ST25RU3993初始化时，PLL not locked

m261678889 提问时间：2020-3-4 21:39 /

问答
是否解决:

移植官方ST25RU3993 EVEL的代码，初始化到最后一步始终显示PLL not locked，不知道问题出在哪
æ æ é¢.png

初始化代码：
//读取版本
st25RU3993SingleRead(ST25RU3993_REG_DEVICEVERSION,&myBuf[0]);
if(myBuf[0] != 0x61)
{
return 1;
}
//晶体振荡器稳定
st25RU3993SingleRead(ST25RU3993_REG_AGCANDSTATUS,&myBuf[0]);
if((myBuf[0]&0x01) != 0x01)
{
return 2;
}
//检查SPI连接
myBuf[0] = 0x55;
myBuf[1] = 0xAA;
myBuf[2] = 0xFF;
myBuf[3] = 0x00;
st25RU3993ContinuousWrite(ST25RU3993_REG_MODULATORCONTROL1,myBuf,4);
memset(myBuf, 0x33, sizeof(myBuf));
st25RU3993ContinuousRead(ST25RU3993_REG_MODULATORCONTROL1,myBuf,4);
if((myBuf[0]!=0x55) ||
      (myBuf[1]!=0xAA) ||
      (myBuf[2]!=0xFF) ||
      (myBuf[3]!=0x00))
{
      return 3; // data bus interface pins not working ----ok
}

// //检查外部中断是否正常
Reset_En_Pin();
st25RU3993CLearIrqReg();
st25RU3993SingleWrite(ST25RU3993_REG_IRQMASK1, 0x20);//FIFO中断使能
// // set up 48Byte transmission, but we supply less, therefore a fifo underflow IRQ is produced
st25RU3993SingleWrite(ST25RU3993_REG_TXLENGTHUP, 0x03);
st25RU3993SingleCommand(ST25RU3993_CMD_TRANSMCRC);
st25RU3993ContinuousWrite(ST25RU3993_REG_FIFO,myBuf,4);
st25RU3993ContinuousWrite(ST25RU3993_REG_FIFO,myBuf,4);
st25RU3993ContinuousWrite(ST25RU3993_REG_FIFO,myBuf,4);
st25RU3993ContinuousWrite(ST25RU3993_REG_FIFO,myBuf,4);
st25RU3993ContinuousWrite(ST25RU3993_REG_FIFO,myBuf,4);
st25RU3993ContinuousWrite(ST25RU3993_REG_FIFO,myBuf,4);

st25RU3993WaitForResponse(RESP_FIFO);
if(!(st25RU3993GetResponse() & RESP_FIFO))
{
      return 4;
}

st25RU3993ClrResponse();
Reset_En_Pin();
st25RU3993SingleCommand(ST25RU3993_CMD_HOP_TO_MAIN_FREQUENCY);

// Device Status Control Register 0x00
// stby | - | agc_on | rec_on | rf_on
// 0  |0 0 0 0| 0 | 0 | 0 = 0x00
st25RU3993SingleWrite(ST25RU3993_REG_STATUSCTRL, 0x03);

// Protocol Selection Register 0x01
// RX_crc_n | dir_mode | AutoACK<1-0> | - | prot<2-0>
//    1 |    0 |    0 0    | 0 |  0 0 0 = 0x80
st25RU3993SingleWrite(ST25RU3993_REG_PROTOCOLCTRL, 0x80);

// Tx Options Register 0x02
//  - | TxOne<1-0> | - | Tari<2-0>
// 0 0|    1 1 | 0 | 0 0 0 = 0x30
st25RU3993SingleWrite(ST25RU3993_REG_TXOPTIONS, 0x30);

// Rx Options Register 0x03 --> Set by Gen2 Configuration
// TRcal High Register 0x04 --> Set by Gen2 Configuration
// TRcal Low Register 0x05  --> Set by Gen2 Configuration

/**********************************************************/
// Modulation Ctrl2 0x14
// del_len    | pr_ask | ook_ask
// 1 1 1 0 1 1 | 1 | 1    = 0xEF
st25RU3993SingleWrite(ST25RU3993_REG_MODULATORCONTROL2, 0xEF);

// Modulation Ctrl4 0x16
//    1stTari
// 1 0 0 0 1 0 0 1       = 0x89
st25RU3993SingleWrite(ST25RU3993_REG_MODULATORCONTROL4, 0x89);

// PLL Main Register 0x17
// - | RefFreq<2-0> | mB_val<9-6>
// 0 | 1 1 0    | 0 0 1 1 = 0x63
st25RU3993SingleWrite(ST25RU3993_REG_PLLMAIN1, 0x63);

