USART Communication with PC (stm8al3l68)

[AJT]

Hello,

I'm trying to implement serial communication between a stm8al3l68 an a serial terminal installed on my PC.

The problem is that there is no virtual port on my STM8 as on STM32.

How can I communicate with the PC if there is no virtual Port. What kind of hardware should i buy ?

--> HCCABL0015 USB to RS232 TTL Serial Interface Cable like explained there : http://www.colecovision.eu/stm8/STM8S-DISCOVERY%20Serial.shtml

And when I'll have this hardware, i just have to init USART with :

STM_EVAL_COMInit(COM1, (uint32_t)115200, USART_WordLength_8b, USART_StopBits_1,
 USART_Parity_No, (USART_Mode_TypeDef)(USART_Mode_Tx | USART_Mode_Rx));
USART_Cmd(EVAL_COM1, ENABLE);

and send data with

void USART_SendData8(USART_TypeDef* USARTx, uint8_t Data)

Another question, how can I know if I have to include stm8l1526_eval.h or stm8l1528_eval.h header files ?

I'm really lost with STM8 MCU, need some help ! Thank you all !

Best Regards,

AJT

[Cristian Gyorgy]

"How can I communicate with the PC if there is no virtual Port" - The STM8 has a real hardware USART port, much like an STM32. If you want to use it to communicate with a PC, you will need on the PC side another USART port, with same voltage levels (3.3V). If you don't have it, you will need a converter in between.

In case you use an ST development board, it might already have all you need, through a USB interface.

My advice: don't try to do all in 30 min with 20 mouse clicks! Take the time to understand what you work with, and surely this time will be rewarded.

[AJT]

Hello Cristian, thanks for you answer !

First of all i'm going to check is something is sent via STM8AF_USART_TX with an oscilloscope.

Then i'll try to use this (because i found one) : https://www.st.com/en/development-tools/stlink-v3set.html

Sounds like i can create a virtual com port with that but I don't really know to what should I connect STM8AF_USART_TX and STM8AF_USART_RX. Well, to my mind i must connect STM8AF_USART_TX to stlink-v3 RX and STM8AF_USART_RX to stlink-v3 TX.

Here are some screenshots to explain why i should do that :

Screenshot of stlink-v3 datasheet that talks about VCP

Screen shot of STM8AL3L68 datasheet

 

and finally a screen of the hardware board MB1440 that is included in stlink-v3

Tell me if I'm wrong !

Best Regards,

AJT

[AJT]

Ok i found the solution, the problem came from SB4 and SB5 that there were not Fitted