topic Re: AN2295 Serial Bootloader - Changes needed for 36.864MHz Osc. in 8-bit Microcontrollers

AN2295 Serial Bootloader - Changes needed for 36.864MHz Osc.

S_B_D — Tue, 09 Dec 2008 21:42:37 GMT

Hi,

I would like to add to my project ( working on MC9S08JM60 ) a serial (UART) bootloader.

My MCU runs off an external 36.864MHz oscillator and I use SCI 2 for the UART communication.

What changes are need in the AN2295 code to adapt it to my hardware?

Thanks,

S.B.D

Re: AN2295 Serial Bootloader - Changes needed for 36.864MHz Osc.

peg — Wed, 10 Dec 2008 05:00:18 GMT

Hello and welcome to the fora SBD.

Given that the JM is now fully supported by this bootloader perhaps you can let us know what, more precisely, you are having issues with.

Re: AN2295 Serial Bootloader - Changes needed for 36.864MHz Osc.

S_B_D — Wed, 10 Dec 2008 16:41:22 GMT

Thanks for the kind reply.

I was having problems getting the bootloader to work. At first I thought that this is due to the oscillator I was using that's generating a different bus clock and baud rate.

After reviewing the project i saw that its using the internal osc for the bootloader so its independent of my hardware.

Anyways, late last night I finally got it to work.

At this point I am working on modifying the code to enter bootloader mode by a UART command.

After flashing the new firmware with the bootloader will a software reset be needed?

S.B.D.