Difference between revisions of "UART TX"

Latest revision as of 22:05, 1 July 2022

Number	$133B
Decimal	4923
Short desc.	Sends byte to serial port. If read, tells if data in RX buffer
Bit Mask	%0001 0011 0011 1011
Readable	Yes
Writable	Yes
Subsystem	UART

0x133B UART Tx

(R)

bit 7 = 1 if the Rx is in a break condition ; external device has held Tx=0 for at least 20 bit periods

bit 6 = 1 if the Rx experienced a framing error ; (clears on read, includes parity and stop bit errors)

bit 5 = 1 if the next Rx byte was received after an error condition was detected (framing, overflow)

bit 4 = 1 if the Tx buffer is empty

bit 3 = 1 if the Rx buffer is near full (3/4)

bit 2 = 1 if the Rx buffer overflowed ; (clears on read)

bit 1 = 1 if the Tx buffer is full

bit 0 = 1 if the Rx buffer contains bytes

(W)

Send a byte to the connected device.

@@ Line 1: / Line 1: @@
 {{Port
 |Number=$133B
+|NumberDec=4923
+|PortMask=%0001 0011 0011 1011
 |ShortDesc=Sends byte to serial port. If read, tells if data in RX buffer
-|PortMask=%0001 0011 0011 1011 ??
 |Readable=Yes
 |Writable=Yes
 |Subsystem=UART
 }}
-Write to this port sends the byte to serial port (routed to WiFi module connector).
+x133B UART Tx
-Read from this port returns 0 if there are bytes to read in RX FIFO buffer, or 1 if no RX data.
+(R)
+:bit 7 = 1 if the Rx is in a break condition      ; external device has held Tx=0 for at least 20 bit periods
+:bit 6 = 1 if the Rx experienced a framing error  ; (clears on read, includes parity and stop bit errors)
+:bit 5 = 1 if the next Rx byte was received after an error condition was detected (framing, overflow)
+:bit 4 = 1 if the Tx buffer is empty
+:bit 3 = 1 if the Rx buffer is near full (3/4)
+:bit 2 = 1 if the Rx buffer overflowed            ; (clears on read)
+:bit 1 = 1 if the Tx buffer is full
+:bit 0 = 1 if the Rx buffer contains bytes
+(W)
+:Send a byte to the connected device.