/* * avrdude - A Downloader/Uploader for AVR device programmers * Copyright (C) 2009 Lars Immisch * * 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 2 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 . */ /* $Id$ */ /* * avrdude interface for Arduino programmer * * The Arduino programmer is mostly a STK500v1, just the signature bytes * are read differently. */ #include "ac_cfg.h" #include #include #include #include "avrdude.h" #include "libavrdude.h" #include "stk500_private.h" #include "stk500.h" #include "arduino.h" /* read signature bytes - arduino version */ static int arduino_read_sig_bytes(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m) { unsigned char buf[32]; /* Signature byte reads are always 3 bytes. */ if (m->size < 3) { avrdude_message(MSG_INFO, "%s: memsize too small for sig byte read", progname); return -1; } buf[0] = Cmnd_STK_READ_SIGN; buf[1] = Sync_CRC_EOP; serial_send(&pgm->fd, buf, 2); if (serial_recv(&pgm->fd, buf, 5) < 0) return -1; if (buf[0] == Resp_STK_NOSYNC) { avrdude_message(MSG_INFO, "%s: stk500_cmd(): programmer is out of sync\n", progname); return -1; } else if (buf[0] != Resp_STK_INSYNC) { avrdude_message(MSG_INFO, "\n%s: arduino_read_sig_bytes(): (a) protocol error, " "expect=0x%02x, resp=0x%02x\n", progname, Resp_STK_INSYNC, buf[0]); return -2; } if (buf[4] != Resp_STK_OK) { avrdude_message(MSG_INFO, "\n%s: arduino_read_sig_bytes(): (a) protocol error, " "expect=0x%02x, resp=0x%02x\n", progname, Resp_STK_OK, buf[4]); return -3; } m->buf[0] = buf[1]; m->buf[1] = buf[2]; m->buf[2] = buf[3]; return 3; } static int prusa_init_external_flash(PROGRAMMER * pgm) { // Note: send/receive as in _the firmare_ send & receives const char entry_magic_send [] = "start\n"; const char entry_magic_receive[] = "w25x20cl_enter\n"; const char entry_magic_cfm [] = "w25x20cl_cfm\n"; const size_t buffer_len = 32; // Should be large enough for the above messages int res; size_t recv_size; char *buffer = alloca(buffer_len); // 1. receive the "start" command recv_size = sizeof(entry_magic_send) - 1; res = serial_recv(&pgm->fd, buffer, recv_size); if (res < 0) { avrdude_message(MSG_INFO, "%s: prusa_init_external_flash(): MK3 printer did not boot up on time or serial communication failed\n", progname); return -1; } else if (strncmp(buffer, entry_magic_send, recv_size) != 0) { avrdude_message(MSG_INFO, "%s: prusa_init_external_flash(): MK3 printer emitted incorrect start code\n", progname); return -1; } // 2. Send the external flash programmer enter command if (serial_send(&pgm->fd, entry_magic_receive, sizeof(entry_magic_receive) - 1) < 0) { avrdude_message(MSG_INFO, "%s: prusa_init_external_flash(): Failed to send command to the printer\n",progname); return -1; } // 3. Receive the entry confirmation command recv_size = sizeof(entry_magic_cfm) - 1; res = serial_recv(&pgm->fd, buffer, recv_size); if (res < 0) { avrdude_message(MSG_INFO, "%s: prusa_init_external_flash(): MK3 printer did not boot up on time or serial communication failed\n", progname); return -1; } else if (strncmp(buffer, entry_magic_cfm, recv_size) != 0) { avrdude_message(MSG_INFO, "%s: prusa_init_external_flash(): MK3 printer emitted incorrect start code\n", progname); return -1; } return 0; } static int arduino_open(PROGRAMMER * pgm, char * port) { union pinfo pinfo; strcpy(pgm->port, port); pinfo.baud = pgm->baudrate? pgm->baudrate: 115200; if (serial_open(port, pinfo, &pgm->fd)==-1) { return -1; } /* Clear DTR and RTS to unload the RESET capacitor * (for example in Arduino) */ serial_set_dtr_rts(&pgm->fd, 0); usleep(250*1000); /* Set DTR and RTS back to high */ serial_set_dtr_rts(&pgm->fd, 1); usleep(50*1000); /* * drain any extraneous input */ stk500_drain(pgm, 0); // Initialization sequence for programming the external FLASH on the Prusa MK3 if (prusa_init_external_flash(pgm) < 0) { avrdude_message(MSG_INFO, "%s: arduino_open(): Failed to initialize MK3 external flash programming mode\n", progname); } if (stk500_getsync(pgm) < 0) return -1; return 0; } static void arduino_close(PROGRAMMER * pgm) { serial_set_dtr_rts(&pgm->fd, 0); serial_close(&pgm->fd); pgm->fd.ifd = -1; } const char arduino_desc[] = "Arduino programmer"; void arduino_initpgm(PROGRAMMER * pgm) { /* This is mostly a STK500; just the signature is read differently than on real STK500v1 and the DTR signal is set when opening the serial port for the Auto-Reset feature */ stk500_initpgm(pgm); strcpy(pgm->type, "Arduino"); pgm->read_sig_bytes = arduino_read_sig_bytes; pgm->open = arduino_open; pgm->close = arduino_close; }