Hi Vsurducan, I did a test on the PIC18F2550 using the standard JAL serial sample library program. That program uses these pragma's:
pragma target clock 20_000_000 pragma target OSC hs pragma target LVP enabled -- allow LVP pragma target WDT CONTROL -- WDT software controlled WDTCON_SWDTEN = OFF -- disable WDT It did not work, since my computer never recognized the PIC as COM port so I changed it to this: pragma target clock 48_000_000 -- oscillator frequency pragma target OSC HS_PLL -- HS osc + PLL pragma target PLLDIV P5 -- 20 MHz pragma target CPUDIV P1 -- Fosc divisor pragma target USBDIV P2 -- USB clock selection pragma target WDT CONTROL -- watchdog pragma target XINST DISABLED -- do not use extended instructionset pragma target DEBUG DISABLED -- no debugging pragma target BROWNOUT DISABLED -- no brownout reset pragma target FCMEN DISABLED -- no clock monitoring pragma target IESO DISABLED -- no int/ext osc switching pragma target VREGEN ENABLED -- voltage regulator used pragma target LVP ENABLED -- low voltage programming pragma target MCLR EXTERNAL -- external reset WDTCON_SWDTEN = OFF -- disable WDT OSCCON_SCS = 0 -- select primary oscillator This worked, my computer recognized the PIC as COM7 on my computer. I then added a counter in the loop and had sent its value every 50 ms to the output. It sometimes stopped after a count of 300 (note that I made the 50 ms NOT using usec_delay since then the USB driver would not work). If you would enter characters when it stopped it did no longer reply them. I then tried the same using the interrupt based version that I am currently working on (now I could use usec_delay in the main loop). That seemed to work better - while typing this the counter is at 17.000 and still counting - but also there it happend at least once that it stopped but I am not sure if that was because I was also entering a lot of character on the keyboard. This requires some further investigation. I did not yet try this on another PIC but I will do that later. I do not know which pragma's you are using but the pragma's given in the standard sample program for the PIC18f2550 do not work. Kind regards, Rob ________________________________ Van: [email protected] <[email protected]> namens Rob CJ <[email protected]> Verzonden: zondag 28 februari 2021 16:54 Aan: [email protected] <[email protected]> Onderwerp: Re: [jallib] WIN32CDCDrivers? Hi Vsurducan, Ok I will test the sample program on the same PIC you are using to see if it is related to the PIC. Met vriendelijke groet, Rob Jansen ________________________________ From: [email protected] <[email protected]> on behalf of vsurducan <[email protected]> Sent: Sunday, February 28, 2021 4:34:47 PM To: [email protected] <[email protected]> Subject: Re: [jallib] WIN32CDCDrivers? Hi Rob, thx, Unfortunately you are right, the cleaned library behaves as the old one. I have no ADC running yet. :) I'm just trying to send a bunch of chars from the PIC to the host in a predictive way with no success. USB serial communication runs only if I receive a char and send a data on each received char, and even in this situation it freezes after a number of chars sent. PIC18F25k50 runs exactly the same at 5V (3.3V on VUSB), just for the record. On Sun, Feb 28, 2021 at 4:30 PM Rob CJ <[email protected]<mailto:[email protected]>> wrote: Hi Vsurducan, The updated USB will not solve your problem, it was only cleaned up but not functionally changed. What might be an issue is the conversion time of the ADC. Your call adc_read(0) is a blocking call since it waits until the ADC conversion is complete. This may - not sure - be too long for the usb_serial_flush(). If that is the problem then there are - at least - two options: -) Start the AD conversion yourself and check if conversion is still ongoing by checking ADCON0_GO. If so skip the reading part until conversion is complete and then read the ADC value. -) Use an interrupt based version of the USB driver. I re-started working on that today and it seems to work for USB serial (tested with a PIC16F1455 and PIC18F14K50) since then you no longer need the usb_serial_flush() because the handling of the USB driver is done in the interrupt routine. As said I am not yet done with the update of the USB interrrupt based driver but as soon as it works I will upload it. For now you could try the other option by checking if conversion is ongoing. With the interrupt based USB driver my main usb_serial sample program now looks like this: const USB_INTERRUPT_DRIVEN = TRUE -- This needs to be set to use the interrupt driven mode forever loop -- There is no serial flush anymore 🙂 -- check if USB device has been configured by the HOST if ( usb_cdc_line_status() != 0x00 ) then if !has_shown_welcome_msg then has_shown_welcome_msg = true print_string( usb_serial_data, str_welcome ) end if else has_shown_welcome_msg = false end if -- check for input character if usb_serial_read( ch ) then -- echo input character usb_serial_data = ch end if end loop Kind regards, Rob ________________________________ Van: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> namens vsurducan <[email protected]<mailto:[email protected]>> Verzonden: zondag 28 februari 2021 10:37 Aan: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Onderwerp: Re: [jallib] WIN32CDCDrivers? On Sun, Feb 28, 2021 at 10:04 AM Rob CJ <[email protected]<mailto:[email protected]>> wrote: Hi Vsurducan, To understand this better. The program you mention does not work for that PIC running at 3.3 Volt, right? I have 2 questions: 1) Have you tried what happens when running it at 5 Volt? No because it has to work on 3.3V. However I will try it to see if it makes things different. 