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_esp/upd1/README!!__eRS232.txt

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+
+Address         Mode Name Description
+0x00EF..0xBFEF  R    DR   Data register (ZIFI or RS232).
+                          Get byte from input FIFO.
+                          Input FIFO must not be empty (xx_IFR > 0).
+0x00EF..0xBFEF  W    DR   Data register (ZIFI or RS232).
+                          Put byte into output FIFO.
+                          Output FIFO must not be full (xx_OFR > 0).
+
+Address Mode Name   Description
+0xC0EF  R    ZF_IFR ZIFI Input FIFO Used Register. Switch DR to ZIFI FIFO.
+                    0 - input FIFO is empty, 191 - input FIFO contain 191 or more bytes.
+0xC1EF  R    ZF_OFR ZIFI Output FIFO Free Register. Switch DR to ZIFI FIFO.
+                    0 - output FIFO is full, 191 - output FIFO free 191 or more bytes.
+0xC2EF  R    RS_IFR RS232 Input FIFO Used Register. Switch DR to RS232 FIFO.
+                    0 - input FIFO is empty, 191 - input FIFO contain 191 or more bytes.
+0xC3EF  R    RS_OFR RS232 Output FIFO Free Register. Switch DR to RS232 FIFO.
+                    0 - output FIFO is full, 191 - output FIFO free 191 or more bytes.
+
+Address Mode Name   Description
+0xC7EF  W    CR     Command register. Command set depends on API mode selected.
+
+  All mode commands:
+    Code     Command      Description
+    000000oi Clear ZIFI FIFOs
+             i: 1 - clear input ZIFI FIFO,
+             o: 1 - clear output ZIFI FIFO.
+    000001oi Clear RS232 FIFOs
+             i: 1 - clear input RS232 FIFO,
+             o: 1 - clear output RS232 FIFO.
+    11110mmm Set API mode or disable API:
+              0     API disabled.
+              1     transparent: all data is sent/received to/from external UART directly.
+              2..7  reserved.
+    11111111 Get Version  Returns highest supported API version. ER=0xFF - no API available.
+
+Address Mode Name Description
+0xC7EF  R    ER   Error register - command execution result code. Depends on command issued.
+
+  All mode responses:
+    Code Description
+    0x00 OK - no error.
+    0xFF REJ - command rejected.
+
+--------------------------------------------------------------------------------