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
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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