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Questions tagged [isp]

In System Programming. Updating a part's memory while it is on the end product's PCB.

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Programming mbed LPC1768 via ISP

I'd like to experiment programming the mbed's LPC1768 dev board (https://os.mbed.com/platforms/mbed-LPC1768/) using ISP with FlashMagic. Is this possible without requiring physical modification of ...
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69 views

STM32F429 Discovery debug options

I recently acquired an STM32F429 Discovery Kit (pictured below). I'm new to the M4 cortex series microcontrollers and ARM in general having only worked with PICs before. I've seen some really nice ...
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25 views

How to enter into ISP mode through 'reinvoke ISP' in LPC1759

In LPC1759, I entered ISP through "reinvoke ISP" with the following steps Disable PLL Reset timer 1 Re-map interrupt vectors Set watch dog timeout Reinvoke ISP After entering into ISP, What exactly ...
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106 views

JTAG, SWD, EDBG, ICSP, ISP terms

JTAG, SWD, EDBG, ICSP, ISP . Can someone simply explain their differences. For example if EDBG debugger can ALSO program flash, why Arduino boards have both ISP and EDBG ? http://www.armlearning....
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1answer
29 views

How To Program Atmega256rfr2 using ISP?

I have a new custom built PCB circuit incorporating an atmega256rfr2 chip. I really can't program the chip using AVRISP MK11 based programmer (Olimex brand). But it can program the Atmega328p DIP chip ...
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1answer
33 views

How do I maintain ICSP functionality?

I'm a novice hobbyist building a trivial circuit where an ATTiny 85 controls an RGB LED. In addition to the three PWM outputs, I have 2 inputs. The first input is a potentiometer I'm using to set ...
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1answer
87 views

Minimal external components for AVR CPU

If I want to program a new AT90USB1286 series chip via the standard 6 pin ISP header, do I need any additional components wired up at all? I'm wondering specifically about the need for a quartz ...
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2answers
226 views

In-system programming of the SPI Flash chip [closed]

Device have Serial NOR Flash chip MX25L6406E located on the rear of the PCB (SO-8/SOIC-8 Package). Is it possible to program chip without desoldering it? (In-system programming). As I know, it depends ...
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84 views

AVR programming

This question might be asked somewhere, if so all references would be appreciated. Hello, I have programmed Atmel chip Atmega32U4 through USB. It is possible because it supports USB programming. I ...
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32 views

Using generic tools to program ATF150X series CPLDs from a JEDEC file (understanding JTAG details)

I have a number of ATF1504 44 pin PLCC CPLD devices. I can design for them without a problem to get a JEDEC file. I want to program them via the JTAG ISP interface which has the same pinout as the ...
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1answer
57 views

How to stabilise SPI connection

To salvage a server with a broken BIOS, I am attempting to in-situ program a chip via SPI using a Raspberry Pi 3B: After connecting my clip and wiring it up (and measuring all the leads to ensure I ...
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54 views

Can I program an ATtiny85 using AVR SPI headers with I2C peripherals attached

I am preparing a schematic that includes an ATtiny85 MCU and a few I2C peripherals. It also has a MOSFET attached to pin 6 that drives a motor. I plan to use an AVR header to program my device. I'm ...
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155 views

Need Help with Python Script - ' 4 Dollar Programmer'

I am working on an embedded project and have made my first PCB with a processor mounted on board. The trouble seems to be actually getting my code onto that processor! I was sort of banking on being ...
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1answer
278 views

Is my PCB layout ok? (ATMEGA32U4, WizNet W5500, Ethernet)

I want to design a device that listens to certain network communication and calculates a MIDI clock signal out of this information. The MIDI output is via classical MIDI port or via USB MIDI. I am ...
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53 views

Data upload LED on SPI MOSI line

I'm attempting to make my own ISP programmer for an Atmega168-20PU. For the sake of learning I want to have an LED flash as bits are being flashed to the chip. If I use an SMD LED 0603 size, in series ...
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2answers
436 views

Programming several AVRs with one ISP: which line to break?

