topic Re: Bit banging to Read and Write on to an EEPROM in Kinetis Microcontrollers

Bit banging to Read and Write on to an EEPROM

pradyumnakammar — Fri, 21 Jun 2013 07:50:09 GMT

I am new to freescale and am trying to initialize GPIO pins . Has any one tried or have documents on how to READ and WRITE on to an EEPROM by bit banging method ?

using KL05, atmel's 512kb EEPROM ,writing a C program to read and write data using bit banging( not via I2c module)

i need info on how to configure GPIO or FGPIO pins to do this.

Acknowledge polling is the major concerns ... how do i do it?

Re: Bit banging to Read and Write on to an EEPROM

Hui_Ma — Wed, 26 Jun 2013 07:44:19 GMT

Hi,

If you need a software code to realise GPIO pin to simulate I2C communication?

B.R.

Ma Hui

Re: Bit banging to Read and Write on to an EEPROM

BlackNight — Wed, 26 Jun 2013 08:54:23 GMT

Hello,

yes, I'm using I2C bit banging to external EEPROM modules:

Bit Banging I2C | MCU on Eclipse

It features as well Processor Expert components for the 24AA external EEPROM modules (see losing my mind over i2c interfacing to 24lc00 eeprom).

Re: Bit banging to Read and Write on to an EEPROM

pradyumnakammar — Fri, 28 Jun 2013 07:23:37 GMT

Hello Ma Hui,

yes i need a code to make GPIO pins Simulate I2C communication... I need to communicate with an EEPROM.

failed miserably in writing the code as SDA pin of the EEPROM doesnt go low after sending the device address

some help will be really appreciated

Thank you

Re: Bit banging to Read and Write on to an EEPROM

pradyumnakammar — Fri, 28 Jun 2013 07:27:33 GMT

Hello Erich ,

thank you so much for replying... i'm actually writing code in Kiel. will have to write my whole code again

will try and go through your component n use it ...

Thank you

Re: Bit banging to Read and Write on to an EEPROM

BlackNight — Fri, 28 Jun 2013 08:43:32 GMT

Hi Pradyumna,

Keil supports Processor Expert, so no need to re-write that code.

Re: Bit banging to Read and Write on to an EEPROM

pradyumnakammar — Fri, 28 Jun 2013 10:14:43 GMT

0_0 really? thats cool .. how should i start then??

pls help how n from where shall i start

Re: Bit banging to Read and Write on to an EEPROM

BlackNight — Fri, 28 Jun 2013 17:41:43 GMT

Hi Pradyumna,

yes. Here is a tutorial:

Using Keil µVision (ARM-MDK) with Processor Expert Driver Suite | MCU on Eclipse

I hope this helps.