tzxduino firmware

[jojo]

tzx duino 1.18 build problem .


got several tzx duino's on the assembly-line and i noticed they fail to recognize the sd-card ( the do boot and generate the start-up screen ) .

So i got my own tzx duino as a reference , and that nano reads my sd card on every refusing tzx-duino in buid.

I am a bit baffled here .................. is this a known problem ??

please let me know

[sP1d3r]

tzx duino 1.18 build problem .


got several tzx duino's on the assembly-line and i noticed they fail to recognize the sd-card ( the do boot and generate the start-up screen ) .

So i got my own tzx duino as a reference , and that nano reads my sd card on every refusing tzx-duino in buid.

I am a bit baffled here .................. is this a known problem ??

please let me know

What kind of Nano, FTDI or CH340 USB chipset?

[jojo]

ch340 nano ,

display works , tzx duino boots but keeps telling " no sd card "

the error goes along with 3 nano's crossed on all pcb's

looks like some kind of timing issue

[sP1d3r]

If the SD cards were either serial or SDIO when the other is required, perhaps this could affect the detection?

[jojo]

i noticed that they all work , BUT ......

all 4 of them generate the "no sd card "-error ,

If you then reboot the tzx duino ( reset-button ) most of the times they start working .

is there some kind of in-tolerance towards the sd cards used ?

[sP1d3r]

all 4 of them generate the "no sd card "-error ,

If you then reboot the tzx duino ( reset-button ) most of the times they start working .

If you read the post from rcmolina, the Maxduino firmware needs patches for Arduino Nano and 2 other boards to avoid hanging with SD cards.
Hanging wouldn't mean a 'no SD Card' message but as the card is detected after a reset, there might be a timeout for detecting an SD card in the tzxduino firmware, which resetting might avoid.
The Maxduino firmware uses serial SD card interface so the SPI driver and the SDFat library used by the tzxduino firmware could possibly be a problem for the particular cards you are using, you haven't mentioned the class or type.

[jojo]

indeed , overlooked that.......

[abalore]

Ps. Email me if you have any trouble compiling with IDE, you only need SdFat 1.1 and SoftI2CMaster libs. I can submit you an hex file for your hw helping quickly programming without the IDE using Xloader tool

Hello, are you still working in Maxduino? I'm using it as base for my battery powered tape emulator (tape form factor). It has several interesting features: auto "motor on/off" sensing based on reel rotation and high capacity battery (around 24h of continuous usage). Please contact me at abalore “at” hotmail “dot” com since I'm not able to send PM in this forum.

Regards,
Abalore


Moderator note: email address modified to reduce the likelihood of it getting picked up by bots. Mark

[sP1d3r]

I've since tried my TZXDuino on my ZX81 with the Maxduino v1.76 firmware and it works with .p files at 3850 baud every time with the amp switched on.