This issue refers to the MAIN_PR006949 problem report.
Product Number
13Z025-90
Detected in Revision
01_17
Initiating
Ferdinand Lenhardt (menFedinandL)
Description
There could be constellations with UART instances on different boards with different UART base clocks, which would require to specify a different baud_base in the UART software driver. However only one baud_base for all UARTs can be specified.
Problem Analysis Result
The UART software driver is responsible for all UART instances.
The described problem has been reproduced on a test FPGA design with two different UART instances having two different base clocks (29.4912 MHz and 66 MHz, the two typical base clocks in our systems).
Project Impact/symptom
If there are UARTs with different base clocks in the system, some of the UARTs would not communicate with the correct baudrate.
Problem change suggestion
Introduce a new UART software driver parameter of type string (which overrides baud_base) for being able to specify a different baud base for each of the UART instances.
mlassota
commented
3 years ago
This issue refers to the MAIN_PR006949 problem report.
Product Number 13Z025-90
Detected in Revision 01_17
Initiating Ferdinand Lenhardt (menFedinandL)
Description There could be constellations with UART instances on different boards with different UART base clocks, which would require to specify a different baud_base in the UART software driver. However only one baud_base for all UARTs can be specified.
Problem Analysis Result The UART software driver is responsible for all UART instances. The described problem has been reproduced on a test FPGA design with two different UART instances having two different base clocks (29.4912 MHz and 66 MHz, the two typical base clocks in our systems).
Project Impact/symptom If there are UARTs with different base clocks in the system, some of the UARTs would not communicate with the correct baudrate.
Problem change suggestion Introduce a new UART software driver parameter of type string (which overrides baud_base) for being able to specify a different baud base for each of the UART instances.