2) What did you do with the 3.3 Volt generated by the PIC for the USB? I can imagine that it cannot generate that Voltage if it is powered by 3.3. Volt. It's within specifications Rob. 3.3V on VDD, 3.1V on VUSB. Tio understand better, I'm a hardware guy working in electronics from 35years now. However, software is still not my favorite thing... For your information. Some years ago I updated the USB driver to make it suitable for a PIC16F1455 but due to a compiler bug I had to implement a workaround to get that working. This compiler bug was fixed some time ago so I removed all these workarounds and uploaded the 'clean' USB library again to GitHub yesterday. Oki, I will test it thank you. Currently I am looking at making the USB driver operate on an interrupt basis as to get rid of the need for flushing it. So if there are any other problems with the driver I can have a look but I have to understand your application. I general if you have a problem, try to minimize the code to the essentials so that it becomes more easy to analyze the issue. It's the minimum possible: the example "18F4450_usb_serial.jal" has been adapted for PIC18F25K50. The only thing which works from this example is the part below: forever loop -- poll the usb ISR function on a regular base, in order to -- serve the USB requests usb_serial_flush() -- check for input character if usb_serial_read( ch ) then -- echo input character usb_serial_data = ch end if end loop Thanks. Kind regards, Rob ________________________________ Van: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> namens vsurducan <[email protected]<mailto:[email protected]>> Verzonden: zondag 28 februari 2021 07:43 Aan: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Onderwerp: Re: [jallib] WIN32CDCDrivers? Hi Rob, Nope, with PIC18F25K50 at 3.3V supply nothing workswith usb_serial library except the echo part which is useless for me. Anything else is closing the USB host port and device is seen as unknown. About delay, please take a look at one good example of funlw65 (below) where it has about 1 second delay by flushing in the meantime. However this example is not relevant for using only the usb_serial because it uses the bootloader with different fuses configuration and different location for the code which runs. On PIC18F2550 at 5V supply and external HOSC, the actual USB library does not send data reliably as an FT232 would do, an amount of data from ADC for example would be sent to the terminal with variable speed even if the main loop has very simple structure with fixed computing time. Sometimes the transmission stops, to resuscitate it, the port has to be closed and opened again on the host side... I do not know why this happens, the library is too twisted for my taste so perhaps I will modify it if I'll have nerves for that... -- Project: ADC read and send on USB CDC -- Author: Vasile Guta-Ciucur (funlw65) -- License: Code released under New BSD license -- For jallib libraries, see de licence inside jal.zip include freejalduino4 -- FreeJALduino4 pinout layer for the last board model -- include libraries include usb_serial include print include format include delay var dword Value var word AD_RESULT var word Volts -- var byte Millivolts const byte str1[] = " Volts\n\r" -- ================================================== -- PROGRAM START ------------------------------------ -- ================================================== -- configure pins enable_digital_io() -- first, all pins set to digital -- now configure ADC constants const bit ADC_HIGH_RESOLUTION = true -- 10bit resolution const byte ADC_NVREF = 0 -- no voltage reference const byte ADC_NCHANNEL = 1 -- how many ADC channels we are using, -- always starting the count from A0 (RA0/AN0) -- This will automatically set A0 as analog input const word ADC_RSOURCE = 909 -- impendance (R1*R2/(R1+R2)) -- then, load the ADC library include adc -- Initialize ADC adc_init() -- initialize the USB serial library usb_serial_init() -- start main loop forever loop usb_serial_flush() AD_RESULT = adc_read(0) print_word_dec(usb_serial_data, AD_RESULT) usb_serial_data = " " -- Value = 537 * AD_RESULT Value = dword(537) * AD_RESULT -- one of the operands must be casted -- as dword to have a 32bit integer math -- because AD_RESULT is word and the other -- operand