Re: Any low pin count 430's with a sigma-delta adc input buffer amp?

Started by Matthias Weingart in MSP4308 years ago 2 replies

Kirk ask for a OpAmp inside a small MSP. The 2013 does not contain a OpAmp. Just the SD16 with 200kOhm input impedance. To be more specific - he...

Kirk ask for a OpAmp inside a small MSP. The 2013 does not contain a OpAmp. Just the SD16 with 200kOhm input impedance. To be more specific - he ask for a high impedance ADC. I have used the ADC12 as a ADC with a high impedance input. Solution is to increase sample time to measure high impedance networks. You need to charge the 40pF input capacitor (this is inside the MSP430). To get th...


ADC pin not in HiZ .. or is it ?!!

Started by morarcalin in MSP4308 years ago 3 replies

Ok .... I am relatively new to MSP430 - I am using the values series (more precise MSP430G2553) and I want to measure/convert 20V on A1 P1.1 -...

Ok .... I am relatively new to MSP430 - I am using the values series (more precise MSP430G2553) and I want to measure/convert 20V on A1 P1.1 - of course using a simple voltage divider to stay between 0 and 3.6V (I am using Vss and Vcc as refferece). Based on TI's datasheet using the ADC cannot seem to be more straight forward but I have one thing that is driving me crazy ... no matter what ...


How to calibrate ADC

Started by eZ430-Learner in MSP43011 years ago 3 replies

Hi,,,, every one I have written a simple progra to perform ADC and simple display using Prin= tf().. This is the code =A0 SD16CCTL0 =3D...

Hi,,,, every one I have written a simple progra to perform ADC and simple display using Prin= tf().. This is the code =A0 SD16CCTL0 =3D SD16SNGL +SD16IE + SD16UNI ;=A0 // single conversion + in= terrupt enable +=A0=A0 UNI mode + 256 OSR=20 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 =A0 SD16AE =3D SD16AE1;=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 // P1.1...


EXP Board LCD Characters not always displaying

Started by cvrider in MSP43011 years ago

I am using the msp430FG4618 EXP Board to send ADC readings to the LCD screen. My issue is some characters on the LCD do not always show up as...

I am using the msp430FG4618 EXP Board to send ADC readings to the LCD screen. My issue is some characters on the LCD do not always show up as the ADC value changes. Sometimes the LCD will show all segments correctly and as I change the ADC value, some segments don't display or do not display properly. Am I sending values to the LCD too quickly that it doesn't update the segments? Any hel...


ADC Conversions type

Started by Technical Kripa in MSP43010 years ago 4 replies
ADC

What is the difference between "sequence of conversions" and "single conversion" for ADC in MSP430?? Yahoo! recommends that you upgrade to...

What is the difference between "sequence of conversions" and "single conversion" for ADC in MSP430?? Yahoo! recommends that you upgrade to the new and safer Internet Explorer 8. http://downloads.yahoo.com/in/internetexplorer/ ------------------------------------


DMA transfer of ADC sequnce

Started by ingarf2002 in MSP43015 years ago
ADC

Hi I'm trying to setup a repeating DMA transfer of a ADC repeating sequnce to an array. When I run this code and exit from my setup...

Hi I'm trying to setup a repeating DMA transfer of a ADC repeating sequnce to an array. When I run this code and exit from my setup function the controller dies on me. Seems like it jumps all over the place. I'm using the following setup code: void InitADC(void) { memset(ADCmemory, 0, sizeof(ADCmemory)); // ADC setup P6SEL = 0x07; // (A0-A2 = P6.0-P6.2) ADC12CTL0|=SHT0_8; //


adc control

Started by pilielejoste in MSP43016 years ago
ADC

Hi folks! I'm working with the MSP430F449 microcontroller and i just want to make some measures every 20 s (more OR less) AND SWITCH OFF the...

Hi folks! I'm working with the MSP430F449 microcontroller and i just want to make some measures every 20 s (more OR less) AND SWITCH OFF the reference output. I use the Vref inyecting 2.5V and i catche the signal across my peripheral cyrcuit at P6.0/A0. I would like to reduce consumption, tht's the reason why i want to sleep and weak up the adc all the time. Any ideas? how could i mak


ADC noise caused by external crystal oscillator

Started by elcoqui00 in MSP43014 years ago 7 replies
ADC

Hello: I'm using the MSP430F149 ADC unit to sample a sinusoidal signal from a waveform generator. Whenever I run the program, a high...

Hello: I'm using the MSP430F149 ADC unit to sample a sinusoidal signal from a waveform generator. Whenever I run the program, a high frequency sinusoidal noise is added to the ADC input signal. I noticed that the noise sinusoid has a frequency of 4.8MHz which is the frequency of the external crystal oscillator I am using as system clock. If I turn this external oscillator off and use t


ADC12 timer overruns: I can't get rid of them ...

Started by jamie_risk in MSP43013 years ago
ADC

I can't configure the ADC without getting TOV for every conversion it does. Well that's not entirely true, I can, but not in the...

I can't configure the ADC without getting TOV for every conversion it does. Well that's not entirely true, I can, but not in the syncronized clocking manner I'd like. Essentially, my registers for the ADC control are setup: ADC12CTL0 = ADC12ON + ADC12OVIE + ADC12TOVIE; ADC12CTL1 = CSTARTADD_0 + SHS_2 + ADC12DIV_0 + ADC12SSEL_2 + CONSEQ_3; I'm using all 16 channels.


ADC Sample Rate

Started by Alesandro Correa in MSP43011 years ago 7 replies
ADC

Hi all, =20 Someone able to use a ADC at 200ksps? I have used MSP430F2619 at 16MHz with= DCO clock. =20 I=B4m not obtain speeds over...

