//
// ch341eeprom programmer version 0.1 (Beta)
//
//  Programming tool for the 24Cxx serial EEPROMs using the Winchiphead CH341A IC
//
// (c) December 2011 asbokid <ballymunboy@gmail.com>
//  (c) August 2023 Mikhail Medvedev <e-ink-reader@yandex.ru>
//   This program is free software: you can redistribute it and/or modify
//   it under the terms of the GNU General Public License as published by
//   the Free Software Foundation, either version 3 of the License, or
//   (at your option) any later version.
//
//   This program is distributed in the hope that it will be useful,
//   but WITHOUT ANY WARRANTY; without even the implied warranty of
//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//   GNU General Public License for more details.
//
//   You should have received a copy of the GNU General Public License
//   along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include <libusb-1.0/libusb.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include "ch341a_i2c.h"

#define dprintf(args...)
// #define dprintf(args...) do { if (1) printf(args); } while(0)

extern struct libusb_device_handle *handle;
unsigned char *readbuf;
uint32_t getnextpkt; // set by the callback function
uint32_t syncackpkt; // synch / ack flag used by BULK OUT cb function
uint32_t byteoffset;

// callback functions for async USB transfers
static void cbBulkIn(struct libusb_transfer *transfer);
static void cbBulkOut(struct libusb_transfer *transfer);

void ch341ReadCmdMarshall(uint8_t *buffer, uint32_t addr, struct EEPROM *eeprom_info)
{
	uint8_t *ptr = buffer;
	uint8_t msb_addr;
	uint32_t size_kb;

	*ptr++ = mCH341A_CMD_I2C_STREAM; // 0
	*ptr++ = mCH341A_CMD_I2C_STM_STA; // 1
	// Write address
	*ptr++ = mCH341A_CMD_I2C_STM_OUT | ((*eeprom_info).addr_size + 1); // 2: I2C bus adddress + EEPROM address
	if ((*eeprom_info).addr_size >= 2) {
		// 24C32 and more
		msb_addr = addr >> 16 & (*eeprom_info).i2c_addr_mask;
		*ptr++ = (EEPROM_I2C_BUS_ADDRESS | msb_addr) << 1; // 3
		*ptr++ = (addr >> 8 & 0xFF); // 4
		*ptr++ = (addr >> 0 & 0xFF); // 5
	} else {
		// 24C16 and less
		msb_addr = addr >> 8 & (*eeprom_info).i2c_addr_mask;
		*ptr++ = (EEPROM_I2C_BUS_ADDRESS | msb_addr) << 1; // 3
		*ptr++ = (addr >> 0 & 0xFF); // 4
	}
	// Read
	*ptr++ = mCH341A_CMD_I2C_STM_STA; // 6/5
	*ptr++ = mCH341A_CMD_I2C_STM_OUT | 1; // 7/6
	*ptr++ = ((EEPROM_I2C_BUS_ADDRESS | msb_addr) << 1) | 1; // 8/7: Read command

	// Configuration?
	*ptr++ = 0xE0; // 9/8
	*ptr++ = 0x00; // 10/9
	if ((*eeprom_info).addr_size < 2)
		*ptr++ = 0x10; // x/10
	memcpy(ptr, "\x00\x06\x04\x00\x00\x00\x00\x00\x00", 9);
	ptr += 9; // 10
	size_kb = (*eeprom_info).size/1024;
	*ptr++ = size_kb & 0xFF; // 19
	*ptr++ = (size_kb >> 8) & 0xFF; // 20
	memcpy(ptr, "\x00\x00\x11\x4d\x40\x77\xcd\xab\xba\xdc", 10);
	ptr += 10;

	// Frame 2
	*ptr++ = mCH341A_CMD_I2C_STREAM;
	memcpy(ptr, "\xe0\x00\x00\xc4\xf1\x12\x00\x11\x4d\x40\x77\xf0\xf1\x12\x00" \
		    "\xd9\x8b\x41\x7e\x00\xe0\xfd\x7f\xf0\xf1\x12\x00\x5a\x88\x41\x7e", 31);
	ptr += 31;

