TI中文支持网用的是430F5529开发板
我用一路通道对外部输入的信号进行采样，寄存器设置如下
P6SEL |= BIT7;// Enable A/D channel A7ADC12CTL0 = ADC12ON+ADC12SHT0_2+ADC12MSC;// Turn on ADC12, set sampling time, set multiple sample conversionADC12CTL1 = ADC12CONSEQ_2+ADC12SHP+ADC12CSTARTADD_7;// Use sampling timer, set mode,Repeat-single-channelADC12MCTL7 = ADC12INCH_7; //channel = A7ADC12IE = BIT7;// Enable ADC12IFG.7ADC12CTL0 |= ADC12ENC;// Enable conversionsADC12CTL0 |= ADC12SC;// Start conversion
ADC12中断中的内容如下：
#pragma vector=ADC12_VECTOR
__interrupt void ADC12ISR (void)
{switch(__even_in_range(ADC12IV,34)){case 0: break;// Vector 0: No interruptcase 2: break;// Vector 2: ADC overflowcase 4: break;// Vector 4: ADC timing overflowcase 6: break; // Vector 6: ADC12IFG0case 8: break;// Vector 8: ADC12IFG1case 10: break;// Vector 10: ADC12IFG2case 12: break;// Vector 12: ADC12IFG3case 14: break;// Vector 14: ADC12IFG4case 16: break;// Vector 16: ADC12IFG5case 18: break;// Vector 18: ADC12IFG6case 20: results[index] = ADC12MEM7;// Move resultsindex++;// Increment results index, modulo; Set Breakpoint1 hereif (index == 408){ADC12IE = 0x00;// Disable ADC12IFG.7flag=1;index = 0;} // Vector 20: ADC12IFG7case 22: break;// Vector 22: ADC12IFG8case 24: break;// Vector 24: ADC12IFG9case 26: break;// Vector 26: ADC12IFG10case 28: break;// Vector 28: ADC12IFG11case 30: break;// Vector 30: ADC12IFG12case 32: break;// Vector 32: ADC12IFG13case 34: break;// Vector 34: ADC12IFG14default: break;}
}
另外我想用TI提供的齿轮电位计的程序来调节，关于齿轮电位计的程序如下：
#include "msp430.h"
#include "HAL_Wheel.h"
#define WHEEL_PORT_DIR P8DIR
#define WHEEL_PORT_OUT P8OUT
#define WHEEL_ENABLE BIT0
#define ADC_PORT_SEL P6SEL
#define ADC_INPUT_A5 BIT5
uint16_t positionData;
uint16_t positionDataOld;
/***************************************************************************//**
* @briefSet up the wheel
* @paramNone
* @return None
******************************************************************************/
void Wheel_init(void)
{WHEEL_PORT_DIR |= WHEEL_ENABLE;WHEEL_PORT_OUT |= WHEEL_ENABLE;// Enable wheelADC12CTL0 = ADC12SHT02 + ADC12ON;// Sampling time, ADC12 onADC12CTL1 = ADC12SHP;// Use sampling timerADC12MCTL0 = ADC12INCH_5;// Use A5 (wheel) as inputADC12CTL0 |= ADC12ENC;// Enable conversionsADC_PORT_SEL |= ADC_INPUT_A5;// P6.5 ADC option select (A5)
}
/***************************************************************************//**
* @briefDetermine the wheel's position
* @paramNone
* @return Wheel position (0~7)
******************************************************************************/
uint8_t Wheel_getPosition(void)
{uint8_t position = 0;Wheel_getValue();//determine which position the wheel is inif (positionData > 0x0806)position = 7 - (positionData - 0x0806) / 260; //scale the data for 8 different positionselseposition = positionData / 260;return position;
}
/***************************************************************************//**
* @briefDetermine the raw voltage value across the potentiometer
* @paramNone
* @return Value
******************************************************************************/
uint16_t Wheel_getValue(void)
{//measure ADC valueADC12IE = 0x01;// Enable interruptADC12CTL0 |= ADC12SC;// Start sampling/conversion__bis_SR_register(LPM0_bits + GIE);// LPM0, ADC12_ISR will force exitADC12IE = 0x00;// Disable interrupt//add hysteresis on wheel to remove fluctuationsif (positionData > positionDataOld)if ((positionData - positionDataOld) > 10)positionDataOld = positionData;//use new data if change is beyond// fluctuation thresholdelsepositionData = positionDataOld;//use old data if change is not beyond// fluctuation thresholdelseif ((positionDataOld - positionData) > 10)positionDataOld = positionData;//use new data if change is beyond// fluctuation thresholdelsepositionData = positionDataOld;//use old data if change is not beyond// fluctuation thresholdreturn positionData;
}
/***************************************************************************//**
* @briefDisable wheel
* @paramNone
* @return none
******************************************************************************/
void Wheel_disable(void)
{WHEEL_PORT_OUT &= ~WHEEL_ENABLE;//disable wheelADC12CTL0 &= ~ADC12ENC;// Disable conversionsADC12CTL0 &= ~ADC12ON;// ADC12 off
}
/***************************************************************************//**
* @briefEnable wheel
* @paramNone
* @return none
******************************************************************************/
void Wheel_enable(void)
{WHEEL_PORT_OUT |= WHEEL_ENABLE;//disable wheelADC12CTL0 |= ADC12ON;// ADC12 onADC12CTL0 |= ADC12ENC;// Enable conversions
}
/***************************************************************************//**
* @brief Handles ADC interrupts.
