MQX Software SolutionsのトピックRe: MQX 4.0 touch panel

MQX 4.0 touch panel

wangtsungli — Tue, 04 Oct 2016 09:05:02 GMT

I'm using MQX 4.0 to develop touch driver, i wanna print float out but i can't do it.

i have already define XY to float.

But when i write the function printf("XY=%f\n",XY);

it do not print float out!

it print XY=f instead.

Please help me on this question why it won't print float out for me?

best regard

victor

Re: MQX 4.0 touch panel

danielchen — Sun, 09 Oct 2016 06:53:54 GMT

Hi Victor:

I think you need to check your MCU supports floating point.

If it supports, the following steps need to be done to support float point

1 the task, which will use floating point, should be use attribute; MQX_FLOATING_POINT_TASK attribute, please refer to the below code snippet:

2 in user_config.h of bsp project, MQX_INCLUDE_FLOATING_POINT_IO should be defined as 1, and rebuild the bsp and psp project

3 set the vfpv4 in IDE , if you use IAR, please see the below picture

I did a quick test with the tchres_demo, it can work, I added the following code for test

The output is :

Hope it helps

Have a great day,
Daniel

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Re: MQX 4.0 touch panel

wangtsungli — Tue, 11 Oct 2016 02:21:28 GMT

Sorry, i can't find vfpv4 on my develop environment ! Please see the

attachment.

I'm using Keil u Vision5 to develope!

best regard

Victor

2016-10-09 14:54 GMT+08:00 danielchen@fsl <admin@community.freescale.com>:

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Re: MQX 4.0 touch panel
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Re: MQX 4.0 touch panel

danielchen — Tue, 11 Oct 2016 06:04:24 GMT

For Keil, please check the floating point hardware at Target tab

Regards

Daniel

Re: MQX 4.0 touch panel

wangtsungli — Tue, 25 Oct 2016 07:06:44 GMT

Thank you! I have solved my problem!