Kinetis MicrocontrollersのトピックRe: convert data 16 bit to 8 bit so as to use UART

convert data 16 bit to 8 bit so as to use UART

nguyennhatminh — Tue, 17 Jun 2014 10:25:35 GMT

Hi Guys,

I'm working on KL05Z. I accomplished 12 bit ADC of temperature of MCU and now I wish to send the result to PC.

I used the 16 bit variant to content the result , when I try to cast (byte), for sending data ,the result become " #".

Do you know how to solve this problem ?

your reply will be highly appreciate ,

Thanks,

Minh.

waqasbutt — Tue, 17 Jun 2014 13:01:03 GMT

Hello Nguyen,

I can't understand your problem what do you mean by "the result becomes #"

Regards

Waqas Ehsan Butt

mjbcswitzerland — Tue, 17 Jun 2014 14:36:34 GMT

Usually one would send the value as ASCII coded hex (for example)

0x1234 from ADC could be sent as "1234" (4 bytes on the UART).

If you simply cast to a byte you will lose 8 bits of the value. You could also send as 2 binary values rather than 1 (0x1234 -> 0x12 + 0x34)

Regards

Mark

nguyennhatminh — Tue, 17 Jun 2014 14:47:20 GMT

Hi Waqas Butt,

uinit16_t Temp;

Temp=(25-(ADCR_temp-ADC_temp25)*100/ADC_m);

The result is in 16bit data. when I cast (byte) Temp. The result will be error , and I get " #" character.

MInh.

nguyennhatminh — Tue, 17 Jun 2014 14:49:09 GMT

Hi Mark,

Thank you for your reply,

I'll try it out.

Minh.