FreeCalypso > hg > fc-usbser-tools
view libftmini/eeprom_rd.c @ 83:b3989befca98
doc/CP2102-EEPROM-format: list maximum lengths of textual strings
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 27 Sep 2023 17:40:04 +0000 |
parents | 67ecb394b24f |
children |
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/* 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); }