TI中文支持网请教一下AFE4400血氧模块的AFE_PDNZ管脚是输入口还是输出口，它的作用是什么样的？是不是寄存器配置好以后，期间会自动工作？
Jason Shen：
是输入口，控制芯片进入低功耗模式，AFE-only power-down input; active low. Can be connected to the port pin of an external microcontroller.
配置好后，芯片会自动执行亮灯采样，然后采集数据。
fang chong zhao：
回复 Jason Shen:
我现在电路焊好了，程序也写好了，但是程序烧进去，感觉寄存器没有配置成功，没有任何现象，电路板检查唯一的现象是CLKOUT的输出是正常的4Mhz,不知道问题是什么。
#include <msp430F5528.h>unsigned long LL;unsigned long AFE44xx_Default_Register_Settings[49] = { //Reg0: CONTROL0: CONTROL REGISTER 0 0x00000,//* =======================500Hz================================= // // //Reg1:REDSTARTCOUNT: SAMPLE RED START COUNT// 6000,// //Reg2:REDENDCOUNT: SAMPLE RED END COUNT// 7599,// //Reg3:REDLEDSTARTCOUNT: RED LED START COUNT// 6000,// //Reg4:REDLEDENDCOUNT: RED LED END COUNT// 7599,// //Reg5:AMBREDSTARTCOUNT: SAMPLE AMBIENT RED START COUNT// 0000,// //Reg6:AMBREDENDCOUNT: SAMPLE AMBIENT RED END COUNT// 1599,// //Reg7:IRSTARTCOUNT: SAMPLE IR START COUNT// 2000,// //Reg8:IRENDCOUNT: SAMPLE IR END COUNT// 3599,// //Reg9:IRLEDSTARTCOUNT: IR LED START COUNT// 2000,// //Reg10:IRLEDENDCOUNT: IR LED END COUNT// 3599,// //Reg11:AMBIRSTARTCOUNT: SAMPLE AMBIENT IR START COUNT// 4000,// //Reg12:AMBIRENDCOUNT: SAMPLE AMBIENT IR END COUNT// 5599,// //Reg13:REDCONVSTART: REDCONVST// 2,// //Reg14:REDCONVEND: RED CONVERT END COUNT// 1999,// //Reg15:AMBREDCONVSTART: RED AMBIENT CONVERT START COUNT// 2002,// //Reg16:AMBREDCONVEND: RED AMBIENT CONVERT END COUNT// 3999,// //Reg17:IRCONVSTART: IR CONVERT START COUNT// 4002,// //Reg18:IRCONVEND: IR CONVERT END COUNT// 5999,// //Reg19:AMBIRCONVSTART: IR AMBIENT CONVERT START COUNT// 6002,// //Reg20:AMBIRCONVEND: IR AMBIENT CONVERT END COUNT// 7999,// //Reg21:ADCRESETSTCOUNT0: ADC RESET 0 START COUNT// 0,// //Reg22:ADCRESETENDCOUNT0: ADC RESET 0 END COUNT// 0,// //Reg23:ADCRESETSTCOUNT1: ADC RESET 1 START COUNT// 2000,// //Reg24:ADCRESETENDCOUNT1: ADC RESET 1 END COUNT// 2000,// //Reg25:ADCRESETENDCOUNT2: ADC RESET 2 START COUNT// 4000,// //Reg26:ADCRESETENDCOUNT2: ADC RESET 2 END COUNT// 4000,// //Reg27:ADCRESETENDCOUNT3: ADC RESET 3 START COUNT// 6000,// //Reg28:ADCRESETENDCOUNT3: ADC RESET 3 END COUNT// 6000,// //Reg29:PRPCOUNT: PULSE REPETITION PERIOD COUNT// 7999, /*=======================80Hz======================================*/ //Reg1:REDSTARTCOUNT: SAMPLE RED START COUNT 37500, //Reg2:REDENDCOUNT: SAMPLE RED END COUNT 49999, //Reg3:REDLEDSTARTCOUNT: RED LED START COUNT 37500, //Reg4:REDLEDENDCOUNT: RED LED END COUNT 49999, //Reg5:AMBREDSTARTCOUNT: SAMPLE AMBIENT RED START COUNT 0000, //Reg6:AMBREDENDCOUNT: SAMPLE AMBIENT RED END COUNT 12499, //Reg7:IRSTARTCOUNT: SAMPLE IR START COUNT 12500, //Reg8:IRENDCOUNT: SAMPLE IR END COUNT 24999, //Reg9:IRLEDSTARTCOUNT: IR LED START COUNT 12500, //Reg10:IRLEDENDCOUNT: IR LED END COUNT 24999, //Reg11:AMBIRSTARTCOUNT: SAMPLE AMBIENT IR START COUNT 25000, //Reg12:AMBIRENDCOUNT: SAMPLE AMBIENT IR END COUNT 37499, //Reg13:REDCONVSTART: REDCONVST 2, //Reg14:REDCONVEND: RED CONVERT END COUNT 12499, //Reg15:AMBREDCONVSTART: RED AMBIENT CONVERT START COUNT 12502, //Reg16:AMBREDCONVEND: RED AMBIENT CONVERT END COUNT 24999, //Reg17:IRCONVSTART: IR CONVERT START COUNT 25002, //Reg18:IRCONVEND: IR CONVERT END COUNT 37499, //Reg19:AMBIRCONVSTART: IR AMBIENT CONVERT START COUNT 37502, //Reg20:AMBIRCONVEND: IR AMBIENT CONVERT END COUNT 49999, //Reg21:ADCRESETSTCOUNT0: ADC RESET 0 START COUNT 0, //Reg22:ADCRESETENDCOUNT0: ADC RESET 0 END COUNT 0, //Reg23:ADCRESETSTCOUNT1: ADC RESET 1 START COUNT 12500, //Reg24:ADCRESETENDCOUNT1: ADC RESET 1 END COUNT 12500, //Reg25:ADCRESETENDCOUNT2: ADC RESET 2 START COUNT 25000, //Reg26:ADCRESETENDCOUNT2: ADC RESET 2 END COUNT 25000, //Reg27:ADCRESETENDCOUNT3: ADC RESET 3 START COUNT 37500, //Reg28:ADCRESETENDCOUNT3: ADC RESET 3 END COUNT 37500, //Reg29:PRPCOUNT: PULSE REPETITION PERIOD COUNT 49999, /*=======================62.5Hz======================================*/// //Reg1:REDSTARTCOUNT: SAMPLE RED START COUNT// 0x0BB80,// //Reg2:REDENDCOUNT: SAMPLE RED END COUNT// 0x0F9FE,// //Reg3:REDLEDSTARTCOUNT: RED LED START COUNT// 0x0BB80,// //Reg4:REDLEDENDCOUNT: RED LED END COUNT// 0x0F9FF,// //Reg5:AMBREDSTARTCOUNT: SAMPLE AMBIENT RED START COUNT// 0000,// //Reg6:AMBREDENDCOUNT: SAMPLE AMBIENT RED END COUNT// 0x03E7E,// //Reg7:IRSTARTCOUNT: SAMPLE IR START COUNT// 0x03E80,// //Reg8:IRENDCOUNT: SAMPLE IR END COUNT// 0x07CFE,// //Reg9:IRLEDSTARTCOUNT: IR LED START COUNT// 0x03E80,// //Reg10:IRLEDENDCOUNT: IR LED END COUNT// 0x07CFF,// //Reg11:AMBIRSTARTCOUNT: SAMPLE AMBIENT IR START COUNT// 0x07D00,// //Reg12:AMBIRENDCOUNT: SAMPLE AMBIENT IR END COUNT// 0x0BB7E,// //Reg13:REDCONVSTART: REDCONVST// 0x00002,// //Reg14:REDCONVEND: RED CONVERT END COUNT// 0x03E7F,// //Reg15:AMBREDCONVSTART: RED AMBIENT CONVERT START COUNT// 0x03E82,// //Reg16:AMBREDCONVEND: RED AMBIENT CONVERT END COUNT// 0x07CFF,// //Reg17:IRCONVSTART: IR CONVERT START COUNT// 0x07D02,// //Reg18:IRCONVEND: IR CONVERT END COUNT// 0x0BB7F,// //Reg19:AMBIRCONVSTART: IR AMBIENT CONVERT START COUNT// 0x0BB82,// //Reg20:AMBIRCONVEND: IR AMBIENT CONVERT END COUNT// 0x0F9FF,// //Reg21:ADCRESETSTCOUNT0: ADC RESET 0 START COUNT// 0,// //Reg22:ADCRESETENDCOUNT0: ADC RESET 0 END COUNT// 0,// //Reg23:ADCRESETSTCOUNT1: ADC RESET 1 START COUNT// 0x03E80,// //Reg24:ADCRESETENDCOUNT1: ADC RESET 1 END COUNT// 0x03E80,// //Reg25:ADCRESETENDCOUNT2: ADC RESET 2 START COUNT// 0x07D00,// //Reg26:ADCRESETENDCOUNT2: ADC RESET 2 END COUNT// 0x07D00,// //Reg27:ADCRESETENDCOUNT3: ADC RESET 3 START COUNT// 0x0BB80,// //Reg28:ADCRESETENDCOUNT3: ADC RESET 3 END COUNT// 0x0BB80,// //Reg29:PRPCOUNT: PULSE REPETITION PERIOD COUNT// 0x0F9FF,
//Reg30:CONTROL1: CONTROL REGISTER 1 0x00107, //timer enabled, averages=3, RED and IR LED pulse ON PD_ALM AND LED_ALM pins //Reg31:?: ?? 0x00000, //Reg32:TIAGAIN: TRANS IMPEDANCE AMPLIFIER GAIN SETTING REGISTER 0x00000, //Reg33:TIA_AMB_GAIN: TRANS IMPEDANCE AAMPLIFIER AND AMBIENT CANELLATION STAGE GAIN 0x00000, //Reg34:LEDCNTRL: LED CONTROL REGISTER //0x11414, // 初始电流 Red：3.90625mA, IR:3.90625mA 0x12020, //Reg35:CONTROL2: CONTROL REGISTER 2 //0x00000, //bit 9 0x20300, // external 8MHz clock bit9=1,********************************** //Reg36:?: ?? 0x00000, //Reg37:?: ?? 0x00000, //Reg38:?: ?? 0x00000, //Reg39:?: ?? 