Home/jtag

volt.tech Latest Questions

sachinsharma
  • 0
sachinsharma
Asked: July 1, 2023In:
  • 0

Hi everyone, Is it possible to use the USB port for both JTAG and Mass Storage Devices (or CDC)? This can either beIt enumerates as a composite device For the first 10 seconds of booting it’s JTAG, but also switches over to MSD ...Read more

Hi everyone,

Is it possible to use the USB port for both JTAG and Mass Storage Devices (or CDC)?

This can either be

  • It enumerates as a composite device
  • For the first 10 seconds of booting it’s JTAG, but also switches over to MSD if nothing has connected

I’m using the ESP32-S3-Mini and I am using every pin, so I can not use the external JTAG interface.

Thank You

Read less
cdcesp32jtagportusb
  1. nidhi singh

    Hello, Yes, it is possible to use the USB port for both JTAG and Mass Storage Devices (or CDC) on the ESP32-S3-Mini. This can be achieved by configuring the USB device to appear as a composite device, which means that it can present itself to the host as multiple devices at the same time. The firstRead more

    Hello,

    Yes, it is possible to use the USB port for both JTAG and Mass Storage Devices (or CDC) on the ESP32-S3-Mini. This can be achieved by configuring the USB device to appear as a composite device, which means that it can present itself to the host as multiple devices at the same time.

    The first option is impossible, as USB-serial-JTAG (which provides the JTAG connection) and USB-OTG (which can provide the mass storage functionality) can’t be connected to the USB pins at the same time. The second option is viable.

    Thank You

    Nidhi Singh

    See less
    • 0
ashishgawade
  • 0
ashishgawade
Asked: June 8, 2023In:
  • 0

Hi, I designed to use an ESP32- S3 for a project, where many IO pins will be used. I flash the ESP32- S3 with the integrated JTAG over USB. There are some pins, that I am now doubtful if I can use ...Read more

Hi,

I designed to use an ESP32- S3 for a project, where many IO pins will be used. I flash the ESP32- S3 with the integrated JTAG over USB.

There are some pins, that I am now doubtful if I can use for the specific interface( Strapping Pins and RXD0/ TXD0)

– GPIO0-> Here I want to ensure, that at startup the correct sense is applied( 1in my case)
– GPIO3-> Need floating at startup, so I’ll not use this GPIO
– GPIO45/46-> Need to ensure a sense 0 at startup

So, that should fit so far. But what about RXD0 and TXD0? Can I apply them as I2C with Pull- Ups or are there any restrictions?

Thank You

Read less
esp32gpio0gpio3gpio45iosjtagusb
  1. ellasmith

    Hello, Yes. Be apprehensive that typically there will be some launch chatter on TxD0- if you are applying this pin for I2C and the different column stays idle, this is doubtful to make an issue, however, (similarly note that depending on the module/board, TxD0 may have a built-in 500-ohm series resiRead more

    Hello,

    Yes. Be apprehensive that typically there will be some launch chatter on TxD0– if you are applying this pin for I2C and the different column stays idle, this is doubtful to make an issue, however, (similarly note that depending on the module/board, TxD0 may have a built-in 500-ohm series resistor. It likely will not interfere too important with I2C, but if you are having issues streaming I2C at a high bitrate, it may be because the resistor limits the slew rate.)

    Thank You

    See less
    • 0
Alex thomas
  • 0
Alex thomas
Asked: March 29, 2023In:
  • 0

Hello, I am designing a PCB that’s using the built-in serial/JTAG controller and OTG peripheral of the ESP32-S3. It can not hold a physical boot or reset buttons. It has a USB-C container with the D/D- lines connected to GPIO20 and ...Read more

Hello,

I am designing a PCB that’s using the built-in serial/JTAG controller and OTG peripheral of the ESP32-S3. It can not hold a physical boot or reset buttons. It has a USB-C container with the D/D- lines connected to GPIO20 and GPIO19, respectively.

Are there any ways of going without buttons for reset or is an external USB to UART IC needed?

For boot mode choosing I exactly hold a jumper that when shorted pulls GPIO0 to GND, is there a better way to do that without a button?

Any help is appreciated.

Thank You

Read less
bootcontrollersesp32firmwaregpio19GPIO20internaljtagpcbserial
  1. ashishgawade

    Hello, The USB-serial-JTAG port can usually reset/put the chip into boot mode without any external components. It's still advised to have some way to pull IO0 low for initial programming and during development, if you make a mistake where e.g. your program disables the USB function. A jumper will peRead more

    Hello,

    The USB-serial-JTAG port can usually reset/put the chip into boot mode without any external components. It’s still advised to have some way to pull IO0 low for initial programming and during development, if you make a mistake where e.g. your program disables the USB function. A jumper will perform that function just fine.

    Thank You

    Ashish

     

    See less
    • 0
nidhi singh
  • 0
nidhi singh
Asked: December 19, 2022In:
  • 0

Hello and thanks in advance for the help. I recently entered my ESP32- C3 mini development kit. I’m sure it’s configured to use the CP2102 USB interface, so R1 and R4 are installed. I want to use the internal USB JTAG ...Read more

Hello and thanks in advance for the help.

