Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi,
I am have problem with receive callback function. I have debugged the lwip udp_input() function and it doesn't found any matching pcb and receive callback function is also not called. UDP_Init() is called from main().
UDP_Init()
{
void *pcb;
pcb = udp_new();
udp_recv(pcb...
Yes this is also an option. Now if I want to turn off the LED I have to give High logic at output, right?
And also anode has to be pulled to 5V and output of latch is not exactly 5V when high logic. It typically has 4.2V approx I think. So I mean there won't be any problem with that?
Hi,
I want to source about 25mA to optocoupler and it should in latched state so I am using 74ls373 latch for that. It has sourcing capability of only 2.6mA, So I am thinking of adding pull-up resistor pulled to 5V on the output of latch and its outputs are tri-state. So is it correct design...
I am using LM3S6965 TI microcontroller. It is not clearly mentioned about input and output impedence. Actually I have to interface JTAG signals TDI,TCK,TMS,TDO signals. I am thinking of adding 27ohms series resistors for signal integrity. So i am confused about current sinking and sourcing...
So If I add 27ohms series resistor to the GPIO pin and this pin is input, there will be no sink current problem? Actually this signal is high frequency coming from external debugger into the microcontroller. so if I calculate current, is it correct formula: I = 5 volts/(27 + few hundred kilo ohms)?
Hi,
I am using LM3S6965 microcontroller which uses JTAG standard for programming. It is an ARM core and uses standard 20-pin connector for programming the controller. My question is, can I use 20-pin to 6-pin cable with 20-pin connector on external debugger (JLINK) and 6-pin connector on target...
ok
If I use pull up resistors on pin 5,7,9,13 and TRST instead of series resistors using jtag 20-pin connector for LM3s6965, will it function?
What is the main advantage of using series resistors for jtag programming as used in evaluation kit of lm3s6965?
My programs for each microcontroller is different. If I understand your post, you run 20 uP from a single external clock source and it worked perfectly? Is there any timing issue; I mean if three different instructions of three micrcontrollers running from three different clock sources takes 1us...
ok
Can I use single clock source (external 8MHz) for three microcontrollers. Will microcontrollers work in parallel, i mean only one instruction of one microcontroller can be executed or instructions of all three uC be executed at the same time (parallel processing)?
Hi,
I am using three LM3S6965 microcontrollers. I have question regarding programming these microcontrollers. Can I program all three microcontroller with a single jtag connector? Firmware for each microcontroller is different.
Thanks
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
