pub type STATTX_W<'a, const O: u8> = FieldWriter<'a, u32, CHEP7R_SPEC, u8, u8, 2, O>;Expand description
Field STATTX writer - Status bits, for transmission transfers Device mode These bits contain the information about the endpoint status, listed in . These bits can be toggled by the software to initialize their value. When the application software writes ’0, the value remains unchanged, while writing ’1 makes the bit value toggle. Hardware sets the STTX bits to NAK, when a correct transfer has occurred (VTTX=1) corresponding to a IN or SETUP (control only) transaction addressed to this channel/endpoint. It then waits for the software to prepare the next set of data to be transmitted. Double-buffered bulk endpoints implement a special transaction flow control, which controls the status based on buffer availability condition (Refer to endpoints). If the endpoint is defined as Isochronous, its status can only be âVALIDâ or âDISABLEDâ. Therefore, the hardware cannot change the status of the channel/endpoint/channel after a successful transaction. If the software sets the STTX bits to ’STALLâ or ’NAKâ for an Isochronous channel/endpoint, the USB peripheral behavior is not defined. These bits are read/write but they can be only toggled by writing ’1. Host mode Same as STRX behaviour but for IN transactions (TBC)