*
*Stores result of single ADC conversion for reading position of the scroll wheel.
* @param none
* @return none
******************************************************************************/
#pragma vector = ADC12_VECTOR
__interrupt void ADC12_ISR(void)
{switch (__even_in_range(ADC12IV, ADC12IV_ADC12IFG15)){// Vector ADC12IV_NONE: No interruptcase ADC12IV_NONE:break;// Vector ADC12IV_ADC12OVIFG: ADC overflowcase ADC12IV_ADC12OVIFG:break;// Vector ADC12IV_ADC12TOVIFG: ADC timing overflowcase ADC12IV_ADC12TOVIFG:break;// Vector ADC12IV_ADC12IFG0: ADC12IFG0:case ADC12IV_ADC12IFG0:positionData = ADC12MEM0;// ADC12MEM = A0 > 0.5AVcc?__bic_SR_register_on_exit(LPM0_bits);// Exit active CPUbreak;// Vector ADC12IV_ADC12IFG1: ADC12IFG1case ADC12IV_ADC12IFG1:break;// Vector ADC12IV_ADC12IFG2: ADC12IFG2case ADC12IV_ADC12IFG2:break;// Vector ADC12IV_ADC12IFG3: ADC12IFG3case ADC12IV_ADC12IFG3:break;// Vector ADC12IV_ADC12IFG4: ADC12IFG4case ADC12IV_ADC12IFG4:break;// Vector ADC12IV_ADC12IFG5: ADC12IFG5case ADC12IV_ADC12IFG5:break;// Vector ADC12IV_ADC12IFG6: ADC12IFG6case ADC12IV_ADC12IFG6:break;// Vector ADC12IV_ADC12IFG7: ADC12IFG7case ADC12IV_ADC12IFG7:break;// Vector ADC12IV_ADC12IFG8: ADC12IFG8case ADC12IV_ADC12IFG8:break;// Vector ADC12IV_ADC12IFG9: ADC12IFG9case ADC12IV_ADC12IFG9:break;// Vector ADC12IV_ADC12IFG10: ADC12IFG10case ADC12IV_ADC12IFG10:break;// Vector ADC12IV_ADC12IFG11: ADC12IFG11case ADC12IV_ADC12IFG11:break;// Vector ADC12IV_ADC12IFG12: ADC12IFG12case ADC12IV_ADC12IFG12:break;// Vector ADC12IV_ADC12IFG13: ADC12IFG13case ADC12IV_ADC12IFG13:break;// Vector ADC12IV_ADC12IFG14: ADC12IFG14case ADC12IV_ADC12IFG14:break;// Vector ADC12IV_ADC12IFG15: ADC12IFG15case ADC12IV_ADC12IFG15:break;default:break;}
}
我尝试了很多方法，经常就是齿轮电位计采样不了，这两个AD如何才能融合在一起？
kqian0327：
你好，
请问两个不同通道的采样率不一样还是什么情况？
按我的理解，如果你需要采两个通道你可以选择单次触发多次采样不就ok了？
还是你的应用比较特殊？
xinyi chen：
回复 kqian0327:
你好，
采样率不一样，也不同时进行，齿轮电位计不是一直采。
单次触发多次采样怎么设置？
