0.1.6
by Jonathan McCrohan
Import upstream version 0.11.0~svn1180 |
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/* $Id$
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* $URL$
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*
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* TeakLCM lcd4linux driver
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*
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* Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.at>
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* Copyright (C) 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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* Copyright (C) 2011 Hans Ulrich Niedermann <hun@n-dimensional.de>
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* Copyright (C) 2011, 2012 Andreas Thienemann <andreas@bawue.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux 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 2, or (at your option)
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* any later version.
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*
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* LCD4Linux 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, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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*
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* exported fuctions:
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*
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* struct DRIVER drv_TeakLCM
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*
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*/
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#include "config.h" |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <assert.h> |
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#include "event.h" |
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#include "timer.h" |
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#include "debug.h" |
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#include "cfg.h" |
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#include "qprintf.h" |
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#include "udelay.h" |
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#include "plugin.h" |
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#include "widget.h" |
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#include "widget_text.h" |
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#include "widget_icon.h" |
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#include "widget_bar.h" |
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#include "drv.h" |
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#include "drv_generic_text.h" |
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#include "drv_generic_serial.h" |
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static char Name[] = "TeakLCM"; |
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static int global_reset_rx_flag = 0; |
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#define HI8(value) ((u_int8_t)(((value)>>8) & 0xff))
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#define LO8(value) ((u_int8_t)((value) & 0xff))
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static u_int16_t CRC16(u_int8_t value, u_int16_t crcin) |
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{
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u_int16_t k = (((crcin >> 8) ^ value) & 255) << 8; |
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u_int16_t crc = 0; |
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int bits; |
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for (bits = 8; bits; --bits) { |
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if ((crc ^ k) & 0x8000) |
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crc = (crc << 1) ^ 0x1021; |
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else
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crc <<= 1; |
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k <<= 1; |
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}
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return ((crcin << 8) ^ crc); |
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}
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/** Return a printable character */
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static char printable(const char ch) |
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{
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if ((32 <= ch) && (ch < 127)) { |
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return ch; |
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} else { |
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return '.'; |
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}
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}
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static void debug_data_int(const char *prefix, const void *data, const size_t size, const unsigned int delta) |
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{
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const u_int8_t *b = (const u_int8_t *) data; |
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size_t y; |
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assert(delta <= 24); |
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for (y = 0; y < size; y += delta) { |
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char buf[100]; |
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size_t x; |
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ssize_t idx = 0; |
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idx += sprintf(&(buf[idx]), "%04x ", y); |
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for (x = 0; x < delta; x++) { |
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const size_t i = x + y; |
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if (i < size) { |
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idx += sprintf(&(buf[idx]), " %02x", b[i]); |
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} else { |
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idx += sprintf(&(buf[idx]), " "); |
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}
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}
