From fa296fbc6fe1c423932189116bd0cb949de0beef Mon Sep 17 00:00:00 2001
From: lonkaars <loek@pipeframe.xyz>
Date: Thu, 30 Mar 2023 17:00:05 +0200
Subject: spi not working on hardware

---
 basys3/basys3.srcs/.gitignore                 |   1 +
 basys3/basys3.srcs/makefile                   |   5 +-
 basys3/basys3.srcs/ppu_tb.vhd.m4              |   3 +-
 basys3/basys3.srcs/spi_tb.vhd                 | 607 +++++++++++++++++---------
 basys3/basys3.srcs/spi_tb.vhd.m4              |  47 ++
 basys3/basys3.xpr                             |   2 +-
 src/main.c                                    |  25 +-
 src/ppu/stm.c                                 |   2 +-
 src/stm32/setup.c                             |   2 +-
 test/ppu-stm-integration-demo/data.h          |   4 +-
 test/ppu-stm-integration-demo/data2pputb.awk  |  16 +
 test/ppu-stm-integration-demo/data2spitb.awk  |  20 +
 test/ppu-stm-integration-demo/data2vhdltb.awk |  16 -
 test/ppu-stm-integration-demo/makefile        |   9 +-
 14 files changed, 514 insertions(+), 245 deletions(-)
 create mode 100644 basys3/basys3.srcs/spi_tb.vhd.m4
 create mode 100755 test/ppu-stm-integration-demo/data2pputb.awk
 create mode 100755 test/ppu-stm-integration-demo/data2spitb.awk
 delete mode 100755 test/ppu-stm-integration-demo/data2vhdltb.awk

diff --git a/basys3/basys3.srcs/.gitignore b/basys3/basys3.srcs/.gitignore
index dd85c9b..e541866 100644
--- a/basys3/basys3.srcs/.gitignore
+++ b/basys3/basys3.srcs/.gitignore
@@ -1 +1,2 @@
 ppu_tb.vhd
+spi_tb.vhd
diff --git a/basys3/basys3.srcs/makefile b/basys3/basys3.srcs/makefile
index 61fab40..d37593c 100644
--- a/basys3/basys3.srcs/makefile
+++ b/basys3/basys3.srcs/makefile
@@ -1,4 +1,7 @@
-ppu_tb.vhd: ppu_tb.vhd.m4 ../../test/ppu-stm-integration-demo/test-image.tb.vhd
+all: ppu_tb.vhd spi_tb.vhd
+
+ppu_tb.vhd: ppu_tb.vhd.m4 ../../test/ppu-stm-integration-demo/test-image-ppu.tb.vhd
+spi_tb.vhd: spi_tb.vhd.m4 ../../test/ppu-stm-integration-demo/test-image-spi.tb.vhd
 
 %.vhd: %.vhd.m4
 	m4 -I../../test/ppu-stm-integration-demo/ $< > $@
diff --git a/basys3/basys3.srcs/ppu_tb.vhd.m4 b/basys3/basys3.srcs/ppu_tb.vhd.m4
index 0797c9f..97f0aef 100644
--- a/basys3/basys3.srcs/ppu_tb.vhd.m4
+++ b/basys3/basys3.srcs/ppu_tb.vhd.m4
@@ -1,3 +1,4 @@
+-- vim: ft=vhdl
 library ieee;
 library unisim;
 use ieee.std_logic_1164.all;
@@ -48,7 +49,7 @@ begin
 	
 	process
 	begin
-		-- undivert(`test-image.tb.vhd') -- m4 macro expansion (see makefile)
+		-- undivert(`test-image-ppu.tb.vhd') -- m4 macro expansion (see makefile)
 		wait; -- stop after one loop (process loops in simulator)
 	end process;
 end Behavioral;
diff --git a/basys3/basys3.srcs/spi_tb.vhd b/basys3/basys3.srcs/spi_tb.vhd
index 8e4b8aa..255f38b 100644
--- a/basys3/basys3.srcs/spi_tb.vhd
+++ b/basys3/basys3.srcs/spi_tb.vhd
@@ -1,3 +1,4 @@
+-- vim: ft=vhdl
 library ieee;
 library unisim;
 
