data transmission via UART

[serg1980]

why does an error occur when transmitting data via UART?

Code: Select all

const unsigned int   EOS  = 0xF9F9;
.......
 UART1_Write(Hi(EOS));// Operator '&' is not applicable to these operands 'EOS' Hr_Nd_Blt.c
 UART1_Write(Lo(EOS));// Operator '&' is not applicable to these operands 'EOS' Hr_Nd_Blt.c

at the same time, if you pass the value of a constant to some variable, there is no error

Code: Select all

const unsigned int   EOS  = 0xF9F9;
unsigned int  data;
......
data = EOS;
UART1_Write(Hi(data));// OK
UART1_Write(Lo(data));// OK

[serg1980]

how can I pass a constant via UART???

[IvanJeremic]

Hi,

You can use const data with functions only if the function strictly says that it uses const data.

Uart_write does not take const data, so you will have to use the solution you used in your seconds code.

Regards,

Ivan.

[serg1980]

Hi,

You can use const data with functions only if the function strictly says that it uses const data.

Uart_write does not take const data, so you will have to use the solution you used in your seconds code.

Regards,

Ivan.

Thanks for the answer