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idx += sprintf(&buf[idx], " "); |
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for (x = 0; x < delta; x++) { |
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const size_t i = x + y; |
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if (i < size) { |
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idx += sprintf(&buf[idx], "%c", printable(b[i])); |
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} else { |
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idx += sprintf(&buf[idx], " "); |
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}
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}
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debug("%s%s", prefix, buf); |
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}
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}
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static void debug_data(const char *prefix, const void *data, const size_t size) |
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{
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debug_data_int(prefix, data, size, 16); |
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}
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typedef enum { |
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CMD_CONNECT = 0x05, |
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CMD_DISCONNECT = 0x06, |
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CMD_ALARM = 0x07, |
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CMD_WRITE = 0x08, |
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CMD_PRINT1 = 0x09, |
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CMD_PRINT2 = 0x0A, |
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CMD_ACK = 0x0B, |
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CMD_NACK = 0x0C, |
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CMD_CONFIRM = 0x0D, |
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CMD_RESET = 0x0E, |
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LCM_CLEAR = 0x21, |
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LCM_HOME = 0x22, |
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LCM_CURSOR_SHIFT_R = 0x23, |
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LCM_CURSOR_SHIFT_L = 0x24, |
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LCM_BACKLIGHT_ON = 0x25, |
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LCM_BACKLIGHT_OFF = 0x26, |
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LCM_LINE2 = 0x27, |
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LCM_DISPLAY_SHIFT_R = 0x28, |
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LCM_DISPLAY_SHIFT_L = 0x29, |
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LCM_CURSOR_ON = 0x2A, |
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LCM_CURSOR_OFF = 0x2B, |
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LCM_CURSOR_BLINK = 0x2C, |
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LCM_DISPLAY_ON = 0x2D, |
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LCM_DISPLAY_OFF = 0x2E |
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} lcm_cmd_t; |
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static
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const char *cmdstr(const lcm_cmd_t cmd) |
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{
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switch (cmd) { |
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#define D(CMD) case CMD_ ## CMD: return "CMD_" # CMD; break;
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D(CONNECT); |
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D(DISCONNECT); |
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D(ACK); |
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D(NACK); |
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D(CONFIRM); |
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D(RESET); |
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D(ALARM); |
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D(WRITE); |
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D(PRINT1); |
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D(PRINT2); |
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#undef D
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#define D(CMD) case LCM_ ## CMD: return "LCM_" # CMD; break;
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D(CLEAR); |
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D(HOME); |
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D(CURSOR_SHIFT_R); |
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D(CURSOR_SHIFT_L); |
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D(BACKLIGHT_ON); |
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D(BACKLIGHT_OFF); |
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D(LINE2); |
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D(DISPLAY_SHIFT_R); |
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D(DISPLAY_SHIFT_L); |
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D(CURSOR_ON); |
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D(CURSOR_OFF); |
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D(CURSOR_BLINK); |
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D(DISPLAY_ON); |
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D(DISPLAY_OFF); |
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#undef D
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}
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return "CMD_UNKNOWN"; |
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}
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/*
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* Magic defines
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*/
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#define LCM_FRAME_MASK 0xFF
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#define LCM_TIMEOUT 2
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#define LCM_ESC 0x1B
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#define LCM_KEY1 0x31
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#define LCM_KEY2 0x32
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#define LCM_KEY3 0x33
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#define LCM_KEY4 0x34
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#define LCM_KEY12 0x35
