Coolterm serial port error
![coolterm serial port error coolterm serial port error](https://i.ytimg.com/vi/XdLb9gcrkA0/maxresdefault.jpg)
LabVIEW 6.1 and earlier does not replace a data byte with a parity error replacement byte. One issue with this is that in LabVIEW 7.0 and later, when NI-VISA receives a data byte with incorrect parity, it completely replaces the serial data with the error character, which by default is 0. If you read in a byte and you get a parity error, you know that the 9th bit is Mark and can append the appropriate bit.
![coolterm serial port error coolterm serial port error](https://projetsdiy.fr/data/uploads/2020/10/coolterm-comman-history-arduino-esp32-esp8266-stm32.jpg)
If you needed to transmit binary 000100011 instead, you would still transmit hex 0x88 but set the parity to Mark. Mark is a high parity bit (1), and Space is a low parity bit (0).įor example, if you need to transmit binary 000100010, you would transmit hex 0x88 and set the parity to Space.
![coolterm serial port error coolterm serial port error](https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/81/ErrorOnConnect.jpg)
There are two different workarounds that you may be able to use to communicate with 9 bits.
Coolterm serial port error driver#
Since the UART does not support 9 data bits directly, there is no provision in the driver to accomplish this. However, the UART on all National Instruments serial products only supports 5 to 8 data bits, Even/Odd/Mark/Space/None parity and 1/1.5/2 stop bits. The serial protocols for certain instruments use a 9-bit date frame, rather than the more common 8 data bits and a parity bit.