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Interpretation of the graph of accelerometer

I have plotted the raw values of my accelerometer in gnuplot, and the acceleration in the dimensions of x, y and z are as follows... The accelerometer sensor is in a steady position, my question ...
3
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2answers
92 views

Design Decisions for using ADC with no VREF

I was looking at Freescale's KE02 processor family, and the MCU designers made an interesting design decision revolving around the ADC that I can't completely wrap my head around. The KE02 has an ...
2
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1answer
259 views

Unable to program Freescale Kinetis KL26 microcontroller over SWD

I just assembled a board that I have created that basically acts as a breakout board for a MKL26Z32VFM4. Today, I am trying to get it to communicate over SWD so I can program the initial bootloader. ...
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2answers
102 views

FRDM-kl25z Serial Buffer Issue

I'm sending data over Serial to a FRDM-kl25z via a printf statement on another uC; ...
1
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1answer
131 views

Serial Link Between 3.3V devices

I have an RPi and a freescale FRDM-KL25z controller which will talk over serial protocol. I'm using the pyserial library on the pi: ...
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2answers
69 views

Single issue and Dual issue architecture

I am studying the PowerPC architecture on the MPC5644B. The documents from Freescale mention it to be a single Issue architecture. The data sheet states the following, ...
1
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1answer
160 views

Value for feedback resistor in pierce crystal oscillator configuration

This question is partially an "understanding english" question and partially and "understanding the pierce oscillator configuration" question. Backstory I'm currently looking at using a Freescale ...
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2answers
147 views

Can a digital input having internal pull up resistor drive a load?

simulate this circuit – Schematic created using CircuitLab I am working on MC56F8006 DSC . On power up or reset the default state of all GPIOs is inputs with internal pullups enabled. I ...
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0answers
65 views

Enable and access AUART on iMX28

I designed my own PCB with a iMX28. I based my design on the mx28evk board and I use Yocto + Linux kernel 3.12 + the devicetree for iMX28EVK. Because my design is not the same than the mx28evk, I ...
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3answers
578 views

Power cycle error when trying to program/debug HCS08 MCU

I'm trying to program a Freescale MC12311 transceiver IC which has a 9S08QE32 MCU embedded in it: MC12311: Sub-1 GHz RF and 8-bit HCS08 MCU with 32KB Flash, 2KB RAM I'm using a Background Debug ...
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0answers
89 views

USB Bluetooth dongle into KL25Z

I have a USB bluetooth adapter that I wish to connect to a Freescale KL25Z board. The latter only contains two female USB mini connectors, therefore I plan to establish a connection using a USB mini ...
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1answer
162 views

SPI SBC communication

I am using MPC5748G controller, in that i want to communicate my SPI with the SBC chip on board i.e MC33905, By going through the data sheet I am sending the proper commands to SBC through SPI API's ...
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1answer
247 views

Analyzing the crystal frequency (Bus Clock Frequency) of a HCS12 Microcontroller using an Oscilloscope

I have an HCS12 Mircocontroller and I would like to capture the crystal frequency from the bus clock on a oscilloscope. How do I find out where I should connect my probes on the board to analyze ...
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2answers
357 views

How to flag Kinetis bootloader to load new fw?

I have a board that features a Freescale Kinetis K60 MCU and I want to write a bootloader for it but I don't have hardware in place to signal it after a reset to go into "load new firmware" mode vs. ...
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2answers
771 views

Measuring water pressure in a tank

I am trying to build a pressure sensor ( PSI gauge ) that will be used to measure and monitor the pressure in a pool water filter. These generally have a mechanical pressure gauge like this.... ...
6
votes
1answer
553 views

Still getting link error after switching to banked memory for Freescale HCS08

My program for a Freescale MC9S08DZ128 (HCS08 family) got too big, and I was getting the message: ...
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0answers
82 views