0x00000, //Reg40:: ?? 0x00000, //Reg41:ALARM: ?? 0x00000, //Reg42:REDVALUE: RED DIGITAL SAMPLE VALUE 0x00000, //Reg43:AMBREDVALUE: Ambient RED Digital Sample Value 0x00000, //Reg44:IRVALUE: IR Digital Sample Value 0x00000, //Reg45:AMBIRVALUE: Ambient IR Digital Sample Value 0x00000, //Reg46:RED-AMBREDVALUE: RED-AMBIENT RED DIGITAL SAMPLE VALUE 0x00000, //Reg47:IR-AMBIRVALUE: IR-AMBIENT IR DIGITAL SAMPLE VALUE 0x00000, //Reg48:DIGNOSTICS: DIAGNOSTICS FLAGS REGISTER 0x00000 };
//初始化串口void UART(){ P4SEL = BIT4+BIT5; // P3.4,5 = USCI_A0 TXD/RXD UCA1CTL1 |= UCSWRST; // **Put state machine in reset** UCA1CTL1 |= UCSSEL_2; // SMCLK UCA1BR0 = 0x36; // 1MHz 9600 (see User's Guide) UCA1BR1 = 0; // 1MHz 9600 UCA1MCTL = UCBRS_5 + UCBRF_0; // Modln UCBRSx=0, UCBRFx=0, // over sampling UCA1CTL1 &= ~UCSWRST; // **Initialize USCI state machine** UCA1IE &= ~ UCRXIE; // disable USCI_A0 RX interrupt}void delay(){ int i; for(i=0;i<10;i++); }void Set_GPIO(void){ P3DIR |= 0x18; //p3.3(REST),p3.4(PDNZ)定义为输出口 P3OUT |= 0x18; P4DIR |= 0x01; //p4.0(CS)定义为输出口 P2REN |=BIT2; //P2.2产生中断 P2OUT |=BIT2; P2IES |=BIT2; P2IFG &= ~BIT2; P2IE |=BIT2;}void Spi_Initial(){ P4SEL |=BIT1+BIT2+BIT3; //P3.0.1.2设置成SPI通信模式 UCB1CTL1 |=UCSWRST; //软件复位SPI模块 UCB1CTL0 |=UCMST+UCSYNC+UCMSB; // 主机模式，同步模式，高位在前,不活动状态不低电平 UCB1CTL1 |=UCSSEL_2; //时钟选择为SMCLK UCB1BR0 = 0X02; UCB1BR1 = 0X00; //时钟信号分频 UCB1CTL1 &= ~UCSWRST; //完成寄存器的配置 UCB1IE |= UCRXIE+UCTXIE; //使能USCI_B0接收中断 }void AFE44xx_Reg_Write (unsigned char reg_address, unsigned long data){ unsigned char dummy_rx; //Set Control0 – Disable SPI Read bit //Write to register – byte wise transfer, 8-Bit transfers P4OUT&= ~0x01; // SEN LOW FOR TRANSMISSION. // Loop unrolling for machine cycle optimization UCB1TXBUF = 0; // Send the first byte to the TX Buffer: Address of register while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 0; // Send the second byte to the TX Buffer: Data[23:16] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 0; // Send the third byte to the TX Buffer: Data[15:8] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 0; // Send the first byte to the TX Buffer: Data[7:0] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf P4OUT|=0x01; // SEN HIGH
//Write to register – byte wise transfer, 8-Bit transfers P4OUT&= ~0x01; // SEN LOW FOR TRANSMISSION. // Loop unrolling for machine cycle optimization UCB1TXBUF = reg_address; // Send the first byte to the TX Buffer: Address of register while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = (unsigned char)(data >>16); // Send the second byte to the TX Buffer: Data[23:16] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = (unsigned char)(((data & 0x00FFFF) >>8)); // Send the third byte to the TX Buffer: Data[15:8] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = (unsigned char)(((data & 0x0000FF))); // Send the first byte to the TX Buffer: Data[7:0] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf P4OUT|=0x01; // SEN HIGH}void AFE44xx_Default_Reg_Init(void){ unsigned char Reg_Init_i; for ( Reg_Init_i = 0; Reg_Init_i < 49; Reg_Init_i++) { AFE44xx_Reg_Write(Reg_Init_i, AFE44xx_Default_Register_Settings[Reg_Init_i]); }}unsigned