From 0d84f5e512c4148bc45dd26eea177e09c0a21b56 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Thu, 11 Jan 2018 14:23:07 +0100
Subject: Add Sharp96 display driver, split up msp430 SPI into a1 / b

---
 src/driver/sharp96.cc | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 src/driver/sharp96.cc

(limited to 'src/driver')

diff --git a/src/driver/sharp96.cc b/src/driver/sharp96.cc
new file mode 100644
index 0000000..1e9a2ec
--- /dev/null
+++ b/src/driver/sharp96.cc
@@ -0,0 +1,80 @@
+#include "driver/sharp96.h"
+#include "driver/spi_b.h"
+#include "driver/gpio.h"
+
+#ifndef SHARP96_POWER_PIN
+#error makeflag sharp96_power_pin required
+#endif
+
+#ifndef SHARP96_EN_PIN
+#error makeflag sharp96_en_pin required
+#endif
+
+#ifndef SHARP96_CS_PIN
+#error makeflag sharp96_cs_pin required
+#endif
+
+#define CMD_WRITE_LINE 0x80
+#define CMD_TOGGLE_VCOM 0x40
+#define CMD_CLEAR_SCREEN 0x20
+
+void Sharp96::setup()
+{
+	gpio.output(SHARP96_POWER_PIN);
+	gpio.output(SHARP96_EN_PIN);
+	gpio.output(SHARP96_CS_PIN);
+}
+
+void Sharp96::powerOn()
+{
+	gpio.write(SHARP96_POWER_PIN, 1);
+	gpio.write(SHARP96_EN_PIN, 1);
+}
+
+void Sharp96::powerOff()
+{
+	gpio.write(SHARP96_EN_PIN, 0);
+	gpio.write(SHARP96_POWER_PIN, 0);
+}
+
+unsigned char Sharp96::swap_bits(unsigned char byte)
+{
+	byte = (byte & 0xF0) >> 4 | (byte & 0x0F) << 4;
+	byte = (byte & 0xCC) >> 2 | (byte & 0x33) << 2;
+	byte = (byte & 0xAA) >> 1 | (byte & 0x55) << 1;
+	return byte;
+}
+
+void Sharp96::clear()
+{
+	gpio.write(SHARP96_CS_PIN, 1);
+	txbuf[0] = CMD_CLEAR_SCREEN | (CMD_TOGGLE_VCOM * vcom);
+	txbuf[1] = 0;
+	spi.xmit(2, txbuf, 0, txbuf);
+	gpio.write(SHARP96_CS_PIN, 0);
+}
+
+void Sharp96::writeLine(unsigned char line_no, unsigned char* data)
+{
+	txbuf[0] = CMD_WRITE_LINE | (CMD_WRITE_LINE * vcom);
+	txbuf[1] = swap_bits(line_no + 1);
+	gpio.write(SHARP96_CS_PIN, 1);
+	spi.xmit(2, txbuf, 0, txbuf);
+	spi.xmit(12, data, 0, txbuf);
+	txbuf[0] = 0;
+	txbuf[1] = 0;
+	spi.xmit(2, txbuf, 0, txbuf);
+	gpio.write(SHARP96_CS_PIN, 0);
+}
+
+void Sharp96::toggleVCOM()
+{
+	vcom = !vcom;
+	txbuf[0] = CMD_TOGGLE_VCOM * vcom;
+	txbuf[1] = 0;
+	gpio.write(SHARP96_CS_PIN, 1);
+	spi.xmit(2, txbuf, 0, txbuf);
+	gpio.write(SHARP96_CS_PIN, 0);
+}
+
+Sharp96 sharp96;
-- 
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