MCF51JE SPI NOR Flash

I am working on an application that requires a NOR SPI flash unit from Micron(N25Q). What I am trying to figure out is how to address the device from a MCF51JE micro from Freescale. As I understand ...
1
vote
1answer
111 views

MAC Address and ColdFire MFC5329

I am working with the ColdFire MCF5329. I have worked on other projects where the Ethernet function was a separate chip, namely, SMC. The SMC Ethernet chip has pins out for a 64 byte EEProm to store ...
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2answers
275 views

Watchdog enables itself after reset

I am using TWR-S08DC-PT60 board which has a MC9S08PT60 microcontroller. I am trying to disable the watchdog timer in my application, just for ease of development. After configuring it in the ...
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2answers
392 views

Apply PWM signal to PIN of a Microcontroller

I am using the MC9S08DZ60. I have been give a circuit diagram according to which i must program the micro-controller. I am using Code warrior with Processor Expert which allows me to initialize the ...
2
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1answer
513 views

Timers and internal clock generator on Freescale MCU

I am using MC9S08AW60A with DEMO9S08AW60E Board (Freescale). I have studied about the timers given with the MCU. I wish to know how exactly to Implement timers by code. The Freescale suite also comes ...
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2answers
366 views

Switch on a LED: why doesn't this code work?

I am using DEMO9S08AW60E and using Codewarrior(Version: 5.9) with Processor Expert. ...
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1answer
190 views

Basic Question Regarding Programming in CodeWarrior [closed]

I have basic knowledge of C++ and MicroControllers. Please Consider the following code excerpt from the header file of MC9s08aw60(freescale), i am working with Codewarrior V5.9. ...
3
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2answers
724 views

PWM timer problem with HCS08 - freescale

I am using a MC9S08LH64 microcontroller's timer module to generate an internal timer for synchronization. bus clock is at 4.3 MHz, modulo is set at 4309 (TPM1MODH and TPM1MODL) and I am expecting ...
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2answers
358 views

BeeStack and the Freescale MC13224

I've been a long term desktop application developer and now I have the need to dive into embedded. What I am looking to do is implement a Zigbee mesh network where there is one co-ordinator ...
1
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1answer
161 views

Help finding a freescale MC68LK331CPV27 datasheet

I'm looking for an old cpu datasheet which seems to have disappeared from existence. It is for a freescale MC68LK331CPV27. I've ran out of stock on an old cpu and the replacement (MC68LK332ACAG16) ...
19
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2answers
1k views

Resistive touchscreen with 5-wire connection & Freescale IMX28

I have a IMX28EVK board and I would like to to connect this board to a 5-wire resistive touchscreen. In the Reference Manual of the I.MX28, Freescale said: LRADC2 - 6 can be used for 4/5-wire ...
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1answer
90 views

Freescale MCP8260, don't understand pins

I am looking at the Freescale MCP8260 processor. For programming PINS you set values to some registers.. I would like to use MII interface for Fast Ethernet for example... I can see the Dedicated ...
7
votes
1answer
477 views

On Freescale iMX31, how can I translate SDRAM address to CPU address?

[This is a re-post of http://stackoverflow.com/q/5346225/69172] I'm new to iMX31 and embedded systems, please help me to understand the translation from SDRAM address to ARM CPU address, especially ...
2
votes
2answers
96 views

Using Port DD as GPIO on MCF5282

I’ve got a MCF5282 that I’m trying to use PDD4 as a GPIO on. In my setup code, I’ve got: ...
5
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4answers
806 views

How to get into Freescale 32-bit MicroControllers?

Which websites/blogs/tools/books/manuals would you recommend for getting into the Freescale microcontrollers, especially the 32-bit models? What are the best development tools (IDEs, compilers) for ...
21
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10answers
29k views

Why is AVR used in Arduino?

Why is Arduino using AVR? I understand that they are the official processor but there isn't a reason the code couldn't be ported to an ARM or a Freescale architecture other than cost, right? As long ...