Sending hexadecimal number over uart using STM32F407VG

[GSING.19]

Dear All,

I need to send hexadecimal number over uart using STM32F407VG. How can I do that?

Regards,

Gunit

[S.Ma]

Ideally create a generic printf function.

Otherwise, just hardcode what you need.

If it's a byte, it would like: (unoptimized)

uint8_t data = 0x9D; // example
uint8_t ch,hexdigit;
 
hexdigit = data>>8; // MSB '9'
ch = hexdigit + (hexdigit<0x0A)? '0' : 'A' ;
Transmit(ch);
 
hexdigit = data & 0xFF; // LSB 'D'
ch = hexdigit + (hexdigit<0x0A)? '0' : 'A' ;
Transmit(ch);
 
 
 
 
 
 

[Tesla DeLorean]

Seems like some pretty basic C programming stuff...

see also sprintf() and itoa() usage

http://www.cplusplus.com/reference/cstdlib/itoa/

[GSING.19]

HAL_UART_TRANSMIT function accepts uint8_t as its second argument.

Hence convert hex to int and then transmit

https://www.includehelp.com/c-programs/convert-hexadecimal-to-integer.aspx

[AvaTar]

I agree with the other posters.

And want to add, you see the problem the wrong way.

You want to send a string, that happens to be interpretable (represent) as hexadecimal number.

[Piranha]

Maybe this isn't the case, but it should be reminded, that if both sides of connection are custom made, then the most effective format is of course binary data packets.