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Hi,
I'm using MSP430F5529 launchpad and I need to transfer data to PC via usb cable as fast as possible.
When I was trying to use USCI_A1 (P4.4 & P4.5) UART and BRCLK=SMCLK=20MHz, the max baud rate I can get is 460800 via MSP Application UART1, but in the datasheet, the max baud rate is 1MHz. I tried this link:
to calculate the configuration values but it did't work for 921600 or 1M. So could anyone tell me what are the values of
clockPrescalar, firstModReg, secondModReg and overSampling to get a 1M baud rate from 20M BRCLK?
Thank you.
Regards,
Eric
Eric Tian61 said:Hi zrno,
So the CDC / UART bridge software limits the baud rate From LP to PC via USB cable so it can not go over 1Mbps? If I connect UCA1RXD to UCA1TXD over 100 ohm resistor, I can get 1Mbps?
Eric
I don't work with TI LP's and don't know about FET CDC/UART software limitation. My flasher with dual CDC / UART bridge can go over 1 Mbps.
http://forum.43oh.com/topic/2972-sbw-msp430f550x-based-programmer/?p=53730
Picture is not visible for 43oh non-members, it is attached here.
If you need high speed UART transfer, run MSP430 on 24 MHz by XT2, and use dedicated bridge chip / cable like PL2303HXD. MSP430F5529 has USB hardware module that can go with CDC / Bulk up to 1 MByte/s, and PC side with CDC is the same like for UART.
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