Questions tagged [firmware]

Firmware refers to software running on an embedded system or microcontroller to control hardware directly.

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Modifying Option Bytes at compile time

I need to modify the option bytes at compile time for STM32L0xx controller and generate the binaries i.e. .hex, .bin. could you please suggest a solution for the same. I amusing STM32Cube IDE for ...
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1answer
1k views

How to get rid of shift and logical operations

I am trying to upgrade an old firmware of a 32-bit MCU. The fw has many macros in it which uses various operations eg., logical shift etc. I want to replace these shift and logical operations. An ...
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STM32 - Fastest way to change ADC channels after each conversion

I'm using the STSPIN32F0 (edit: I'm using the STPIN32F0 6-step control evaluation board from ST called STEVAL-SPIN3202) to develop a 6-step speed controller for brushless DC motors. The STSPIN has an ...
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1answer
59 views

Is it possible to hack/edit a camera's software to add custom features? [closed]

I am not a programmer but I am curious if it's possible to hack my Canon camera to be able to work in sync with a custom gimbal that I'm thinking of building. I want to add an object tracking feature ...
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1answer
32 views

Can I use WP(Write Protect) pin of a USB flash memory controller to prevent tampering with its firmware/stored data?

I want to have an USB stick that I can make it read-only and insert it in any untrusted PC without risking a silent BadUSB infection. I was thinking about finding an USB stick that has this WP pin in ...
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Do I need to use OpenSDA to program and debug MKL46Z256VLL4?

I am a novice to uC programming, though I have made simple circuits with the AVR ATMEGA series. For the AVRs, I used an ISP programming header along with the ATMEL-ICE. From what I am reading for the ...
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3answers
118 views

What Is Firmware? [closed]

After following the following question In what languages can firmware be written? it seems that most of the answers were oriented towards CPUs and MCUs. However, in many industries, firmware is ...
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5answers
236 views

In what languages can firmware be written?

Is there a restriction that firmware can be written only in compiled languages or Assembly languages or Machine code? Can Interpreted languages or Just In Time Compiled languages be used?
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2answers
82 views

Firmware coding - applicable standards

I would like to know if there are any applicable standards when coding microcontroller firmware (ARM) in order to achieve a specific quality level. In my case, I would like to code firmware for a ...
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35 views

Firmware self update MCU level support: MK20DX256VLH7 or MIMXRT1062DVL6A

I've been reading MK20DX256VLH7 datasheet for a day and still didn't find any description about built-in mechanisms for intrinsic firmware update. I mean stuff that helps (allows) currently running ...
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2answers
62 views

How to go from specs/requirements to design, architecture, code, tests, documentation for embedded systems? [closed]

How do professional embedded systems engineers design, architect, code, test, document systems? Any good examples, libraries, resources that showcase the process of going from specs/requirements to ...
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1answer
57 views

Incorporating RTOS into a simple sensor interfacing project for learning purpose

I am trying to switch to embedded from a software test role, and been working on learning about STM32, and almost finishing up writing drivers for I2C which I used for interfacing with a sensor. I ...
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1answer
28 views

ESP8266 / ESP-01 - Customize the NonOS “at” firmware of SDK?

I am using an ESP-01 this way: MCU <-> UART <-> ESP-01, using AT firmware/NonOS on ESP-01. I have my own encryption functions, and I would like to implement them both on MCU and ESP-01 sides at ...
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50 views

Keyboard libraries or simple code?

I am in research for building a custom keyboard using an Arduino or Teensy microcontroller. Concerning the programming of the M/C I have come across firmware libraries such as tmk or qmk. Yet I ...
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1answer
47 views

When does the stack pointer get copied from flash to SP on startup?

I'm trying to track down a problem on a MKV31F256 micro. The firmware immediately jumps to the hard fault handler on startup. I'm able to set a breakpoint on the first assembly instruction in the ...
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3answers
2k views

How to extend a microcontroller GPIO to ~300 inputs?

