调试通过的TMS320F2812_AD转换程序

1、TMS320F2812 AD转换程序(已调试通过)/* =File name: F28XADC04U.C Originator: Digital Control Systems Group Texas InstrumentsDescription: This file contains source for the F28X general purpose 4 conversions ADC driver for unipolar signalsJoyshang=History:-27-02-2012 Release Rev 1.0 -*/#include IQmathLib.h#includ

2、e DSP28_Device.h#include f28xadc04u.h#include f28xbmsk.h#define CPU_CLOCK_SPEED 6.6667L / for a 150MHz CPU clock speed#define ADC_usDELAY 5000L#define DELAY_US(A) DSP28x_usDelay(long double) A * 1000.0L) / (long double)CPU_CLOCK_SPEED) - 9.0L) / 5.0L)extern void DSP28x_usDelay(unsigned long Count);v

3、oid F28X_adc04u_drv_init(ADCVALS *p) DELAY_US(ADC_usDELAY); AdcRegs.ADCTRL1.all = ADC_RESET_FLAG; /* Reset the ADC Module */ asm( NOP ); asm( NOP ); AdcRegs.ADCTRL3.bit.ADCBGRFDN = 0x3; /* Power up bandgap/reference circuitry */ DELAY_US(ADC_usDELAY); /* Delay before powering up rest of ADC */ AdcRe

4、gs.ADCTRL3.bit.ADCPWDN = 1; /* Power up rest of ADC */ AdcRegs.ADCTRL3.bit.ADCCLKPS = 6; /ADCCLK=HSPCLK/(ADCCTRL17+1)/* Set up ADCTRL3 register */ DELAY_US(ADC_usDELAY); AdcRegs.ADCTRL1.all = 0x0110; /* Set up ADCTRL1 register 0x0110 级联模式 */ AdcRegs.ADCTRL2.all = 0x0100; /* Set up ADCTRL2 register 0

5、x0100 EVA启动转换 */ AdcRegs.ADCMAXCONV.bit.MAX_CONV = 3; /* Specify four conversions */ AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; /IU AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x4; /地 AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 0x8; /IV AdcRegs.ADCCHSELSEQ1.bit.CONV03 = 0xC; /VREF1.5V EvaRegs.EXTCON.bit.EVSOCE = 1; /Enable

6、 SOC EvaRegs.GPTCONA.bit.T1TOADC = 1; /* Set up EV Trigger with Timer1 UF */ unsigned int tempz1; _iq tempz2; _iq tempz3; _iq tempz4; _iq tempz5;void F28X_adc04u_drv_read(ADCVALS *p) /int offset; /long tmp; /* Wait until ADC conversion is completed */ while (AdcRegs.ADCST.bit.SEQ1_BSY = 1) ; /offset

7、 = (int)(p-c1_out - 32767); tempz3 = AdcRegs.ADCRESULT0-AdcRegs.ADCRESULT1; /IU-地 tempz4 = AdcRegs.ADCRESULT3-AdcRegs.ADCRESULT1; /VREF1.5V-地 tempz5 = AdcRegs.ADCRESULT3-tempz4; /IU-tempz4 tempz2 = (AdcRegs.ADCRESULT1 + 0x8000);/*Ibase=4,IQ14*/ tempz2 = _IQmpy(_IQ(20),tempz2); tempz1 = (int)(tempz2

8、& 0x8000)15); if (tempz1=1) p-c1_out = (long)( tempz2 + 0xFFFF0000); p-c1_out = _IQmpy(_IQ(32),p-c1_out); else p-c1_out = (long)( tempz2 + 0x); p-c1_out = _IQmpy(_IQ(32),p-c1_out);/IQ20 / tempz3 = AdcRegs.ADCRESULT0; /temp3 = _IQmpy(temp2,_IQ(10);/* IQ15 */ /tempz3 = (long)(AdcRegs.ADCRESULT1 - 0x56

9、52 + 0x8022)10; /dat_q15 = (1)&0x7FFF; /* Convert result to Q15 (unipolar signal) */ /tmp = (long)p-c1_gain*(long)dat_q15;/ p-c1_out =AdcRegs.ADCRESULT0 - offset; /(int)(tmp13); /dat_q15 = (AdcRegs.ADCRESULT11)&0x7FFF; /* Convert result to Q15 (unipolar signal) */ / tmp = (long)p-c2_gain*(long)dat_q

