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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
By "HAL", I assume you mean the STM32 HAL here?
Note that the STM32 HAL has nothing to do with Keil - it is entirely ST's thing.
ST Document it here:
UM1725 User Manual Description of STM32F4 HAL and LL drivers www.st.com/.../jcr:content/translations/en.DM00105879.pdf
"HAL_UART_Transmit ... But, that one is for characters only"
No, it isn't - it just transmits a buffer of any arbitrary data. That's why it takes a pointer & length as parameters - rather than a string.
But, if you want to convert numbers to strings, that is a standard 'C' question - nothing to do with ST or Keil. Take a look in your 'C' textbook at the section on the Standard Library functions...
Or here's an online listing of the Standard 'C' Library functions: www.cplusplus.com/.../
char buffer[16]; int i = 15; HAL_UART_Transmit(&huart2, (uint8_t*)buffer, sprintf(buffer, "%d", i), 500);
itoa() might be another choice. Breaking down a number into decimal digits should be something basic math skills should cover.
hello mr pier , thanks for sharing the code
i have already tried your code by using sprintf() and itoa() and the result is same.let me explain it, the number will split into buffer one by one.
num = 49 // sprinf() or itoa() method buffer [0] = 4 buffer [1] = 9
maybe what he meant was to send a buffer with one variable
buffer [0] = 49
Why are you waking-up a thread that has been dead for over 2 years?
You seem to be confusing the numerical values with ASCII character codes.
If you want to send the value 49 (ie, 0x31) as ASCII coded, human-readable text, then you need to send the character '4' followed by the character '9'
ie, in your example:
buffer [0] = '4'; buffer [1] = '9';
That's not what the question asks, reread it
uint8_t ctrlZin = 0x1A;
HAL_UART_Transmit(&huart1, &ctrlZin, 1, 100);
this has worked for while sending ctrl+z (hex value 1A) on uart to GSM board, for SMS sending.
I honestly don't know why these old threads are kept open for years, and subject to irrelevant answers