From c2b0687e7ba7ab12f7ab6d0ee55e006f460babb7 Mon Sep 17 00:00:00 2001
From: Russell Harmon <eatnumber1@google.com>
Date: Sun, 14 Jun 2020 09:16:49 +0000
Subject: [PATCH] Set fast output on HDMI_TX pins.

Also adjust timing constraits to reflect working state with line3x at
162 MHz.
---
 ossc.qsf       | 14 ++++++++++++++
 ossc.sdc       |  8 ++++----
 tools/Makefile | 23 +++++++++++++++++++++++
 3 files changed, 41 insertions(+), 4 deletions(-)
 create mode 100644 tools/Makefile

diff --git a/ossc.qsf b/ossc.qsf
index 28bc576..7f11f6a 100644
--- a/ossc.qsf
+++ b/ossc.qsf
@@ -240,4 +240,18 @@ set_global_assignment -name SDC_FILE ossc.sdc
 set_global_assignment -name CDF_FILE output_files/Chain1.cdf
 set_global_assignment -name SIGNALTAP_FILE output_files/ossc_la.stp
 set_global_assignment -name QIP_FILE rtl/char_array.qip
+set_instance_assignment -name FAST_OUTPUT_ENABLE_REGISTER ON -to HDMI_TX_DE
+set_instance_assignment -name FAST_OUTPUT_ENABLE_REGISTER ON -to HDMI_TX_HS
+set_instance_assignment -name FAST_OUTPUT_ENABLE_REGISTER ON -to HDMI_TX_PCLK
+set_instance_assignment -name FAST_OUTPUT_ENABLE_REGISTER ON -to HDMI_TX_VS
+set_instance_assignment -name FAST_OUTPUT_ENABLE_REGISTER ON -to HDMI_TX_BD
+set_instance_assignment -name FAST_OUTPUT_ENABLE_REGISTER ON -to HDMI_TX_GD
+set_instance_assignment -name FAST_OUTPUT_ENABLE_REGISTER ON -to HDMI_TX_RD
+set_instance_assignment -name FAST_OUTPUT_REGISTER ON -to HDMI_TX_DE
+set_instance_assignment -name FAST_OUTPUT_REGISTER ON -to HDMI_TX_HS
+set_instance_assignment -name FAST_OUTPUT_REGISTER ON -to HDMI_TX_PCLK
+set_instance_assignment -name FAST_OUTPUT_REGISTER ON -to HDMI_TX_VS
+set_instance_assignment -name FAST_OUTPUT_REGISTER ON -to HDMI_TX_BD
+set_instance_assignment -name FAST_OUTPUT_REGISTER ON -to HDMI_TX_GD
+set_instance_assignment -name FAST_OUTPUT_REGISTER ON -to HDMI_TX_RD
 set_instance_assignment -name PARTITION_HIERARCHY root_partition -to | -section_id Top
\ No newline at end of file
diff --git a/ossc.sdc b/ossc.sdc
index 3d3d83c..788c142 100644
--- a/ossc.sdc
+++ b/ossc.sdc
@@ -10,8 +10,8 @@ set_false_path -to {sys:sys_inst|sys_pio_1:pio_1|readdata*}
 ### Scanconverter clock constraints ###
 
 create_clock -period 108MHz -name pclk_1x [get_ports PCLK_in]
-create_clock -period 33MHz -name pclk_2x_source [get_ports PCLK_in] -add
-create_clock -period 33MHz -name pclk_3x_source [get_ports PCLK_in] -add
+create_clock -period 54MHz -name pclk_2x_source [get_ports PCLK_in] -add
+create_clock -period 54MHz -name pclk_3x_source [get_ports PCLK_in] -add
 create_clock -period 33MHz -name pclk_4x_source [get_ports PCLK_in] -add
 create_clock -period 33MHz -name pclk_5x_source [get_ports PCLK_in] -add
 
@@ -54,8 +54,8 @@ foreach_in_collection c [get_clocks "pclk_1x pclk_*_source"] {
 }
 
 # output delay constraints
-set IT_Tsu 1.0
-set IT_Th -0.5
+set IT_Tsu 1.5
+set IT_Th -0.3
 set critoutputs_hdmi [get_ports {HDMI_TX_RD* HDMI_TX_GD* HDMI_TX_BD* HDMI_TX_DE HDMI_TX_HS HDMI_TX_VS}]
 foreach_in_collection c [get_clocks pclk_*_out] {
     set_output_delay -clock $c -min $IT_Th $critoutputs_hdmi -add
diff --git a/tools/Makefile b/tools/Makefile
new file mode 100644
index 0000000..ac98ffd
--- /dev/null
+++ b/tools/Makefile
@@ -0,0 +1,23 @@
+.PHONY: generate_hex update_mif generate_firmware assemble_ossc
+
+all: generate_firmware
+
+generate_hex: bin2hex
+	$(MAKE) -C ../software/sys_controller generate_hex
+
+update_mif: generate_hex
+	cd .. && quartus_cdb ossc --update_mif
+
+assemble_ossc: update_mif
+	cd .. && quartus_asm ossc
+
+generate_firmware: assemble_ossc create_fw_img
+	./create_fw_img ../output_files/ossc.rbf 0.86 aud-psp
+
+bin2hex: bin2hex.c
+	$(CC) bin2hex.c -o bin2hex
+
+create_fw_img: create_fw_img.c
+	gcc create_fw_img.c -o create_fw_img
+
+# vim: set noet ts=2 sw=2 sts=2