I need to find out the address of buttons pushed. Say I need about 300 Input port required dedicated for individual buttons. Then I would need 300 I/O pins to read the address of a pushed button which ...
2
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1answer
100 views

DIY laser cutter - laser is turning off at various places while cutting [closed]

I converted my Monoprice Maker Select IIIp 3d-printer into a laser cutter by mounting a 4W diode laser to the printhead, and using the cooling fan leads to control the laser beam, via a simple ...
21
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7answers
5k views

C - wrapping globals in a struct?

A firmware style question concerning C. I have some legacy code I am tidying up. One of the nasty features is global variables being scattered through the source files. I can make a few of them ...
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2answers
72 views

Data send only in MCU based I2C Slave

I want to know that is it possible that a Slave I2C device which is a 32-bit MCU, for example STM32F407, I write its I2C data send function and send data through it after every 1 sec? I am asking this ...
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2answers
309 views

DAPLink firmware doesn't operate with OpenOCD

  Why this is not a duplicate Some people seem to think this question is a duplicate, but there is an important difference: The How to update the SWDAP firmware? question is all about how to ...
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1answer
259 views

How to update firmware over DFU on read protected STM32 microcontroller with command line tool?

STM32 microcontroller have bootloader in system memory witch is write protected (and it works). This can be booted with right sequence, what I don't cover here. ST provide DfuSe tool to upgrade ...
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38 views

How to select the compatible USB to SPI IC Programmer?

I built an image of Coreboot (open source firmware) and wanted to flash it on the Minnowboard Max. SF100 is compatible to do the job (as described in this article). However, I want to be clear on the ...
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2answers
204 views

IAP bootloader not jumping to the application address

I am working on IAP in STM32F4. I received .bin file using uart and flash it in 0x08004000 address successfully and disable irq , set msp , set vector, deinit hal , reset the systick registers but the ...
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2answers
882 views

STM32 firmware upgrade (In-System Programming) over USB?

There are many ways to program an STM32 chip (in my case STM32L4R5): USB DFU mode (using DFuSe utility from ST) UART Serial Port (through something like FTDI chip)...
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1answer
59 views

Smart vs Intelligent vs Adaptive vs Advance (etc) Embedded Devices [closed]

I hope my question is not off-topic here. I am asking it here because it is directly related to the hardware devices which are primarily based on MCU's. These Embedded System devices are used every ...
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0answers
18 views

Regenerate IRK for NXP QN9020 Bluetooth Low Energy Peripheral

According to Bridging the GAP: Bluetooth LE Security Part 3, IRK Re-generation Each time you clear your peripheral’s bonds, and open it up to a new pairing, you should re-generate your IRK. Why? iOS ...
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31 views

HC08 Bootloader

Can someone explain the basic process of flashing a bootloader to an HC08 based MCU? Specifically the MC908QB8. If I understand it correctly, the firmware can be updated via serial while the chip is ...
2
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1answer
122 views

STM32F411VE Custom bootloader USB de-Init issue causing Jump to app fail

I'm developing a custom a bootloader on STM32F411VE MCU which must download a .bin file from USB key and flash it into the application sectors of flash memory. Following the examples provided with ...
4
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1answer
104 views

How can I make it so that customers who buy my arm based product can easily update the firmware?

I'm building an arm-based (stm32F7) hardware device which will have a USB port. I would like to be able to update the firmware and distribute it such that customers with my device can easily install ...
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1answer
62 views

What pins on a nRF51822 do I connect to a STM32 programmer?

I want to be able to program a nRF51822 with this programmer but I'm not sure what pins on the actual chip I should use, and all the guides seemed to be using a different chip
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72 views

How to specify in the project or firmware of the application, where to start writing the code?

I have a bootloader to PIC18F4550 that was written using Mikro C for PIC and I have two firmware applications, one was written using Mikro C for PIC and the other using MPLAB X with XC8 compiler. With ...
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1answer
236 views

MPLABX with PIC18F4550 Debug and programming are not working

First I used MikroC for PIC to modify a firmware to a PIC18F4550. I was programming the device using MPLAB IPE and the PICKit3 programmer, everything was ok. Now, I need to change to MPLABX XC8 ...
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3answers
283 views

How to prevent someone clone PIC [closed]

ACT 1 Okay I know there is code protection system on PIC. But it is preventing someone read the code, not copy. It looks still easy to clone and run on another circuit. Can you suggest another ...
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0answers
39 views

Simple relocatable image format options

I am writing firmware for an ARM platform in which I want to have the main bootloader relocatable in memory rather than always loaded at a fixed address during boot. This means that I need a ...
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1answer
40 views

Is Pull-up present by default?

