capable and 32-bit aligned. @param len Length of the data, should not be longer than 4092 bytes (may support longer in the future). @param arg Argument to returned in sdio_slave_send_get_finished. The argument can be used to indicate which transaction is done, or as a parameter for a callback. Set to NULL if not needed. @param wait Time to wait if the buffer is full.

@return - ESP_ERR_INVALID_ARG if the length is not greater than 0. - ESP_ERR_TIMEOUT if the queue is still full until timeout. - ESP_OK if success.