
João
Moved FTDI like suggested.All works fineMikeB wrote: ↑Fri Feb 24, 2017 12:13 amBEFORE you remove any components, please try the following.
Use the normal firmware.
You have the FTDI adapter connected to the Tx and Rx pads. When you tested with the normal firmware, you can read and write files to the SD card, so these connections are working. Move the connection to the Rx pad to the PD2 pad and check you can read or write files still.
If that works OK, move the connection to the Tx pad to the PD3 pad and check for reading or writing files again.
If that works, then the PD2 and PD3 signals are working correctly.
Since the Tx signal is working OK, I can see no reason to remove the transistor Q4.
The reason for having D1, D2, D3 and Q4 is so that you may keep the FTDI connected while the Megasound is connected to the main ATMEGA128 without any electrical problems.
Mike.
So what to check now??? dont understand why Backlight dont workMikeB wrote: ↑Fri Feb 24, 2017 11:18 am
So, with this loaded:
1. Do you see the 588588... on the terminal? YES
2. Does the voice file play? Yes File 40
3. Is the backlight flashing? NO
4. Do you see extra characters when you press the trim switch? Yes
5. What happens if you press the "Esc" key TWICE on the terminal (not the characters E s c, but the key labelled "Esc")? I expect some new characters and the output to stop. Nothing changes if i press "ESC"
Mike.
Thanks for replyMikeB wrote: ↑Fri Feb 24, 2017 4:45 pmPlease press the Esc key several times. If you have LEDs on the FTDI, please check the "Tx" LED flashes when you type a character.
The processor should be turning the backlight on and off about once a second. The signal is on PB1 (pin 13) and is buffered by a transistor. Please check there are not shorts on the board causing the transistor to be 'on' all the time. You may be able to see the voltage on pin 13 changing from 0 to 3.3V with your meter. The signal goes first to R5, so that is a good place to put the meter probe.
Mike.
Thanks will be waiting !!!
Exactly as I said here
Donate Link is under all my posts. There are 2 links. one of them is the donation link. For Mike obviously
Yes, that is why I wrote the black text
Thanks for your time again
Code: Select all
atmega328_isp: atmega328
atmega328_isp: TARGET = atmega328
atmega328_isp: MCU_TARGET = atmega328p
# 512 byte boot, SPIEN
atmega328_isp: HFUSE = DE
# Low power xtal (16MHz) 16KCK/14CK+65ms
atmega328_isp: LFUSE = FF
# 2.7V brownout
atmega328_isp: EFUSE = FD
atmega328_isp: isp