UART communication problem

[pensees]

Hi,

I'm using mikromedia+ for STM32 ARM board with STM32F407ZG MCU.

I try to UART communication with FT232 module using UART library.


// Code example
void Init_MCU() {

...

UART2_Init_Advanced(115200, _UART_8_BIT_DATA, _UART_NOPARITY, _UART_ONE_STOPBIT, &_GPIO_MODULE_USART2_PD5_PA3);
}

// Event Handler (when touchscreen pressed)
void touched() {

char* cmd = "Test";
char* receive;

...

UART2_Write_Text(cmd);

while (!UART2_Data_Ready());
receive[0] = (char)UART2_Read();

UART2_Write_Text("Receive Done");
}


Then I connect RX/TX pin to pin No. 47 & 48.

After compile and load to board then executed, but library functions don't work. (Nothing shows in terminal)


Please advice for me.
Thanks.

[filip.grujcic]

Hello,

Have you configured the MCU clock correctly in the Edit Project window (Ctrl + Shift + E)?
You can click on the Load Scheme button and look for a scheme which suits your set up. There are many for STM32F407ZG.

Regards,

[pensees]

Hi, filip

Thanks for your advice, I tried all configurations but still not work correctly.

For detail, I used STM32F407ZG_HSE_PLL_25MHz_to_168MHz configuration by default.

And I adjust MCU Clock Frequency to 150MHz.

What should I do more??

[filip]

Hi,

If you chosen the 168MHz profile, why did you enter 150 MHz frequency in the Device Clock input field ?

Regards,
Filip.

[pensees]

In VTFT settings, Hardware pattern is "Mikromedia_Plus_for_STM32_ARM" (default)

This pattern uses "VTFT_Mikromedia_Plus_for_STM32_HSE_PLL_25MHz_150MHz" scheme. (MCU frequency is 150MHz)


So, I matched scheme between General setting and VTFT setting. ("STM32F407ZG_HSE_PLL_25MHz_to_168MHz")

But it still not work correctly.

[filip.grujcic]

Hello,

Have you double checked that you didn't connect Rx to Rx and Tx to Tx by accident?

Kind regards,

[pensees]

Yeah, I checked several times.

(Pin &47 is Rx that connected FT232's Tx, Pin &48 is Tx that connected FT232's Rx)

* Pin &47 : _GPIO_USART2_RX_PA3
* Pin &48 : _GPIO_USART2_TX_PD5

[AntiMember]

Did you try to separate the problem?
Connect Pin 47 to Pin 48 and check in debug.

[pensees]

Yes, I checked separately and debug mode.

But still problem exists...


In case of Soft_Uart library, write (send) is ok. (Because it send only 1 character repeatly)

Read (receive) is partially worked. (For example, Host send 30 characters, the board just receives 1/5 ~ 1/6)

[pensees]

Thanks to everyone, solved using H/W UART6 module and pin &45/46.