@@ -25,7 +26,7 @@ begin
 
 	process
 	begin
-		for i in 0 to 10000 loop
+		while true loop
 			wait for 5 ns;
 			SYSCLK <= '1';
 			wait for 5 ns;
@@ -36,227 +37,397 @@ begin
 
 	process
 	begin
-		for i in 0 to 2 loop
-			-- data = 0b01010110010100001001110011111111 (0x56509cff)
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '0';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-
-			SPI_DATA <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '1';
-			wait for 50 ns;
-			SPI_CLK <= '0';
-		end loop;
+		-- -- 0xdc00: 0f0f
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+--
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '0';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+-- 0xffff: ffff
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+--
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+SPI_DATA <= '1';
+wait for 50 ns;
+SPI_CLK <= '1';
+wait for 50 ns;
+SPI_CLK <= '0';
+
+ -- m4 macro expansion (see makefile)
 
-		wait for 50 ns;
-		SPI_CLK <= '1';
-		wait for 50 ns;
-		SPI_CLK <= '0';
-		wait for 50 ns;
-		SPI_CLK <= '1';
-		wait for 50 ns;
-		SPI_CLK <= '0';
-		wait for 50 ns;
-		SPI_CLK <= '1';
-		wait for 50 ns;
-		SPI_CLK <= '0';
-		wait for 50 ns;
-		SPI_CLK <= '1';
-		wait for 50 ns;
-		SPI_CLK <= '0';
-		wait for 50 ns;
-		SPI_CLK <= '1';
-		wait for 50 ns;
-		SPI_CLK <= '0';
-		wait for 50 ns;
 		RESET <= '1';
 		wait for 50 ns;
 		RESET <= '0';
-
-
 		wait; -- stop for simulator
 	end process;
 end;
diff --git a/basys3/basys3.srcs/spi_tb.vhd.m4 b/basys3/basys3.srcs/spi_tb.vhd.m4
new file mode 100644
index 0000000..cf76b2c
--- /dev/null
+++ b/basys3/basys3.srcs/spi_tb.vhd.m4
@@ -0,0 +1,47 @@
+-- vim: ft=vhdl
+library ieee;
+library unisim;
+
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use unisim.vcomponents.all;
+use work.ppu_consts.all;
+
+entity spi_tb is
+end spi_tb;
+
+architecture behavioral of spi_tb is
+	signal SYSCLK : std_logic := '0';
+	signal SPI_CLK : std_logic := '0';
+	signal SPI_DATA : std_logic := '0';
+	signal RESET : std_logic := '0';
+begin
+	uut : entity work.spi port map(
+		SYSCLK => SYSCLK,
+		RESET => RESET,
+		DO => open,
+		DI => SPI_DATA,
+		DCK => SPI_CLK,
+		WEN => open);
+
+	process
+	begin
+		while true loop
+			wait for 5 ns;
+			SYSCLK <= '1';
+			wait for 5 ns;
+			SYSCLK <= '0';
+		end loop;
+		wait; -- stop for simulator
+	end process;
+
+	process
+	begin
+		-- undivert(`test-background-color-spi.tb.vhd') -- m4 macro expansion (see makefile)
+
+		RESET <= '1';
+		wait for 50 ns;
+		RESET <= '0';
+		wait; -- stop for simulator
+	end process;
+end;
diff --git a/basys3/basys3.xpr b/basys3/basys3.xpr
index 19bbeec..f90ecdb 100644
--- a/basys3/basys3.xpr
+++ b/basys3/basys3.xpr
@@ -60,7 +60,7 @@
     <Option Name="IPStaticSourceDir" Val="$PIPUSERFILESDIR/ipstatic"/>
     <Option Name="EnableBDX" Val="FALSE"/>
     <Option Name="DSABoardId" Val="basys3"/>
-    <Option Name="WTXSimLaunchSim" Val="108"/>
+    <Option Name="WTXSimLaunchSim" Val="118"/>
     <Option Name="WTModelSimLaunchSim" Val="0"/>
     <Option Name="WTQuestaLaunchSim" Val="0"/>
     <Option Name="WTIesLaunchSim" Val="0"/>
diff --git a/src/main.c b/src/main.c
index 658fc94..d8191b6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -12,7 +12,30 @@ void hh_ppu_vblank_interrupt() {
 #ifdef HH_TARGET_DESKTOP
 	if (g_hh_test_complete) return;
 #endif
-	hh_ppu_vram_dwrite((uint8_t*) HH_PPUINTDEMO_ARR, HH_PPUINTDEMO_LENGTH);
+	// // uint8_t test[4] = { 0x0f, 0x0f, 0xf0, 0xf0 };
+	// uint8_t* test = malloc(4);
+	// test[0] = 0x00;
+	// test[1] = 0x00;
+	// test[2] = 0x00;
+	// test[3] = 0x00;
+	// while (1)
+	// 	hh_ppu_vram_dwrite(test, 4);
+	// return;
+	if (1) {
+		hh_ppu_vram_dwrite((uint8_t*) HH_PPUINTDEMO_ARR, HH_PPUINTDEMO_LENGTH);
+	}
+	if (0) {
+		for (size_t i = 0; i < HH_PPUINTDEMO_LENGTH; i += 4) {
+			if (i+4 > HH_PPUINTDEMO_LENGTH) break;
+			uint8_t test[4] = {
+				HH_PPUINTDEMO_ARR[i+0],
+				HH_PPUINTDEMO_ARR[i+1],
+				HH_PPUINTDEMO_ARR[i+2],
+				HH_PPUINTDEMO_ARR[i+3],
+			};
+			hh_ppu_vram_dwrite(test, 4);
+		}
+	}
 	g_hh_test_complete = true;
 }
 