long AFE44xx_Reg_Read(unsigned char Reg_address){ unsigned char dummy_rx; unsigned long retVal, SPI_Rx_buf[10]; retVal = 0; //Read register and set bit 0 to 1, to enable read //Set Control0 – Enable SPI Read bit P4OUT&= ~0x01; // SEN LOW FOR TRANSMISSION. // Loop unrolling for machine cycle optimization UCB1TXBUF = 0; // Send the first byte to the TX Buffer: Address of register while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 0; // Send the second byte to the TX Buffer: Data[23:16] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 0; // Send the third byte to the TX Buffer: Data[15:8] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 1; // Send the first byte to the TX Buffer: Data[7:0] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf P4OUT|=0x01; // set HIGH at end of transmission //Read from register – byte wise transfer, 8-Bit transfers P4OUT&= ~0x01; // SEN LOW FOR TRANSMISSION. // Loop unrolling for machine cycle optimization UCB1TXBUF = Reg_address; // Send the first byte to the TX Buffer: Address of register while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? SPI_Rx_buf[0] = UCB1RXBUF; // Read Rx buf UCB1TXBUF = 0; // Send the second byte to the TX Buffer: dummy data while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? SPI_Rx_buf[1] = UCB1RXBUF; // Read Rx buf: Data[23:16] UCB1TXBUF = 0; // Send the third byte to the TX Buffer: dummy data while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? SPI_Rx_buf[2] = UCB1RXBUF; // Read Rx buf: Data[15:8] UCB1TXBUF = 0; // Send the first byte to the TX Buffer: dummy data while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? SPI_Rx_buf[3] = UCB1RXBUF; // Read Rx buf: Data[7:0] P4OUT|=0x01; // set HIGH at end of transmission //Set Control0 – Disable SPI Read bit //Write to register – byte wise transfer, 8-Bit transfers P4OUT&= ~0x01; // SEN LOW FOR TRANSMISSION. // Loop unrolling for machine cycle optimization UCB1TXBUF = 0; // Send the first byte to the TX Buffer: Address of register while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 0; // Send the second byte to the TX Buffer: Data[23:16] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 0; // Send the third byte to the TX Buffer: Data[15:8] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf UCB1TXBUF = 0; // Send the first byte to the TX Buffer: Data[7:0] while ( (UCB1STAT & UCBUSY) ); // USCI_B1 TX buffer ready? dummy_rx = UCB1RXBUF; // Dummy Read Rx buf P4OUT|=0x01; // set HIGH at end of transmission retVal = (SPI_Rx_buf[1]<<16)|(SPI_Rx_buf[2]<<8)|(SPI_Rx_buf[3]); return retVal;}int main( void ){ // Stop watchdog timer to prevent time out reset WDTCTL = WDTPW + WDTHOLD; Set_GPIO(); UART(); Spi_Initial(); // _BIS_SR(GIE); //进入LPM3模式/ 开中断允许 P2IFG &= ~BIT2; // P2.2 IFG cleared P2IE |= BIT2; // P2.2 interrupt enabled AFE44xx_Default_Reg_Init(); while(1) { LL=AFE44xx_Reg_Read(46); }}
这是我的程序
Dongdong Gu：
回复 fang chong zhao:
TI的员工基本很少回答问题，一般问题就这么不了了之，无语的售后
user4725900：
hey fang：
请问下您这边后面是怎么处理的，我这边hardware没有把PDNZ引出来，也就是悬浮的，我怎么对寄存器操作都没反应。
我的source code在ti demo board测试过，如果拉高PDNZ是可以控制的，所以我觉得我的软件没问题，
可否告知您的处理方式，感谢~
