110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/*
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* This file is part of the Black Magic Debug project.
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*
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* Copyright (C) 2011 Black Sphere Technologies Ltd.
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* Written by Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "platform.h"
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#include "gdb_if.h"
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#include "jtag_scan.h"
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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struct ftdi_context *ftdic;
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#define BUF_SIZE 4096
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static uint8_t outbuf[BUF_SIZE];
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static uint16_t bufptr = 0;
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int platform_init(void)
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{
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int err;
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if(ftdic) {
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ftdi_usb_close(ftdic);
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ftdi_free(ftdic);
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ftdic = NULL;
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}
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if((ftdic = ftdi_new()) == NULL) {
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fprintf(stderr, "ftdi_new: %s\n",
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ftdi_get_error_string(ftdic));
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abort();
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}
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if((err = ftdi_set_interface(ftdic, INTERFACE_A)) != 0) {
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fprintf(stderr, "ftdi_set_interface: %d: %s\n",
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err, ftdi_get_error_string(ftdic));
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abort();
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}
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if((err = ftdi_usb_open(ftdic, FT2232_VID, FT2232_PID)) != 0) {
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fprintf(stderr, "unable to open ftdi device: %d (%s)\n",
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err, ftdi_get_error_string(ftdic));
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abort();
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}
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if((err = ftdi_set_latency_timer(ftdic, 1)) != 0) {
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fprintf(stderr, "ftdi_set_latency_timer: %d: %s\n",
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err, ftdi_get_error_string(ftdic));
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abort();
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}
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if((err = ftdi_set_baudrate(ftdic, 1000000)) != 0) {
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fprintf(stderr, "ftdi_set_baudrate: %d: %s\n",
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err, ftdi_get_error_string(ftdic));
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abort();
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}
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if((err = ftdi_usb_purge_buffers(ftdic)) != 0) {
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fprintf(stderr, "ftdi_set_baudrate: %d: %s\n",
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err, ftdi_get_error_string(ftdic));
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abort();
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}
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if((err = ftdi_write_data_set_chunksize(ftdic, BUF_SIZE)) != 0) {
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fprintf(stderr, "ftdi_write_data_set_chunksize: %d: %s\n",
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err, ftdi_get_error_string(ftdic));
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abort();
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}
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assert(gdb_if_init() == 0);
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jtag_scan();
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return 0;
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}
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void platform_buffer_flush(void)
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{
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assert(ftdi_write_data(ftdic, outbuf, bufptr) == bufptr);
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// printf("FT2232 platform_buffer flush: %d bytes\n", bufptr);
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bufptr = 0;
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}
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int platform_buffer_write(const uint8_t *data, int size)
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{
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if((bufptr + size) / BUF_SIZE > 0) platform_buffer_flush();
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memcpy(outbuf + bufptr, data, size);
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bufptr += size;
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return size;
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}
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int platform_buffer_read(uint8_t *data, int size)
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{
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int index = 0;
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platform_buffer_flush();
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while((index += ftdi_read_data(ftdic, data + index, size-index)) != size);
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return size;
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}
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