diff --git a/src/ppu/stm.c b/src/ppu/stm.c
index 18811cf..8292d3c 100644
--- a/src/ppu/stm.c
+++ b/src/ppu/stm.c
@@ -9,7 +9,7 @@ void hh_ppu_deinit() {}
 
 void hh_ppu_vram_dwrite(uint8_t* data, size_t size) {
 	HAL_SPI_Transmit(&hspi1, data, size, HAL_MAX_DELAY);
-	HAL_SPI_Transmit(&hspi1, (uint8_t[4]) { 0xff, 0xff, 0xff, 0xff }, 4, HAL_MAX_DELAY);
+	// reset SPI
 	HAL_GPIO_WritePin(GPIOA, GPIO_PIN_9, true);
 	HAL_GPIO_WritePin(GPIOA, GPIO_PIN_9, false);
 }
diff --git a/src/stm32/setup.c b/src/stm32/setup.c
index b4112d3..b0abe7a 100644
--- a/src/stm32/setup.c
+++ b/src/stm32/setup.c
@@ -133,7 +133,6 @@ void hh_io_gpio_setup() {
   __HAL_RCC_GPIOA_CLK_ENABLE();
   __HAL_RCC_GPIOB_CLK_ENABLE();
 
-  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_9, GPIO_PIN_SET);
 	HAL_GPIO_Init(GPIOA, &(GPIO_InitTypeDef) {
 		.Pin = GPIO_PIN_9,
 		.Mode = GPIO_MODE_OUTPUT_PP,
@@ -165,6 +164,7 @@ void HAL_SPI_MspDeInit(SPI_HandleTypeDef* hspi) {
   if(hspi->Instance != SPI1) return;
 
 	__HAL_RCC_SPI1_CLK_DISABLE();
+	__HAL_RCC_GPIOA_CLK_DISABLE();
 
 	HAL_GPIO_DeInit(HH_IO_SPI_PORT, HH_IO_SPI_PINS);
 }
diff --git a/test/ppu-stm-integration-demo/data.h b/test/ppu-stm-integration-demo/data.h
index ac73e66..cdca4a5 100644
--- a/test/ppu-stm-integration-demo/data.h
+++ b/test/ppu-stm-integration-demo/data.h
@@ -1,5 +1,5 @@
 #pragma once
 