I'm using the MC9S12DP512, Motorola's microcontroller. I was executing a service and ,at the end, I put low logic level at the pins PS4, PS5 and PS6, then after that, I configured these pins as inputs....
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2answers
569 views

if(){} else{} if(){} VS if(){} else if(){} in PWM control [closed]

I'm using timer0 and a gpio pin to generate a 300Hz PWM signal on an ATmega2560. The details if you care: F_CPU=16M, timer clock prescaler /256, count_max=208 The frequency changes depending on if I ...
2
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2answers
1k views

OTA Programming of STM32

I am currently using ST32L152RE controller interfaced with BLE CC2640R2F module and 4 MB external flash memory interfaced through spi. I was trying to upgrade the firmware of my st controller using ...
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2answers
594 views

Garbage data when using UART on atmega2560

(updates at bottom) I am using an Arduino Mega with the SoftwareSerialExample sketch on it to send and receive bytes through UART on my ATmega2560 (which is actually on a Arduino Mega Board). ...
0
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1answer
59 views

Separate Vector Table for USB Bootloader (Infineon 4400-CortexM4F)

I am developing a USB bootloader for Infineon XMC 4400 micro . I have modified linker_Script.ld file and have allocated 32K for flash. MEMORY { ...
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2answers
631 views

Using Arduino Mega as Atmega2560 AVR development board with Atmel Studio 7

(updates at end) Qualifier: I am posting this here and not on the Arduino Stack Exchange because my question is about firmware development and not Arduino development. Project: I am designing a PCB ...
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0answers
47 views

Is it possible to use EL3 on an AllWinner SoC (R18)?

I have been looking for a cheap development board to play around with ARMv8 EL3 mode in the interest of writing a monitor. I stumbled across the PINE64 recently and it seemed like a great fit. It used ...
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2answers
276 views

Reverse engineering SREC firmware

I have a firmware from a long discontinued product that I would like to improve on. The firmware is in a .mot file format (SREC from my research) and is uploaded using a tool called M16C asynchronous ...
3
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3answers
628 views

How to define 14-bit lookup table for PIC/XC8 (if it's possible to do without assembly)?

I'm writing the firmware for a simple testing device that would need to store a very large lookup table (I need 13500 entries with values 0..100 decimal). The target PIC MCU is PIC16F1829 (8K words of ...
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0answers
194 views

Can we store hex data through UART into flash and RUN it from that particular location

I am trying to store my hex file in another sector of the flash memory i.e (0x00050000) I want to store a hex file at different sector of the flash and to change the execution point to that address ...
4
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4answers
1k views

Error handling in embedded systems development

I am developing a Firmware and I am using 3 layers: Driver, Platform and Application. In order to handle the communication between these layers, I am using an approach where each function will return ...
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1answer
150 views

On-board ST-Link Firmware

There is an on-board ST-Link on STM32F4Discovery board based on STM32F103 MCU. If I have to use this circuit in my design then where could i get the ST-Link firmware for STM32F103 MCU?
3
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2answers
323 views

Multiple(five) alarm time setting in stm32f0 mcu

I am working on my hobbyist project and need to develop the alarm timings. And RTC and Timer are new for me and I am confused in RTC Alarm time setting. I need to make alarm with RTC for five ...
0
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1answer
1k views

STM32L011 jump to bootloader from user code

I'm trying to make it so that my STM32L011 can jump from user code to the ST bootloader that allows flash to be reprogrammed over USART2. This is hypothetically the same question as STM32F091 Jump to ...
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3answers
203 views

Embedded Firmware Question - Memory dump

Ok so the back story is this. I landed an online code interview with a company that shall remain nameless. I know I am not ready for a job there but I was basically given the chance by an insider. ...
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1answer
63 views

What physical tool to use to quickly dump firmware?

Recently, I managed to take a dump of the firmware and write a modified one using the pins that I marked with red by soldering 4 thin wires to those points. Now, I needed to perform this more than 50 ...