I am grateful for you Jon Bean and Alister Fisher. With using a pbuf chain and employing tips in the link provided by Alister I achieved to transfer data about 72 Mbps speed. Now I am curious to know why the speed is far from 100 Mbps (the expected speed).
On Wed, Oct 7, 2020 at 1:35 AM Alister Fisher <alis...@advateklights.com> wrote: > The code you’ve sent are high software layers. Perhaps you need to check > the lower software layers can send pbuf chains. If you’re using ST’s HAL > and lwIP’s ethernetif.c, check out what I did for the STM32H7 at > https://community.st.com/s/question/0D50X0000C6eNNSSQ2/bug-fixes-stm32h7-ethernet. > The STM32F4 ethernet peripheral and driver would be different. > > > > Regards > > Alister > > > > *Alister Fisher* > Senior Software Developer > > [image: Advatek Lighting] > > 16/52 Corporate Blvd, Bayswater, VIC, 3153, AUSTRALIA > T: +61 3 8400 4566 > alis...@advateklights.com www.advateklights.com > <https://www.facebook.com/advateklights/> > <https://www.instagram.com/advatek/> > <https://www.twitter.com/user_name_here> > <https://www.linkedin.com/company/advateklighting> > <https://www.pinterest.com/user_name_here> > <https://www.youtube.com/channel/UCaWsu_GcWmDpcr7Il8tO8zg> > > <https://www.advateklights.com/pixlite-mk2-long-range-system-2020> > > *From:* lwip-users <lwip-users-bounces+alister= > advateklights....@nongnu.org> *On Behalf Of *Mohammad Tavakoli > *Sent:* Tuesday, 6 October 2020 11:24 pm > *To:* Mailing list for lwIP users <lwip-users@nongnu.org> > *Subject:* Re: [lwip-users] Sending data more than 1472 bytes using UDP > > > > I reckon that maybe it is useful to send my code: > > uint32_t aa[4001]; > > struct pbuf* GK_pbuf; > > err_t GK_err; > > int main(){ > > HAL_Init(); > SystemClock_Config(); > MX_GPIO_Init(); > MX_LWIP_Init(); > udp_echoserver_init(); > for(i = 0; i <= 4000; ++i){ > aa[i] = (i % 30) + 0x30; > } > GK_pbuf = pbuf_alloc(PBUF_TRANSPORT, 1600, PBUF_RAM); > > while (1) > { > ethernetif_input(&gnetif); > sys_check_timeouts(); > } > > } > > > > > > and in udp_echoserver_init.c file: > > > > void udp_echoserver_init(void) > { > > ip4addr_aton("192.168.1.18", &serverIP); > struct udp_pcb *upcb; > err_t err; > upcb = udp_new(); > if (upcb) > { > err = udp_bind(upcb, &serverIP , 7); > if(err == ERR_OK) > { > udp_recv(upcb, udp_echoserver_receive_callback, NULL); > } > } > } > > > > > > void udp_echoserver_receive_callback(void *arg, struct udp_pcb *upcb, > struct pbuf *p, const ip_addr_t *addr, u16_t port) > { > udp_connect(upcb, addr, port); > ip4addr_aton("192.168.1.88", &remoteIP); > for(iii = 0; iii <= 9; ++iii){ > GH_err = pbuf_take(GK_pbuf, aa + (iii * 1472), 1472); > Gn_err = udp_sendto(upcb, GK_pbuf, &remoteIP, 7); > > // Gn_err = udp_send(upcb, GK_pbuf); > HAL_Delay(50); //50ms > } > udp_disconnect(upcb); > pbuf_free(p); > } > > > > On Tue, Oct 6, 2020 at 3:32 PM Mohammad Tavakoli <tavakoli.i...@gmail.com> > wrote: > > Thank you for your answer. What do you mean by lwIP interrupt? where I can > find it? I am also willing to know I should use udp_send() or udp_sendto() > in that ISR. > > > > On Tue, Oct 6, 2020 at 3:11 PM Jon Bean <jb...@beandigital.co.uk> wrote: > > Hi Mohammad > > I had to do something similar on a TI MCU. I chose to send multiple > packets that were less than the MTU. Basically I called the transmit route > from the LWIP interrupt. Each time the interrupt was called it would send a > data packet that was not more than the MTU. I had some flags to know if I > still needed to keep sending data or if I can stop. This seemed to work OK > for my application. > > Regards > > Jon > > On 06/10/2020 12:32, Mohammad Tavakoli wrote: > > I made a TCP server on STM32F407 using lwIP version 2.1.2 and it worked > fine. Now for some reasons I need to run a UDP server on the MCU. I tried > and it worked fine for data size below 1472 bytes. Yet the desired data > length is around 16KB to 20KB. > 1. I searched and found that IP_FRAG should be defined 1 to allow send > data over MTU size. It is enabled by default. I read from an email [1] that > IP_FRAG_MAX_MTU should be also changed to a proper value. However I cannot > realize where it is! > 2. Another approach employed by me is to send chopped data whose size are > below 1472 bytes in a for loop but the for loop only executes first time > and the MCU goes stop status. How I must send data in a for loop? > > [1] > http://lwip.100.n7.nabble.com/Sending-a-large-amount-of-data-using-UDP-td35933.html > > > > > _______________________________________________ > > lwip-users mailing list > > lwip-users@nongnu.org > > https://lists.nongnu.org/mailman/listinfo/lwip-users > > > > > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > > Virus-free. www.avast.com > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > > _______________________________________________ > lwip-users mailing list > lwip-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/lwip-users > > _______________________________________________ > lwip-users mailing list > lwip-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/lwip-users
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