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#define LCM_KEY13 0x36
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#define LCM_KEY14 0x37
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#define LCM_KEY23 0x38
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#define LCM_KEY24 0x39
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#define LCM_KEY34 0x3A
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/****************************************/
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/*** hardware dependant functions ***/
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/****************************************/
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/* global LCM state machine */
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struct _lcm_fsm_t; |
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typedef struct _lcm_fsm_t lcm_fsm_t; |
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typedef enum { |
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ST_IDLE, /* mode == 0, IDLE */ |
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ST_COMMAND, /* mode == 1, COMMAND */ |
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ST_CONNECTED /* mode == 2, CONNECTED */ |
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} lcm_state_t; |
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static
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const char *state2str(const lcm_state_t state) |
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{
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switch (state) { |
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case ST_IDLE: |
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return "ST_IDLE (0)"; |
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break; |
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case ST_COMMAND: |
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return "ST_COMMAND (1)"; |
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break; |
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case ST_CONNECTED: |
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return "ST_CONNECTED (2)"; |
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break; |
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}
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return "ST_UNKNOWN"; |
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}
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#if 0
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static
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void repeat_connect_to_display_callback(void *data);
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#endif
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static
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void lcm_send_cmd(lcm_cmd_t cmd); |
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static
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void drv_TeakLCM_clear(void); |
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static
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void raw_send_cmd_frame(lcm_cmd_t cmd); |
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static
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void raw_send_data_frame(lcm_cmd_t cmd, const char *data, const unsigned int len); |
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static
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lcm_state_t fsm_get_state(lcm_fsm_t * fsm); |
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static
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void fsm_handle_cmd(lcm_fsm_t * fsm, const lcm_cmd_t cmd); |
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static
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void fsm_handle_datacmd(lcm_fsm_t * fsm, const lcm_cmd_t cmd, const u_int8_t * payload, const unsigned int payload_len); |
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static
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void try_reset(void); |
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static
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void fsm_step(lcm_fsm_t * fsm); |
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static
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void fsm_trans_noop(lcm_fsm_t * fsm, const lcm_state_t next_state); |
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static
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void fsm_trans_cmd(lcm_fsm_t * fsm, const lcm_state_t next_state, const lcm_cmd_t cmd); |
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static
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void fsm_trans_data(lcm_fsm_t * fsm, |
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const lcm_state_t next_state, const lcm_cmd_t cmd, const char *data, const unsigned int len); |
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static
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void fsm_handle_bytes(lcm_fsm_t * fsm, u_int8_t * rxbuf, const unsigned int buflen) |
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{
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if ((buflen >= 3) && (rxbuf[0] == LCM_FRAME_MASK) && (rxbuf[2] == LCM_FRAME_MASK)) { |
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const lcm_cmd_t cmd = rxbuf[1]; |
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debug("%s Received cmd frame (cmd=%d=%s)", __FUNCTION__, cmd, cmdstr(cmd)); |
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fsm_handle_cmd(fsm, cmd); |
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if (buflen > 3) { |
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/* recursively handle remaining bytes */
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fsm_handle_bytes(fsm, &rxbuf[3], buflen - 3); |
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}
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return; |
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} else if ((buflen > 3) && (rxbuf[0] == LCM_FRAME_MASK)) { |
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unsigned int ri; /* raw indexed */ |
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unsigned int ci; /* cooked indexed, i.e. after unescaping */ |
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debug("%s Received possible data frame", __FUNCTION__); |
