TI中文支持网我在使用ICETEK-F28335-A实验板，以及SEED-XD560PLUS仿真器，在CCS4.2.0027 (UNLICENSED)中成功进入DEBUG，调试TI官方的例程
FILE: Example_2823xAdcSeqModeTest.c // // TITLE: DSP2823x ADC Seq Mode Test.
编译不报错无警告，但是无法完成AD转换，连随机电平都读不到，我怀疑是AD整体不工作，观察AdcRegs.ADCTRL2.bit.SOC_SEQ1及AdcRegs.ADCRESULT0，其中AdcRegs.ADCTRL2.bit.SOC_SEQ1一直为1，而AdcRegs.ADCRESULT0一直为0
上程序
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
// ADC start parameters #if (CPU_FRQ_150MHZ) // Default – 150 MHz SYSCLKOUT #define ADC_MODCLK 0x3 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 150/(2*3) = 25.0 MHz #endif #if (CPU_FRQ_100MHZ) #define ADC_MODCLK 0x2 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 100/(2*2) = 25.0 MHz #endif #define ADC_CKPS 0x1 // ADC module clock = HSPCLK/2*ADC_CKPS = 25.0MHz/(1*2) = 12.5MHz #define ADC_SHCLK 0xf // S/H width in ADC module periods = 16 ADC clocks #define AVG 1000 // Average sample limit #define ZOFFSET 0x00 // Average Zero offset #define BUF_SIZE 2048 // Sample buffer size
// Global variable for this example Uint16 SampleTable[BUF_SIZE];
main() { Uint16 i;
// Step 1. Initialize System Control: // PLL, WatchDog, enable Peripheral Clocks // This example function is found in the DSP2833x_SysCtrl.c file. InitSysCtrl();
// Specific clock setting for this example: EALLOW; SysCtrlRegs.HISPCP.all = ADC_MODCLK; // HSPCLK = SYSCLKOUT/ADC_MODCLK EDIS;
// Step 2. Initialize GPIO: // This example function is found in the DSP2833x_Gpio.c file and // illustrates how to set the GPIO to it's default state. // InitGpio(); // Skipped for this example
// Step 3. Clear all interrupts and initialize PIE vector table: // Disable CPU interrupts DINT;
// Initialize the PIE control registers to their default state. // The default state is all PIE interrupts disabled and flags // are cleared. // This function is found in the DSP2833x_PieCtrl.c file. InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags: IER = 0x0000; IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt // Service Routines (ISR). // This will populate the entire table, even if the interrupt // is not used in this example. This is useful for debug purposes. // The shell ISR routines are found in DSP2833x_DefaultIsr.c. // This function is found in DSP2833x_PieVect.c. InitPieVectTable();
// Step 4. Initialize all the Device Peripherals: // This function is found in DSP2833x_InitPeripherals.c // InitPeripherals(); // Not required for this example InitAdc(); // For this example, init the ADC
// Specific ADC setup for this example: AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK; AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS; AdcRegs.ADCTRL1.bit.SEQ_CASC = 1; // 1 Cascaded mode AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; //选择A2 AdcRegs.ADCTRL1.bit.CONT_RUN = 1; // Setup continuous run
// Step 5. User specific code, enable interrupts:
// Clear SampleTable for (i=0; i<BUF_SIZE; i++) { SampleTable[i] = 0; }
// Start SEQ1 AdcRegs.ADCTRL2.all = 0x2000;
// Take ADC data and log the in SampleTable array for(;;) { for (i=0; i<AVG; i++) { while (AdcRegs.ADCST.bit.INT_SEQ1== 0) {} // Wait for interrupt AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1; // Reset SEQ1 SampleTable[i] =((AdcRegs.ADCRESULT0>>4) ); } } }
//=========================================================================== // No more. //===========================================================================
感觉程序问题不大，纠结了一个多星期不知道问题出在哪儿，求帮助~~~~~~~~~~~~~要毕不了业了！！！！QQ 342811994
haotian Yang：
我觉得可能是跟ADCLO可能没有接地有关，在ICETEK-F28335-A实验板的原理图涉及到ADCLO/ADCREFIN的跳线J3 J4如何使用
求大神HITer~~~~~~~~~~~~~要毕不了业了！！！！QQ 342811994
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我在使用ICETEK-F28335-A实验板，以及SEED-XD560PLUS仿真器，在CCS4.2.0027 (UNLICENSED)中成功进入DEBUG，调试TI官方的例程
FILE: Example_2823xAdcSeqModeTest.c // // TITLE: DSP2823x ADC Seq Mode Test.
