43: error: invalid use of incomplete typedef 'uart_handle_t' {aka 'struct uart_handle'}

[sai_sankar_rao_R]

Hi all,

I am a new member to stm controllers.

i am using B-L072z-LRWAN1 & SUB IOT STACK.

While iam using wrapper class functions i am able to see the output of my code

uart_handle_t* uart_0;

uart_0 = uart_init(0,9600,0);

uart_enable(uart_0);

uart_send_byte(uart_0,0x07);

but while i am trying to send data using hal function i am facing this

error

error: invalid use of incomplete typedef 'uart_handle_t' {aka 'struct uart_handle'}

code

uart_handle_t* uart;

uart = uart_init(0,9600,0);

uart_enable(uart);

uint8_t data = 0x55;

uint8_t *pdata = &data;

HAL_UART_Transmit(&uart->handle, &data, 1, HAL_MAX_DELAY);

but please also have look at wraper class code

void uart_send_byte(uart_handle_t* uart, uint8_t data) {

HAL_UART_Transmit(&uart->handle, &data, 1, HAL_MAX_DELAY);

}

please help, thanks in advance

[STTwo-32]

Hello @sai_sankar_rao_R 

Can you give more details about your issue (detailed description of the project, Error context, Some creenshoots,...).

Best Regards.

STTwo-32

[sai_sankar_rao_R]

[Karl Yamashita]

You need to show your uart_handle_t structure. It's probably missing UART_HandleTypeDef and if handler is it, I don't see where you initialized it with a instance?

[Andrew Neil]

Please use this button to properly post source code:

[Tesla DeLorean]

Do you have the actual typedef, or any, in this file or it's includes?

If not, probably wants you to explicitly describe the pointer

struct uart_handle_t* uart_0;