Difference between revisions of "UART TX"

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(fixing the port function description by text from current "ports.txt")
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Write to this port sends the byte to serial port (routed to WiFi module connector).
+
Write:
Read from this port returns 0 if there are bytes to read in RX FIFO buffer, or 1 if no RX data.
+
: send a byte to the connected device.  There is no Tx buffer so the program must make sure the last transmission is completed before sending another byte.
 +
 
 +
Read:
 +
: bit 2 = 1 if the read buffer is full
 +
: bit 1 = 1 if the transmitter is busy sending a byte
 +
: bit 0 = 1 if the read buffer contains received bytes

Revision as of 11:13, 4 May 2020

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

Write:

send a byte to the connected device. There is no Tx buffer so the program must make sure the last transmission is completed before sending another byte.

Read:

bit 2 = 1 if the read buffer is full
bit 1 = 1 if the transmitter is busy sending a byte
bit 0 = 1 if the read buffer contains received bytes