De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) - De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi, I need to communicate between de10 and esp8266 to send data to the cloud, but first I need to connect these 2 kits base on project GHRD. I see they can connect with each other by IP uart rs232 and I can do the steps: build qsys => modify file top.v =>run quartus=>generate file hex. And now i need code use hps control it send data, example send "abcde" to tx port with baund rate 9600 or 115200. But i don't know how to do it ?. So I really need your help. I attached 3 pictures I made .Thank you very much. QSYS add external port for uart rs232 file hex contain rs232_0_base Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi, Small clarification i uesd "strcpy(p, c)" to copy the string. Thanks! Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hello! Hope you are doing well, need your help with the following issue! Description: What i am trying to test out receiving and transmitting with the code i have made the qsys design programmed it wrote the c code, etc. everything works fine as soon as i change the main() to take the data i.e., RX and copy it to char array of TX to write it back on the screen in this case putty it doesn't work idk why. Can you please help me this! Thank you very much! Code: #include <stdio.h> #include <string.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <sys/types.h> #include <sys/ipc.h> #include <sys/shm.h> #include <sys/mman.h> #include <sys/time.h> #include "ARM_A9_HPS.h" #include <string.h> //lw bus; uart #define HW_REGS_BASE 0xff200000 #define HW_REGS_SPAN 0x00001000 #define HW_REGS_MASK ( HW_REGS_SPAN - 1 ) void uart_putc(char c ,unsigned long *h2p_lw_uart_addr) { unsigned short uart_status; do { uart_status = *(h2p_lw_uart_addr + 2); }while(!(uart_status & 0x40)); *(h2p_lw_uart_addr + 1) = c; } void uart_printf(char *str ,unsigned long *h2p_lw_uart_addr) { while(*str != '\0') { uart_putc(*str ,h2p_lw_uart_addr); str++; } } int uart_getc(unsigned long *h2p_lw_uart_addr) { unsigned short uart_status; do { uart_status = *(h2p_lw_uart_addr + 2); } while (!(uart_status & 0x80)); return *(h2p_lw_uart_addr + 0); } int uart_scanf(char *p,unsigned long *h2p_lw_uart_addr) { int cnt = 0; while (1) { *p = uart_getc(h2p_lw_uart_addr); cnt++; if (*p == '\n' || *p == '\r') return cnt; else p++; } } // /dev/mem file id int fd; int main() { void *virtual_base; int i; unsigned long *h2p_lw_uart_addr; // === get FPGA addresses ================== // Open /dev/mem if( ( fd = open( "/dev/mem", ( O_RDWR | O_SYNC ) ) ) == -1 ) { printf( "ERROR: could not open \"/dev/mem\"...\n" ); return( 1 ); } //============================================ // get virtual addr that maps to physical // for light weight AXI bus virtual_base = mmap( NULL, HW_REGS_SPAN, ( PROT_READ | PROT_WRITE ), MAP_SHARED, fd, HW_REGS_BASE ); if( virtual_base == MAP_FAILED ) { printf( "ERROR: mmap() failed...\n" ); close( fd ); return( 1 ); } h2p_lw_uart_addr=(unsigned long*) (virtual_base);//uart *(h2p_lw_uart_addr + 4) = (int) ((UART_0_FREQ / UART_0_BAUD)-1) ; char c[20]="Transmitting"; char p[20] = ""; while( 1 ) { uart_scanf(&p[0],h2p_lw_uart_addr); usleep(100*1000); p = c; uart_printf(&c[0],h2p_lw_uart_addr); usleep( 100*1000 ); } } As just TX works fine (from board) i think qsys implementation is correct and simple too. Thanks, Tarun_rai Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Allen Thank you so much for the waveform! I will be checking with the engineering team on this. I notice that the Quartus version that you are using is quite old. There could be a possible chance that this have been fix in the newer version of the Quartus. I tried out recently using the Quartus 22.1 and able to send and receive serial successfully. Since this thread been resolve, I shall set this thread to close pending. If you still need further assistance, you are welcome reopen this thread within 20days or open a new thread, some one will be right with you. Please login to ‘ https://supporttickets.intel.com’ , view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions. If you happened to close this thread you might receive a survey. If you think you would rank your support experience less than 10 out of 10, please allow me to correct it before closing or if the problem can’t be corrected, please let me know the cause so that I may improve your future service experience. Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Jingyang, Teh I send you some waveforms corresponding to some cases. 