Forums Search for: RS232
[msp430] problems setting 8MHz CPU frequency
inHi, I'm trying to clock the CPU (MSP430F1611) to 8,000,000 Hz and I've run into some problems. Making the CPU to actually run at 8MHz was...
Hi, I'm trying to clock the CPU (MSP430F1611) to 8,000,000 Hz and I've run into some problems. Making the CPU to actually run at 8MHz was easy enough: DCOCTL = DCO0 + DCO1 + DCO2; /* 0xE0 */ BCSCTL1 = XT2OFF + RSEL0 + RSEL1 + RSEL2; /* 0x87 */ However, the UART1 stopped working. What I've got so far is: void uart1_init( unsigned int ubr ) { /* RS232 */ P3DIR &= ~0...
LNK1136: invalid or corrupt file Flash2808_API_V302.lib
inHi, I am trying to develop a Flash program utility using RS232 serial communication for TMS320F2808 target board with out using any...
Hi, I am trying to develop a Flash program utility using RS232 serial communication for TMS320F2808 target board with out using any compile tools(like Code Composer Studio), and eliminating the manual intervention. My main intention is to avoid manual intervention and perform the Flash operations through command line, once i open a communication channel(COM port) and SCI A/B channel. I a...
Best Method to Download Data from a datalogger?
inHi All, So my company has a datalogger for trucks and etc. It's a simple black box design, nothing too fancy about it. Right now the clients...
Hi All, So my company has a datalogger for trucks and etc. It's a simple black box design, nothing too fancy about it. Right now the clients download data by bringing a laptop to the truck, plugging a null modem cable into the RS232 of the black box and downloading the data as a text file via HyperTerminal. We want to make this process easier for our clients. I have the fun task of e...
High speed (230K) RS232 drivers?
inGee Wee, the customer is not happy with 115K. We already determined that TI's MAX232 works up to 115K and the MAX3232 won't even work at 115K...
Gee Wee, the customer is not happy with 115K. We already determined that TI's MAX232 works up to 115K and the MAX3232 won't even work at 115K (although it claims to work). I know there are pin-incompatible MAX-something, but we don't want to change layout, just for the sake of in-compatibility. Are there pin-compatible, reliable MAX232 clones for 230K that work, not just claim to work? Th...
WLAN<->serial converter
inHi! Can anyone give me some links to WLAN serial(USB or RS232) converters, please? It may be an integrated chipset solution, an embedded...
Hi! Can anyone give me some links to WLAN serial(USB or RS232) converters, please? It may be an integrated chipset solution, an embedded board solution or even a ready device built in a case. Google gives me products of the following solution: serial-LAN-converter connected to a LAN-WLAN-converter, I hope there is a smarter way. Thanks!
ICP Wafer 5820 Instrument Graphics
inAny software, freeware that can be purchased that can operate using instrument type graphics. For example on the large comercial aircraft they...
Any software, freeware that can be purchased that can operate using instrument type graphics. For example on the large comercial aircraft they use just one display screen using graphics to show fuel levels, voltage readings, data of engine performance. Is there software around that can read the RS232 port and show a analog meter on the screen like a digital meter, instead of using a osci...
Developing interrupt driven serial driver
inGreetings: I am writing driver code for the serial communications interface (SCI) of the TI TMS320F2812. So far I have been developing a...
Greetings: I am writing driver code for the serial communications interface (SCI) of the TI TMS320F2812. So far I have been developing a set of functions analagous to C stdio stream IO calls that allow me to communicate via a RS232 link to a PC. The 16-byte receive and transmit FIFOs are utilized by the lowest level getc/putc functions. The other functions merely call getc/putc: ...
need help finding voice modem
inI need to find a basic rs232 voice modem for a proof of concept device. The final product will have the functionality built in but for now I...
I need to find a basic rs232 voice modem for a proof of concept device. The final product will have the functionality built in but for now I need an external solution. The application will generate DTMF codes, and send a voice message. The modem needs basic hayes commands, enough to go off hook and dial out, send a message and hang up or hold the line open. ARM9 processor running ...
LED Display
inHi All, I am working with a big LED display which interfaces with the PC by RS232 (9600 baud,no parity , 2 stop bits , 8 bit, no hardware...
Hi All, I am working with a big LED display which interfaces with the PC by RS232 (9600 baud,no parity , 2 stop bits , 8 bit, no hardware flow control ). I am trying to write my own application using cygwin on vista using open , read and write function calls. Every thing works data is comming out of com2 but is not read by the LED display , I have written a basic programm which sends data...
D-sub colder bucket connector with 4-40 UNC rivited jack posts
inI am trying to source male 9 way male D connectors solder bucket/cup with riveted female jack posts on the front face so I can make up RS232...
I am trying to source male 9 way male D connectors solder bucket/cup with riveted female jack posts on the front face so I can make up RS232 extension leads that can be screwed together. I know you can get Jack posts that have a nut to hold hem in place, but the problem there is that the nut will not fit inside the D shells, any help would be greatly appreciated. Thanks Steve j
library stdio.h of CCS C Compiler
inHi everybody, I use the CCS C Compiler to program the behavior of a robot (controled by a PIC 16F877) and I want to write some data from the...