// PLL Main Register 0x18
// mB_val<5-0> | mA_val<9-8>
// 1 1 1 0 1 1 | 0 1       = 0xED
st25RU3993SingleWrite(ST25RU3993_REG_PLLMAIN2, 0xED);

// PLL Main Register 0x19
// mA_val<7-0>
// 0 0 0 1 1 0 1 0 = 0x1A
st25RU3993SingleWrite(ST25RU3993_REG_PLLMAIN3, 0x1A);

st25RU3993SingleWrite(ST25RU3993_REG_MEASUREMENTCONTROL, 0x00);
// Miscellaneous Register 1 0x0D
// hs_output | hs_oad | miso_pd2 | miso_pd1 | open_dr | s_mix | -
//    0 | 0 | 1    | 1    | 0 | 0 |0 0 = 0x30
st25RU3993SingleWrite(ST25RU3993_REG_MISC1, 0x30);

st25RU3993SingleWrite(ST25RU3993_REG_MISC2, 0x40);

// REGULATOR and PA Bias Register 0x0B
// pa_bias<1-0> | rvs_rf<2-1> | rvs<2-0>
//    0 0    | 0 1 1 |  0 1 1 = 0x1B
st25RU3993SingleWrite(ST25RU3993_REG_REGULATORCONTROL, 0x1B);

// RF Output and LO Control Register 0x0C
// eTX<7-5> | - | eTx<3-0>
// 1 0 0  | 0 | 0 0 1 0  = 0x82
st25RU3993SingleWrite(ST25RU3993_REG_RFOUTPUTCONTROL, 0x82);

// Modulator Control Register 1 0x13
//  - | main_mod | aux_mod | - | e_lpf | ask_rate<1-0>
//  0 |    0 | 1 |0 0| 0 |    0 0    = 0x20
myBuf[0] = 0x20;

// Modulator Control Register 2 0x14
// ook_ask | pr_ask | del_len<5-0>
// 1 | 1 | 0 1 1 1 0 1  = 0xDD
myBuf[1] = 0xDD;

// Modulator Control Register 3 0x15
// trfon<1-0> | lin_mode | TX_lev<4-0>
//    0 0 |    0 |  0 0 0 1 0  = 0x02 for USA/EU
//    0 0 |    0 |  0 0 1 1 1  = 0x07 for JAPAN
myBuf[2] = 0x02;//0x07

st25RU3993ContinuousWrite(ST25RU3993_REG_MODULATORCONTROL1, myBuf, 3);

// CP Control Register 0x12
// LF_R3<7-6> | LF_C3<5-3> | cp<2-0>
//    0 0 | 1 1 0 |  1 0 1  = 0x25
//  30kOhm, 160pF, 1500uA
st25RU3993SingleWrite(ST25RU3993_REG_CPCONTROL, 0x35);

// Enable Interrupt Register Register 1 0x35 中断控制寄存器1
// e_irq_TX | e_irq_RX | e_irq_fifo | e_irq_err | e_irq_header | - | e_irq_AutoAck | e_irq_noresp
//    0 | 1    |    1    |    1    |    1    | 1 |    1    |    1    = 0x7F
st25RU3993SingleWrite(ST25RU3993_REG_IRQMASK1, 0x7F);

// Enable Interrupt Register Register 2 0x36 中断控制寄存器2
// e_irq_ana | e_irq_cmd |  -  | e_irq_err1 | e_irq_err2 | e_irq_err3
//    0    |    0    |0 0 0|    1    |    1    |    1    = 0x07
st25RU3993SingleWrite(ST25RU3993_REG_IRQMASK2, 0x07);

// RX Length Register 1 0x3A
// RX_crc_n2 | fifo_dir_irq2 | rep_irg2 | auto_errcode_RXl | RXl11-RXl8
//    0    |    0    | 0    |       1       | 0 0 0 0  = 0x10
st25RU3993SingleWrite(ST25RU3993_REG_RXLENGTHUP, 0x10);
st25RU3993SetBaseFrequency(925);
st25RU3993SetSensitivity(3);

// Now that the chip is configured with correct ref frequency the PLL
// should lock

st25RU3993SingleRead(ST25RU3993_REG_AGCANDSTATUS,&myBuf[0]);
if(!(myBuf[0] & 0x01))
{
      return 4; // Crystal not stable
}
else
{

}
if(!(myBuf[0] & 0x02))
{
      return 5; // PLL not locked
}
else
{

}

return 0;