How to Verify that a UART is Enabled on a Beaglebone Black
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Is the existence of a /dev/ttyO* symlink evidence that the corresponding UART device is enabled? If not, how can I check whether or not the UART has been successfully enabled?
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I'm learning how to use a Beaglebone Black. I'm running the Debian 9 IOT distro on a Beaglebone kernel 4.9. I'm interested in configuring the UART ports to read data from other devices. Many references seem to use the following command to check whether or not one or another UART device has been enabled:
ls -l /dev/ttyO*
It seems to me that the implicit statement here is that the existence of a ttyO* symlink is an indication that the corresponding UART device has been enabled, e.g. if the symlink /dev/ttyO2 -> ttyS2 exists then this means that UART2 has been enabled. Is this correct?
debian serial-port beagleboneblack uart
edited May 18 at 7:58
GAD3R
22.1k154891
asked May 17 at 18:28
igal
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up vote
1
down vote
favorite
Question
Is the existence of a /dev/ttyO* symlink evidence that the corresponding UART device is enabled? If not, how can I check whether or not the UART has been successfully enabled?
Details
I'm learning how to use a Beaglebone Black. I'm running the Debian 9 IOT distro on a Beaglebone kernel 4.9. I'm interested in configuring the UART ports to read data from other devices. Many references seem to use the following command to check whether or not one or another UART device has been enabled:
ls -l /dev/ttyO*
It seems to me that the implicit statement here is that the existence of a ttyO* symlink is an indication that the corresponding UART device has been enabled, e.g. if the symlink /dev/ttyO2 -> ttyS2 exists then this means that UART2 has been enabled. Is this correct?
debian serial-port beagleboneblack uart
edited May 18 at 7:58
GAD3R
22.1k154891
asked May 17 at 18:28
igal
4,785930
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
Question
Is the existence of a /dev/ttyO* symlink evidence that the corresponding UART device is enabled? If not, how can I check whether or not the UART has been successfully enabled?
Details
I'm learning how to use a Beaglebone Black. I'm running the Debian 9 IOT distro on a Beaglebone kernel 4.9. I'm interested in configuring the UART ports to read data from other devices. Many references seem to use the following command to check whether or not one or another UART device has been enabled:
ls -l /dev/ttyO*
It seems to me that the implicit statement here is that the existence of a ttyO* symlink is an indication that the corresponding UART device has been enabled, e.g. if the symlink /dev/ttyO2 -> ttyS2 exists then this means that UART2 has been enabled. Is this correct?
debian serial-port beagleboneblack uart
edited May 18 at 7:58
GAD3R
22.1k154891
asked May 17 at 18:28
igal
4,785930
Question
Is the existence of a /dev/ttyO* symlink evidence that the corresponding UART device is enabled? If not, how can I check whether or not the UART has been successfully enabled?
Details
I'm learning how to use a Beaglebone Black. I'm running the Debian 9 IOT distro on a Beaglebone kernel 4.9. I'm interested in configuring the UART ports to read data from other devices. Many references seem to use the following command to check whether or not one or another UART device has been enabled:
ls -l /dev/ttyO*
It seems to me that the implicit statement here is that the existence of a ttyO* symlink is an indication that the corresponding UART device has been enabled, e.g. if the symlink /dev/ttyO2 -> ttyS2 exists then this means that UART2 has been enabled. Is this correct?
debian serial-port beagleboneblack uart
edited May 18 at 7:58
GAD3R
22.1k154891
asked May 17 at 18:28
igal
4,785930
edited May 18 at 7:58
GAD3R
22.1k154891
edited May 18 at 7:58
GAD3R
22.1k154891
edited May 18 at 7:58
GAD3R
22.1k154891
22.1k154891
asked May 17 at 18:28
igal
4,785930
asked May 17 at 18:28
igal
4,785930
asked May 17 at 18:28
igal
4,785930
4,785930
add a comment |Â
add a comment |Â
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