Hi everybody, I use the CCS C Compiler to program the behavior of a robot (controled by a PIC 16F877) and I want to write some data from the PIC to a file via port serial RS232. But the problem is that "stdio.h" library of the compiler contains only 'getc', 'putc' but no file handling functions like 'fopen', 'fputc', fgetc', etc... Is there some solution i can use to perform "file handli...
Ezurio's UWScript and LPC2104
Hi all, I'm working on an application with a LPC2104 storing data on a memory card, which is connected through RS232 (using only the ground, TX...
Hi all, I'm working on an application with a LPC2104 storing data on a memory card, which is connected through RS232 (using only the ground, TX and RX) to an Ezurio's WIFI module. I programmed the microcontroller using C, and when I connect it on a computer to check whether it is working, everything is OK. Same goes for the WIFI module, programmed using Ezurio's UWScript. However, when I conne...
Does a PIC16F628 Serial Port Go To Sleep?
inHello! I am working on an serial RS232 RF link between two PIC16F628's. The master uses SEROUT to send a serial command such as...
Hello! I am working on an serial RS232 RF link between two PIC16F628's. The master uses SEROUT to send a serial command such as "*0001-5260*F" out to the cloud of slaves. The "*0001-5260*" is the address of one of the slaves, and the "F" is the command. The slave with that serial number responds, receives the string with SERIN, then verifies that the whole command was read (it must m...
Wireless cables replacement technology?
inI'm looking for a solution for wireless cable replacement. Basically I would like to have some wireless technology that replaces cables...
I'm looking for a solution for wireless cable replacement. Basically I would like to have some wireless technology that replaces cables from point A to point b-z. I'm thinking about more than one RS232 cable and I'll need to figure out the control mechanism for the control pins. Anyone have any ideas? I'd be willing to build it myself so any solutions would be of interest to me. Thanks ...
CMOS camera chip + microcontroller = Home made camera
inI am studying digital electronics and I need to build a low-resolution camera unit which can transmit the captured frame over an RS232 comm...
I am studying digital electronics and I need to build a low-resolution camera unit which can transmit the captured frame over an RS232 comm channel. I will use a CMOS camera chip and a low cost microcontroller (ATMega or PIC) because of limited student budget. Can you tell me if you can see any design tricks/pitfall on this project that I need to be aware of? Where can I order a low...
Does RS422/RS485 work on Advantech PCM-5820?
inI just received an unpleasant surprise when trying to use differential serial on the Advantech PCM-5820. The system has jumpers for the second...
I just received an unpleasant surprise when trying to use differential serial on the Advantech PCM-5820. The system has jumpers for the second serial port; RS232, RS422 or RS485. In either RS422 or RS485 mode, I see no activity at all on the TxD+/- pins. My software is asserting DTR and RTS, so I don't know what else I could possibly do to enable the drivers (and they should always be enab...
mscomm in vc++ - parity error
inHi, I'm writing some logging software for an embedded alarm panel design that uses an RS485 bus and proprietary protocol. I've attached the...
Hi, I'm writing some logging software for an embedded alarm panel design that uses an RS485 bus and proprietary protocol. I've attached the obligatory RS485 -> RS232 converter and connected to a free serial port on my PC. All good so far! Now, the alarm panel deliberately causes a parity error on the header byte of all packets transmitted on the bus. This parity error is used by all
can imperfect power reset damage flash programmable HC08 ?
inDear all, Can an imperfect power off reset, with the power supply going down to 0.5 V instead of required 0.1 V, damage flash programmable...
Dear all, Can an imperfect power off reset, with the power supply going down to 0.5 V instead of required 0.1 V, damage flash programmable HC08 chips? I have made a board with a micro and a RS232 line driver amongst other things, and I have been using Metrowerks to download the code. It worked ok for some time, it went to a few dozens of programming/debugging cycles, say 30, and the...
gdb stub for AVR: breakpoints and single stepping
inHello, I'm working on a `gdb stub' to allow debugging of code in an Atmel AVR processor using gdb running on the host platform. Communication...
Hello, I'm working on a `gdb stub' to allow debugging of code in an Atmel AVR processor using gdb running on the host platform. Communication between gdb and the stub is done over RS232. At this moment my platform is the at90can128, but other AVR types should work as well with little change. The stub is implemented as an interrupt handler on the serial-rx interrupt. When the ISR is acti...
PCB grounding
inHi to all, I am designing a PCB with a digital circuit based on a STM32F103 MCU with USB,LAN and RS232 ports. The power comes from an external...
Hi to all, I am designing a PCB with a digital circuit based on a STM32F103 MCU with USB,LAN and RS232 ports. The power comes from an external wall type 12V/2.5A switching type regulator. There are 3 grounds in my PCB : a digital ground (GND), a connector frame ground (FGND) which is connected to GND through a 3.9nF/1KV capacitor and the input ground (the common which comes from the external po...