	// Frame 3
	*ptr++ = mCH341A_CMD_I2C_STREAM;
	memcpy(ptr, "\xe0\x00\x00\x2a\x88\x41\x7e\x06\x04\x00\x00\x11\x4d\x40\x77" \
		    "\xe8\xf3\x12\x00\x14\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00", 31);
	ptr += 31;

	// Finalize
	*ptr++ = mCH341A_CMD_I2C_STREAM; // 0xAA
	*ptr++ = 0xDF; // ???
	*ptr++ = mCH341A_CMD_I2C_STM_IN; // 0xC0
	*ptr++ = mCH341A_CMD_I2C_STM_STO; // 0x75
	*ptr++ = mCH341A_CMD_I2C_STM_END; // 0x00

	assert(ptr - buffer == CH341_EEPROM_READ_CMD_SZ);
}
/*
// --------------------------------------------------------------------------
// ch341readEEPROM()
//      read n bytes from device (in packets of 32 bytes)
int32_t ch341readEEPROM(uint8_t *buffer, uint32_t bytestoread, struct EEPROM *eeprom_info)
{
	uint8_t ch341outBuffer[EEPROM_READ_BULKOUT_BUF_SZ];
	uint8_t ch341inBuffer[IN_BUF_SZ]; // 0x100 bytes
	int32_t ret = 0, readpktcount = 0;
	struct libusb_transfer *xferBulkIn, *xferBulkOut;
	struct timeval tv = {0, 100};     // our async polling interval

	xferBulkIn  = libusb_alloc_transfer(0);
	xferBulkOut = libusb_alloc_transfer(0);

	if (!xferBulkIn || !xferBulkOut) {
		printf("Couldnt allocate USB transfer structures\n");
		return -1;
	}

	byteoffset = 0;

	dprintf("Allocated USB transfer structures\n");

	memset(ch341inBuffer, 0, EEPROM_READ_BULKIN_BUF_SZ);
	ch341ReadCmdMarshall(ch341outBuffer, 0, eeprom_info); // Fill output buffer

	libusb_fill_bulk_transfer(xferBulkIn, handle, BULK_READ_ENDPOINT, ch341inBuffer,
		EEPROM_READ_BULKIN_BUF_SZ, cbBulkIn, NULL, DEFAULT_TIMEOUT);

	libusb_fill_bulk_transfer(xferBulkOut, handle, BULK_WRITE_ENDPOINT,
		ch341outBuffer, EEPROM_READ_BULKOUT_BUF_SZ, cbBulkOut, NULL, DEFAULT_TIMEOUT);

	dprintf("Filled USB transfer structures\n");

	libusb_submit_transfer(xferBulkIn);
	dprintf("Submitted BULK IN start packet\n");
	libusb_submit_transfer(xferBulkOut);
	dprintf("Submitted BULK OUT setup packet\n");

	readbuf = buffer;

	while (1) {
		printf("Read %d%% [%d] of [%d] bytes      ", 100 * byteoffset / bytestoread, byteoffset, bytestoread);
		printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
		fflush(stdout);
		ret = libusb_handle_events_timeout(NULL, &tv);

		if (ret < 0 || getnextpkt == -1) {  // indicates an error
			printf("ret from libusb_handle_timeout = %d\n", ret);
			printf("getnextpkt = %d\n", getnextpkt);
			if (ret < 0)
				printf("USB read error : %s\n", strerror(-ret));
			libusb_free_transfer(xferBulkIn);
			libusb_free_transfer(xferBulkOut);
			return -1;
		}
		if (getnextpkt == 1) {   // callback function reports a new BULK IN packet received
			getnextpkt = 0; // reset the flag
			readpktcount++; // increment the read packet counter
			byteoffset += EEPROM_READ_BULKIN_BUF_SZ;
			if (byteoffset == bytestoread)
				break;

			dprintf("\nRe-submitting transfer request to BULK IN endpoint\n");
			libusb_submit_transfer(xferBulkIn); // re-submit request for next BULK IN packet of EEPROM data
			if (syncackpkt)
				syncackpkt = 0;
			// if 4th packet received, we are at end of 0x80 byte data block,
			// if it is not the last block, then resubmit request for data
			if (readpktcount == 4) {
				dprintf("\nSubmitting next transfer request to BULK OUT endpoint\n");
				readpktcount = 0;

