how i correct these errors
Please somebody can help me to correct my errors in stm32cubeide for stm32f401cdu6 project
../Core/Src/main.c: In function 'HAL_UART_RxCpltCallback':
../Core/Src/main.c:77:38: warning: assignment to 'char' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
77 | rxbuffer[bufferIndex]="\0";
| ^
../Core/Src/main.c:84:37: warning: passing argument 2 of 'HAL_UART_Receive_IT' makes pointer from integer without a cast [-Wint-conversion]
84 | HAL_UART_Receive_IT(&huart6,uart_char,1);
| ^~~~~~~~~
| |
| char
In file included from ../Core/Inc/stm32f4xx_hal_conf.h:411,
from ../Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal.h:29,
from ../Core/Inc/main.h:30,
from ../Core/Src/main.c:20:
../Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal_uart.h:748:75: note: expected 'uint8_t *' {aka 'unsigned char *'} but argument is of type 'char'
748 | HAL_StatusTypeDef HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size);
| ~~~~~~~~~^~~~~
../Core/Src/main.c: In function 'processsms':
../Core/Src/main.c:91:17: warning: implicit declaration of function 'sendcommand2' [-Wimplicit-function-declaration]
91 | sendcommand2("We Have Mesaj");
| ^~~~~~~~~~~~
../Core/Src/main.c: At top level:
../Core/Src/main.c:103:6: warning: conflicting types for 'sendcommand2'; have 'void(char *)'
103 | void sendcommand2 (char * cmdx)
| ^~~~~~~~~~~~
../Core/Src/main.c:91:17: note: previous implicit declaration of 'sendcommand2' with type 'void(char *)'
91 | sendcommand2("We Have Mesaj");
| ^~~~~~~~~~~~
../Core/Src/main.c: In function 'main':
../Core/Src/main.c:157:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
157 | HAL_UART_Receive_IT(&huart2,(uint8_t *)uart_char,1);