LPCXpresso IDEのトピックRe: LPCxpresso Ethernet

LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:28 GMT

Content originally posted in LPCWare by johnnyalexa on Mon Jan 24 04:05:49 MST 2011
Hello to all,

I am a newbie in LPC, I have two LPCxpresso 1769 boards ( big plans).

My main purpose is to understand and write ethernet applications, so I have compiled easyweb demo. Maybe I don't have the right rj45 connection,cause the aplication isn't working (I can't make a network connection with it, using crossover cable). If I have to modify something in the code before runing it, please let me know. And also how can I determine what kind of internal connection my rj45 connector has.

Thanks

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:29 GMT

Content originally posted in LPCWare by whitecoe on Mon Jan 24 07:18:30 MST 2011
I would think that the most obvious cause of problems with this example would be the IP address. Have you modified the IP address used by easyweb to match your network setup? The need to do this is documented in the project readme file.

HTH!

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:30 GMT

Content originally posted in LPCWare by igorsk on Mon Jan 24 07:32:30 MST 2011
Do you have a PHY chip between the processor and network cable? AFAIK LPCXpresso doesn't have an Ethernet PHY on board, so you need an external one.

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:30 GMT

Content originally posted in LPCWare by Ex-Zero on Mon Jan 24 07:55:22 MST 2011
Yes, he has :)
New LPCXpresso1769 boards are shipped with SMSC8720A.

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:31 GMT

Content originally posted in LPCWare by NXP_Europe on Mon Jan 24 09:22:25 MST 2011
Hello johnnyalexa,

coupling two devices is possible, but not easy! Special software is needed for using two slaves.
In principle the devices are both slaves and waiting for an IP-address ... which is not coming. Normally the IP-address is provided by a host e.g. a hub or router.

Did you try to connect the devices to a router?

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:32 GMT

Content originally posted in LPCWare by Ex-Zero on Mon Jan 24 09:50:03 MST 2011
Just made a test with my LPC1769 board:

Example: RDB1768cmsis_EasyWeb (included in RDB1768cmsis.zip)

1. Import sample, change MCU Settings to LPC1769

2. Delete LCD function calls in easyweb.c / LCD library in Properties->C/C++ Build->Settings->Tool Settings->MCU Linker->Libraries

3. Change MYIP_1-4 to valid local IP address

4. Connect RD+ / RD- / TD+ / TD- to PC (cross-over) or Switch

5. Start debug session

6. Control 2 red PHY-LEDs on LPC1769 board (should flash / blink if RD/TD connection is correct)

7. Start Network Scanner (to look for valid IP address) or use browser and open MYIP_1.MYIP_2.MYIP_3.MYIP_4

Note: Description of crossover cable / connection: http://en.kioskea.net/contents/elec/rj45croise.php3

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:32 GMT

Content originally posted in LPCWare by johnnyalexa on Mon Jan 24 10:48:21 MST 2011
Hi,

I will sure try. I know how to wire a crossover cable. My question was about the rj45 connector on the board (with integrated magnetic ), cause I just buy one, but dunno the pinout of it. In the baseboard schematic,ETH_TXP is on 1st pin, ETH_TXN on the 3rd, ETH_RXP on the 4th, and ETH_RXN on the 6th. Pin 8 is on ground and 2&5 on 3.3V. If you have a schematic of this connection or ...where do I have to read on the rj45 connector the type of it ( I know it's a letter that tells you what kind of internal connection it has).

Thanks in advance,

John

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:33 GMT

Content originally posted in LPCWare by jharwood on Mon Jan 24 11:44:53 MST 2011
It appears that the LAN8720 supports auto-crossover by default, provided proper symmetrical magnetics and termination are used. (section 3.3 of the data sheet).

To figure out the connections to the jack, take a look at section 3.9.4 of the 8720 data sheet. The 49.9 ohm resistors are already installed on the LPCXpresso board, most of everything to the right of those on the diagram should be included in the mag-jack.

