send-and-receive-data-DMA-interrupt.zip_dma中断_interrupt dma

/****************************************************************************** * 物联网黑手党出品 ******************************************************************************* 文件名: mac.c 目标硬件: cc1110/CC2510 作者: 罗一鸣 修改日期: 2011-3-18 版本: 1.3.2 Description: MAC层的收发控制 设置了Tx Cache和Rx Cache。 Tx Cache 设置的默认CSMA时间是250毫秒，一次发送，有应答请求。如果没有应答，应 在用户层手动设置应答。而如果模块收到应答请求，而有Tx Cache处于等待发送或者等待应 答，则优先发送Ack。 由于超时调度函数是用于CSMA监听和ACK接受，在收到ACK时，应停止MAC超时触发函数 调度。 ******************************************************************************/ #include "hal_rf.h" #include "mac_timer.h" /* Tx Status */ #define MAC_TX_STA 0x0F #define MAC_TX_IDLE 0x00 #define MAC_TX_CSMA 0x01 #define MAC_TX_ALLOW 0x02 // #define MAC_TX_ING 0x03 // Transmiting #define MAC_TX_WAIT 0x04 // Wait Ack #define MAC_TX_END 0x05 // Tx is success #define MAC_TX_NOACK 0x06 // Tx is no ack #define MAC_TX_FAIL 0x07 // Tx is fail /* ACK STA */ #define MAC_TX_ACKEN 0x10 /* CSMA EN */ #define MAC_TX_FAST 0x20 /* Tx Retry Time */ /* Define Mac Packet */ #define MAC_HEAD_PAD(x) ((MacHead_t*)(x)) //RF_DMA_PACKET MacTxCache; typedef struct{ BOOL en; UINT8 sta; MacHead_t ack; }MacAck_t; /* Globle FIFO */ UINT16 MacRxTime; RF_DMA_PACKET* MacRxDma = 0; MacRxPkt_t MacRxCache; MacTxPkt_t MacTxCache; MacHead_t MacAck; void (*AckCallbackStore)(void); UINT8 AckTimeoutStore; /* */ UINT8 MacMyAddr; /* Rx Call back & Tx Call back */ void (*MacTxCb)(MacBuff_t* buff,UINT8 event,UINT8 sta); void (*MacRxCb)(MacBuff_t* buff,UINT8 len,UINT8 rssi,UINT16 time); /* MAC TIMER FUNTION */ UINT8 MacTimeoutKeep(MacTimerCb_t*); void MacTimeoutSetCb(UINT8 time,void (*cb)(void)); void MacTimeoutClean(void); void MacTimerPoll(void); /*------------------------------------------------------------------------------ MAC in RF Interrupt's Funtion ------------------------------------------------------------------------------*/ void HalRfTxFinishIsr(RF_DMA_PACKET* pkt,UINT8 evt) { //If Tx Ack , pass if(MacTxCache.event == evt && (MacTxCache.sta & MAC_TX_STA) == MAC_TX_ING) //Tx Normal Data { if((MacTxCache.sta & MAC_TX_ACKEN) == MAC_TX_ACKEN) { MacTxCache.sta = MAC_TX_WAIT; //MAC_TX_ACKEN is Cleaned } else { MacTxCache.sta = MAC_TX_END; } } } void HalRfRxFinishIsr(RF_DMA_PACKET* pkt,UINT16 time) { UINT8 len = pkt->len; MacBuff_t* buff = (MacBuff_t*)pkt->buff; //CRC chech; if(!(pkt->buff[len+1] & 0x80)) //Check Crc is Ok? Or give up this packet { pkt->len = 0; //clean dma. return; } //set buff //Address Detect if(buff->DestAddr != MacMyAddr && buff->DestAddr != 0xFF) { pkt->len = 0; //clean dma return; } //Ack Req Proccess if((buff->Cmd & MAC_ACK_MSK) == MAC_ACK_ASW) { //Rx a ack if(MacTxCache.event == buff->Event) //ack is for now Tx packet { pkt->len = 0; if(MacTxCache.sta == MAC_TX_WAIT) { MacTxCache.sta = MAC_TX_END; //ACK is Ok } return ; } } //Rx Payload,Read Dma buffer,and Clean it. if(MacRxCache.len == 0) //if Rx Cache is empty,push dma to cache { pkt->len = 0; //clean dma MacRxCache.len = len; MacRxCache.rssi = pkt->buff[len]; MacRxCache.time = time; memcpy(&MacRxCache.buff,buff,len); } else //if chache is full,keep dma and push it to cache when cache empty. { MacRxTime = time; MacRxDma = pkt; } } /*------------------------------------------------------------------------------ MAC in Poll's Funtion ------------------------------------------------------------------------------*/ /* Mac Random Ms Timeout */ UINT8 MacRandomGet(void) { UINT8 random = 0; GET_RANDOM_BYTE(random); do{ GET_RANDOM_BYTE(random); random &= 0x07; }while(random == 0); return random; } /* CSMA Start */ void MacCsmaCb(void) { if(MacTxCache.len) { if((MacTxCache.sta & MAC_TX_STA) == MAC_TX_CSMA) //timeout is finish { MacTxCache.sta &= 0xF0; MacTxCache.sta |= MAC_TX_ALLOW; //if it is Txing,wait it finish. } } } void MacWaitAckCb(void) { if(MacTxCache.len) { if((MacTxCache.sta & MAC_TX_STA) == MAC_TX_WAIT) { MacTxCache.sta &= 0xF0; MacTxCache.sta |= MAC_TX_NOACK; } } } void MacTxAck(void) { HalRfSendFast((UINT8*)&(MacAck),4,MacAck.Event); } /*------------------------------------------------------------------------------ MAC polls,include RxPoll,TxPoll and TxEndPoll MAC层内部函数，用于NWK层调度。 ------------------------------------------------------------------------------*/ /* Tx Poll , if there is data to be send and the channel is clear,send all data*/ void MacTxPoll(void) { if(MacTxCache.len) //TxBuffer is Full,wait to be send { if((MacTxCache.sta & MAC_TX_STA) == MAC_TX_ALLOW) //try to send { if(MacTxCache.sta & MAC_TX_FAST) //CSMA IS OFF { HalRfSendFast((UINT8*)&MacTxCache.buff,MacTxCache.len,MacTxCache.event); //No Csma MacTxCache.sta &= 0xF0; MacTxCache.sta |= MAC_TX_ING; //If Need Wait Ack? if((MacTxCache.sta & MAC_TX_ACKEN) == MAC_TX_ACKEN) { MacTimeoutSetCb(32,MacWaitAckCb); } } else { if(HalRfSend((UINT8*)&MacTxCache.buff,MacTxCache.len,MacTxCache.event)) //SEND CSMA { MacTxCache.sta &= 0xF0; MacTxCache.sta |= MAC_TX_ING; //If Need Wait Ack? if((MacTxCache.sta & MAC_TX_ACKEN) == MAC_TX_ACKEN) { MacTimeoutSetCb(32,MacWaitAckCb); } } else //channel is busy { UINT8 random = MacRandomGet(); //ACK,16ms CSMA if(MacTxCache.timeout) //CSMA timeout is still { if(MacTxCache.timeout > random) { MacTxCache.timeout -= random; } else { random = MacTxCache.timeout; MacTxCache.timeout = 0; } MacTxCache.sta &= 0xF0; MacTxCache.sta |= MAC_TX_CSMA; MacTimeoutSetCb(random,MacCsmaCb); } else //CSMA timeout is runout { MacTxCache.sta &= 0xF0; MacTxCache.sta |= MAC_TX_FAIL; } } } } } } void MacTxEndPoll(void) { if(MacTxCache.sta == MAC_TX_END || MacTxCache.sta == MAC_TX_FAIL || MacTxCache.sta == MAC_TX_NOACK) { UINT8 sta = MacTxCache.sta; MacTimeoutClean(); MacTxCache.len = 0; MacTxCache.sta = MAC_TX_IDLE; if(MacTxCb) { sta -= MAC_TX_END; MacTxCb(&MacTxCache.buff, MacTxCache.event, sta); } } } void MacRxEndPoll(void) { if(MacRxCache.len) { if((MacRxCache.buff.Cmd & MAC_ACK_MSK) == MAC_ACK_REQ) { //Send Ack MacAck.DestAddr = MacRxCache.buff.SrcAddr; MacAck.SrcAddr = MacMyAddr; MacAck.Cmd = MAC_ACK_ASW; MacAck.Event = MacRxCache.buff.Event; MacTxAck(); } if(MacRxCb)//run rx callback { MacRxCb(&MacRxCache.buff,MacRxCache.len - 4,MacRxCache.rssi,MacRxCache.time); } // Clean Rx Cache MacRxCache.len = 0; // If Rx Dma have new data,copy to Rx Cache. if(MacRxDma && MacRxDma->len) { UINT8 len = MacRxDma->len; MacRxDma->len = 0; MacRxCache.len = len; MacRxCache.rssi = MacRxDma->buff[len];