emailcausey 0 Posted July 11, 2014 The code below is working well. I have added an array to it (see purple bold text) and get expected values (arraypres[0]=100....array[9]=109). However, when I change it to uint16_t arraypres[20]; and if(number <20){ arraypres[number]=100+number; number = number+1; } I have unexpected results (see attachment). I am perplexed as to why this is happening. Any suggestions greatly appreciated. Code: #include "DSP28x_Project.h" // Device Header file and Examples Include File #include "f2802x_common/include/adc.h" #include "f2802x_common/include/clk.h" #include "f2802x_common/include/flash.h" #include "f2802x_common/include/gpio.h" #include "f2802x_common/include/pie.h" #include "f2802x_common/include/pll.h" #include "f2802x_common/include/pwm.h" #include "f2802x_common/include/wdog.h" #include "f2802x_common/include/spi.h" #include "f2802x_common/include/timer.h" // nokia5110 libraries #include "font8x8.h" #include "nokia5110.h" #include "stdio.h" // Prototype statements for functions found within this file. interrupt void adc_isr(void); void Adc_Config(void); interrupt void cpu_timer0_isr(void); interrupt void spiRxFifoIsr(void); void gpio_init(void); void spi_init(void); // Global variables used in this example: uint16_t interruptCount=0, val=0, arraymot[5], check=0; uint16_t j=0,i=0, a=0,AVG_VOLT=0,mV=0,ConversionCount = 0, LoopCount = 0,interval=900, y=0; //default interval is 15 min int16 level1=0, level2=0, level3=0, slope=16;//0.16 is the avg slope for LMV324 (should be 0.15 for INA333 slope) uint16_t baseline; uint16_t arraypres[10]; int16 number=0; long Voltage1[10]; long Voltage2[10]; long Voltage3[10]; long Voltage5[10]; long Voltage6[10]; long Voltage7[10]; long Voltage8[10]; long Voltage9[10]; long Voltage10[10]; long Mean_Volt3=0; long Mean_Volt7=0; long Mean_Volt10=0; long Peqn=0; long Peqn1=0; long Peqn2=0; long Sum_Volt3=0; long Sum_Volt7=0; long Sum_Volt10=0; ADC_Handle myAdc; CLK_Handle myClk; FLASH_Handle myFlash; GPIO_Handle myGpio; PIE_Handle myPie; SPI_Handle mySpi; CPU_Handle myCpu; PLL_Handle myPll; PWM_Handle myPwm1; WDOG_Handle myWDog; TIMER_Handle myTimer; char value0[10]; char value1[10]; char value2[10]; void main(void) { // Initialize all the handles needed for this application myAdc = ADC_init((void *)ADC_BASE_ADDR, sizeof(ADC_Obj)); myClk = CLK_init((void *)CLK_BASE_ADDR, sizeof(CLK_Obj)); myCpu = CPU_init((void *)NULL, sizeof(CPU_Obj)); myFlash = FLASH_init((void *)FLASH_BASE_ADDR, sizeof(FLASH_Obj)); myGpio = GPIO_init((void *)GPIO_BASE_ADDR, sizeof(GPIO_Obj)); myPie = PIE_init((void *)PIE_BASE_ADDR, sizeof(PIE_Obj)); myPll = PLL_init((void *)PLL_BASE_ADDR, sizeof(PLL_Obj)); myPwm1 = PWM_init((void *)PWM_ePWM1_BASE_ADDR, sizeof(PWM_Obj)); myWDog = WDOG_init((void *)WDOG_BASE_ADDR, sizeof(WDOG_Obj)); myTimer = TIMER_init((void *)TIMER0_BASE_ADDR, sizeof(TIMER_Obj)); mySpi = SPI_init((void *)SPIA_BASE_ADDR, sizeof(SPI_Obj)); // Perform basic system initialization WDOG_disable(myWDog); CLK_enableAdcClock(myClk); (*Device_cal)(); //Select the internal oscillator 1 as the clock source CLK_setOscSrc(myClk, CLK_OscSrc_Internal); // Setup