Bad initialization?

UART2 RX TX initialization-how to use?
Hello, I have problem with initialization UART2 in my project(STM8S105). Below you can see part of my code, what am i doing wrong?
I'm trying to send sign to LCD display.

Code:

void UART2_Cmd(FunctionalState ENABLE); void UART2_InitGPS() { UART2_DeInit(); UART2_Init( (u32)9600, UART2_WORDLENGTH_8D, UART2_STOPBITS_1, UART2_PARITY_NO, UART2_SYNCMODE_CLOCK_DISABLE, UART2_MODE_TXRX_ENABLE); } void UART2_SendData8(u8 Data); u8 UART2_ReceiveData8(void); void main(void) { char tmp; LCD5110_init(); //function which initialize LCD LCD5110_set_XY(0,0); //function which set rows and columns in LCD UART2_SendData8(36);// UART2_ReceiveData8(); tmp = UART2_ReceiveData8(); LCD5110_write_char(tmp); //function which send characters to LCD }

I have to mention that i have no errors after compiling code and if I use function like this everything works fine(but I need UART to racive data from GPS and send it to LCD) :

Code:

void main(void) { char tmp=33; //33 -> "!" sign in my matrix(table or haw to name it) LCD5110_init(); //function which initialize LCD LCD5110_set_XY(0,0); //function which set rows and columns in LCD LCD5110_write_char(tmp); //function which send characters to LCD }

BR,
Oklem

P.S. If somebody wants to see whole code let me know :)

https://my.st.com/_layouts/images/blank.gif

return type of main is not void it's int

Quote:

Originally Posted by joybanerjee39

return type of main is not void it's int

He's working in a microcontroller... there's no OS to return to...

(And yes they ripped me about this one too...)

Off the top of my head I dont see you calling UART2_Init anywhere in the codepath. Also add a while(1); right at the end of main, who knows what the MCU does once the program end. If that still doesnt work make a small program along the paths of:

Code:

void main(void) { char tmp = 0; UART2_Init(...); UART2_SendData8('A'); tmp = UART2_GetData8(); LCD5110_write_char(tmp); while(1); }

Then get one of these:
USB TTL Serial

Solder it in place of the GPS (only need to solder RX, TX and GND) and try it with your computer to see if you can get the MCU to send 'A' to a terminal and see if you can send something to the MCU and have it show up on the LCD.

Quote:

Originally Posted by CommonTater

He's working in a microcontroller... there's no OS to return to...

(And yes they ripped me about this one too...)

oops! my bad!