I recently entered my ESP32- C3 mini development kit. I’m sure it’s configured to use the CP2102 USB interface, so R1 and R4 are installed. I want to use the internal USB JTAG interface which I understand requires the removal of R1 and R4 and the installation of R2 and R3( though I’m not sure this is the case). This would also free up RXD and TXD, which I need to use.

I haven’t been suitable to find documentation on how to use the Devkits with the USB JTAG, nor have I been suitable to determine the position of R1, R2, R3, and R4. I’ve tried” beeping out” the circuit but would prefer not to ruin my board.

Is there any guidance as to where those components are and/ or how to use a USB JTAG?

Read less
c3minidevkitesp32jtagusb
  1. Alex thomas

    The PCB layout of that dev board can be found then. As far as I can see, you need to rotate those resistors 90 degrees to move them from the red to the green position in this image: You probably also want to disconnect the RxD/TxD pins from the CP2104 to the ESP32C3 if you want to use those pins. YoRead more

    The PCB layout of that dev board can be found then. As far as I can see, you need to rotate those resistors 90 degrees to move them from the red to the green position in this image:

    You probably also want to disconnect the RxD/TxD pins from the CP2104 to the ESP32C3 if you want to use those pins. You can do that by removing R21/R22, I marked those in blue.

    The built-in USB thing should more or less work as an extra UART inside the ESP32C3 and as a general CDC- ACM serial port(=no drivers needed) on the PC side. You do need to use the latest master of ESP-IDF to get full support for it, and if you specifically want to select the device as your press output UART in menuconfig, else, your debug messages will go to UART0.

    On the JTAG side, just useesp_usb_jtag. cfg as your JTAG adapter, config file in OpenOCD and you should be good.
    Still, feel free to post it here, If you need any further help. Support for the built-in USB-to-JTAG thing on the C3 is enough new, so I’d be interested in seeing how you fare with it.

    See less
    • 0
vikas Nagpal
  • 0
vikas Nagpal
Asked: September 10, 2022In:
  • 0

Maybe here in the ADF forum are some Lyra- T users. I’ve a Lyra- T( using WROVER- B) and I’m trying to get JTAG debugging working on Windows. I’ve tried both VSCODE ane decline. Both detect the chip via JTAG, but ...Read more

Maybe here in the ADF forum are some Lyra- T users.

I’ve a Lyra- T( using WROVER- B) and I’m trying to get JTAG debugging working on Windows. I’ve tried both VSCODE ane decline. Both detect the chip via JTAG, but I do not get any step further.
Anyone here having more success, or even can confirm it must be possible with the Lyra- T?

Read less
esp32espressifjtaglyra-t
  1. nidhi singh

    The JTAG debugging issues I was having when using VSCode, ESP-IDF Extension, and ESP-PROG *may* have been caused by the ESP-OpenOCD v0.11.0-esp32-20220411. When I replaced it with ESP-OpenOCD v0.11.0-esp32-20220706, I was able to flash via JTAG and Start/Stop debug session without seeing any errors.

    The JTAG debugging issues I was having when using VSCode, ESP-IDF Extension, and ESP-PROG *may* have been caused by the ESP-OpenOCD v0.11.0-esp32-20220411. When I replaced it with ESP-OpenOCD v0.11.0-esp32-20220706, I was able to flash via JTAG and Start/Stop debug session without seeing any errors.
    See less
    • 0
dev krishnan
  • 0
dev krishnan
Asked: June 13, 2022In:
  • 0

While using Renesas R7FA6E10F2CFP with an E2/E2-lite programmer and JTAG programming interface. I am programming through E2 studio. As it stands I can not establish communication with the MCU. Every time I try to program the device I get the ...Read more

While using Renesas R7FA6E10F2CFP with an E2/E2-lite programmer and JTAG programming interface. I am programming through E2 studio. As it stands I can not establish communication with the MCU. Every time I try to program the device I get the following errors:
Error 0x0003080A: The specified emulator has already been used.

Error 0x0003080E: External power is supplied to the user system.

I have verified connectivity from the MCU and the programming connector pins.

Read less
connector pinse2 programmere2 studiojtagmcurenesas r7fa6e10f2cfp
  1. pallavi sharma

    Are you using a Renesas reference design, or is this custom hardware?  Have you checked your connection with the document E2 Emulator, E2 Emulator Lite Additional Document for User's Manual (Notes on Connection of RA Devices)? Which tool are you using - E2 or E2-lite?  This matters, because the E2 sRead more

    Are you using a Renesas reference design, or is this custom hardware?  Have you checked your connection with the document E2 Emulator, E2 Emulator Lite Additional Document for User’s Manual (Notes on Connection of RA Devices)?

    Which tool are you using – E2 or E2-lite?  This matters, because the E2 supports both JTAG & SWD while E2-Lite only supports SWD.  From On-chip Debuggers Performance Property:

      

    See less
    • 0