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/* unescape rxframe data in place */
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u_int16_t crc0 = 0, crc1 = 0, crc2 = 0, crc3 = 0; |
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for (ri = 1, ci = 1; ri < buflen; ri++) { |
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switch (rxbuf[ri]) { |
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case LCM_ESC: |
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ri++; |
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/* fall through */
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default: |
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rxbuf[ci++] = rxbuf[ri]; |
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crc3 = crc2; |
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crc2 = crc1; |
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crc1 = crc0; |
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crc0 = CRC16(rxbuf[ri], crc0); |
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break; |
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}
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if ((rxbuf[ci - 1] == LCM_FRAME_MASK) && (rxbuf[ci - 2] == LO8(crc3)) && (rxbuf[ci - 3] == HI8(crc3))) { |
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/* looks like a complete data frame */
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lcm_cmd_t cmd = rxbuf[1]; |
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u_int16_t len = (rxbuf[3] << 8) + rxbuf[2]; |
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assert(ci == (unsigned int) (1 + 1 + 2 + len + 2 + 1)); |
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fsm_handle_datacmd(fsm, cmd, &rxbuf[4], len); |
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if (ri + 1 < buflen) { |
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/* recursively handle remaining bytes */
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fsm_handle_bytes(fsm, &rxbuf[ri + 1], buflen - ri); |
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}
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return; |
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}
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}
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fsm_trans_cmd(fsm, fsm_get_state(fsm), /* TODO: Is this a good next_state value? */ |
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CMD_NACK); |
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debug("%s checksum/framemask error", __FUNCTION__); |
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return; |
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} else { |
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debug("%s Received garbage data:", __FUNCTION__); |
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debug_data(" RXD ", rxbuf, buflen); |
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return; |
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}
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}
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static void fsm_handle_cmd(lcm_fsm_t * fsm, lcm_cmd_t cmd) |
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{
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// debug("fsm_handle_cmd: old state 0x%02x %s", lcm_mode, modestr(lcm_mode));
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const lcm_state_t old_state = fsm_get_state(fsm); |
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if (CMD_RESET == cmd) { |
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global_reset_rx_flag = 1; |
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}
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switch (old_state) { |
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case ST_IDLE: |
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case ST_COMMAND: |
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switch (cmd) { |
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case CMD_CONNECT: |
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fsm_trans_cmd(fsm, ST_COMMAND, CMD_ACK); |
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break; |
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case CMD_ACK: |
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380 |
fsm_trans_cmd(fsm, ST_CONNECTED, CMD_CONFIRM); |
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break; |
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case CMD_NACK: |
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fsm_trans_cmd(fsm, ST_IDLE, CMD_CONFIRM); |
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break; |
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case CMD_CONFIRM: |
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fsm_trans_noop(fsm, ST_CONNECTED); |
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break; |
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388 |
case CMD_RESET: |
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389 |
fsm_trans_cmd(fsm, ST_COMMAND, CMD_CONNECT); |
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390 |
break; |
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391 |
default: |
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392 |
error("%s: Unhandled cmd %s in state %s", Name, cmdstr(cmd), state2str(old_state)); |
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393 |
fsm_trans_cmd(fsm, ST_IDLE, CMD_NACK); |
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394 |
break; |
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395 |
}
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396 |
break; |
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397 |
case ST_CONNECTED: /* "if (mode == 2)" */ |
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398 |
switch (cmd) { |
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399 |
case CMD_ACK: |
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400 |
fsm_trans_cmd(fsm, ST_CONNECTED, CMD_CONFIRM); |
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401 |
break; |
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402 |
case CMD_CONNECT: |
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403 |
fsm_trans_cmd(fsm, ST_CONNECTED, CMD_NACK); |
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404 |
break; |
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405 |
case CMD_DISCONNECT: |