-// #include "test-image.h"
-#include "test-background-color.h"
+#include "test-image.h"
+// #include "test-background-color.h"
 
diff --git a/test/ppu-stm-integration-demo/data2pputb.awk b/test/ppu-stm-integration-demo/data2pputb.awk
new file mode 100755
index 0000000..db4b53f
--- /dev/null
+++ b/test/ppu-stm-integration-demo/data2pputb.awk
@@ -0,0 +1,16 @@
+#!/bin/awk -f
+BEGIN {
+	printf "\n"
+	printf "\t\tWEN <= '1';\n"
+	printf "\n"
+}
+1 {
+	printf "\t\tADDR <= x\""$1"\";\n"
+	printf "\t\tDATA <= x\""$2"\";\n"
+	printf "\t\twait for 10 ns;\n"
+	printf "\n"
+}
+END {
+	printf "\t\tWEN <= '0';\n"
+	printf "\n"
+}
diff --git a/test/ppu-stm-integration-demo/data2spitb.awk b/test/ppu-stm-integration-demo/data2spitb.awk
new file mode 100755
index 0000000..6caf9a3
--- /dev/null
+++ b/test/ppu-stm-integration-demo/data2spitb.awk
@@ -0,0 +1,20 @@
+#!/bin/awk -f
+BEGIN { }
+
+{
+	data = strtonum("0x"$1$2)
+	print "-- 0x"$1": "$2
+
+	for (i = 0; i < 32; i++) {
+		print "SPI_DATA <= '"and(rshift(data, 31), 1)"';"
+		print "wait for 50 ns;"
+		print "SPI_CLK <= '1';"
+		print "wait for 50 ns;"
+		print "SPI_CLK <= '0';"
+		if (i == 15) print "--"
+		else print ""
+		data = lshift(data, 1)
+	}
+}
+
+END { }
diff --git a/test/ppu-stm-integration-demo/data2vhdltb.awk b/test/ppu-stm-integration-demo/data2vhdltb.awk
deleted file mode 100755
index db4b53f..0000000
--- a/test/ppu-stm-integration-demo/data2vhdltb.awk
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/awk -f
-BEGIN {
-	printf "\n"
-	printf "\t\tWEN <= '1';\n"
-	printf "\n"
-}
-1 {
-	printf "\t\tADDR <= x\""$1"\";\n"
-	printf "\t\tDATA <= x\""$2"\";\n"
-	printf "\t\twait for 10 ns;\n"
-	printf "\n"
-}
-END {
-	printf "\t\tWEN <= '0';\n"
-	printf "\n"
-}
diff --git a/test/ppu-stm-integration-demo/makefile b/test/ppu-stm-integration-demo/makefile
index 2f4b6f4..853dd31 100644
--- a/test/ppu-stm-integration-demo/makefile
+++ b/test/ppu-stm-integration-demo/makefile
@@ -1,14 +1,17 @@
 .PHONY: all clean
 
-TARGETS := test-background-color.h test-image.h test-image.tb.vhd
+TARGETS := test-background-color.h test-image.h test-image-spi.tb.vhd test-image-ppu.tb.vhd test-background-color-spi.tb.vhd
 
 all: $(TARGETS)
 
 %.h: %.txt ./data2test.awk
 	tr -d ':' < $< | ./data2test.awk > $@
 
-test-%.tb.vhd: test-%.txt ./data2vhdltb.awk
-	tr -d ':' < $< | ./data2vhdltb.awk > $@
+test-%-ppu.tb.vhd: test-%.txt ./data2pputb.awk
+	tr -d ':' < $< | ./data2pputb.awk > $@
+
+test-%-spi.tb.vhd: test-%.txt ./data2spitb.awk
+	(tr -d ':' < $<; echo "ffff ffff") | ./data2spitb.awk > $@
 
 clean:
 	$(RM) $(TARGETS)
-- 
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