Hi all, =20 Someone able to use a ADC at 200ksps? I have used MSP430F2619 at 16MHz with= DCO clock. =20 I=B4m not obtain speeds over 37ksps. =20 My configs: =20 ADC12CTL0 =3D SHT0_0 + ADC12ON; //This SHT0_0 is not correct,= I change this value several times only test. ADC12CTL1 =3D SHP; = ADC12IE =3D 0x01; ADC12CT...


ADC help for newbie

Started by kevinisanonymous in MSP43015 years ago 4 replies
ADC

Hi everyone, I am trying to wrap my brain around this whole embedded programming thing. I am trying to set up the ADC to do a repeated...

Hi everyone, I am trying to wrap my brain around this whole embedded programming thing. I am trying to set up the ADC to do a repeated conversion on a sequence. Rather than post code I first want to make sure I am at least thinking in the correct direction. So here is my question: Do I set up Timer A or B to continuous & toggle and use this for my sampling slock and let the ADCISR


AC voltage and data acquisition with MSP

Started by linked82 in MSP43014 years ago
ADC

Hi all, I would like to acquire a sinusoidal waveform from the AC outlets with the ADC of my MSP430F449, that features AD12. Before that,...

Hi all, I would like to acquire a sinusoidal waveform from the AC outlets with the ADC of my MSP430F449, that features AD12. Before that, I would like to know what protections I should take. My circuit reduces the signal from 220 Vrms to 6V rms (about 8.64 Vp) with a transformer, and then divides the signal down to the 2.5Vpp to get the ADC. Before that, I should create a virtual ground


Re: Too simple, keypad interface?

Started by "Robert J. Wilson" in MSP43013 years ago
ADC

Hi, --- In m...@yahoogroups.com, "old_cow_yellow" wrote: > > One pin can both generate interrupt and identify the key pressed. > > ...

Hi, --- In m...@yahoogroups.com, "old_cow_yellow" wrote: > > One pin can both generate interrupt and identify the key pressed. > > Example: > > 18K from Vcc to one of the digital/ADC inputs. > 0R, 2K, and 4.3K from same digital/ADC input to column-1, -2, and -3 > respectively. > 0R, 470R, 1K, and 1.5K from Gnd to row-1, -2, -3, and -4 respectively. > > When


Looking for a simple code for ADC on IAR

Started by v_shukla72 in MSP43011 years ago 4 replies

I have a board and I want a simple code that will read the ADC. I appreciate your help. Any existing example or tutorial will...

I have a board and I want a simple code that will read the ADC. I appreciate your help. Any existing example or tutorial will help ------------------------------------


Adc software issue

Started by pilielejoste in MSP43016 years ago
ADC

Hi folks! I work with a MSP430F449 microcontroller and I have some problems to control the ADC ( well, i'm sure it's not a hardware problem,...

Hi folks! I work with a MSP430F449 microcontroller and I have some problems to control the ADC ( well, i'm sure it's not a hardware problem, i pretty convinced it's because my soft ;-P) I just want to make a measure every 20 seconds and disable the rest of time in order to reduce consumption. I use the Vref to inyect into my periferal cyrcuit a 2.5V signal and I catch the result in P6.0/A0 ...


ADC10 reference?

Started by hc08jb8 in MSP43015 years ago 1 reply

Hello All Is it possible to get the value of the supply voltage or other reference used by the 10bit ADC in the F1232? I want to record the...

Hello All Is it possible to get the value of the supply voltage or other reference used by the 10bit ADC in the F1232? I want to record the ADC channel 1 value as well as the reference to it. Thanks Jay


what about MSP430's ADC?

Started by 380121850 in MSP43011 years ago 6 replies
ADC

Did anyone test the noise free bits of msp430's ADC? I just want to know that how many bits the ADC can reach? eg, ADC12,the noise free bits can...

Did anyone test the noise free bits of msp430's ADC? I just want to know that how many bits the ADC can reach? eg, ADC12,the noise free bits can be 11 bits? THANKS! ------------------------------------


ADC10 problem , MSP1232

Started by nerdy_om in MSP43016 years ago 7 replies

Here is a breif statement of my application that I started implementing in MSPF1232,using IAR Assembly, a few weeks ago. With a huge task...

Here is a breif statement of my application that I started implementing in MSPF1232,using IAR Assembly, a few weeks ago. With a huge task ahead, at my first job project,and first on MSP, now I am still in the beginning itself as the on chip ADC seems unreliable. Ps: Jump to end of the mail (No.3)to look about the ADC problem specifically. -------------------- x ---------------------


Can we use 8-bits for the ADC ( MSP430F149)

Started by MA in MSP43014 years ago 1 reply
ADC

Hello I am new in DSP programming and i would like to ask how we can program the ADC with 8-bits instead of 12-bits ( i am using the...

Hello I am new in DSP programming and i would like to ask how we can program the ADC with 8-bits instead of 12-bits ( i am using the MSP430F149) ! Can anyone advice me where i can find some C codes examples from the internet! Any information related to the MSP430 processor familly will be helpfull! Thank you for taking your time to read this message! ---------------------------------


PCB layout for ADC

Started by merapcb in MSP43010 years ago
ADC

Hi friends. I am looking for a practical example of a PCB (double sided) to learn how to lay out the ADC circuit properly. I understand that...

Hi friends. I am looking for a practical example of a PCB (double sided) to learn how to lay out the ADC circuit properly. I understand that digital and analog grounds have to be separate, and that they should only be connected at one point, but "seeing is understanding" so this is why I am looking for an example of such a design/layout/PCB. Thanks! (PS - I am using 1612 and 169) ------------...