				ch341ReadCmdMarshall(ch341outBuffer, byteoffset, eeprom_info); // Fill output buffer
				libusb_fill_bulk_transfer(xferBulkOut, handle, BULK_WRITE_ENDPOINT, ch341outBuffer,
							EEPROM_READ_BULKOUT_BUF_SZ, cbBulkOut, NULL, DEFAULT_TIMEOUT);

				libusb_submit_transfer(xferBulkOut); // update transfer struct (with new EEPROM page offset)
								     // and re-submit next transfer request to BULK OUT endpoint
			}
		}
	}
	printf("Read 100%% [%d] of [%d] bytes      \n", byteoffset, bytestoread);

	libusb_free_transfer(xferBulkIn);
	libusb_free_transfer(xferBulkOut);
	return 0;
}
*/

// --------------------------------------------------------------------------
// ch341readEEPROM()
//      read n bytes from device (in packets of 32 bytes)
int32_t ch341readEEPROM_param(uint8_t *buffer, uint32_t offset, uint32_t bytestoread, uint32_t ic_size, uint32_t block_size, uint8_t algorithm)
{

    uint8_t ch341outBuffer[EEPROM_READ_BULKOUT_BUF_SZ];
    uint8_t ch341inBuffer[IN_BUF_SZ]; // 0x100 bytes
    int32_t ret = 0, readpktcount = 0;
    struct libusb_transfer *xferBulkIn, *xferBulkOut;
    struct timeval tv = {0, 100};     // our async polling interval
//
    struct EEPROM eeprom_info;
    eeprom_info.name = "24c01";
    eeprom_info.size = ic_size;
    eeprom_info.page_size = (uint16_t)block_size;
    eeprom_info.addr_size = 0x0f & algorithm;
    eeprom_info.i2c_addr_mask = (0xf0 & algorithm) / 16;
    //printf("addr_size=%x addr_mask=%x",eeprom_info.addr_size, eeprom_info.i2c_addr_mask);
//
    xferBulkIn  = libusb_alloc_transfer(0);
    xferBulkOut = libusb_alloc_transfer(0);

    if (!xferBulkIn || !xferBulkOut) {
        printf("Couldnt allocate USB transfer structures\n");
        return -1;
    }

    byteoffset = 0;

    dprintf("Allocated USB transfer structures\n");

    memset(ch341inBuffer, 0, EEPROM_READ_BULKIN_BUF_SZ);
    ch341ReadCmdMarshall(ch341outBuffer, offset, &eeprom_info); // Fill output buffer

    libusb_fill_bulk_transfer(xferBulkIn, handle, BULK_READ_ENDPOINT, ch341inBuffer,
        EEPROM_READ_BULKIN_BUF_SZ, cbBulkIn, NULL, DEFAULT_TIMEOUT);

    libusb_fill_bulk_transfer(xferBulkOut, handle, BULK_WRITE_ENDPOINT,
        ch341outBuffer, EEPROM_READ_BULKOUT_BUF_SZ, cbBulkOut, NULL, DEFAULT_TIMEOUT);

    dprintf("Filled USB transfer structures\n");

    libusb_submit_transfer(xferBulkIn);
    dprintf("Submitted BULK IN start packet\n");
    libusb_submit_transfer(xferBulkOut);
    dprintf("Submitted BULK OUT setup packet\n");

    readbuf = buffer;

    while (1) {
        //printf("Read %d%% [%d] of [%d] bytes      ", 100 * byteoffset / bytestoread, byteoffset, bytestoread);
        //printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
        //fflush(stdout);
        ret = libusb_handle_events_timeout(NULL, &tv);

        if (ret < 0 || getnextpkt == -1) {  // indicates an error
            printf("ret from libusb_handle_timeout = %d\n", ret);
            printf("getnextpkt = %d\n", getnextpkt);
            if (ret < 0)
                printf("USB read error : %s\n", strerror(-ret));
            libusb_free_transfer(xferBulkIn);
            libusb_free_transfer(xferBulkOut);
            return -1;
        }
        if (getnextpkt == 1) {   // callback function reports a new BULK IN packet received
            getnextpkt = 0; // reset the flag
            readpktcount++; // increment the read packet counter
            byteoffset += EEPROM_READ_BULKIN_BUF_SZ;
            if (byteoffset == bytestoread)
                break;

