URL
https://opencores.org/ocsvn/open8_urisc/open8_urisc/trunk
Subversion Repositories open8_urisc
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- This comparison shows the changes necessary to convert path
/
- from Rev 203 to Rev 204
- ↔ Reverse comparison
Rev 203 → Rev 204
/open8_urisc/trunk/VHDL/o8_sdlc_if.vhd
57,10 → 57,7
-- **** This location serves as the status register for the receive |
-- 1) This value is only updated on reception of a full frame, indicated |
-- by a start followed by a stop flag. Incomplete frames are ignored. |
-- 2) If the packet CRC matches the transmitted CRC, the packet is |
-- considered valid, and the received length (less CRC) is written. |
-- 3) If the packet CRC doesn't match, a value of ERR_CHECKSUM is written. |
-- 4) If too many bytes are received (buffer overflow), a value of |
-- 2) If too many bytes are received (buffer overflow), a value of |
-- ERR_LENGTH is written. |
|
library ieee; |
/open8_urisc/trunk/VHDL/sdlc_serial_rx.vhd
31,7 → 31,7
-- start/stop flags automatically. |
-- |
-- Also, the receiver will automatically idle itself between frames in the |
-- event the frame state is lost by detecting 16 or more consecutive '1's. |
-- event the frame state is lost by detecting 7 or more consecutive '1's. |
-- (This assumes the transmitter continuously drives the clock). |
-- |
-- Further, a second shift register listens for the SDLC Flag (0x7E) and will |
/open8_urisc/trunk/VHDL/sdlc_serial_txfsm.vhd
21,7 → 21,7
-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
-- |
-- VHDL Units : sdlc_serial_arbfsm |
-- VHDL Units : sdlc_serial_txfsm |
-- Description: Handles packet transmit functions by pulling the length from |
-- a predefined control/status field, then loading the packet |
-- contents from the dual-port memory and writing them to the |