--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fpga/common/icestick-mcsi.pcf	Fri Oct 11 18:36:25 2024 +0000
@@ -0,0 +1,28 @@
+# Pin Constraint File for the HK1X FPGA as wired on the Icestick board,
+# adapted for FCDEV3B MCSI application.
+
+# Board essentials
+set_io	CLK12		21
+set_io	LED1		99
+set_io	LED2		98
+set_io	LED3		97
+set_io	LED4		96
+set_io	LED5		95
+
+# FT2232H UART channel, signal names are from FT2232H DTE perspective,
+# the logic in the FPGA has to act as DCE.
+
+set_io	UART_TxD	9
+set_io	UART_RxD	8
+set_io	UART_RTS	7
+set_io	UART_CTS	4
+set_io	UART_DTR	3
+set_io	UART_DSR	2
+set_io	UART_DCD	1
+
+# Calypso MCSI connection on J1 header pins, pinout chosen to match FCDEV3B.
+
+set_io	MCSI_CLK	115
+set_io	MCSI_RXD	114
+set_io	MCSI_TXD	113
+set_io	MCSI_FSYNCH	112