1. configure set fixed baudrate 9600 in qsys: waveform correct with data "57" but baudrate is not correct (a) waveform correct with data "57" but baudrate is not correct (b) 2. uncheck set fixed baudrate in qsys: when i set clock = 50M and divisor = 7400 then it correct all. waveform when i set divisor = 7400 I hope with the information I provided you can find the source of the error. Regards Alen (Phan Quang Ky) Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Alen Did you manage to get the waveform for the uart baud rate? Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Alen Thanks for the sharing. Hope to hear from you regarding the waveform. Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi JingyangTeh, Please wait a few weeks, I have some reports to report once completed, I will send them to you. Regards, Alen Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Allen Any update on this case? It would be great if you could share me a screenshot of the waveform captured. Thanks in advance! Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Alen Glad that you are able to get your project working. Could you please share the wave form that you have and a screenshot of the settings that you done in the IP? What version of the quartus that you are using currently? I will raise this up to the engineering team to investigate this issue further as this is not an expected behaviour. Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi JingyangTeh, When I found the error, I felt strange. When I set baudrate = 9600, the real baudrate is 12500 (time per bit is 80us). And I used oscilloscope to measure and detect that. Regards, Alen (Phan Quang Kỳ) Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Alen That is weird that the baudrate are different from set. How much difference was it? How did you correct the difference? Regards JIngyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) hi JingyangTeh, Thank you so much for your support. I succeeded in this application. The problem : the baudrate of IP in the manual is not true to reality. regards, alen Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Allen Do you have a scope available to measure the signals coming out from the pins? Do you have the specification for the USB transceiver that you are using? What operating signal logic it is able to capture? The signals coming out from the GPIO are 3.3Vs. Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) hi,I have tried using putty but it's not correct. putty putty terminal Tomorrow, I will try with configure some parameters : not "fixed baud rate" or "baud =9600". sometime, I think With clock 50M and baud 115200 maybe make larger speed error. regards, Alen Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Alen Have you tried using a different tool that supports setting stop bit? There are a few that I have used before: Teraterm & putty. Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Allen For the baud rate settings, you do not need to write to the divisor register as you have selected "Fixed Baudrate" in the IP Configuration. Writing to the divisor register as no effect. Gone through the code that you shared, it looks fine with all the condition checking before sending. One thing I can think of is the stop bit settings. The tool that you are using to write and read from the UART does not have a settings to set the Stop bits. Could you try with another tool such as Putty? In putty there is a Stop bits settings, with that set the Stop bit to 1 same as the IP configuration. Regards Jingyang,Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Jingyang, Teh , You can get project GHRD at link I was upload: https://drive.google.com/file/d/1Bse1dQUNYEjjC0GkylL1VpXxlSVzFtoI/view?usp=sharing Thanks, Alen1214 Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi, I added more about the implementation step: Connect hardware I have looked for examples of uart of this IP but there are very few examples and only got 1 example made with the GHRD project from this links: 1. https://blog.csdn.net/weixin_43649647/article/details/121069892 2. Page 140 to page 155: https://www.intel.com/programmable/technical-pdfs/683130.pdf 3. Project example for Nios (but I must use with GHRD): https://www.intel.com/content/www/us/en/design-example/715139/cyclone-v-uart-rs-232-maximum-baud-rate-reference-design.html?wapkw=uart Also, I think this problem may be caused by asynchronous transfer speed (baundrate) of the two devices or another error? But I don't know how to fit it. please help me to fix this error of wrong data transmission. Thanks, Alen1214 Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Jingyang, Teh, I have transferred data from de10 out of uart pin successfully. But the data retransmitted was wrong when I could transmit the data string data "PLEASE" received as "Ó", received "1234" as "Ê". The device I use to receive is a UArt to usb module (CP2102). I do the following step by step: 1. Connect hardware: Connect hardware (1) Connect hardware (2) data received from