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EXA-PROG 

USB programming adapter for AVR-ISP, AVR-UPDI, STM32, LPC, ESP8266, ESP32 

 

 

Page 2 

 

 

 

INSTALLATION 

Connect the EXA-PROG via a mini USB cable with any USB-2.x or USB 3.x port of your PC or laptop.  
 

Windows 7 and 8.x 

EXA-PROG uses a virtual COM port. With Windows 7 and 8.x the driver file needs to be installed first. Click on the respective 
entry in the device manager of Windows, in the "Driver" tab click on "update driver". Then select the file 

prog-isp.inf

 of the 

EXA-PROG program package. 

Windows 8.x 

If you are still using Windows 8.x you may have to disable 

“driver signature enforcement”. You can easily find out how this 

works with a Google search. If possible, you should consider going for Windows 10 or 11. 

Windows 10/11 

With Windows 10 or 11 there is no driver installation necessary. Each component registers itself as a 

“serial USB device 

(COMx)“.  

The best way to test which COM port is valid for your used component is by starting the EXA-PROG tool and clicking on 
the list of COM ports before and after you plugged in the component. The COM port that was added is your EXA-PROG. 

EXA-PROG 

doesn’t come with its own program for programming microcontrollers. EXA-PROG’s firmware is compatible to 

many existing programming tools of the manufacturers or to freely available tools. 

In its delivery condition EXA-PROG is set to the mode AVR-ISP with 3.3V (all DIP switches to OFF). 

In the AVR-ISP mode EXA-PROG is compatible to 

STK500

 and works with AVR/ATMEL/MICROCHIP Studio as well as 

AVRDUDE (Arduino, Bascom).  

  Notice: With Windows 10 or 11 please only use ATMEL/MICROCHIP Studio 7.x or higher. Older versions do not work. 

In the UPDI mode EXA-PROG emulates a 

JTAG2UPDI

 programmer. At the moment this can only be used with 

AVRDUDE

 

(see link at the end of this manual). 

The ESP mode is compatible to 

ESPTOOL

 (esptool.py, esptool.exe). 

The programming modes STM32 and NXP/LPC are largely intended for the use of individual programming tools.  

Please always pay attention that the DIP switches are set fitting to the microcontroller that is to be programmed. Please be 
sure  to  pay  attention  of  the  programming  voltage.  AVR  controllers  can  be  operated  with  3.3V  and  5V.  Almost  all  32-bit 
microcontrollers can ONLY be operated with 3.3V. 

Do not flip the DIP switches throughout the programming process. Switching always leads to a reset of the programmer. 
This is indicated by a short flicker of the red LED. A constantly glowing green LED indicates that the programmer is ready 
for use. 

Do not push the RESET button throughout the programming process. The programming gets canceled and the data in the 
flash memory of the microcontroller can be invalid.  

 

 

Summary of Contents for EXA-PROG

Page 1: ...ate adjustment in the AVR ISP mode Clock generator for AVR controller with wrong fused oscillator Button for reset of the connected microcontroller 10 pin standard ISP port Optional equipment 10 pin to 6 pin adapter ESP01 adapter Mini USB port for power supply and connection to PC Firmware updateable via USB Windows PC tool for testing the signal levels at the programming port Techncal Data Curren...

Page 2: ...amming tools of the manufacturers or to freely available tools In its delivery condition EXA PROG is set to the mode AVR ISP with 3 3V all DIP switches to OFF In the AVR ISP mode EXA PROG is compatible to STK500 and works with AVR ATMEL MICROCHIP Studio as well as AVRDUDE Arduino Bascom Notice With Windows 10 or 11 please only use ATMEL MICROCHIP Studio 7 x or higher Older versions do not work In ...

Page 3: ...correctly set programming software NEGATIVE In case the test is negative first check if the right voltage was selected and if the DIP switches on the EXA PROG agree with the switch position which gets displayed Are there really no external components connected to the programming port Also check the USB voltage with a multimeter by setting DIP switch 1 to ON and measuring the voltage between PIN2 p...

Page 4: ...N3 BOOT is set to the HIGH level a 50ms long reset pulse is generated and then PIN3 BOOT goes back to LOW The green LED flickers briefly as an indicator that the reset was triggered NXP LPC A short button press less than a second triggers a RESET of the connected controller After releasing the button a 50ms long LOW pulse is generated at PIN5 RESET PIN3 BOOT remains on HIGH A long button press lon...

Page 5: ...es with ATTiny controllers Please don t use with controllers with dedicated UPDI pin e g AVR32 64 128DA STM32 2 ON 3 OFF 4 OFF Programmer for STM32 Cortex M Controller with UART Bootloader The STM32 controller is programmed via the integrated bootloader through one of the serial ports see data sheet of the controller to be programmed The programmer is connected to the controller via the RX and TX ...

Page 6: ...m voltage of approx 5V Please note that the exact voltage value may vary and depends on the voltage at the USB port This value can fluctuate depending on the load and it can be between 4 5V and 5 2V However this is usually negligible when microcontrollers are being programmed Notices The maximum load on the programming port is 500mA at 5 volts and 300mA at 3 3 volts If more power is required pleas...

Page 7: ...oes not respond anyway please check the line connections first MISO to MISO and MOSI to MOSI that gets confused very often SCK to SCK and RESET to RESET Are there no other components connected to the programming lines Any capacitor present on the RESET pin must be removed Does the connected microcontroller have a power supply The AVR controller may be missing the system clock because the fuses are...

Page 8: ... the controller is reactivated for programming via a short 12 volt pulse If the controller is to be programmed in a circuit make sure that there may not be any components on the UPDI pin Please do not use this mode for controllers with dedicated UPDI pin e g AVR32 64 128DA NOTICES TIPS Connect only PIN2 to the circuit to be programmed if it does not have its own power supply and if the expected po...

Page 9: ... STM32 it must be supplied with 3 3 volts If the power consumption is no higher than 300mA the controller including the circuit can also be supplied by the EXA PROG Programming does not need a crystal connected to the STM32 The bootloader of the STM32 uses the internal RC oscillator HSI clock to generate the system clock Unfortunately the BOOT0 and RESET lines cannot be controlled with the program...

Page 10: ...T lines works very well with the tool Flash Magic If you develop your own programming tool the BOOT and RESET lines can be controlled via the DTR BOOT and RTS RESET signals This can also be done manually using the reset button on the EXA PROG This programmer does not support 8 bit controllers LPC9xx and NXP controllers without an ARM Cortex core EXA PROG as USB Serial Converter EXA PROG can be use...

Page 11: ...am the ESP8266 or ESP32 it must be supplied with 3 3 volts If the current consumption is not higher than 300mA then the controller including the circuitry can also be supplied from the EXA PROG When using ESPTOOL the control lines GPIO0 and RESET are activated automatically A manual activation of the bootloader is therefore not necessary However activation can also be triggered using the reset but...

Page 12: ...OG The English version of this manual is a translation For legal issues the authoritative version of these instructions is the German one LINKS LED Genial shop http www led genial de Diamex shop http www diamex de Download AVR ATMEL MICROCHIP Studio http www mikrocontroller net articles Atmel_Studio UPDI programming with AVRDUDE https github com ElTangas jtag2updi using with avrdude ESPTOOL for ES...

Page 13: ...EXA PROG USB programming adapter for AVR ISP AVR UPDI STM32 LPC ESP8266 ESP32 Page 13 ...

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