multicore_fifo_push_blocking_inline() function

Push data on to the write FIFO (data to the other core). This function will block until there is space for the data to be sent. Use multicore_fifo_wready() to check if it is possible to write to the FIFO if you don't want to block. See the note in the multicore_fifo section for considerations regarding use of the inter-core FIFOs