FreeCalypso > hg > fc-usbser-tools
diff libftmini/eeprom_rd.c @ 14:67ecb394b24f
libftmini: starting with EEPROM read
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 07 Sep 2023 07:59:09 +0000 |
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--- /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); +}