diff options
Diffstat (limited to 'src/avrdude/arduino.c')
| -rw-r--r-- | src/avrdude/arduino.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/src/avrdude/arduino.c b/src/avrdude/arduino.c new file mode 100644 index 000000000..5a9cb465e --- /dev/null +++ b/src/avrdude/arduino.c @@ -0,0 +1,188 @@ +/* + * 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 <http://www.gnu.org/licenses/>. + */ + +/* $Id$ */ + +/* + * avrdude interface for Arduino programmer + * + * The Arduino programmer is mostly a STK500v1, just the signature bytes + * are read differently. + */ + +#include "ac_cfg.h" + +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#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: `%*s`\n", progname, recv_size, buffer); + 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 cfm code: `%*s`\n", progname, recv_size, buffer); + 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); + + // Sometimes there may be line noise generating input on the printer's USB-to-serial IC + // Here we try to clean its input buffer with a sequence of newlines (a minimum of 9 is needed): + const char cleanup_newlines[] = "\n\n\n\n\n\n\n\n\n\n"; + if (serial_send(&pgm->fd, cleanup_newlines, sizeof(cleanup_newlines) - 1) < 0) { + return -1; + } + + /* + * 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); + return -1; + } + + 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; +} |