TI中文支持网Part Number:TLC3578
u16 TLC3578_Write_Data(u16 data)
{
u16 a;
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
SPI2_CS_HIGH;
delay_ms(1);
SPI2_CS_LOW;
a = SPI2_ReadWriteByte(data);
delay_ms(1);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
SPI2_CS_HIGH;
return a;
}
Amy Luo：
您好，
对于TLC3578，您输入的信号是什么？输入的是变化的信号吗？
CFR寄存器您配置的是什么？
,
yang li：
输入的是电压信号，连接的电位计，CFR配置为AB00
,
Amy Luo：
您好，您的问题解决了吗？
您描述说“返回的采样值不变化”，那么您输入的信号是变化的还是固定电平值？
您输入已知的固定电平信号，采样输出结果是正确的吗？
您是使用的Software Programmed Mode是吗？如果这样的话，上电后主控制器需要先写A000H，然后才能WRITE CFR配置TLC3578
另外，您可以附上您的原理图吗？
下面代码希望对您有帮助：
/****************************************************************/ /* FILENAME: main.c*/ /* DESCRIPTION: This program uses the MSP430F449 to read 500*/ /*samples from the TLC3578 EVM board.*/ /*The samples are display on the LCD Screen of the HPA449.*/ /*Refer to the .map file created by the compiler for the*/ /*address in memory for adc_data*/ /*AUTHOR: T. Hendrick, Data Acquisition Products,*/ /*Dallas Texas*/ /*CREATED 2004(C) BY TEXAS INSTRUMENTS INCORPORATED.*/ /*VERSION: 01*/ /****************************************************************/ #include <msp430x44x.h> #include <math.h> #include "SBLCDA2.h"#define Resonator (0)/***************************************************************/#define Samples 200 #define UD_P1_C(0xD1) #define UD_P2_H(0x76)/**************** Function prototypes ***********************************/ /**/ void init_sys(void);/* MSP430 Initialisation routine*/ void setupClock(int); void init_adc(void);/* adc initialisation routine*/ void delay(int);/* Software delay*/ void TX_complete(void);/* Transmit / Receive ready*/ void RX_complete(void);/* Transmit / Receive ready*/ void adc_convert(int);/* Do the adc conversion*/ void adc_convertCH1(int);/* Do the adc conversion*/ void display(void);/* Indicate Program complete*/ void InitializeLCD( void ); void clearDisplay( void ); void clearMajor( void ); void sortMajor( unsigned int ); void sortFloat( double ); void displaySpecial( long int ); void displayMinor( int, int ); void displayHPA449(void); void displayTest(int, int);/**/ /************************************************************************//************************************************************************/ /**/ /* Global variable declarations*/ /**/ /************************************************************************/intadc_data[Samples];// Storage for converted data intadc_dataCH2[Samples];// Storage for converted data intbyte0, byte1, byte2, byte3, trash;int i, j, min, max, CH = 0; double result, value;/************************************************************************/ /**/ /* Local Functions*/ /**/ /************************************************************************/ double display_volts(int *codes, int ct) {int i;double sum=0, average=0;for (i=0;i<ct;i+=10)sum += ((codes[i]*.001220703125)-10);average = sum/(ct/10);return average; } /************************************************************************/ /**/ /* main() variable declarations*/ /**/ /************************************************************************/#defineADC_FS0x20//p3.5#defineADC_CS0x80//p3.7void main(void) {setupClock(Resonator);init_sys();// Initialise the MSP430init_adc();InitializeLCD();clearDisplay();displaySpecial(SoftBaugh);do {for(i=0; i<Samples; i++){adc_convert(i);// Do conversions from each channeldelay(0);adc_convertCH1(i);// Do conversions from each channel//displayTest(CH, i);}clearMajor();displaySpecial(SoftBaugh|AR);}while (1);// }/************************************************************/ /* Prototype - init_sys*/ /**/ /*Description*/ /*This prototype initialises the MSP430F149*/ /************************************************************/ void init_sys(void) {/* Local function prototype*/ void setupports(void);/* Local function prototype*/ void setupSPI(void);/* Local function prototype*/setupports(); setupSPI();_EINT();// Enable interrupts } /************************************************************/ /* Prototype - setupClock*/ /**/ /*Description*/ /*This prototype sets-up the XT2 oscillator and tests*/ /*that it has settled before moving on*/ /************************************************************/ void setupClock (int RES) {switch (RES){case0:{ WDTCTL = WDTPW + WDTHOLD;/* D=2, N=121, no mod */SCFQCTL=121;// SCFI0 = 0100 0100SCFI0=0x44;// DCOPLUS=1, XTS_FLL=0// XCAPXPF=00FLL_CTL0=0x80;// SMCLK=0, XT2OFF=1, SELMX=00, SELS=0, FLL_DIVX=10// FLL_CTL1= 0010 0010FLL_CTL1=0x22;}break;case1:{ WDTCTL = WDTPW + WDTHOLD;// Stop watchdog timerFLL_CTL0&=XT2OFF;// Switch on the XT2 osc.FLL_CTL1|=SELM_XT2+SELS;// Select XT2 osc. for// Test the osc. flag bitdo {IFG1 &= ~OFIFG;// Clear the OFIFG bit} while (OFIFG&IFG1);//}break;} }/************************************************************/ /* Prototype - setupports*/ /*Description*/ /*This prototype sets-up the GPIO ports as appropriate*/ /************************************************************/ void setupports (void) { // SPI port for ADC P3SEL = BIT3 + BIT2 + BIT1;// Bits 3, 2 & 1 are assigned as SPI specific pins P3DIR = ADC_FS + ADC_CS;// Set the ADC_CS bit as an output P3OUT = ADC_FS + ADC_CS;// De-assert ADC_CS for the adc - HIGH//SetupInterrupts P1IFG |= 0x00; P1IES |= 0x40; P1IE |= 0x40; }/************************************************************/ /* Prototype - setupSPI*/ /**/ /*Description*/ /*This prototype sets-up the P3 for communication via SPI */ /************************************************************/ void setupSPI (void)/************************************************************/ /* System definitions*/ /************************************************************/ #defineSPI0en0x40 #defineSPI1en0x10{ ME1 |= USPIE0;// Module Enable - SPI// U0CTL &= ~SWRST;// Make sure the RESET bit is off U0CTL |= CHAR + SYNC + MM;// USART0 module operation// CHAR = 1 => 8-bit data// SYNC = 1 => SPI selected// MM = 1 => master mode,//MSP is the master U0TCTL |= SSEL0 + SSEL1 + STC;// USART0 Tranmit control register// SSEL0 = 1 & SSEL1 = 1// => SMCLK is used for baud-rate generation// STC = 1 => 3-pin SPI mode selectedU0BR0= 0x02;// Divide SMCLK by 4 => transfer clock U0BR1= 0x00;// U0MCTL = 0x00;// Modulation control - not used. Ensure// all these bits are reset }/************************************************************/ /* Prototype - init_adc*/ /**/ /*Description*/ /*This prototype sets-up the TLV2553 ADC*/ /************************************************************/ void init_adc (void) { P3OUT |= (ADC_FS);// Assert ADC_CS LOW P3OUT &= ~(ADC_CS);// Assert ADC_CS* LOW while ((IFG1 & UTXIFG0) == 0); trash = U0RXBUF; U0TXBUF = 0xA2;// Start SCLK to ADCwhile ((IFG1 & UTXIFG0) == 0); trash = U0RXBUF; U0TXBUF = 0x00;// Start SCLK to ADCwhile ((IFG1 & UTXIFG0) == 0); trash = U0RXBUF; U0TXBUF = 0x00;// Start SCLK to ADwhile ((IFG1 & UTXIFG0) == 0); trash = U0RXBUF; U0TXBUF = 0x00;// Start SCLK to AD delay(10); P3OUT |= (ADC_CS);// De-assert ADC_CS* HIGH }/************************************************************/ /* Prototype - delay*/ /*Description*/ /*This prototype gives a delay of around 1 second*/ /************************************************************/ void delay(int time){unsigned int i;for (i = 0; i < time; i++);}/************************************************************/ /* Prototype - convert*/ /*Description*/ /*This prototype does the adc conversion*/ /************************************************************/ void adc_convert (int cnt) { P3OUT &= ~(ADC_CS);// Assert ADC_CS LOW while ((IFG1 & UTXIFG0) == 0);byte0 = U0RXBUF;// Store this data in the hi-byte variable.U0TXBUF = 0x00; //CH<<4;// Send clocks to the ADC, this shiftswhile ((IFG1 & UTXIFG0) == 0);byte1 = U0RXBUF;// Store this data in the hi-byte variable.U0TXBUF = 0x00;// Send clocks to the ADC, this shiftswhile ((IFG1 & UTXIFG0) == 0);byte2 = U0RXBUF;// Store this data in the hi-byte variable.U0TXBUF = 0x00;// Send clocks to the ADC, this shiftswhile ((IFG1 & UTXIFG0) == 0);byte3 = U0RXBUF;// Store this data in the hi-byte variable.U0TXBUF = 0x00;// Send clocks to the ADC, this shiftsdelay(10);// sampling. //RX_complete(); P3OUT |= (ADC_CS);// De-assert ADC_CS HIGHadc_data[cnt] = ((byte2 << 8 | byte3 )>>2 & 0x3FFF);}void adc_convertCH1 (int cnt) { P3OUT &= ~(ADC_CS);// Assert ADC_CS LOW while ((IFG1 & UTXIFG0) == 0);byte0 = U0RXBUF;// Store this data in the hi-byte variable.U0TXBUF = 0x01; //CH<<4;// Send clocks to the ADC, this shiftswhile ((IFG1 & UTXIFG0) == 0);byte1 = U0RXBUF;// Store this data in the hi-byte variable.U0TXBUF = 0x00;// Send clocks to the ADC, this shiftswhile ((IFG1 & UTXIFG0) == 0);byte2 = U0RXBUF;// Store this data in the hi-byte variable.U0TXBUF = 0x00;// Send clocks to the ADC, this shiftswhile ((IFG1 & UTXIFG0) == 0);byte3 = U0RXBUF;// Store this data in the hi-byte variable.U0TXBUF = 0x00;// Send clocks to the ADC, this shiftsdelay(10);// sampling. //RX_complete(); P3OUT |= (ADC_CS);// De-assert ADC_CS HIGHadc_dataCH2[cnt] = ((byte2 << 8 | byte3 )>>2 & 0x3FFF);} void displayTest(int channel, int cnt) {switch (channel){case0:displayMinor(5,UD_P1_C);displayMinor(4,UD_P2_H);displayMinor(3,UR_ZERO);displayMinor(2,UR_ZERO);sortFloat(display_volts(adc_data,Samples));break;case1:displayMinor(5,UD_P1_C);displayMinor(4,UD_P2_H);displayMinor(3,UR_ZERO);displayMinor(2,UR_ONE);sortMajor(adc_data[cnt]);break;case2:displayMinor(5,UD_P1_C);displayMinor(4,UD_P2_H);displayMinor(3,UR_ZERO);displayMinor(2,UR_TWO);sortFloat(display_volts(adc_data,Samples));break;case3:displayMinor(5,UD_P1_C);displayMinor(4,UD_P2_H);displayMinor(3,UR_ZERO);displayMinor(2,UR_THREE);sortFloat(display_volts(adc_data,Samples));break;case4:displayMinor(5,UD_P1_C);displayMinor(4,UD_P2_H);displayMinor(3,UR_ZERO);displayMinor(2,UR_FOUR);sortMajor(adc_data[cnt]);break;case5:displayMinor(5,UD_P1_C);displayMinor(4,UD_P2_H);displayMinor(3,UR_ZERO);displayMinor(2,UR_FIVE);sortMajor(adc_data[cnt]);break;case6:displayMinor(5,UD_P1_C);displayMinor(4,UD_P2_H);displayMinor(3,UR_ZERO);displayMinor(2,UR_SIX);sortFloat(display_volts(adc_data,Samples));break;case7:displayMinor(5,UD_P1_C);displayMinor(4,UD_P2_H);displayMinor(3,UR_ZERO);displayMinor(2,UR_SEVEN);sortFloat(display_volts(adc_data,Samples));break;}}#pragma vector=PORT1_VECTOR __interrupt void CH_switch (void) {_DINT();clearMajor();P1IFG &= ~BIT6;CH = CH + 1;if (CH >= 8) CH = 0;delay(1000);_EINT(); }
