CAN的API原来升级过一次，旧的接口已经不用了，虽然还看得到

叶孤城999 · 发表于 2020-6-30 15:34:12

之前用UART ，SPI ，都是用的类似这样的接口
HAL_XXX_Transmit
HAL_XXX_Receive
到了CAN接口，发现库里面还有

HAL_CAN_Transmit，HAL_CAN_Receive，但是原子哥用的却是HAL_CAN_AddTxMessage这样的接口。百度了一下几乎没有HAL_CAN_Transmit的例子，都是用HAL_CAN_AddTxMessage。
觉得很疑惑。
而看HAL库代码来找两个API的区别，根本不可能，CAN都还不会用就想搞懂两个接口的区别是不可能的。
于是谷歌了一下，发现原来是升级了一次，，，，不用纠结两个接口有什么区别，直接用新接口即可。

HAL_CAN_Init() is split into both HAL_CAN_Init() and HAL_CAN_Start()
HAL_CAN_Transmit() is replaced by HAL_CAN_AddTxMessage() to place Tx request, then HAL_CAN_GetTxMailboxesFreeLevel() for polling until completion
HAL_CAN_Transmit_IT() is replaced by HAL_CAN_ActivateNotification() to enable transmission with interrupt mode, then HAL_CAN_AddTxMessage() to place Tx request
HAL_CAN_Receive() is replaced by HAL_CAN_GetRxFifoFillLevel() for polling until reception, then HAL_CAN_GetRxMessage() to get Rx message
HAL_CAN_Receive_IT() is replaced by HAL_CAN_ActivateNotification() to enable reception with interrupt mode, then HAL_CAN_GetRxMessage() in the receive callback to get Rx message
HAL_CAN_Sleep() is renamed to HAL_CAN_RequestSleep()
HAL_CAN_TxCpltCallback() is split into HAL_CAN_TxMailbox0CompleteCallback(), HAL_CAN_TxMailbox1CompleteCallback() and HAL_CAN_TxMailbox2CompleteCallback()
HAL_CAN_RxCpltCallback() is split into HAL_CAN_RxFifo0MsgPendingCallback() and HAL_CAN_RxFifo1MsgPendingCallback()