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89 Threads found on Adc Uart
The code is confusing. Why wait 1 second then check if there is still data in the uart? Any data would ahve been sent long ago. You also seem to enable the GIE and PEIE bits inside a loop and at the same time not use interrupts anyway! As Klauss points out "TXREG = adc_value;" can at best only send 8 of the 10 adc bits. If you really want (...)
Hi everyone! I have a slight problem here. I am basically trying to sample 200 analog values using the adc inside dspic30f2020 and then sending them via uart to a matlab program. The thing is, I am sending these 200 values to matlab only once (as far as my understanding goes, in my code for dsPIC30F2020 given below, once we come out of the whil
hello friend, i was used an ic atemag32,in it i programmed and it work well for adc,uart,ext interrupt,timer all...but some days before i bought 3 new atmega32 ics,i placed it in my old board and burned the same old working program, but the adc is not working in new 3 ics...i am using avr studio complier.then i compired the fuse settings (...)
hello, what MCU ? post compiling windows message or log file .. any alerte message during compiling ? try to run you application with shorter lenght only adc and uart, then add functionalities ie: with eeprom ... Divide and conquer, as they say. be carrefull with 230V AC measure .. and earth current leakage any galvanic in
Are you using matrix keypad or 1 wire adc keypad ? What MCU are you using ? What Compiler are you using ? What is your crystal frequency ?
I have a Kinetis MCU design that senses temperature from a PTD using the internal 16-bit adc. It also has a uart that I use as a console port for development. When the uart is plugged in (to a FTDI cable), the adc input is very stable with all samples within a 3 unit range. When I unplug the uart, the (...)
adc/DAC pairs with serial interface, e.g. SPI, can't be never directly connected. They are both slave devices and need to be controlled by a master like a microcontroller or dedicated logic.
hello, just power up it with 3,3V ! but : Maximum Fosc is lower than with 5V. Chek BOR value if you use it. check adc convertions +Vref =3,3V default value Maximum internal voltage reference if used Use of Max3223 instead of Max232 for uart all other parameters...depend of your application
Hi, clearly, the LPC21XX is not supported much on the net. There are very few books about it. I would like some exercises involving GPIO, Interrupts, Timers, adc, uart etc. to give my students in order to start practicing on their board. Currently I am using the LPC2119 from futurlec. Regards, jonny
Hello everyone, right now i have the adc module (12-bits) which i convert it to BCD and then ASCII number since hyperterminal understand ASCII code. For uart TX module, i use the one in and it works but hyperterminal output multiple times like this . I believe some cont
read_adc=x; putchar(x); Meaned this? x=read_adc();putchar(x); AVR adc outputs 10-Bit data, so the code isn't particularly useful. And you want to write the data to USB rather than uart, where is the data sent by putchar()? If you send binary data over USB through virtual COM port protocol, you usually want some kind
Hi guys I want to sell Atmega 16 Development Boards with following specs: 2 uart ports (One for direct interfacing to the UsbAsp programmer). 8x3 IO port connecters. 8x1 adc interfacing connectors. Stable regulated on board power supply. Power Supply provisions : The Board can be powered wither externally or throu
hello, Give more details.. what is your full scale of milliamp for 5V on RA3 adc input ? with adc 10 bits => you will get 1024 pts for the full scale... How do you display the result ? uart -> RS232 -> terminal or on LCD 2x16 car or ?
The ECG signal can be connected to AVR-adc after being amplified to 5V. I presume you have a suitable preamplifier. Connecting "uart to optocoupler then to USB" is less clear. You need an USB interface chip like FT232 to connect uart to USB, maybe with optical isolation by an optocoupler.
If I removed the interrupt and put the adc code inside the while loop,it gives the same result:-( I would think that if the uart is running at 9600 baud (approx 960 characters/sec maximum - start bit, 8 data bits and one stop bit) you are not transmitting sufficient samples/sec to get meaningful results. I wo
hello, show you level shifter schematic.. do you add +2,5V to your signal 5V AC peak to peak ? have alook on this interface it's to measure main AC 230V => reduce to 1,6V efficace + 2,50V so adc input keept in the range 0 to 5V
I think you define the function to read adc in PIC and then apply following sprintf(char Variable , " %d " , Integer Variable) and print the Char Variable , and also make it simple like Check for The uart Code also in hyperterminal I mean whether it is simply reading char and printing char this will assure that uart is working
In my program, I measure the Maximum and minimum digital value form a LDR input. Then display Max, Min and the difference of Max and min this. But it shows a wrong answer for the difference. example Max = 722 and Min = 400; Difference = 326 (displayed value) but the correct one is 322 Please help me use 16F887 the cord segment i
Actually In my view first of all you need to try writing some Custom code on Hardware (preferably ARM core like LPC2148 board ) like uart communication from PC, using internal adc , keyboard interfacing .... then start integrating them in one application then you can use RTOS functionality to extend the codes .... refer this will help you - http
guys help me how to send adc value using uart in avr microcontroller.