Let's suppose that I have two AVRs connected to one ISP connector. To programm only one MCU in this configuration I neet to break one (or mayby several) lines goes to the MCU I don't want to be ...
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54 views

PSOC 4 Bootloader will not work when P4[0] and P4[1] Connected to I2C bus

I have been desparately juggling the pin allocations on this project in the hope of freeing up the VREF pin, and thought I had managed to do so. Previously my system was successfully transmitting over ...
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2answers
2k views

Configure avrdude for programming with a ft232r cable

I bought a ftdi cable with the following pins. Vcc GND RX TX RTS CTS It's possible to use this device to upload code to an ATmega328p using the avrdude utility? When I run this line on linux ...
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1answer
266 views

Clip type for in-system programming (SOIC8 vs DIP8)

Updated: What clip can I use to connect to this [specsheet] SPI flash chip in a DIP8 package? note: this picture is of a motherboard that belongs to someone else, but mine has the same manufacturer,...
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71 views

FOSS-base AVR ISP programming with USB

I've been using a free software stack for AVR programming - AVR GCC + avrdude on Linux, with parallel DIY programmer cable. Since the parallel bitbang programmer doesn't work with USB printer cables, ...
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1answer
134 views

Can ATMEGA JTAG be disabled and enabled just with JTAG?

I am currently developing a schematic based on the ATmega32U4. I need to be able to program the embedded chip, so with ISP or JTAG (preferably). The problem is, I also need the analogs functions of ...
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1answer
114 views

why isp avr MCU doesn't need ground? [closed]

Few days ago, while making my ic burner, I notice one thing very interesting and weird. It's that AVR MCU ISP interface really doesn't need to be connected to ground at all. Why does AVR-ISP work ...
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1answer
48 views

What is the role of a Network Interface Device in a ADSL connection?

What is the role of a Network Interface Device in a ADSL connection? Why the filter is not enough? What is the difference between them?
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1answer
97 views

Shared programming pins

Alright so there is a question that I need to ask. I am designing a PCB and I plan to include a ISP header for programming. Now one of the programming pins (PB3 - MOSI) is connected to a push button ...
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1answer
98 views

Will my circuit interfere with ATtiny25 in system programming?

I've got a simple circuit with an ATtiny25 on which I indend to do in system programming. I'm wondering, will the rest of my circuit interfere with the SPI programming? So the data sheet says: PB0 = ...
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92 views

ATMega/Tiny barely working on breadboard without ISP

currently I want to get an ATMega328P and an ATTiny85 to work on a breadboard, which should talk to each other and an LCD via TWI. Anyway, I came across some issues I don't seem to be able to fix at ...
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1answer
59 views

supplying power for in-system programming

For this PCB there will be a voltage regulator that provides 3.3V from 12 VDC. There will also be a 6-pin connector for doing In system programming via SPI. The SPI programmer is going to be an ...
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2answers
415 views

How can an ISP program an AVR over SPI if there is no code on the device?

I am trying to understand how an ISP can write machine code into a microcontroller's memory. In the case of AVR microcontrollers (such as the ATMega), you can use a special in-circuit programmer that ...
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1answer
145 views

Capacitor on mosi/miso lines

I'm designing a project based on Atmega328P which uses QMatrix to drive 15 capacitive touch buttons. Well, QMatrix sensors requires a couple of resistors and capacitors on sensor pins Is any issue if ...
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2answers
818 views

Can anything be done about this AVRISP mkII or is it dead?

It seems that my AVRISP mkII programmer died in a strange incident. It was connected to my computer via USB cable and to a custom board which hosts an ATXMEGA32A4U via its 6-pin programming header. ...
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2answers
285 views

How does AVRDUDE communicate with the programmer?

I'm trying to understand exactly how AVRDUDE communicate with the AVR Programmer, for example USBtiny or Arduino itself as a programmer, to send the firmware to the microcontroller. As a motivation ...
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531 views

Serial programming of several AVR microcontrollers simultaneously via ISP interface

I'd like to put several PCBs in a panel with only one ISP connector routed to each MCU in parallel. I hope that it will be no problem that many MCU's outputs will be connected together as it is ...
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1answer
262 views

How can I save a floating point value to a Microcontroller data Flash

I'm trying to save some floating values to the Data flash of my Nuc220(ARM-M0 32 bit) Microcontroller using ISP procedure. ...
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1answer
188 views

What mode (CPOL, CPHA) should a programmer of an AVR ATMEGA324PA use?

