FreeCalypso > hg > fc-usbser-tools

changeset 22:4e5c8ac4d508

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libftmini: add function for FT232R magic
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 09 Sep 2023 01:06:43 +0000
parents af801ab43a33
children 7e6dcceb5ee8
files libftmini/Makefile libftmini/eeprom_func.h libftmini/ft232r_magic.c
diffstat 3 files changed, 52 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/libftmini/Makefile	Fri Sep 08 23:47:50 2023 +0000
+++ b/libftmini/Makefile	Sat Sep 09 01:06:43 2023 +0000
@@ -1,6 +1,6 @@
 CC=	gcc
 CFLAGS=	-O2
-OBJS=	eeprom_erase.o eeprom_rd.o eeprom_wr.o
+OBJS=	eeprom_erase.o eeprom_rd.o eeprom_wr.o ft232r_magic.o
 LIB=	libftmini.a
 
 all:	${LIB}
--- a/libftmini/eeprom_func.h	Fri Sep 08 23:47:50 2023 +0000
+++ b/libftmini/eeprom_func.h	Sat Sep 09 01:06:43 2023 +0000
@@ -3,3 +3,5 @@
 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);
+
+void ft232r_eeprom_magic(usb_dev_handle *usbh);
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libftmini/ft232r_magic.c	Sat Sep 09 01:06:43 2023 +0000
@@ -0,0 +1,49 @@
+/*
+ * Programming of FT232R internal EEPROM requires a special magic sequence
+ * of non-EEPROM-specific commands to be issued prior to actual EEPROM write
+ * commands.  This module implements this magic command sequence.
+ */
+
+#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"
+
+void ft232r_eeprom_magic(usb_dev_handle *usbh)
+{
+	u_char buf[2];
+	int rc;
+
+	/* equivalent of ftdi_usb_reset() */
+	rc = usb_control_msg(usbh, FTDI_DEVICE_OUT_REQTYPE, SIO_RESET_REQUEST,
+			     SIO_RESET_SIO, 0, NULL, 0, USB_WRITE_TIMEOUT);
+	if (rc != 0) {
+		fprintf(stderr,
+			"ftdi_usb_reset error: usb_control_msg() returned %d\n",
+			rc);
+		exit(1);
+	}
+	/* equivalent of ftdi_poll_modem_status() */
+	rc = usb_control_msg(usbh, FTDI_DEVICE_IN_REQTYPE,
+			     SIO_POLL_MODEM_STATUS_REQUEST, 0, 0, (char *) buf,
+			     2, USB_READ_TIMEOUT);
+	if (rc != 2) {
+		fprintf(stderr,
+		"ftdi_poll_modem_status error: usb_control_msg() returned %d\n",
+			rc);
+		exit(1);
+	}
+	/* equivalent of ftdi_set_latency_timer() */
+	rc = usb_control_msg(usbh, FTDI_DEVICE_OUT_REQTYPE,
+			     SIO_SET_LATENCY_TIMER_REQUEST, 0x77, 0, NULL, 0,
+			     USB_WRITE_TIMEOUT);
+	if (rc != 0) {
+		fprintf(stderr,
+		"ftdi_set_latency_timer error: usb_control_msg() returned %d\n",
+			rc);
+		exit(1);
+	}
+}