10、15; / p-c2_out = AdcRegs.ADCRESULT1 - offset; /dat_q15 = (AdcRegs.ADCRESULT21)&0x7FFF; /* Convert result to Q15 (unipolar signal) */ /tmp = (long)p-c3_gain*(long)dat_q15;/ p-c3_out = AdcRegs.ADCRESULT2; AdcRegs.ADCTRL2.all |= 0x4040; /* reset the seq */TMS320F2812的ADC模块用于采样过程的初始化代码void InitAdc(void)

11、 /初始化ADC模块unsigned int i;AdcRegs.ADCTRL1.bit.RESET = 1; /ADC模块软复位,3个周期后,该位自动清0for(i=0;iAdcRegs.ADCTRL1.bit.SUSMOD = 3; /仿真挂起模式，0为忽略仿真挂起AdcRegs.ADCTRL1.bit.ACQ_PS = 1; /采样保持脉冲个数，即SH为1+1=2个ADCCLKAdcRegs.ADCTRL1.bit.CPS = 0; /是否再对送给ADC的时钟进行二分频AdcRegs.ADCTRL1.bit.CONT_RUN = 0; /1:进入连续运行; 0:开始停止模式AdcRegs

12、.ADCTRL1.bit.SEQ_CASC = 0; /0:独立模式; 1:级联序列器模式AdcRegs.ADCTRL3.bit.ADCBGRFDN = 3; /带隙参考电路上电for(i=0;iAdcRegs.ADCTRL3.bit.ADCPWDN = 1; /除带隙参考电路外的其他ADC模块上电for(i=0;iAdcRegs.ADCTRL3.bit.ADCCLKPS = 3; /设置ADC的转换时钟ADCCLK = HSPCLK/(2*(ADCCLKPS+CPS)=25MHZAdcRegs.ADCTRL3.bit.SMODE_SEL = 0; /0：顺序采用模式，1：同步采样模式AdcR

13、egs.MAX_CONV.all = 0x0000; /设置ADC的转换通道数AdcRegs.CHSELSEQ1.bit.CONV00 = 0; /设置ADCINA0为SEQ1的第一个转换通道AdcRegs.ADC_ST_FLAG.bit.INT_SEQ1_CLR=1; /清除SEQ1中断标志AdcRegs.ADCTRL2.bit.EVA_SOC_SEQ1 = 1; /使能EVASOC启动SEQ1AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1; /使能SEQ1中断AdcRegs.ADCTRL2.bit.EVB_SOC_SEQ = 0;AdcRegs.ADCTRL2.b

14、it.RST_SEQ1 = 0;AdcRegs.ADCTRL2.bit.INT_MOD_SEQ1 = 0;AdcRegs.ADCTRL2.bit.EXT_SOC_SEQ1 = 0;AdcRegs.ADCTRL2.bit.RST_SEQ2=0;AdcRegs.ADCTRL2.bit.SOC_SEQ2=0;AdcRegs.ADCTRL2.bit.INT_ENA_SEQ2=0;AdcRegs.ADCTRL2.bit.INT_MOD_SEQ2=0;AdcRegs.ADCTRL2.bit.EVB_SOC_SEQ2=0;AdcRegs.ADCTRL2.bit.SOC_SEQ1 = 0; /为1时，软件启动

15、ADC转换void InitEv(void)EvaRegs.T1CMPR = 0x0000;EvaRegs.T1PR = 75; /2MHZ的采样频率EvaRegs.GPTCONA.bit.T1TOADC = 2; /使能事情管理器A，周期中断启动ADCEvaRegs.T1CON.all = 0x1042; interrupt void ADInterrupt(void)IFR = 0x0000;/-ADTempADTempIndex = (unsigned char)(AdcRegs.RESULT0)8);ADTempIndex = (ADTempIndex+1)&0x01;Value =

16、ADTemp0 + ADTemp1;if(+aa )aa = 0;LED3 = LED3;/- AdcRegs.ADC_ST_FLAG.bit.INT_SEQ1_CLR = 1; /清除INT_SEQ1中断标志AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1; /复位SEQ1序列PieCtrl.PIEACK.all = 0xFFFF; /允许再次响应中断void main(void)InitSysCtrl(); /初始化系统DINT; /屏蔽全局中断IER = 0x0000; /禁止所有中断IFR = 0x0000; /清除所有中断标志InitPieCtrl(); /初始化PIE中断InitPieVectTable(); /初始化PIE中断矢量表InitGpio(); /初始化通用IO口InitSci(); /初始化SCIA寄存器,即初始化串口EALLOW; /允许操作寄