编译不报错无警告，但是无法完成AD转换，连随机电平都读不到，我怀疑是AD整体不工作，观察AdcRegs.ADCTRL2.bit.SOC_SEQ1及AdcRegs.ADCRESULT0，其中AdcRegs.ADCTRL2.bit.SOC_SEQ1一直为1，而AdcRegs.ADCRESULT0一直为0
上程序
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
// ADC start parameters #if (CPU_FRQ_150MHZ) // Default – 150 MHz SYSCLKOUT #define ADC_MODCLK 0x3 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 150/(2*3) = 25.0 MHz #endif #if (CPU_FRQ_100MHZ) #define ADC_MODCLK 0x2 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 100/(2*2) = 25.0 MHz #endif #define ADC_CKPS 0x1 // ADC module clock = HSPCLK/2*ADC_CKPS = 25.0MHz/(1*2) = 12.5MHz #define ADC_SHCLK 0xf // S/H width in ADC module periods = 16 ADC clocks #define AVG 1000 // Average sample limit #define ZOFFSET 0x00 // Average Zero offset #define BUF_SIZE 2048 // Sample buffer size
// Global variable for this example Uint16 SampleTable[BUF_SIZE];
main() { Uint16 i;
// Step 1. Initialize System Control: // PLL, WatchDog, enable Peripheral Clocks // This example function is found in the DSP2833x_SysCtrl.c file. InitSysCtrl();
// Specific clock setting for this example: EALLOW; SysCtrlRegs.HISPCP.all = ADC_MODCLK; // HSPCLK = SYSCLKOUT/ADC_MODCLK EDIS;
// Step 2. Initialize GPIO: // This example function is found in the DSP2833x_Gpio.c file and // illustrates how to set the GPIO to it's default state. // InitGpio(); // Skipped for this example
// Step 3. Clear all interrupts and initialize PIE vector table: // Disable CPU interrupts DINT;
// Initialize the PIE control registers to their default state. // The default state is all PIE interrupts disabled and flags // are cleared. // This function is found in the DSP2833x_PieCtrl.c file. InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags: IER = 0x0000; IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt // Service Routines (ISR). // This will populate the entire table, even if the interrupt // is not used in this example. This is useful for debug purposes. // The shell ISR routines are found in DSP2833x_DefaultIsr.c. // This function is found in DSP2833x_PieVect.c. InitPieVectTable();
// Step 4. Initialize all the Device Peripherals: // This function is found in DSP2833x_InitPeripherals.c // InitPeripherals(); // Not required for this example InitAdc(); // For this example, init the ADC
// Specific ADC setup for this example: AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK; AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS; AdcRegs.ADCTRL1.bit.SEQ_CASC = 1; // 1 Cascaded mode AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; //选择A2 AdcRegs.ADCTRL1.bit.CONT_RUN = 1; // Setup continuous run
// Step 5. User specific code, enable interrupts:
// Clear SampleTable for (i=0; i<BUF_SIZE; i++) { SampleTable[i] = 0; }
// Start SEQ1 AdcRegs.ADCTRL2.all = 0x2000;
// Take ADC data and log the in SampleTable array for(;;) { for (i=0; i<AVG; i++) { while (AdcRegs.ADCST.bit.INT_SEQ1== 0) {} // Wait for interrupt AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1; // Reset SEQ1 SampleTable[i] =((AdcRegs.ADCRESULT0>>4) ); } } }
//=========================================================================== // No more. //===========================================================================
感觉程序问题不大，纠结了一个多星期不知道问题出在哪儿，求帮助~~~~~~~~~~~~~要毕不了业了！！！！QQ 342811994
Tony Chopper：
回复 haotian Yang:
我用函数发生器产生了一路50mV到2V的正弦电压，一根线接到ADCINA3，另一根接到ADCLO，每次采集到的数据要么是2.999，要么是负值，而ADCRESULT寄存器中的值，经常会达到4095，毕不了业了，求助啊
我在使用ICETEK-F28335-A实验板，以及SEED-XD560PLUS仿真器，在CCS4.2.0027 (UNLICENSED)中成功进入DEBUG，调试TI官方的例程
FILE: Example_2823xAdcSeqModeTest.c // // TITLE: DSP2823x ADC Seq Mode Test.