the PLL for x12 /2 which will yield 60Mhz = 10Mhz * 12 / 2 PLL_setup(myPll, PLL_Multiplier_12, PLL_DivideSelect_ClkIn_by_2); PIE_disable(myPie); PIE_disableAllInts(myPie); CPU_disableGlobalInts(myCpu); CPU_clearIntFlags(myCpu); // If running from flash copy RAM only functions to RAM #ifdef _FLASH memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize); #endif // Setup a debug vector table and enable the PIE PIE_setDebugIntVectorTable(myPie); PIE_enable(myPie); // Register interrupt handlers in the PIE vector table PIE_registerPieIntHandler(myPie, PIE_GroupNumber_10, PIE_SubGroupNumber_1, (intVec_t)&adc_isr); PIE_registerPieIntHandler(myPie, PIE_GroupNumber_1, PIE_SubGroupNumber_7, (intVec_t)&cpu_timer0_isr); // Configure CPU-Timer 0 to interrupt every second: // 60MHz CPU Freq, 1 second Period (in uSeconds) //ConfigCpuTimer(&CpuTimer0, 60, 1000000); TIMER_stop(myTimer); TIMER_setPeriod(myTimer, 60*1000000); TIMER_setPreScaler(myTimer, 0); TIMER_reload(myTimer); TIMER_setEmulationMode(myTimer, TIMER_EmulationMode_StopAfterNextDecrement); TIMER_enableInt(myTimer); TIMER_start(myTimer); // Initialize the ADC ADC_enableBandGap(myAdc); ADC_enableRefBuffers(myAdc); ADC_powerUp(myAdc); ADC_enable(myAdc); ADC_setVoltRefSrc(myAdc, ADC_VoltageRefSrc_Int); // Enable ADCINT1 in PIE PIE_enableAdcInt(myPie, ADC_IntNumber_1); // Enable CPU Interrupt 1 CPU_enableInt(myCpu, CPU_IntNumber_10); // Enable CPU INT1 which is connected to CPU-Timer 0: CPU_enableInt(myCpu, CPU_IntNumber_1); // Enable Global interrupt INTM // Enable TINT0 in the PIE: Group 1 interrupt 7 PIE_enableTimer0Int(myPie); CPU_enableGlobalInts(myCpu); // Enable Global realtime interrupt DBGM CPU_enableDebugInt(myCpu); // Configure ADC //Note: Channel ADCINA4 will be double sampled to workaround the ADC 1st sample issue for rev0 silicon errata ADC_setIntPulseGenMode(myAdc, ADC_IntPulseGenMode_Prior); //ADCINT1 trips after AdcResults latch ADC_enableInt(myAdc, ADC_IntNumber_1); //Enabled ADCINT1 ADC_setIntMode(myAdc, ADC_IntNumber_1, ADC_IntMode_ClearFlag); //Disable ADCINT1 Continuous mode ADC_setIntSrc(myAdc, ADC_IntNumber_1, ADC_IntSrc_EOC2); //setup EOC2 to trigger ADCINT1 to fire ADC_setSocChanNumber (myAdc, ADC_SocNumber_0, ADC_SocChanNumber_A4); //set SOC0 channel select to ADCINA4 - Interval ADC_setSocChanNumber (myAdc, ADC_SocNumber_1, ADC_SocChanNumber_A4); //set SOC1 channel select to ADCINA4 - Interval ADC_setSocChanNumber (myAdc, ADC_SocNumber_2, ADC_SocChanNumber_A7); //set SOC2 channel select to ADCINA7 - Pressure ADC_setSocChanNumber (myAdc, ADC_SocNumber_3, ADC_SocChanNumber_A3); //Motor ADC_setSocTrigSrc(myAdc, ADC_SocNumber_0, ADC_SocTrigSrc_EPWM1_ADCSOCA); //set SOC0 start trigger on EPWM1A, due to round-robin SOC0 converts first then SOC1 ADC_setSocTrigSrc(myAdc, ADC_SocNumber_1, ADC_SocTrigSrc_EPWM1_ADCSOCA); //set SOC1 start trigger on EPWM1A, due to round-robin SOC0 converts first then SOC1 ADC_setSocTrigSrc(myAdc, ADC_SocNumber_2, ADC_SocTrigSrc_EPWM1_ADCSOCA); //set SOC2 start trigger on EPWM1A, due to round-robin SOC0 converts first then SOC1, then SOC2 