# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1694073549 0
# Node ID 67ecb394b24fd88fccf99510d5341faf354e32f4
# Parent  c53dee063cddd176161b29cedebd73015e538be4
libftmini: starting with EEPROM read

diff -r c53dee063cdd -r 67ecb394b24f libftmini/Makefile
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libftmini/Makefile	Thu Sep 07 07:59:09 2023 +0000
@@ -0,0 +1,13 @@
+CC=	gcc
+CFLAGS=	-O2
+OBJS=	eeprom_rd.o
+LIB=	libftmini.a
+
+all:	${LIB}
+
+${LIB}:	${OBJS}
+	ar rcu $@ ${OBJS}
+	ranlib $@
+
+clean:
+	rm -f *.[oa] errs
diff -r c53dee063cdd -r 67ecb394b24f libftmini/eeprom_func.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libftmini/eeprom_func.h	Thu Sep 07 07:59:09 2023 +0000
@@ -0,0 +1,5 @@
+/* declarations for libftmini EEPROM operation functions */
+
+u_short ftmini_read_eeprom_loc(usb_dev_handle *usbh, u_short addr);
+void ftmini_write_eeprom_loc(usb_dev_handle *usbh, u_short addr, u_short val);
+void ftmini_erase_eeprom(usb_dev_handle *usbh);
diff -r c53dee063cdd -r 67ecb394b24f libftmini/eeprom_rd.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libftmini/eeprom_rd.c	Thu Sep 07 07:59:09 2023 +0000
@@ -0,0 +1,26 @@
+/* elementary FTDI EEPROM read function */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <usb.h>
+#include "ftdi_defs.h"
+#include "ftdi_tune.h"
+#include "eeprom_func.h"
+
+u_short ftmini_read_eeprom_loc(usb_dev_handle *usbh, u_short addr)
+{
+	u_char buf[2];
+	int rc;
+
+	rc = usb_control_msg(usbh, FTDI_DEVICE_IN_REQTYPE,
+			     SIO_READ_EEPROM_REQUEST, 0, addr, (char *) buf, 2,
+			     USB_READ_TIMEOUT);
+	if (rc != 2) {
+		fprintf(stderr,
+			"EEPROM read error: usb_control_msg() returned %d\n",
+			rc);
+		exit(1);
+	}
+	return buf[0] | (buf[1] << 8);
+}
diff -r c53dee063cdd -r 67ecb394b24f libftmini/ftdi_tune.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libftmini/ftdi_tune.h	Thu Sep 07 07:59:09 2023 +0000
@@ -0,0 +1,7 @@
+/*
+ * libftdi-0.20 passes ftdi->usb_read_timeout as the last argument to
+ * usb_control_msg(); this setting is initialized to 5000 in ftdi_init()
+ * and never changed in practice.  Replicate this magic definition.
+ */
+
+#define	USB_READ_TIMEOUT	5000