            dprintf("\nRe-submitting transfer request to BULK IN endpoint\n");
            libusb_submit_transfer(xferBulkIn); // re-submit request for next BULK IN packet of EEPROM data
            if (syncackpkt)
                syncackpkt = 0;
            // if 4th packet received, we are at end of 0x80 byte data block,
            // if it is not the last block, then resubmit request for data
            if (readpktcount == 4) {
                dprintf("\nSubmitting next transfer request to BULK OUT endpoint\n");
                readpktcount = 0;

                ch341ReadCmdMarshall(ch341outBuffer, byteoffset, &eeprom_info); // Fill output buffer
                libusb_fill_bulk_transfer(xferBulkOut, handle, BULK_WRITE_ENDPOINT, ch341outBuffer,
                            EEPROM_READ_BULKOUT_BUF_SZ, cbBulkOut, NULL, DEFAULT_TIMEOUT);

                libusb_submit_transfer(xferBulkOut); // update transfer struct (with new EEPROM page offset)
                                     // and re-submit next transfer request to BULK OUT endpoint
            }
        }
    }
    //printf("Read 100%% [%d] of [%d] bytes      \n", byteoffset, bytestoread);

    libusb_free_transfer(xferBulkIn);
    libusb_free_transfer(xferBulkOut);
    return 0;
}


// Callback function for async bulk in comms
void cbBulkIn(struct libusb_transfer *transfer)
{
	int i;

	switch (transfer->status) {
		case LIBUSB_TRANSFER_COMPLETED:
			// display the contents of the BULK IN data buffer
			dprintf("\ncbBulkIn(): status %d - Read %d bytes\n",transfer->status,transfer->actual_length);

			for (i = 0; i < transfer->actual_length; i++) {
				if(!(i % 16))
					dprintf("\n   ");
				dprintf("%02x ", transfer->buffer[i]);
			}
			dprintf("\n");
			// copy read data to our EEPROM buffer
			memcpy(readbuf + byteoffset, transfer->buffer, transfer->actual_length);
			getnextpkt = 1;
			break;
		default:
			printf("\ncbBulkIn: error : %d\n", transfer->status);
			getnextpkt = -1;
	}
	return;
}

// Callback function for async bulk out comms
void cbBulkOut(struct libusb_transfer *transfer)
{
	syncackpkt = 1;
	dprintf("\ncbBulkOut(): Sync/Ack received: status %d\n", transfer->status);
	return;
}

// --------------------------------------------------------------------------
// ch341writeEEPROM()
//      write n bytes to 24c32/24c64 device (in packets of 32 bytes)

//int32_t ch341writeEEPROM(uint8_t *buffer, uint32_t bytesum, struct EEPROM *eeprom_info)
//{
//	uint8_t ch341outBuffer[512/*EEPROM_WRITE_BUF_SZ*/];
/*	uint8_t *outptr, *bufptr;
	uint8_t i2cCmdBuffer[256];
	int32_t ret = 0, i;
	uint32_t payload_size, byteoffset = 0;
	uint32_t bytes = bytesum;
	uint8_t addrbytecount = (*eeprom_info).addr_size + 1; // 24c32 and 24c64 (and other 24c??) use 3 bytes for addressing
	int32_t actuallen = 0;
	uint16_t page_size = (*eeprom_info).page_size;
	uint16_t page_size_left;
	uint8_t part_no;
	uint8_t *i2cBufPtr;

	bufptr = buffer;

	while (bytes) {
		outptr = i2cCmdBuffer;
		if ((*eeprom_info).addr_size >= 2) {
			*outptr++ = (uint8_t) (0xa0 | (byteoffset >> 16 & (*eeprom_info).i2c_addr_mask) << 1); // EEPROM device address
			*outptr++ = (uint8_t) (byteoffset >> 8 & 0xff); // MSB (big-endian) byte address
		} else {
			*outptr++ = (uint8_t) (0xa0 | (byteoffset >> 8 & (*eeprom_info).i2c_addr_mask) << 1); // EEPROM device address
		}
		*outptr++ = (uint8_t) (byteoffset & 0xff); // LSB of 16-bit    byte address