ADC_setSocTrigSrc(myAdc, ADC_SocNumber_3, ADC_SocTrigSrc_EPWM1_ADCSOCA); ADC_setSocSampleWindow(myAdc, ADC_SocNumber_0, ADC_SocSampleWindow_64_cycles); //set SOC0 S/H Window to 64 ADC Clock Cycles, (6 ACQPS plus 1) ADC_setSocSampleWindow(myAdc, ADC_SocNumber_1, ADC_SocSampleWindow_64_cycles); //set SOC1 S/H Window to 64 ADC Clock Cycles, (6 ACQPS plus 1) ADC_setSocSampleWindow(myAdc, ADC_SocNumber_2, ADC_SocSampleWindow_64_cycles); //set SOC2 S/H Window to 64 ADC Clock Cycles, (6 ACQPS plus 1) ADC_setSocSampleWindow(myAdc, ADC_SocNumber_3, ADC_SocSampleWindow_64_cycles); // Enable PWM clock CLK_enablePwmClock(myClk, PWM_Number_1); // Setup PWM PWM_enableSocAPulse(myPwm1); // Enable SOC on A group PWM_setSocAPulseSrc(myPwm1, PWM_SocPulseSrc_CounterEqualCmpAIncr); // Select SOC from from CPMA on upcount PWM_setSocAPeriod(myPwm1, PWM_SocPeriod_FirstEvent); // Generate pulse on 1st event PWM_setCmpA(myPwm1, 0x0080); // Set compare A value PWM_setPeriod(myPwm1, 0xFFFF); // Set period for ePWM1 PWM_setCounterMode(myPwm1, PWM_CounterMode_Up); // count up and start CLK_enableTbClockSync(myClk); gpio_init(); spi_init(); nokiaInit(); clear(); myGpio = GPIO_init((void *)GPIO_BASE_ADDR, sizeof(GPIO_Obj)); GPIO_setMode(myGpio, timeandreset, GPIO_19_Mode_GeneralPurpose); GPIO_setDirection(myGpio, timeandreset, GPIO_Direction_Output); GPIO_setHigh(myGpio, timeandreset); //Default is that the Omron is off GPIO_setMode(myGpio, LED1, GPIO_28_Mode_GeneralPurpose); GPIO_setDirection(myGpio, LED1, GPIO_Direction_Output); GPIO_setMode(myGpio, LED2, GPIO_29_Mode_GeneralPurpose); GPIO_setDirection(myGpio, LED2, GPIO_Direction_Output); GPIO_setMode(myGpio, LED3, GPIO_34_Mode_GeneralPurpose); GPIO_setDirection(myGpio, GPIO_Number_34, GPIO_Direction_Output); GPIO_setMode(myGpio, buzzer, GPIO_0_Mode_GeneralPurpose); GPIO_setDirection(myGpio, GPIO_Number_0, GPIO_Direction_Output); GPIO_setLow(myGpio, LED1); GPIO_setLow(myGpio, LED2); GPIO_setLow(myGpio, LED3); GPIO_setLow(myGpio, buzzer); int SBP; SBP = 120; int DBP; DBP = 110; while(1) { //arraypres[val] = 1; asm(" NOP"); val = interruptCount; //baseline pressure taken during first 5 seconds if (val==5){ //0 V pulse sent for 3 seconds GPIO_setLow(myGpio, timeandreset); } else if(val==8){ //Device pumps up for 40 seconds GPIO_setHigh(myGpio, timeandreset); } else if(val==48){ //At this point a 0 V pulse sent for 3 seconds to turn the Omron off GPIO_setLow(myGpio, timeandreset); } else if(val==51){ //Omron rests until interval is reached - LED remains turned on until interval is reached GPIO_setHigh(myGpio, timeandreset); if(SBP >= 160 || DBP >= 110) { GPIO_setHigh(myGpio, LED1); } if(SBP >= 140 && SBP < 160 || DBP >= 90 && DBP < 110) { GPIO_setHigh(myGpio, LED2); } if(SBP < 140 && DBP < 90) { GPIO_setHigh(myGpio, LED3); } } //buzzer sounds if higher level is reached if(val>51 && val<53 && (SBP >= 160 || DBP >= 110)) { level1=1; if(level1+level2+level3>2) { GPIO_setHigh(myGpio, buzzer); level2=0; level3=0; } } if(val>51 && SBP < 160 && DBP < 110 && (SBP >= 140 || DBP >= 90)) { level1=0; level2=1; if(level2+level3>2) { GPIO_setHigh(myGpio, buzzer); level3=0; } } if(val>51 && SBP < 140 && DBP < 90) { level1=0; level2=0; level3=1; } //buzzer turns off after 10s if(val>53){ GPIO_setLow(myGpio,buzzer); } if(val==interval){ interruptCount = 0; GPIO_setLow(myGpio, LED1); GPIO_setLow(myGpio, LED2); GPIO_setLow(myGpio, LED3); } } } /* functions */ void gpio_init(void){ // set up GPIO's for nokia //GPIO_setMode(myGpio, nokiaVcc, GPIO_0_Mode_GeneralPurpose); GPIO_setMode(myGpio, nokiaRst, GPIO_0_Mode_GeneralPurpose); GPIO_setMode(myGpio, nokiaDc, GPIO_0_Mode_GeneralPurpose); GPIO_setMode(myGpio, nokiaBlight, GPIO_0_Mode_GeneralPurpose); GPIO_setMode(myGpio, nokiaSce, GPIO_0_Mode_GeneralPurpose); //GPIO_setDirection(myGpio, nokiaVcc, GPIO_Direction_Output); GPIO_setDirection(myGpio, nokiaRst, GPIO_Direction_Output); GPIO_setDirection(myGpio, nokiaDc, GPIO_Direction_Output); GPIO_setDirection(myGpio, nokiaBlight, GPIO_Direction_Output); GPIO_setDirection(myGpio, nokiaSce, GPIO_Direction_Output); //GPIO_setPullUp(myGpio, nokiaVcc, GPIO_PullUp_Disable); GPIO_setPullUp(myGpio, nokiaRst, GPIO_PullUp_Disable); GPIO_setPullUp(myGpio, nokiaDc, GPIO_PullUp_Disable); GPIO_setPullUp(myGpio, nokiaBlight, GPIO_PullUp_Disable); GPIO_setPullUp(myGpio, nokiaSce, GPIO_PullUp_Disable); return; } void spi_init(void){ // enable Spia clock CLK_enableSpiaClock(myClk); //set up GPIO's for SPI GPIO_setPullUp(myGpio, nokiaMosi, GPIO_PullUp_Disable); GPIO_setPullUp(myGpio, nokiaClk, GPIO_PullUp_Disable); GPIO_setQualification(myGpio, nokiaMosi, GPIO_Qual_ASync); GPIO_setQualification(myGpio, nokiaClk, GPIO_Qual_ASync); GPIO_setMode(myGpio, nokiaMosi, GPIO_16_Mode_SPISIMOA); GPIO_setMode(myGpio, nokiaClk, GPIO_18_Mode_SPICLKA); // Resets the serial peripheral interface (SPI) SPI_reset(mySpi); // Initializes the serial peripheral interface (SPI) object handle SPI_enable(mySpi); // Enables the serial peripheral interface (SPI) transmit and receive channels SPI_enableChannels(mySpi); // Enable master mode SPI_setMode(mySpi, SPI_Mode_Master); // Enables the serial peripheral interface (SPI) masater/slave transmit mode SPI_enableTx(mySpi); // Sets the serial peripheral interface (SPI) character length SPI_setCharLength(mySpi, SPI_CharLength_8_Bits); // Sets the serial peripheral interface (SPI) clock phase SPI_setClkPhase(mySpi, SPI_ClkPhase_Normal); // Sets the serial peripheral interface (SPI) clock polarity SPI_setClkPolarity(mySpi, SPI_ClkPolarity_OutputFallingEdge_InputRisingEdge); // Enables the serial peripheral interface (SPI) interrupt SPI_enableInt(mySpi); // Sets the serial peripheral interface (SPI) baud rate SPI_setBaudRate(mySpi, (SPI_BaudRate_e)0x00); // enable the SPI SPI_enable(mySpi); // Set so breakpoints don't disturb xmission SPI_setPriority(mySpi, SPI_Priority_FreeRun); PIE_registerPieIntHandler(myPie, PIE_GroupNumber_6, PIE_SubGroupNumber_1, (intVec_t)&spiRxFifoIsr); PIE_enableInt(myPie, PIE_GroupNumber_6, PIE_InterruptSource_SPIARX); CPU_enableInt(myCpu, CPU_IntNumber_6); return; } interrupt void spiRxFifoIsr(void) { GPIO_setHigh(myGpio, nokiaSce); //set Sce high SPI_read(mySpi); // Issue PIE ack PIE_clearInt(myPie, PIE_GroupNumber_6); return; } interrupt