From 36928bb57ae74e96e7cd93edfd208d162e0592e1 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Sat, 8 Sep 2012 15:59:41 +0200
Subject: Led matrix test.

---
 .gdbinit    | 23 ++++++++++++++++
 .gitignore  |  5 ++++
 .gitmodules |  3 +++
 SConstruct  | 11 ++++++++
 laks        |  1 +
 main.cpp    | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 132 insertions(+)
 create mode 100644 .gdbinit
 create mode 100644 .gitignore
 create mode 100644 .gitmodules
 create mode 100644 SConstruct
 create mode 160000 laks
 create mode 100644 main.cpp

diff --git a/.gdbinit b/.gdbinit
new file mode 100644
index 0000000..2844d70
--- /dev/null
+++ b/.gdbinit
@@ -0,0 +1,23 @@
+define flash
+file demo.elf
+load
+end
+
+define restart
+run
+end
+
+define attach_swd
+mon swdp_scan
+attach 1
+end
+
+define attach_jtag
+mon jtag_scan
+attach 1
+end
+
+file demo.elf
+target extended-remote /dev/cu.usbmodem7FC181B1
+
+set mem inaccessible-by-default off
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b137a4a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+*.o
+*.a
+*.elf
+*.swp
+.sconsign.dblite
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..cd4f3c2
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "laks"]
+	path = laks
+	url = git://git.jvnv.net/laks.git
diff --git a/SConstruct b/SConstruct
new file mode 100644
index 0000000..ff0e6ce
--- /dev/null
+++ b/SConstruct
@@ -0,0 +1,11 @@
+import os
+
+env = Environment(
+	ENV = os.environ,
+)
+
+SConscript('laks/build_rules')
+
+env.SelectMCU('stm32f407zg')
+
+env.Firmware('demo.elf', Glob('*.cpp'))
diff --git a/laks b/laks
new file mode 160000
index 0000000..9ae9159
--- /dev/null
+++ b/laks
@@ -0,0 +1 @@
+Subproject commit 9ae91599772ee81d352014a8ff293c5feec0439b
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..eab4e69
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,89 @@
+#include <rcc/rcc.h>
+#include <gpio/pin.h>
+#include <spi/spi.h>
+#include <os/time.h>
+
+Pin& noe   = PA3;
+Pin& vsync = PA4;
+Pin& clk   = PA5; // SCK
+Pin& hsync = PA6; 
+Pin& data  = PA7; // MOSI
+
+inline void nopdelay(uint32_t iterations) {
+	while(iterations--) {
+		asm volatile("nop");
+	}
+}
+
+uint32_t buf[] = {
+	0b1001010100000000,
+	0b1001010100000000,
+	0b1111010100000000,
+	0b1001010000000000,
+	0b1001010100000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+	0b0000000000000000,
+};
+
+int main() {
+	// Initialize system timer.
+	STK.LOAD = 168000000 / 8 / 1000; // 1000 Hz.
+	STK.CTRL = 0x03;
+	
+	RCC.enable(RCC.GPIOA);
+	RCC.enable(RCC.SPI1);
+	
+	noe.set_mode(Pin::Output);
+	noe.off();
+	
+	hsync.set_mode(Pin::Output);
+	hsync.off();
+	
+	vsync.set_mode(Pin::Output);
+	vsync.on();
+	
+	clk.set_mode(Pin::AF);
+	clk.set_af(5);
+	
+	data.set_mode(Pin::AF);
+	data.set_af(5);
+	
+	SPI1.reg.CR1 = 0xbfc;
+	
+	uint32_t row = 0;
+	
+	while(1) {
+		// Shift out a row.
+		SPI1.reg.DR = buf[row];
+		while(!(SPI1.reg.SR & 0x01));
+		(void)SPI1.reg.DR;
+		
+		// Assert vsync if this is first row.
+		if(row == 0) {
+			vsync.off();
+		}
+		
+		// Strobe hsync.
+		hsync.on();
+		nopdelay(10);
+		hsync.off();
+		
+		// Deassert vsync.
+		if(row == 0) {
+			vsync.on();
+		}
+		
+		Time::sleep(1);
+		
+		row = (row + 1) & 0xf;
+	}
+}
-- 
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