Hi, Experts.
As title description, this setting should be appear in "SPIExternalDevice" tab, but I do not find this setting.
I found MCAL driver documents writes as below.
My question is :
How to set fSPI frequency in EB Tresos?
How to set CLKD frequency in EB Tresos?
Many Thanks
Gibbs
Hi,
Please find the details below.
SPI Baud Rate Calculation:
Baud rate = fSPI / CLKD
Where fSPI – SPI Functional clock frequency. fSPI can be set from MCU clocksetting configuration, where user can configure clock source(as per TRM) and clock division value for required fSPI (fSPI=clk/clkdiv+1).
Refer the figure below:
CLKD – Prescalar clock divider (SpiExtDeviceClockDivider value as per EBtresos Configuration).SpiExtDeviceClockDivider can be set from EBtresos as in below figure:
CLKD value should be set such a way to get the expected baudrate as per calculation below:
For example, if fSPI of MCSPI is 50 MHz:
#. For Baudrate = 50Mbps , CLKD should be given as 0 , calculation will be as following
Baudrate = 50/(0+1) = 50Mbps
#. For Baudrate =25Mbps ,CLKD should be given as 1 , calculation will be as following
Baudrate = 50/(1+1) = 25Mbps
