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comparison libftmini/eeprom_rd.c @ 14:67ecb394b24f

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libftmini: starting with EEPROM read
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 07 Sep 2023 07:59:09 +0000
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13:c53dee063cdd 14:67ecb394b24f
1 /* elementary FTDI EEPROM read function */
2
3 #include <sys/types.h>
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <usb.h>
7 #include "ftdi_defs.h"
8 #include "ftdi_tune.h"
9 #include "eeprom_func.h"
10
11 u_short ftmini_read_eeprom_loc(usb_dev_handle *usbh, u_short addr)
12 {
13 u_char buf[2];
14 int rc;
15
16 rc = usb_control_msg(usbh, FTDI_DEVICE_IN_REQTYPE,
17 SIO_READ_EEPROM_REQUEST, 0, addr, (char *) buf, 2,
18 USB_READ_TIMEOUT);
19 if (rc != 2) {
20 fprintf(stderr,
21 "EEPROM read error: usb_control_msg() returned %d\n",
22 rc);
23 exit(1);
24 }
25 return buf[0] | (buf[1] << 8);
26 }