I'm using a logic analyser to look at the MOSI, MISO, SCK and RESET lines while an ATMEGA 324PA is being flashed by at Atmel AVR MKII programmer. The clock starts high, so that makes me think it must ...
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1answer
144 views

How am I able to automate AVR ISP programming?

I have this AVR programmer, which I set up as STK500 in Atmel Studio. All this works fine until I need to do mass programming with different EEPROM contents. So if I do no changes to the toolchain ...
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1answer
40 views

CPLD ispmach 4256ze starter pin connention configuration

I am an undergraduate student that working on a project which need to use an ispMACH 4256ZE CPLD to implement some data transfer function in my circuit. Need someone whoever have worked with CPLD to ...
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1answer
322 views

Serial Programming and I2C port “conflict”

I'm designing a board in which an Attiny85 is connected to an accelerometer (MPU-6050) via I2C. The I2C pins are in the ISP bus (SDA/MOSI, SCL/SCK). I wonder what happens to the accelerometer during ...
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1answer
258 views

ATtiny13A cannot be programmed anymore with Arduino as ISP at 500 Hz

My ATtiny13A fuses are set to use the internal 128 kHz clock without clock divided by 8. I found online an ArduinoISP sketch that allows me to program it with that clock speed. But then I uploaded ...
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1answer
629 views

programming atmega2560 by ISP on self-made PCB

For one of my project, I need an atmega2560. So I made a PCB with the atmega2560 and ISP headers. But I can't communicate with the atmega2560 There is also an external 16000Mhz oscillator. Here is ...
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1answer
249 views

AT89LP51ED2 SPI ISP — First attempt to enter ISP mode after reset yields wrong data back, but second attempt works

I have a board using an AT89LP51ED2 from Atmel -- this is an 8051-derivative with on-board Flash program memory and a SPI ISP interface, which I am using my Bus Pirate to drive (30kHz speed, pullups ...
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2answers
1k views

Pin Assignment in ispLEVER Classic

I have an ispGAL22LV10C that I'm trying to program. I wrote and synthesized the VHDL in ispLEVER Classic, but I cannot seem to figure out how to create pin assignments. Documentation on this is kind ...
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2answers
592 views

Atmega basic circuit with or without crystal

I want to build a basic Atmega8a (DIP-28) micro-controller circuit (programed using a 10 pin ISP socket). I have found several basic circuits. Some of them use crystal oscillator, some use internal ...
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2answers
271 views

AVRISP mk2 clone can program Arduino Uno, but not stand-alone ATMega328P

I have an AVRISP mk2 knock-off that I can't get to work. Scenario 1: AVRISP mk2 clone vs. Arduino Uno: works If I take an Arduino Uno, and plug the 6-pin ICSP cable of the AVRISP onto it, one of ...
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1answer
306 views

AVR Atmega164P UART / ISP programmer problem

I am having a problem with the USART on an Atmega164P. When the ISP programmer is connected everything works fine. If I disconnect the programmer then all I get is garbled serial and the chip won't ...
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1answer
530 views

In-place programming of ATtiny85

I've been playing around with an idea for a little hand-held gaming device using a Nokia 5110 screen and an ATtiny85. The ATtiny is programmed using my Genuino UNO as ISP. I was wondering if it's ...
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1answer
236 views

Low speed device is recognised as full speed (USB tiny-like AVR isp programmer)

I recently tried to replicate the setup proposed in this instructable. Everything is fine until I hook up the device into (any of) the USB ports. Then, dmesg on ...
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2answers
3k views

Cannot Connect AVR USB ISP 2.0

After searching for a about 10 hours, this is my last hope. I've made my own development board, with Atmega8. The program is also ready. I bought Atmel USB ISP 10pin from a local shop to transfer ...
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2answers
307 views

USBasp progarammer with ZIF socket?

I want to make a USBasp programmer for myself. I have the schematic. But they used a 10 pin ISP connector, whereas I want to use a 40 pin ZIF socket. How do I change the circuit for this purpose? I'...
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2answers
456 views

Programming DS89c450 ISP

I have a DS89c450 which I wish to program and so far have had no success. I have no programmers, so I need to utilise the ISP capabilities. I have the crystal connected (16Mhz) as well as the power. ...
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1answer
338 views

RS232 ISP programming

I have a saleae digital analyzer and i am using it to listen to on a ISP programmer. (not to steal someone's code, but to build my own programmer). It only has two wires (GND & SDA) The data just ...