topic Re: UCC UART Speed in P-Series

UCC UART Speed

naveennaga — Tue, 18 Aug 2015 09:01:31 GMT

Hi All,

We are using p1021 processor in our project. Quick engine UCC will be used as UART in synchronous mode. We want to achieve 2 Mbps with UCC configured in slow protocol and UART in NSMI mode.

Can we achieve with slow protocol UCC UART? If so can you guide to the register configuration for clock setting and other.

Re: UCC UART Speed

Pavel — Thu, 20 Aug 2015 06:28:08 GMT

Look at the Section 17.1, 17.1.3.2 and Table 17-6 of the QUICC Engine Block Reference Manual (https://www.freescale.com/webapp/Download?colCode=QEIWRM&location=null&fpsp=1&WT_TYPE=Reference%20Manuals&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation&fileExt=.pdf&Parent_nodeId=1258562392919739122055&Parent_pageType=product).

The P1021 UCC UART supports 2 Mbps with UCC configured in slow protocol and UART in NSMI mode.

Freescale offers CPM performance calculator for the MPC82xx (http://www.freescale.com/webapp/sps/download/license.jsp?colCode=MPC8260CALC2&location=null&Parent_nodeId=Y966660042762&Parent_pageType=product).

This calculator can be used as lower estimation UCC UART.

Have a great day,
Pavel

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Re: UCC UART Speed

naveennaga — Thu, 20 Aug 2015 12:04:50 GMT

Thank You Pavel.

I'm referring the ucc_uart.c low driver code from QorIQ 1.7 SDK to

implement the synchronous UART with enabling RTS,CTS,CD and DTR , DSR ,RI

as gpios .

Is there any sample device tree for enabling these control signals and code

for control of this signals during Tx and Rx.

Re: UCC UART Speed

Pavel — Fri, 21 Aug 2015 07:23:50 GMT

Look at the following page:

http://www.freescale.com/infocenter/index.jsp?topic=%2FQORIQSDK%2F2151457.html

This driver can be used as example using additional signals of the RS-232.

Have a great day,
Pavel