编译不报错无警告，但是无法完成AD转换，连随机电平都读不到，我怀疑是AD整体不工作，观察AdcRegs.ADCTRL2.bit.SOC_SEQ1及AdcRegs.ADCRESULT0，其中AdcRegs.ADCTRL2.bit.SOC_SEQ1一直为1，而AdcRegs.ADCRESULT0一直为0
上程序
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
// ADC start parameters #if (CPU_FRQ_150MHZ) // Default – 150 MHz SYSCLKOUT #define ADC_MODCLK 0x3 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 150/(2*3) = 25.0 MHz #endif #if (CPU_FRQ_100MHZ) #define ADC_MODCLK 0x2 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 100/(2*2) = 25.0 MHz #endif #define ADC_CKPS 0x1 // ADC module clock = HSPCLK/2*ADC_CKPS = 25.0MHz/(1*2) = 12.5MHz #define ADC_SHCLK 0xf // S/H width in ADC module periods = 16 ADC clocks #define AVG 1000 // Average sample limit #define ZOFFSET 0x00 // Average Zero offset #define BUF_SIZE 2048 // Sample buffer size
// Global variable for this example Uint16 SampleTable[BUF_SIZE];
main() { Uint16 i;
// Step 1. Initialize System Control: // PLL, WatchDog, enable Peripheral Clocks // This example function is found in the DSP2833x_SysCtrl.c file. InitSysCtrl();
// Specific clock setting for this example: EALLOW; SysCtrlRegs.HISPCP.all = ADC_MODCLK; // HSPCLK = SYSCLKOUT/ADC_MODCLK EDIS;
// Step 2. Initialize GPIO: // This example function is found in the DSP2833x_Gpio.c file and // illustrates how to set the GPIO to it's default state. // InitGpio(); // Skipped for this example
// Step 3. Clear all interrupts and initialize PIE vector table: // Disable CPU interrupts DINT;
// Initialize the PIE control registers to their default state. // The default state is all PIE interrupts disabled and flags // are cleared. // This function is found in the DSP2833x_PieCtrl.c file. InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags: IER = 0x0000; IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt // Service Routines (ISR). // This will populate the entire table, even if the interrupt // is not used in this example. This is useful for debug purposes. // The shell ISR routines are found in DSP2833x_DefaultIsr.c. // This function is found in DSP2833x_PieVect.c. InitPieVectTable();
// Step 4. Initialize all the Device Peripherals: // This function is found in DSP2833x_InitPeripherals.c // InitPeripherals(); // Not required for this example InitAdc(); // For this example, init the ADC
// Specific ADC setup for this example: AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK; AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS; AdcRegs.ADCTRL1.bit.SEQ_CASC = 1; // 1 Cascaded mode AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; //选择A2 AdcRegs.ADCTRL1.bit.CONT_RUN = 1; // Setup continuous run
// Step 5. User specific code, enable interrupts:
// Clear SampleTable for (i=0; i<BUF_SIZE; i++) { SampleTable[i] = 0; }
// Start SEQ1 AdcRegs.ADCTRL2.all = 0x2000;
// Take ADC data and log the in SampleTable array for(;;) { for (i=0; i<AVG; i++) { while (AdcRegs.ADCST.bit.INT_SEQ1== 0) {} // Wait for interrupt AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1; // Reset SEQ1 SampleTable[i] =((AdcRegs.ADCRESULT0>>4) ); } } }
//=========================================================================== // No more. //===========================================================================
感觉程序问题不大，纠结了一个多星期不知道问题出在哪儿，求帮助~~~~~~~~~~~~~要毕不了业了！！！！QQ 342811994
haotian Yang：
回复 Tony Chopper:
ADCLO是一个参考电位,一般是接地为0电位，你这个是接到函数发生器的地了么？还是用跳线接到别的地方去了？是开发板还是自己做的板子？
