From f7966df39849bfc0c6954d058a621da0d58335e0 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 11 Apr 2021 09:37:25 +0200
Subject: examples/ssd1306: add support for 128x32 displays

---
 commandline/examples/ssd1306-getpixels |  5 ++---
 commandline/examples/ssd1306-init      | 12 +++++++++---
 commandline/examples/ssd1306-show      |  6 +++---
 3 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/commandline/examples/ssd1306-getpixels b/commandline/examples/ssd1306-getpixels
index 8527b7a..ba3e2b3 100755
--- a/commandline/examples/ssd1306-getpixels
+++ b/commandline/examples/ssd1306-getpixels
@@ -3,9 +3,6 @@
 from PIL import Image
 import sys
 
-buf_w = 128
-buf_h = 64
-
 
 def load_image(filename):
     im = Image.open(filename)
@@ -20,6 +17,8 @@ def load_image(filename):
 
 filename = sys.argv[1]
 offset = int(sys.argv[2])
+buf_w = int(sys.argv[3])
+buf_h = int(sys.argv[4])
 
 buf = load_image(filename)
 buf = buf[offset : offset + 128]
diff --git a/commandline/examples/ssd1306-init b/commandline/examples/ssd1306-init
index 56e77e5..4d587be 100755
--- a/commandline/examples/ssd1306-init
+++ b/commandline/examples/ssd1306-init
@@ -3,8 +3,14 @@
 WR_CMD=0x80
 WR_DATA=0x40
 
-WIDTH=128
-HEIGHT=64
+: ${WIDTH:=128}
+: ${HEIGHT:=64}
+
+if [ "${HEIGHT}" = 32 ]; then
+	COM_PIN_CFG=0x02
+else
+	COM_PIN_CFG=0x12
+fi
 
 SET_CONTRAST=0x81
 SET_ENTIRE_ON=0xa4
@@ -32,7 +38,7 @@ for cmd in $SET_DISP_OFF \
 		$SET_MUX_RATIO $(( HEIGHT - 1 )) \
 		$SET_COM_OUT_DIR_08 \
 		$SET_DISP_OFFSET 0x00 \
-		$SET_COM_PIN_CFG 0x12 \
+		$SET_COM_PIN_CFG $COM_PIN_CFG \
 		$SET_DISP_CLK_DIV 0x80 \
 		$SET_PRECHARGE 0xf1 \
 		$SET_VCOM_DESEL 0x30 \
diff --git a/commandline/examples/ssd1306-show b/commandline/examples/ssd1306-show
index bac18da..63a63cd 100755
--- a/commandline/examples/ssd1306-show
+++ b/commandline/examples/ssd1306-show
@@ -3,8 +3,8 @@
 WR_CMD=0x80
 WR_DATA=0x40
 
-WIDTH=128
-HEIGHT=64
+: ${WIDTH:=128}
+: ${HEIGHT:=64}
 
 SET_CONTRAST=0x81
 SET_ENTIRE_ON=0xa4
@@ -33,5 +33,5 @@ for cmd in $SET_COL_ADDR 0 $(( WIDTH - 1 )) \
 done
 
 for offset in $(seq 0 7); do
-	vusb-i2cset 0x3c $WR_DATA $("${BASE}/ssd1306-getpixels" "$1" $(( offset * 128 )))
+	vusb-i2cset 0x3c $WR_DATA $("${BASE}/ssd1306-getpixels" "$1" $(( offset * 128 )) "${WIDTH}" "${HEIGHT}")
 done
-- 
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