		memcpy(outptr, bufptr, page_size); // Copy one page

		byteoffset += page_size;
		bufptr += page_size;
		bytes  -= page_size;

		outptr = ch341outBuffer;
		page_size_left = page_size + addrbytecount;
		part_no = 0;
		i2cBufPtr = i2cCmdBuffer;
		while (page_size_left) {
			uint8_t to_write = MIN(page_size_left, 28);
			*outptr++ = mCH341A_CMD_I2C_STREAM;
			if (part_no == 0) { // Start packet
				*outptr++ = mCH341A_CMD_I2C_STM_STA;
			}
			*outptr++ = mCH341A_CMD_I2C_STM_OUT | to_write;
			memcpy(outptr, i2cBufPtr, to_write);
			outptr += to_write;
			i2cBufPtr += to_write;
			page_size_left -= to_write;

			if (page_size_left == 0) { // Stop packet
				*outptr++ = mCH341A_CMD_I2C_STM_STO;
			}
			*outptr++ = mCH341A_CMD_I2C_STM_END;
			part_no++;
		}
		payload_size = outptr - ch341outBuffer;

		for (i = 0; i < payload_size; i++) {
			if(!(i % 0x10))
				dprintf("\n%04x : ", i);
			dprintf("%02x ", ch341outBuffer[i]);
		}
		dprintf("\n");

		ret = libusb_bulk_transfer(handle, BULK_WRITE_ENDPOINT,
					    ch341outBuffer, payload_size, &actuallen, DEFAULT_TIMEOUT);

		if (ret < 0) {
			printf("Failed to write to EEPROM: '%s'\n", strerror(-ret));
			return -1;
		}

		dprintf("Writing [aa 5a 00] to EEPROM\n"); // Magic CH341a packet! Undocumented, unknown purpose

		outptr = ch341outBuffer;
		*outptr++ = mCH341A_CMD_I2C_STREAM;
		*outptr++ = 0x5a;  // what is this 0x5a??
		*outptr++ = mCH341A_CMD_I2C_STM_END;

		ret = libusb_bulk_transfer(handle, BULK_WRITE_ENDPOINT, ch341outBuffer, 3, &actuallen, DEFAULT_TIMEOUT);

		if (ret < 0) {
			printf("Failed to write to EEPROM: '%s'\n", strerror(-ret));
			return -1;
		}

		/*
		struct timeval tv = {0, 100};                   // our async polling interval
		ret = libusb_handle_events_timeout(NULL, &tv);
		if (ret < 0) {          // indicates an error
			fprintf(stderr, "ret from libusb_handle_timeout = %d\n", ret);
			fprintf(stderr, "USB read error : %s\n", strerror(-ret));
			return -1;
		}
		*/
/*		printf("\bWritten %d%% [%d] of [%d] bytes      ", 100 * (bytesum - bytes) / bytesum, bytesum - bytes, bytesum);
		printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
		fflush(stdout);
	}
	printf("Written 100%% [%d] of [%d] bytes      \n", bytesum - bytes, bytesum);
	return 0;
}
*/
// --------------------------------------------------------------------------
// ch341writeEEPROM()
//      write n bytes to 24c32/24c64 device (in packets of 32 bytes)
int32_t ch341writeEEPROM_param(uint8_t *buffer, uint32_t offset, uint32_t bytesum, uint32_t block_size, uint8_t algorithm)
{
    uint8_t addr_size = 0x0f & algorithm;
    uint8_t i2c_addr_mask = (0xf0 & algorithm) / 16;
    uint8_t ch341outBuffer[512/*EEPROM_WRITE_BUF_SZ*/];
    uint8_t *outptr, *bufptr;
    uint8_t i2cCmdBuffer[256];
    int32_t ret = 0, i;
    uint32_t payload_size, byteoffset = offset;
    uint32_t bytes = bytesum;
    uint8_t addrbytecount = 0x0f & algorithm + 1; // 24c32 and 24c64 (and other 24c??) use 3 bytes for addressing
    int32_t actuallen = 0;
    uint32_t page_size = block_size;
    uint16_t page_size_left;
    uint8_t part_no;
    uint8_t *i2cBufPtr;

    bufptr = buffer;

