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| -rw-r--r-- | display/st7735/README | 39 | ||||
| -rw-r--r-- | display/st7735/st7735.sr | bin | 0 -> 54844 bytes |
2 files changed, 39 insertions, 0 deletions
diff --git a/display/st7735/README b/display/st7735/README new file mode 100644 index 0000000..0c76111 --- /dev/null +++ b/display/st7735/README @@ -0,0 +1,39 @@ +------------------------------------------------------------------------------- +ST7735 TFT display controller, 4-wire SPI +------------------------------------------------------------------------------- + +This capture contains ST7735 TFT display controller communication which is +popular for small (1.44", 1.8") 16-bit color display modules. The protocol +of these modules is based on SPI, but unlike typical SPI has no MISO and uses +two additional pins called RES (reset) and DC (data / command). + +Details: +https://cdn-shop.adafruit.com/datasheets/ST7735.pdf +https://github.com/adafruit/Adafruit-ST7735-Library + + +Logic analyzer setup +-------------------- + +The 1.44" 128x128 px module was driven by Arduino Uno and Adafruit ST7735 +library. The capture was taken with 8 channel noname Saleae logic analyzer +clone, sampling 5 logic channels at a rate of 24MHz: + + Probe ST7735 + ------------------ + 0 CS (chip select) + 1 RES (reset) + 2 DC (data / command) + 3 MOSI (master out, slave in) + 4 SCLK (clock) + + +Data +---- + +This is a minimal capture despite the fact that it might look otherwise. It +contains an initialization of a display and filling it with one complete frame. +Long pauses are caused be sleeps for a few hundreds of milliseconds, which are +required by the spec. Other oddities like frequent changes of CS are caused by +specific library implementation. + diff --git a/display/st7735/st7735.sr b/display/st7735/st7735.sr Binary files differnew file mode 100644 index 0000000..2997af3 --- /dev/null +++ b/display/st7735/st7735.sr |