In your opinion is better the raspberry pi or ch341a to reach my goal? Should I buy a breadboard for create better connections ?
Can you draw a schematic that I can follow? Il 6 mar 2018 21:55, "Nico Huber" <[email protected]> ha scritto: > Hello Luca, > > On 06.03.2018 07:25, Luca Bacci Bonotti wrote: > > I tried with chip soldered and unsoldered. Same results. > > same results? probably due to very different problems. Especially when > the chip is not part of a circuitry (that might already take care), you > have to connect all input pins of the chip. Also, very often, a series > resistor at least on the MISO output is required. > > > I previously tried programming with raspberry PI but it was unable to see > > my chip. > > I have both CH341A and Raspberry Pi. > > When you use the Raspberry Pi, make sure you set the `spispeed` parame- > ter of linux_spi to something reasonable (I'd start trying around 1000, > i.e. 1MHz), the default is OS dependent and often not reliable. > > > Where should i connect /HOLD /WP on the CH341A ? > > /HOLD should be pulled up towards VCC (i.e. using a series resistor, > 10kOhm maybe), state of /WP usually only matters when the chip has some > write-protection set up, so either pull up towards VCC or down towards > GND (if in doubt, up). > > Nico >
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