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:33 GMT

Content originally posted in LPCWare by Ex-Zero on Mon Jan 24 14:22:52 MST 2011
Sounds like:

http://www.farnell.com/datasheets/79319.pdf

Base Board pictures show:

http://www.belfuse.com/Data/Datasheets/SI-50170-F.pdf

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:34 GMT

Content originally posted in LPCWare by Ex-Zero on Tue Jan 25 07:06:24 MST 2011
Just made a test with LPCXpresso1769 board auto-crossover:

I've changed RD and TD to (wrong) crossover and it's still working, so indeed Auto-MDIX is working as described in Chapter 3.3 HP Auto-MDIX Support

http://www.smsc.com/media/Downloads_Public/Data_Sheets/8720a.pdf

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:35 GMT

Content originally posted in LPCWare by johnnyalexa on Tue Jan 25 07:55:00 MST 2011
I guess, first sign of a correct connection of the rj45 with integrated magnetics on board, is the blinking of one led from LPCXpresso. Currently no led is blinking, so I guess I don't have the correct connection yet. I have a crossover cable ( correctly done ), and I'm trying to conect to the PC. If you have more hints about how to connect and what modifications have to be done, please tell me. As for the links you send, I don't know what kind of board connector I have. It could be one with the same internal connections, but it could be different. And I don't know how to distinguish the type of connector. Anyway, I'll keep you up-to-date with my evolution.

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:35 GMT

Content originally posted in LPCWare by Ex-Zero on Tue Jan 25 08:15:56 MST 2011

Quote:
I don't know what kind of board connector I have

Board ? What hardware are we talking about? LPCXpresso1769 and :confused:

Are you trying to connect an unknown board, MagJack or RJ45 connector?

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:36 GMT

Content originally posted in LPCWare by elainipereira on Tue Jan 25 08:52:43 MST 2011
Hi all,

IÂ´m new with NXPÂ´s microcontrollers and I have some problems. IÂ´m using the LPCXpresso Base Board with LPC1769 LPCXpresso Board, and I need to do a communication between the LPC and my computer using TCP/IP protocol.

The â€œeasywebâ€ example works fine. But now I need to make a simple communication between the board and my computer just by sending and receiving tcp / ip packets that I created.

Can someone help me to understand how to use "TCPReleaseRxBuffer()" and "TCPTransmitTxBuffer" to send/receive a packet TCP from a specif IP?

Thanks.

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:37 GMT

Content originally posted in LPCWare by johnnyalexa on Tue Jan 25 11:05:15 MST 2011

Quote: Zero
Board ? What hardware are we talking about? LPCXpresso1769 and :confused:

Are you trying to connect an unknown board, MagJack or RJ45 connector?

A MagJack. http://www.fileshare.ro/14670440373.6

You can see there that there are more than one connection type and I don't know what connector I have(there is nothing written on it).

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:37 GMT

Content originally posted in LPCWare by Ex-Zero on Tue Jan 25 11:24:26 MST 2011
And why don't you measure it :confused:

The resistance between P8 and P6 should show a coil (low resistance) or not. Is there a coil use Type B, else use Type A.

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:38 GMT

Content originally posted in LPCWare by jharwood on Tue Jan 25 12:12:34 MST 2011

Quote: elainipereira
Hi all,

IÂ´m new with NXPÂ´s microcontrollers and I have some problems. IÂ´m using the LPCXpresso Base Board with LPC1769 LPCXpresso Board, and I need to do a communication between the LPC and my computer using TCP/IP protocol.

The â€œeasywebâ€ example works fine. But now I need to make a simple communication between the board and my computer just by sending and receiving tcp / ip packets that I created.

Can someone help me to understand how to use "TCPReleaseRxBuffer()" and "TCPTransmitTxBuffer" to send/receive a packet TCP from a specif IP?

Thanks.

Take a look at Adam Dunkel's uIP website : http://www.sics.se/~adam/uip/index.php/Main_Page click on the uIP documentation link, click the online (HTML) format link, then Examples. The 'hello world' example would probably be the easiest to start with.

