Led matrix test.led_matrix

6 files changed, 131 insertions, 0 deletions

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
+Subproject 9ae91599772ee81d352014a8ff293c5feec0439
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;
+	}
+}