void cpu_timer0_isr(void) { interruptCount = interruptCount++; // Acknowledge this interrupt to receive more interrupts from group 1 PIE_clearInt(myPie, PIE_GroupNumber_1); } interrupt void adc_isr(void) { Voltage1[ConversionCount] = ADC_readResult(myAdc, ADC_ResultNumber_1); //interval Voltage2[ConversionCount] = Voltage1[ConversionCount]*3300; Voltage3[ConversionCount] = Voltage2[ConversionCount]/4096; Voltage5[ConversionCount] = ADC_readResult(myAdc, ADC_ResultNumber_2); //pressure Voltage6[ConversionCount] = Voltage5[ConversionCount]*3300; Voltage7[ConversionCount] = Voltage6[ConversionCount]/4096; Voltage8[ConversionCount] = ADC_readResult(myAdc, ADC_ResultNumber_3); //motor Voltage9[ConversionCount] = Voltage8[ConversionCount]*3300; Voltage10[ConversionCount] = Voltage9[ConversionCount]/4096; Sum_Volt3=Voltage3[ConversionCount]+Sum_Volt3; //interval Sum_Volt7=Voltage7[ConversionCount]+Sum_Volt7; //pressure Sum_Volt10=Voltage10[ConversionCount]+Sum_Volt10; //motor //Clears screen periodically if(LoopCount == 99) { LoopCount = 0; clear(); } else LoopCount++; // If 30 conversions have been logged, start over if(ConversionCount == 29) { ConversionCount = 0; Mean_Volt3=Sum_Volt3/30; //Mean of interval Mean_Volt7=Sum_Volt7/30; //Mean of pressure Mean_Volt10=Sum_Volt10/30; //Mean of motor Sum_Volt3=0; Sum_Volt7=0; Sum_Volt10=0; if (val<5){ //baseline measured baseline=Mean_Volt7; } Peqn = (slope*Mean_Volt7-slope*baseline)/100; } else ConversionCount++; if(number <10){ arraypres[number]=100+number; number = number+1; } writeString(1,0,"Pressure:"); writeString(35,1,"mmHg"); writeString(1,2,"Voltage:"); writeString(35,3,"mV"); writeString(1,4,"Interval:"); int t=Mean_Volt7; //voltage from pressure sprintf(value0,"%d",t); writeString(1,3,value0); int y_2=Peqn; //pressure sprintf(value2,"%d",y_2); writeString(1,1,value2); if(Mean_Volt3<100){ writeString(1,5,"15 min"); interval=15*60; } else if(Mean_Volt3>=100 && Mean_Volt3<500){ writeString(1,5,"30 min"); interval=30*60; } else if(Mean_Volt3>=500 && Mean_Volt3<900){ writeString(1,5,"1 hr "); interval=60*60; } else if(Mean_Volt3>=900 && Mean_Volt3<1300){ writeString(1,5,"2 hrs "); interval=120*60; } else if(Mean_Volt3>=1300){ writeString(1,5,"3 hrs "); interval=240*60; } // Clear ADCINT1 flag reinitialize for next SOC ADC_clearIntFlag(myAdc, ADC_IntNumber_1); // Acknowledge interrupt to PIE PIE_clearInt(myPie, PIE_GroupNumber_10); i++; return; } Share this post Link to post Share on other sites
emailcausey 0 Posted July 11, 2014 What is odd is if I make the array very large (100) then the first 15 values are inaccurate and the rest are accurate. Any ideas? Share this post Link to post Share on other sites
TI_Trey 38 Posted July 15, 2014 My guess is that the problem is related to signed/unsigned integers. The variable number is signed while you're array is not. I would try viewing the results as hex and see if you can see a pattern... You might also want to try stepping through and looking at the variables in the arithmetic (as hex values)...I think you'll see the problem. Share this post Link to post Share on other sites
