view libftmini/eeprom_wr.c @ 39:b9ecfa54fe2b

fc-duart28-conf: replace find and check-eeprom with single show command The original design with separate find and check-eeprom commands was driven by the assumption that we had to bump off the ftdi_sio driver in order to read the EEPROM, while a USB device tree check could be done non-invasively. However, now that we know that we can read the EEPROM non-invasively too, we can simplify the tool with a single show command.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 10 Sep 2023 19:21:20 +0000
parents fce3d4baa2b4
children
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/* elementary FTDI EEPROM write 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"

void ftmini_write_eeprom_loc(usb_dev_handle *usbh, u_short addr, u_short val)
{
	int rc;

	rc = usb_control_msg(usbh, FTDI_DEVICE_OUT_REQTYPE,
			     SIO_WRITE_EEPROM_REQUEST, val, addr, NULL, 0,
			     USB_WRITE_TIMEOUT);
	if (rc != 0) {
		fprintf(stderr,
			"EEPROM write error: usb_control_msg() returned %d\n",
			rc);
		exit(1);
	}
}