5 touchscreens sharing MISO on a due
hi there,
i've got 5 tft touchscreens (waveshare) hooked due using ili9486 on mosi/sck , pins 22-52, external psu.
one of screens has sd card , miso hooked up. on screen, touch events work expected. also, jpgs rendered expected sd card onto 5 screens.
i'm hoping able read touch events on other 4 screens. once hook miso, however, sd card starts failing - either won't initialize @ all, or initialize partially render jpgs if miso devices conflicting somewhat. also, touch events on other screens registered last initialized touchscreen.
it seems i'm missing fundamental sharing miso between mutiple devices (compared mosi)? tips in right direction appreciated!
i've got 5 tft touchscreens (waveshare) hooked due using ili9486 on mosi/sck , pins 22-52, external psu.
one of screens has sd card , miso hooked up. on screen, touch events work expected. also, jpgs rendered expected sd card onto 5 screens.
i'm hoping able read touch events on other 4 screens. once hook miso, however, sd card starts failing - either won't initialize @ all, or initialize partially render jpgs if miso devices conflicting somewhat. also, touch events on other screens registered last initialized touchscreen.
it seems i'm missing fundamental sharing miso between mutiple devices (compared mosi)? tips in right direction appreciated!
hi there,would post diagram of circuit?
i've got 5 tft touchscreens (waveshare) hooked due using ili9486 on mosi/sck , pins 22-52, external psu.
one of screens has sd card , miso hooked up. on screen, touch events work expected. also, jpgs rendered expected sd card onto 5 screens.
i'm hoping able read touch events on other 4 screens. once hook miso, however, sd card starts failing - either won't initialize @ all, or initialize partially render jpgs if miso devices conflicting somewhat. also, touch events on other screens registered last initialized touchscreen.
it seems i'm missing fundamental sharing miso between mutiple devices (compared mosi)? tips in right direction appreciated!
to hooking second miso (master in, slave out)
do want touch screens accessed separately?
do want daisy-chain touch screens?
in separate touch screens
sck of master , 'n' slaves common.
mosi of master , 'n' slaves common.
miso of master , 'n' slaves common.
the master need 'n' ss (slave select) lines
in daisy-chain touch screens
sck of master , 'n' slaves common.
mosi of master , and slave0 mosi connected.
slave0 miso connected slave1 mosi.
slave1 miso connected slaventh mosi
miso of master , nth slave miso connected.
ss of master , 'n' slaves common.
in separate touch screen, each screen must wait polled master.
the slave touch screen cannot send data until selected.
there must agreement on when slave screens polled master.
daisy-chain fine led strips
if data being returned master must shifted through 'n' slaves.
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