rt-thread_esp-hosted/esp-hosted/docs/images/spi_hd_sequence_write.txt

@startuml

Title SPI HD Host Write

participant Slave
participant Host

note over Host: Prepare data to send

Host -> Slave: Read RX_BUF_LEN

note over Host: available buffers =\nRX_BUF_LEN - (cached)RX_BUF_LEN

note over Host: loop reading RX_BUF_LEN until\nbuffers available

Host -> Slave: Send WRDMA

Host -> Slave: Tranfer Data

Host -> Slave: Send WR_DONE\n(at end of transfer)

note over Host: update (cached)RX_BUF_LEN

@enduml