这个作者很懒，想到什么就写什么！
写在前面：这个是记录学习LL库的踩坑系列，这个资料很少，想要找例程可以在电脑用户文件下的STM32Cube\Repository里，前提是下载好那个单片机的pack，部分没有例程的可以借鉴同系列的文件。
生成的代码还需要添加 SPI添加
LL_SPI_Enable();加一个SPI读写共用函数
uint8_t SPI1_ReadWriteByte(uint8_t TxData) { uint8_t retry = 0; /* Check if Tx buffer is empty */ while (!LL_SPI_IsActiveFlag_TXE(SPI1)) { retry++; if(retry > 200) return 0; } /* Write character in Data register. TXE flag is cleared by reading data in DR register */ LL_SPI_TransmitData8(SPI1, TxData); retry = 0; /* Check if Rx buffer is not empty */ while (!LL_SPI_IsActiveFlag_RXNE(SPI1)) { retry++; if(retry > 200) return 0; } /* received byte from SPI lines. */ return LL_SPI_ReceiveData8(SPI1); }注意STM32F302系列的需要增加才能正常运行
LL_SPI_SetRxFIFOThreshold(SPI1, LL_SPI_RX_FIFO_TH_QUARTER);UART添加函数
如果配置为中断接收模式
一. 使能中断接收
/* Clear Overrun flag, in case characters have already been sent to USART */ LL_USART_ClearFlag_ORE(); /* Enable RXNE and Error interrupts */ LL_USART_EnableIT_RXNE();二. 添加中断处理函数
/** * @brief Function called from USART IRQ Handler when RXNE flag is set * Function is in charge of reading character received on USART RX line. * @param None * @retval None */ void USART1_CharReception_Callback(void) { __IO uint8_t received_char; /* Read Received character. RXNE flag is cleared by reading of RDR register */ received_char = LL_USART_ReceiveData8(USART1); }三. 在对应的中断函数文件下
/** * @brief This function handles USART1 global interrupt. */ void USART1_IRQHandler(void) { /* USER CODE BEGIN USART1_IRQn 0 */ /* Check RXNE flag value in SR register */ if(LL_USART_IsActiveFlag_RXNE(USART1) && LL_USART_IsEnabledIT_RXNE(USART1)) { /* RXNE flag will be cleared by reading of DR register (done in call) */ /* Call function in charge of handling Character reception */ USART1_CharReception_Callback(); } /* USER CODE END USART1_IRQn 0 */ /* USER CODE BEGIN USART1_IRQn 1 */ /* USER CODE END USART1_IRQn 1 */ }加一个串口发送的
unsigned short int UART_W(USART_TypeDef *USARTx,unsigned char *pbuf,unsigned short int len) { while (len--) { LL_USART_TransmitData8(USARTx, *pbuf); while (!LL_USART_IsActiveFlag_TXE(USARTx)); pbuf ++ ; } return len ; }