Sending integers over USART as ASCII characters, using HAL Libraries

[salih kan]

Posted on February 27, 2018 at 09:17

Hello Everyone;

To send ASCII characters via USART I normally use Hal libraries and the function below;

HAL_UART_Transmit(&huart2, (uint_t*)'Hello', 6,10);

But, that one is for characters only.

How can I send the value of an integer over USART as its ASCII characters ? Which functions and libraries should I use ?

. .

. For example (dummy program just to show my purpose):

int i = ADC read value; //Lets say i=15

printf(i); //value should be sent in ASCII characters, so 1 and then 5 should be sent in ASCII.

. .

.

Thanks for your help, Kind regards

Salih

[Bogdan Golab]

Posted on February 27, 2018 at 10:08

You can use sprintf(char *buffer, char *formatted_string) to convert printf-like formatted string to a text (char * buffer for example)  then send this buffer through the HAL_UART_Transmit()

You can also implement some primitive function required by printf - I mean putchar() where the actual implementation will contain the HAL_UART_Transmit(). I used both approaches with Keil IDE.

[Bogdan Golab]

Posted on February 27, 2018 at 10:29

 ,

 ,

Something like that for the first option.

♯ include <,string.h>,

char buffer[100],

int a=15,

sprintf(buffer, '%d', a),

HAL_UART_Transmit(&,huart1, (uint8_t *)buffer, strlen(buffer), 1000) ,

assumed uart1

---------------------------------------------------------------

In case of using regular printf.

If you use Keil just google retarget.c to find Keil way of redirecting the printf to the UART.

[Andrew Neil]

Posted on March 03, 2018 at 19:37

This has already been answered in your cross-post on the Keil forum:

http://www.keil.com/forum/63397/

 

[Bogdan Golab]

Posted on March 03, 2018 at 19:44

Seems to be the same solution... or I cannot see the difference...

[Andrew Neil]

Posted on March 03, 2018 at 19:50

Yes - it is.

[Bogdan Golab]

Posted on March 03, 2018 at 19:56

Great. You know, I closely follow a few people here and try to understand every piece of what you say.

It's the only way for me to learn something from professionals