Resolved! Why do I get wrong data by SPI?
/* USER CODE BEGIN 2 */ // CS pin should befault high HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET); uint8_t TX_Data[13] = "Hello World!"; uint8_t RX_Data[13]; /* USER CODE END 2 */ while (1) { /* USER CODE END WHILE */ ...