SX1278C51测试代码.zip_SX1278 LORA_c51驱动Sx1278_sx1278 C51_sx1278 收发_

#include "sx1278.h" #include "spi.h" #include "delay.h" #include "led.h" void LowReset(void) { P2MDOUT = 0x04; //p2.3 0000 1000 XBR1 = 0x40; SX1278RST = 0; delayMs(100); SX1278RST = 1; delayMs(100); } void ManualReset(void) { LowReset(); } void SetCarriFrequency(void) //433m { spiWrite(RegFrfMsb,0x6c); spiWrite(RegFrfMsb,0x80); spiWrite(RegFrfMsb,0x00); } // switch mode in LORA void Lora_Switch_Mode(uchar mode) { spiWrite(RegOpMode,LoraModeMask|mode); } // lora rx config void LORA_Rx_Config(void) { //434M the value is 0x6C8000 SetCarriFrequency(); // bandwidth is 125k, ECC=4/6, explicit header mode //带宽125k，编码率4/6，显示报头模式 // (BW)0111 (ECC)010 (implicit)1 = 0x75 spiWrite(RegModemConfig1,0x75); // SF=12 4096 chips/symbol :1010 //扩频因子12，单包发送，16位crc关闭 // single packet is sent :0 // RXpayloadCRC(header indicate CRC off) :0 // RX time out MSB =0x00; :00 spiWrite(RegModemConfig2,0xC0); // Lna gain set by register LnaGain spiWrite(RegModemConfig3,0x00); // preamble length =12 (register set to 8) spiWrite(RegPreambleMsb,0x00); spiWrite(RegPreambleLsb,0x08); // payload length is 21 bytes spiWrite(RegPayloadLength,0x08); // Enable IRQ MASK spiWrite(RegIrqFlagsMask,0xb7); spiWrite(RegDioMapping1,0x00); //0000 0000 // Set the base address in FIFO data buffer for RX spiWrite(RegFifoRxBaseAddr,0x00); } /*-------------------------------------------------------------*/ // lora tx config void LORA_Tx_Config(void) { // 434M the value is 0x6C8000 SetCarriFrequency(); // Output Power spiWrite(RegPaConfig,0x8F); // set power to 20dbm spiWrite(RF96RegPaDac,0x87); // bandwidth is 125k, ECC=4/6, explicit header mode // (BW)0111 (ECC)010 (implicit)1 = 0x75 spiWrite(RegModemConfig1,0x75); // SF=12 4096 chips/symbol :1010 // single packet is sent :0 // RXpayloadCRC(header indicate CRC off) :0 // RX time out MSB =0x00; :00 spiWrite(RegModemConfig2,0xC0); spiWrite(RegModemConfig3,0x00); // preamble length =12 (register set to 8) spiWrite(RegPreambleMsb,0x00); spiWrite(RegPreambleLsb,0x08); // payload length is 5 bytes spiWrite(RegPayloadLength,0x08); // Enable IRQ MASK spiWrite(RegIrqFlagsMask,0xB7); spiWrite(RegDioMapping1,0x40); //0100 0000 // Set the base address in FIFO data buffer for TX spiWrite(RegFifoTxBaseAddr,0x80); } /************************* RX init**************************/ void LORA_RxInit(void) { ManualReset(); //this->Enter_Lora_mode(); Lora_Switch_Mode(Lora_MODE_SLEEP); LORA_Rx_Config(); } /******************** TX init*********************************/ void LORA_TxInit(void) { ManualReset(); //this->Enter_Lora_mode(); Lora_Switch_Mode(Lora_MODE_SLEEP); //仅在睡眠模式或者待机模式下可写，此处切换到睡眠模式 LORA_Tx_Config(); } // transmission of LORA mode void LORA_SendMessage(uchar *p, uchar len) { int i=0; uchar val; //Request StandBy mode Lora_Switch_Mode(Lora_MODE_STDBY); //睡眠模式下无法访问fifo数据，并且自动清空fifo，此处切换到 // spiWrite(RegDioMapping1,0x40); // wait until the crystal oscillator wake up delayMs(5); do { val=spiRead(RegOpMode); if (val&Lora_MODE_STDBY) { break; } } while(1); //lora_uart.vUartPutString("enter standby mode"); //lora_uart.vUartNewLine(); // write data FIFO // set the address pointer in FIFO data buffer to TXBaseAddress(0x80) spiWrite(RegFifoAddrPtr,0x80); spi_writeFIFO(p,len); //Request Tx mode Lora_Switch_Mode(Lora_MODE_TX); i=0; do { val=spiRead(RegIrqFlags); if (val&TXDONE) { break; } i++; delayMs(100); if (i>=100) { break; } } while(1); //automate change to StandBy mode do { val=spiRead(RegOpMode); if (val&Lora_MODE_STDBY) { //lora_uart.vUartPutString("enter standby mode agian"); //lora_uart.vUartNewLine(); break; } } while(1); // switch to sleep mode Lora_Switch_Mode(Lora_MODE_SLEEP); } uchar LORA_GetMessage(uchar *p,uchar len) { int i; uchar val; //Request StandBy mode Lora_Switch_Mode(Lora_MODE_STDBY); // wait until the crystal oscillator wake up delayMs(5); do { val=spiRead(RegOpMode); if (val&Lora_MODE_STDBY) { break; } } while(1); // set the address pointer in FIFO data buffer to RXBaseAddress(0x80) spiWrite(RegFifoAddrPtr,0x00); //Request SingleRX mode Lora_Switch_Mode(Lora_MODE_RXCONTINUOUS); i=0; do { val=spiRead(RegIrqFlags); if (val&RXDONE) { spiWrite(RegIrqFlags,0xff); break; } i++; delayMs(100); if (i>=250) { break; } } while(1); // automate to standby mode // read data // set the address pointer in FIFO data buffer to RXBaseAddress(0x80) if (i>=250) { return 0x00; } else { spiWrite(RegFifoAddrPtr,0x00); spi_readFIFO(p,21); spiWrite(RegIrqFlags,0xff); return len; } } // the function below is user interface void Init(void) { LORA_Tx_Config(); LORA_Rx_Config(); } // enter LORA modulation mode void Enter_Lora_mode(void) { ManualReset(); spiWrite(RegOpMode,0x80); Init(); } /*************** transmit payload**************************/ void SendMessage(uchar *p, uchar len) { LORA_SendMessage(p,len); } /************* receiver payload*****************************/ uchar GetMessage(uchar *p,uchar len) { return(LORA_GetMessage(p,len)); } //end file