CP2102 displayed on hercules terminal 2. Add ip into GHRD project Qsys connection configure IP uart address map (1) address map (2) address map (3) 3.Assignments pin File top.v(1) File top.v(2) Assignments pin (GPIO 6 - RX, GPIO7-TX) 4. File hex use for code C Define for IP UART 5. FILE CODE C: admin, please help me check carefully the C code that has set baudrate and especially send the data, is it correct? #include <stdio.h> #include <unistd.h> #include <fcntl.h> #include <sys/mman.h> #include "hwlib.h" #include "socal/socal.h" #include "socal/hps.h" #include "socal/alt_gpio.h" #include "hps_0.h" #include <string.h> #define HW_REGS_BASE ( ALT_STM_OFST ) #define HW_REGS_SPAN ( 0x04000000 ) #define HW_REGS_MASK ( HW_REGS_SPAN - 1 ) void uart_putc(char c ,unsigned long *h2p_lw_uart_addr) { unsigned short uart_status; do{ uart_status = *(h2p_lw_uart_addr + 2); }while(!(uart_status & 0x40)); *(h2p_lw_uart_addr + 1) = c; } void uart_printf(char *str ,unsigned long *h2p_lw_uart_addr) { while(*str != '\0') { uart_putc(*str ,h2p_lw_uart_addr); str++; } } int uart_getc(unsigned long *h2p_lw_uart_addr) { unsigned short uart_status; do { uart_status = *(h2p_lw_uart_addr + 2); } while (!(uart_status & 0x80)); return *(h2p_lw_uart_addr + 0); } int uart_scanf(char *p,unsigned long *h2p_lw_uart_addr) { int cnt = 0; while (1) { *p = uart_getc(h2p_lw_uart_addr); cnt++; if (*p == '\n') return cnt; else p++; } } int main() { void *virtual_base; int fd; int i; unsigned long *h2p_lw_uart_addr; // map the address space for the LED registers into user space so we can interact with them. // we'll actually map in the entire CSR span of the HPS since we want to access various registers within that span if( ( fd = open( "/dev/mem", ( O_RDWR | O_SYNC ) ) ) == -1 ) { printf( "ERROR: could not open \"/dev/mem\"...\n" ); return( 1 ); } virtual_base = mmap( NULL, HW_REGS_SPAN, ( PROT_READ | PROT_WRITE ), MAP_SHARED, fd, HW_REGS_BASE ); if( virtual_base == MAP_FAILED ) { printf( "ERROR: mmap() failed...\n" ); close( fd ); return( 1 ); } h2p_lw_uart_addr=(unsigned long*) (virtual_base + ( ( unsigned long )( ALT_LWFPGASLVS_OFST + UART_0_BASE ) & ( unsigned long)( HW_REGS_MASK ) ));//uart //h2p_lw_uart_addr=(unsigned long *)(virtual_base + ( ( unsigned long )( ALT_LWFPGASLVS_OFST + UART_0_BASE ) & ( unsigned long)( HW_REGS_MASK )));//uart // toggle the LEDs a bit *(h2p_lw_uart_addr + 4) = (int) ((UART_0_FREQ / UART_0_BAUD)-1) ; //*(h2p_lw_uart_addr + 4) = (int) ((UART_0_FREQ / UART_0_BAUD)+1) ; I tried but not correct //*(h2p_lw_uart_addr + 4) = (int) (UART_0_FREQ / UART_0_BAUD + 0.5); I tried but not correct char c[20]="PLEASE"; while( 1 ) { // control led // wait 100ms uart_printf(&c[0],h2p_lw_uart_addr); usleep( 100*1000 ); } // while // clean up our memory mapping and exit if( munmap( virtual_base, HW_REGS_SPAN ) != 0 ) { printf( "ERROR: munmap() failed...\n" ); close( fd ); return( 1 ); } close( fd ); return( 0 ); } ------------------------------------------- Thank you very much Jingyang . I hope you have amazing day. Regards, Alen1214. Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Alen1214 From the address map I see that UART IP is connected to the light-weight F2H and an offset of 0x7000. The LWF2H start address is 0xFF200000. Could you try accessing the address 0xFF207000 as your h2p_lw_uart_addr? Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Thank a lot Jingyang, Teh. when running the core on the HPS, I has no error and in terminal has a long string "hello hello ...." but ESP8266 is not getting any character. Then I share with you some screenshot of your Address Map in Qsys Address map in Qsys (1) Address map in Qsys (2) Address map in Qsys (3) I will print out the exact address value of h2p_lw_uart_addr as soon as I can. And I hope you check for me with some information I provided. I thank you very much for your help and I hope you have amazing date!!! Regards, Alen1214 Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Hi Alen1214 What error are you experiencing when running the code on the HPS? Can you please share the run logs for the code in the HPS. Could you share a screenshot of your Address Map in Qsys? I think it could be related to the address value that you set for the uart. Could you print out what is the exact value of h2p_lw_uart_addr? Regards Jingyang, Teh Replies: Re: De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port) Sorry i had a important update with all image. You will follow new image i update and I don't know why my code is like this but esp8266 doesn't receive data? You help me check it. Thank you very much for your help. QSYS add external port for uart rs232 serial port code rx for esp8266 (1) code rx for esp8266 (2) file hex contain UART_0_BASE code tx for de10 (1) code tx for de10(2) code tx for de10 (3)