is a generic one. Volts = Value / 100 format_word_dec(usb_serial_data, Volts, 4, 2) print_string(usb_serial_data, str1) for 100 loop -- delay 1 second (a little more than) usb_serial_flush() delay_1ms(10) end loop end loop -- On Sat, Feb 27, 2021 at 9:03 AM Rob CJ <[email protected]<mailto:[email protected]>> wrote: Hi Vsurducan, Did you fix this issue? So far I never had issues with the USB driver but I had always used it with a crystal. Why are you using udc_cdc_putc()? About your other post about the USB driver. I saw that you used a delay of 400 ms in your main program. This may not work since the USB driver needs to be polled by usb_serial_flush() and this needs to be done quite frequently (I thought miliseconds). I already found this polling a bit anoying myself since it would be nicer to have it done on an interrupt basis. Some time ago I started to make it interrupt driven but it did not work immediately at that time. Maybe it is a good time to pick it up again. Kind regards, Rob ________________________________ Van: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> namens vsurducan <[email protected]<mailto:[email protected]>> Verzonden: woensdag 24 februari 2021 20:33 Aan: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Onderwerp: Re: [jallib] WIN32CDCDrivers? Thank you Matt and Rob, I have a non reliable USB communication under both Win10 and Win7 so I'm suspecting everything... The following sample is based on 18F4550_USB_serial.jal. PIC18F25K50 has the same registers as PIC18F2550 except some PLL bits which can be ignored with a delay. However, USB works only with the echo. Trying to repeatedly send a byte from PIC to PC, communication it froze. include 18f25k50 -- target PICmicro -- -- This program assumes that a 16 MHz resonator or crystal -- is connected to pins OSC1 and OSC2. pragma target clock 48_000_000 -- oscillator frequency -- pragma target OSC HSH -- crystal or resonator pragma target PLLSEL PLL3X pragma target PLLEN ENABLED -- PLL on pragma target CPUDIV P1 -- Fosc divisor pragma target WDT DISABLED -- watchdog pragma target XINST DISABLED -- do not use extended instructionset pragma target DEBUG DISABLED -- no debugging pragma target BROWNOUT DISABLED -- no brownout reset pragma target FCMEN DISABLED -- no clock monitoring pragma target IESO DISABLED -- no int/ext osc switching pragma target LVP DISABLED -- low voltage programming pragma target MCLR EXTERNAL -- external reset -- -- The configuration bit settings above are only a selection, sufficient -- for this program. Other programs may need more or different settings. -- OSCCON_SCS = 0 -- select primary oscillator -- enable_digital_io() -- make all pins digital I/O WDTCON_SWDTEN = OFF -- disable watchdog include delay include usb_serial include print -- constants const byte str_welcome[] = "JALLIB USB Serial Demo app\n" -- variables -- interrupts? No thanks INTCON_GIE = false -- setup the USB serial library usb_serial_init() var bit has_shown_welcome_msg = true var byte ch -- main loop forever loop -- poll the usb ISR function on a regular base, in order to -- serve the USB requests usb_serial_flush() -- check if USB device has been configured by the HOST if ( usb_cdc_line_status() != 0x00 ) then if !has_shown_welcome_msg then has_shown_welcome_msg = true print_string( usb_serial_data, str_welcome ) end if else has_shown_welcome_msg = false end if -- check for input character ; this works if usb_serial_read( ch ) then -- echo input character usb_serial_data = ch end if ; none of the following works, the USB is frozen... ; usb_cdc_putc ("B") ; format_word_dec(usb_serial_data, 0x3FC , 4, 0) ; print_byte_dec(usb_serial_data, 0x04) On Wed, Feb 24, 2021 at 9:02 PM Matt Schinkel <[email protected]<mailto:[email protected]>> wrote: Hi, it is in jallib under tools/usb Sent from my Android device. ________________________________ From: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> on behalf of Rob CJ <[email protected]<mailto:[email protected]>> Sent: Wednesday, February 24, 2021 1:41:57 PM To: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Subject: Re: [jallib] WIN32CDCDrivers? Hi Vsurducan, I do not know but I think you do not need them. When I updated the serial library some time ago I could test it with a JAL sample program. Windows 10 recognized the usb device without the need for driver. If you use an older version of Windows I do not know if this is also true. Kind regards, Rob ________________________________ Van: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> namens vsurducan <[email protected]<mailto:[email protected]>> Verzonden: woensdag 24 februari 2021 19:17 Aan: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Onderwerp: [jallib] WIN32CDCDrivers? Hi, where can I find a copy of the Win32CDCDrivers.zip ? The links posted in the usb_serial_demo are broken. thanks, -- You received this message because you are subscribed to the Google Groups "jallib" group. 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