    while (bytes) {
        outptr = i2cCmdBuffer;
        if (addr_size >= 2) {
            *outptr++ = (uint8_t) (0xa0 | (byteoffset >> 16 & i2c_addr_mask) << 1); // EEPROM device address
            *outptr++ = (uint8_t) (byteoffset >> 8 & 0xff); // MSB (big-endian) byte address
        } else {
            *outptr++ = (uint8_t) (0xa0 | (byteoffset >> 8 & i2c_addr_mask) << 1); // EEPROM device address
        }
        *outptr++ = (uint8_t) (byteoffset & 0xff); // LSB of 16-bit    byte address

        memcpy(outptr, bufptr, page_size); // Copy one page

        byteoffset += page_size;
        bufptr += page_size;
        bytes  -= page_size;

        outptr = ch341outBuffer;
        page_size_left = page_size + addrbytecount;
        part_no = 0;
        i2cBufPtr = i2cCmdBuffer;
        while (page_size_left) {
            uint8_t to_write = MIN(page_size_left, 28);
            *outptr++ = mCH341A_CMD_I2C_STREAM;
            if (part_no == 0) { // Start packet
                *outptr++ = mCH341A_CMD_I2C_STM_STA;
            }
            *outptr++ = mCH341A_CMD_I2C_STM_OUT | to_write;
            memcpy(outptr, i2cBufPtr, to_write);
            outptr += to_write;
            i2cBufPtr += to_write;
            page_size_left -= to_write;

            if (page_size_left == 0) { // Stop packet
                *outptr++ = mCH341A_CMD_I2C_STM_STO;
            }
            *outptr++ = mCH341A_CMD_I2C_STM_END;
            part_no++;
        }
        payload_size = outptr - ch341outBuffer;

        for (i = 0; i < payload_size; i++) {
            if(!(i % 0x10))
                dprintf("\n%04x : ", i);
            dprintf("%02x ", ch341outBuffer[i]);
        }
        dprintf("\n");

        ret = libusb_bulk_transfer(handle, BULK_WRITE_ENDPOINT,
                        ch341outBuffer, payload_size, &actuallen, DEFAULT_TIMEOUT);

        if (ret < 0) {
            printf("Failed to write to EEPROM: '%s'\n", strerror(-ret));
            return -1;
        }

        dprintf("Writing [aa 5a 00] to EEPROM\n"); // Magic CH341a packet! Undocumented, unknown purpose

        outptr = ch341outBuffer;
        *outptr++ = mCH341A_CMD_I2C_STREAM;
        *outptr++ = 0x5a;  // what is this 0x5a??
        *outptr++ = mCH341A_CMD_I2C_STM_END;

        ret = libusb_bulk_transfer(handle, BULK_WRITE_ENDPOINT, ch341outBuffer, 3, &actuallen, DEFAULT_TIMEOUT);

        if (ret < 0) {
            printf("Failed to write to EEPROM: '%s'\n", strerror(-ret));
            return -1;
        }

        /*
        struct timeval tv = {0, 100};                   // our async polling interval
        ret = libusb_handle_events_timeout(NULL, &tv);
        if (ret < 0) {          // indicates an error
            fprintf(stderr, "ret from libusb_handle_timeout = %d\n", ret);
            fprintf(stderr, "USB read error : %s\n", strerror(-ret));
            return -1;
        }
        */
        //printf("\bWritten %d%% [%d] of [%d] bytes      ", 100 * (bytesum - bytes) / bytesum, bytesum - bytes, bytesum);
        //printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
        //fflush(stdout);
    }
    //printf("Written 100%% [%d] of [%d] bytes      \n", bytesum - bytes, bytesum);
    return 0;
}

// --------------------------------------------------------------------------
// parseEEPsize()
//   passed an EEPROM name (case-sensitive), returns its byte size
/*int32_t parseEEPsize(char *eepromname, struct EEPROM *eeprom)
{
	int i;

	for (i = 0; eepromlist[i].size; i++) {
		if (strstr(eepromlist[i].name, eepromname)) {
			memcpy(eeprom, &(eepromlist[i]), sizeof(struct EEPROM));
			return (eepromlist[i].size);
		}
	}

	return -1;
}
*/