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display.led.hub75.spin
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display.led.hub75.spin
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{
----------------------------------------------------------------------------------------------------
Filename: display.led.hub75.spin
Description: Driver for HUB75 RGB LED matrix displays
Author: Jesse Burt
Started: Oct 24, 2021
Updated: Aug 19, 2024
Copyright (c) 2024 - See end of file for terms of use.
----------------------------------------------------------------------------------------------------
}
#define MEMMV_NATIVE bytemove
#include "graphics.common.spinh"
#ifdef GFX_DIRECT
# error "GFX_DIRECT not supported by this driver"
#endif
CON
BYTESPERPX = 1
MAX_COLOR = 7
{ default I/O settings - can be overridden by the parent object }
WIDTH = 64
HEIGHT = 32
RGB_BASE = 0
ADDR_BASE = 6
CLK = 10
LAT = 11
BL = 12
XMAX = WIDTH-1
YMAX = HEIGHT-1
CENTERX = WIDTH/2
CENTERY = HEIGHT/2
BPL = WIDTH*BYTESPERPX
VAR
long _eng_stack[50]
long _bl, _clk, _lat
byte _framebuffer[(WIDTH*HEIGHT)]
byte _rgbio, _addr
byte _vsync
byte _cog
OBJ
time : "time"
PUB null()
' This is not a top-level object
PUB start(): status
' Start the driver using default settings
return startx(RGB_BASE, ADDR_BASE, BL, CLK, LAT, WIDTH, HEIGHT, @_framebuffer)
PUB startx(RGB_BASEPIN, ADDR_BASEPIN, BLPIN, CLKPIN, LATPIN, DISP_W, DISP_H, PTR_DISP=0): status
' Start using custom I/O settings
' RGB_BASEPIN: starting (lowest) pin of 6 contiguous RGB data pins
' (LSB..MSB: R0, G0, B0, R1, G1, B1)
' ADDR_BASEPIN: starting (lowest) pin of 4 contiguous address pins
' (LSB..MSB: A, B, C, D)
' _____ __
' BLPIN: blank control pin (sometimes labelled as OE)
' CLKPIN: clock pin
' LATPIN: latch pin
' WIDTH, HEIGHT: dimensions of RGB matrix display, in pixels
' PTR_DISP: pointer to display buffer
' (must be at least (WIDTH * HEIGHT) bytes)
if ( lookdown(RGB_BASEPIN: 0..25) and lookdown(ADDR_BASEPIN: 0..27) and ...
lookdown(BLPIN: 0..31) and lookdown(CLKPIN: 0..31) and lookdown(LATPIN: 0..31) )
if ( _cog := status := (cognew(hub75_engine(), @_eng_stack) + 1) )
set_dims(DISP_W, DISP_H)
_rgbio := RGB_BASEPIN
_addr := ADDR_BASEPIN
longmove(@_bl, @BLPIN, 3)
set_address(PTR_DISP)
return
' if this point is reached, something above failed
' Double check I/O pin assignments, connections, power
' Lastly - make sure you have at least one free core/cog
return FALSE
PUB stop()
' Stop engine, clear variable space
if ( _cog )
cogstop(_cog-1)
longfill(@_eng_stack, 0, 54)
wordfill(@_disp_width, 0, 6)
bytefill(@_rgbio, 0, 4)
#ifndef GFX_DIRECT
PUB clear()
' Clear the display buffer
bytefill(_ptr_drawbuffer, _bgcolor, _buff_sz)
#endif
PUB plot(x, y, color) | tmp
' Plot pixel at (x, y) in color
if ( (x < 0) or (x > _disp_xmax) or (y < 0) or (y > _disp_ymax) )
return ' coords out of bounds, ignore
#ifdef GFX_DIRECT
' direct to display
' (not implemented)
#else
' buffered display
byte[_ptr_drawbuffer][x + (y * _disp_width)] := color
#endif
#ifndef GFX_DIRECT
PUB point(x, y): pix_clr
' Get color of pixel at x, y
x := 0 #> x <# _disp_xmax
y := 0 #> y <# _disp_ymax
return byte[_ptr_drawbuffer][x + (y * _disp_width)]
#endif
PUB show()
' dummy method for compatibility with other drivers
PRI hub75_engine() | r0, g0, b0, r1, g1, b1, a, b, c, d, bl, clk, lat, tmp, y, x, ty_offs, ...
by_offs, top_offs, bot_offs, bnkht
' HUB75 engine (secondary cog)
repeat until _lat ' wait until all vars are set
repeat tmp from 0 to 5 ' copy hub I/O pin vars to
long[@r0][tmp] := _rgbio+tmp ' locals
repeat tmp from 0 to 3 '
long[@a][tmp] := _addr+tmp '
longmove(@bl, @_bl, 3) '
bnkht := _disp_height/2 ' bank (top/bot half) height
dira[bl..r0] := %1111111111111 ' init I/O pins outputs, and
outa[b1..r0] := 0 ' inactive
outa[d..a] := 0
outa[bl] := 1
outa[clk] := 0
outa[lat] := 0
repeat ' main loop
repeat y from 0 to bnkht-1 ' (( Y/row loop ))
outa[_lat] := 0
ty_offs := (y * _disp_width) ' precalc bank row offsets
by_offs := ((y + bnkht) * _disp_width)
outa[bl] := 1 ' turn off output
outa[d..a] := y ' set row address
repeat x from 0 to _disp_xmax ' (( X/column loop ))
top_offs := (ty_offs + x) ' calc top and bottom bank
bot_offs := (by_offs + x) ' offsets
outa[b1..r0] := ( byte[_ptr_drawbuffer][bot_offs] << 3) | ...
byte[_ptr_drawbuffer][top_offs] ' output the pixel data
outa[clk] := 1 ' clock it out
outa[clk] := 0
outa[lat] := 1 ' latch the data shifted in
outa[bl] := 0 ' unblank the display
' time.usleep(1)
#ifndef GFX_DIRECT
PRI memfill(xs, ys, val, count)
' Fill region of display buffer memory
' xs, ys: Start of region
' val: Color
' count: Number of consecutive memory locations to write
bytefill(_ptr_drawbuffer + (xs + (ys * _bytesperln)), val, count)
#endif
DAT
{
Copyright 2024 Jesse Burt
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
}