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:39 GMT

Content originally posted in LPCWare by CodeRedSupport on Tue Jan 25 15:04:36 MST 2011

Quote: jharwood
Take a look at Adam Dunkel's uIP website : http://www.sics.se/~adam/uip/index.php/Main_Page click on the uIP documentation link, click the online (HTML) format link, then Examples. The 'hello world' example would probably be the easiest to start with.

A port of uIP to the LPC17xx is provided as part of the RDB1768 examples suite, which is provided as part of your LPCXPresso IDE installation.

http://support.code-red-tech.com/CodeRedWiki/SuppliedExamples

Regards,
CodeRedSupport

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:40 GMT

Content originally posted in LPCWare by jharwood on Tue Jan 25 15:22:20 MST 2011

Quote: CodeRedSupport
A port of uIP to the LPC17xx is provided as part of the RDB1768 examples suite, which is provided as part of your LPCXPresso IDE installation.

http://support.code-red-tech.com/CodeRedWiki/SuppliedExamples

Regards,
CodeRedSupport

Yes, the questioner already has been able to build and run the EasyWeb example.

For explanations of really simple usage, it is all described in the uIP API documentation and examples.

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:40 GMT

Content originally posted in LPCWare by CodeRedSupport on Wed Jan 26 00:52:20 MST 2011

Quote: jharwood
Yes, the questioner already has been able to build and run the EasyWeb example.

For explanations of really simple usage, it is all described in the uIP API documentation and examples.

Indeed, but I am highlighting that the RDB1768 examples provide ports of both Andreas Dannenberg's EasyWeb and Adam Dunkel's uIP.

The two are completely different applications. Easyweb is much simpler than uIP. But uIP is more powerful, expandable, and, as you point out, much better documented.

Regards,
CodeRedSupport

Re: LPCxpresso Ethernet

lpcware — Thu, 16 Jun 2016 00:19:41 GMT

Content originally posted in LPCWare by elainipereira on Thu Jan 27 05:47:52 MST 2011

Quote: CodeRedSupport
Indeed, but I am highlighting that the RDB1768 examples provide ports of both Andreas Dannenberg's EasyWeb and Adam Dunkel's uIP.

The two are completely different applications. Easyweb is much simpler than uIP. But uIP is more powerful, expandable, and, as you point out, much better documented.

Regards,
CodeRedSupport

I am trying to use the uIP as you suggested, but I did not have success yet.

My lpcxpresso base board never sends a packet.

This is my code:

#define MYIP_1192
#define MYIP_2168
#define MYIP_320
#define MYIP_432

#include "LPC17xx.h"
#include "timer.h"
#include "uip.h"
#include "uip_arp.h"
#include "tapdev.h"

#define UIP_APPCALL       example1_app

void example1_app(void) {
   if(uip_newdata() || uip_rexmit()) {
      uip_send("ok\n", 3);
   }
}

int main(void)
{
unsigned int i;
uip_ipaddr_t ipaddr;/* local IP address */
struct timer periodic_timer, arp_timer;

// two timers for tcp/ip
timer_set(&periodic_timer, CLOCK_SECOND / 2); /* 0.5s */
timer_set(&arp_timer, CLOCK_SECOND * 10);/* 10s */

// ethernet init
tapdev_init();

// Initialize the uIP TCP/IP stack.
uip_init();

uip_ipaddr(ipaddr, MYIP_1,MYIP_2,MYIP_3,MYIP_4);
uip_sethostaddr(ipaddr);/* host IP address */
uip_ipaddr(ipaddr, MYIP_1,MYIP_2,MYIP_3,1);
uip_setdraddr(ipaddr);/* router IP address */
uip_ipaddr(ipaddr, 255,255,255,0);
uip_setnetmask(ipaddr);/* mask */

        uip_listen(HTONS(1234));

        while(1)
{
}
}

I send a packet from my PC to IP 192.168.20.32 in the port 1234. But the microcontroller never sends a packet as answer.

Can someone please, help me?

Thanks.