CodeWarrior Development ToolsのトピックRe: software uart for MC56F84442VLH

software uart for MC56F84442VLH

info53 — Fri, 05 Apr 2019 13:20:50 GMT

Hi all:

We are adding new features to a design that our client has based around MC56F84442VLH.

We need to have 3 uarts, and this DSC has only 2 hardware UARTs available (qsci0 and qsci1)

I can't find any processor expert component for software UART, although there is SW_SPI and SW_I2C.

Can somebody point me to a library or wich component I have to use? Thanks in advance.

Re: software uart for MC56F84442VLH

xiangjun_rong — Mon, 08 Apr 2019 03:25:05 GMT

Hi, Arturo,

As the following description, the MC56F84442 has only 2 qsci, I do not think it is easy to simulate another SCI module with the other module for example GPIO..., I suggest you select another DSC chip, for example MC56F84567/587, which have 3 qsci modules.

Hope it can help you

Xiangjun Rong

Re: software uart for MC56F84442VLH

info53 — Mon, 08 Apr 2019 16:18:36 GMT

We have to stay with the same processor >< .

Do we have to write it from scratch? Or is some code already available?

Thanks again xiangjun.rong.

Re: software uart for MC56F84442VLH

xiangjun_rong — Tue, 09 Apr 2019 02:51:33 GMT

Hi, Arturo,

As you know that the MC56F845xx and MC56F8444x are almost the same, the difference is the Flash size, RAM size, and the number of peripherals, so you do not need develop from scratch.

You can create a new project based on for example MC56F84565 on CW for mcu, then configure the PLL so that it can generate 60MHz clock. Then copy the code from original project to the new project, it is okay.

But it is difficult to extend a new SCI module.

Xiangjun Rong

Re: software uart for MC56F84442VLH

info53 — Tue, 09 Apr 2019 07:38:22 GMT

Ok, I'll ask the client to switch to a new dsc. Thanks a lot for your guidance xiangjun.rong.