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406 |
fsm_trans_cmd(fsm, ST_CONNECTED, CMD_ACK); |
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407 |
break; |
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408 |
case CMD_RESET: |
|
409 |
fsm_trans_cmd(fsm, ST_IDLE, CMD_CONNECT); |
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410 |
break; |
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411 |
default: |
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412 |
debug("%s: Ignoring unhandled cmd %s in state %s", Name, cmdstr(cmd), state2str(old_state)); |
|
413 |
fsm_trans_noop(fsm, ST_CONNECTED); |
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414 |
break; |
|
415 |
}
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|
416 |
break; |
|
417 |
}
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|
418 |
fsm_step(fsm); |
|
419 |
}
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420 |
||
421 |
||
422 |
static
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423 |
void fsm_handle_datacmd(lcm_fsm_t * fsm, const lcm_cmd_t cmd, const u_int8_t * payload, unsigned int payload_len) |
|
424 |
{
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|
425 |
const lcm_state_t old_state = fsm_get_state(fsm); |
|
426 |
debug("fsm_handle_datacmd: old state 0x%02x %s", old_state, state2str(old_state)); |
|
427 |
switch (old_state) { |
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428 |
case ST_CONNECTED: |
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429 |
switch (cmd) { |
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430 |
case CMD_WRITE: |
|
431 |
assert(payload_len == 1); |
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432 |
debug("Got a key code 0x%02x", *payload); |
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433 |
fsm_trans_noop(fsm, ST_CONNECTED); |
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434 |
// lcm_send_cmd_frame(CMD_ACK);
|
|
435 |
break; |
|
436 |
default: |
|
437 |
debug("Got an unknown data frame: %d=%s", cmd, cmdstr(cmd)); |
|
438 |
fsm_trans_noop(fsm, ST_CONNECTED); |
|
439 |
// lcm_send_cmd_frame(CMD_NACK);
|
|
440 |
break; |
|
441 |
}
|
|
442 |
break; |
|
443 |
case ST_IDLE: |
|
444 |
case ST_COMMAND: |
|
445 |
fsm_trans_cmd(fsm, old_state, CMD_NACK); |
|
446 |
break; |
|
447 |
}
|
|
448 |
fsm_step(fsm); |
|
449 |
}
|
|
450 |
||
451 |
||
452 |
struct _lcm_fsm_t { |
|
453 |
lcm_state_t state; |
|
454 |
lcm_state_t next_state; |
|
455 |
enum { |
|
456 |
ACTION_UNINITIALIZED, |
|
457 |
ACTION_NOOP, |
|
458 |
ACTION_CMD, |
|
459 |
ACTION_DATA
|
|
460 |
} action_type; |
|
461 |
union { |
|
462 |
struct { |
|
463 |
lcm_cmd_t cmd; |
|
464 |
} cmd_frame; |
|
465 |
struct { |
|
466 |
lcm_cmd_t cmd; |
|
467 |
const char *data; |
|
468 |
unsigned int len; |
|
469 |
} data_frame; |
|
470 |
} action; |
|
471 |
};
|
|
472 |
||
473 |
||
474 |
static
|
|
475 |
lcm_state_t fsm_get_state(lcm_fsm_t * fsm) |
|
476 |
{
|
|
477 |
return fsm->state; |
|
478 |
}
|
|
479 |
||
480 |
||
481 |
static
|
|
482 |
void flush_shadow(void); |
|
483 |
||
484 |
||
485 |
static
|
|
486 |
void fsm_step(lcm_fsm_t * fsm) |
|
487 |
{
|
|
488 |
debug("fsm: old_state=%s new_state=%s", state2str(fsm->state), state2str(fsm->next_state)); |
|
489 |
switch (fsm->action_type) { |
|
490 |
case ACTION_UNINITIALIZED: |
|
491 |
error("Uninitialized LCM FSM action"); |
|
492 |
abort(); |
|
493 |
break; |
|
494 |
case ACTION_NOOP: |
|
495 |
break; |
|
496 |
case ACTION_CMD: |
|
497 |
raw_send_cmd_frame(fsm->action.cmd_frame.cmd); |
|
498 |
break; |
|
499 |
case ACTION_DATA: |
|
500 |
raw_send_data_frame(fsm->action.data_frame.cmd, fsm->action.data_frame.data, fsm->action.data_frame.len); |
|
501 |
break; |
|
502 |
}
|
|
503 |
fsm->action_type = ACTION_UNINITIALIZED; |
|
504 |
switch (fsm->next_state) { |
|
505 |
case ST_IDLE: |
|
506 |
case ST_COMMAND: |
|
507 |
fsm->state = fsm->next_state; |
|
508 |
fsm->next_state = -1; |
|
509 |
return; |
|
510 |
break; |
|
511 |
case ST_CONNECTED: |
|
512 |
if (fsm->state != ST_CONNECTED) { |
|
513 |
/* going from ST_IDLE or ST_COMMAND into ST_CONNECTED */
|
|
514 |
if (!global_reset_rx_flag) { |
|
515 |
try_reset(); |
|
516 |
#if 0
|
|
517 |
int timer_res = timer_add(repeat_connect_to_display_callback, NULL, 50 /*ms */ , 1);
|
|
518 |
debug("re-scheduled connect callback result: %d", timer_res);
|
|
519 |
||
520 |
done by try_reset / fsm_init fsm->state = fsm->next_state;
|
|
521 |
fsm->next_state = -1;
|
|
522 |
#endif
|
|
523 |
return; |
|
524 |
} else { |
|
525 |
/* properly connected for the first time */
|
|
526 |
debug("%s: %s NOW CONNECTED!!!", Name, __FUNCTION__); |
|
527 |
||
528 |
fsm->state = fsm->next_state; |
|
529 |
fsm->next_state = -1; |
|
530 |
||
531 |
lcm_send_cmd(LCM_DISPLAY_ON); |
|
532 |
flush_shadow(); |
|
533 |
lcm_send_cmd(LCM_BACKLIGHT_ON); |
|
534 |
return; |
|
535 |
}
|
|
536 |
} else { |
|
537 |
debug("no state change in ST_CONNECTED"); |
|
538 |
fsm->state = fsm->next_state; |
|
539 |
fsm->next_state = -1; |
|
540 |
return; |
|
541 |
}
|
|
542 |
error("we should never arrive here"); |
|
543 |
abort(); |
|
544 |
break; |
|
545 |
}
|
|
546 |
error("LCM FSM: Illegal next_state"); |
|
547 |
abort(); |
|
548 |
}
|
|
549 |
||
550 |
||
551 |
#if 0
|
|
552 |
||
553 |
#endif
|
|
554 |
||
555 |
||
556 |
static
|
|
557 |
void fsm_trans_noop(lcm_fsm_t * fsm, const lcm_state_t next_state) |
|
558 |
{
|
|
559 |
fsm->next_state = next_state; |
|
560 |
fsm->action_type = ACTION_NOOP; |
|
561 |
}
|
|
562 |
||
563 |
||
564 |
static
|
|
565 |
void fsm_trans_cmd(lcm_fsm_t * fsm, const lcm_state_t next_state, const lcm_cmd_t cmd) |
|
566 |
{
|
|
567 |
fsm->next_state = next_state; |
|
568 |
fsm->action_type = ACTION_CMD; |
|
569 |
fsm->action.cmd_frame.cmd = cmd; |
|
570 |
}
|
|
571 |
||
572 |
||
573 |
static
|
|
574 |
void fsm_trans_data(lcm_fsm_t * fsm, |
|
575 |
const lcm_state_t next_state, const lcm_cmd_t cmd, const char *data, const unsigned int len) |
|
576 |
{
|
|
577 |
fsm->next_state = next_state; |
|
578 |
fsm->action_type = ACTION_DATA; |
|
579 |
fsm->action.data_frame.cmd = cmd; |
|
580 |
fsm->action.data_frame.data = data; |
|
581 |
fsm->action.data_frame.len = len; |
|
582 |
}
|
|
583 |
||
584 |
||
585 |
static
|
|
586 |
void fsm_send(lcm_fsm_t * fsm, const lcm_cmd_t cmd) |
|
587 |
{
|
|
588 |
const lcm_state_t old_state = fsm_get_state(fsm); |
|
589 |
switch (old_state) { |
|
590 |
case ST_IDLE: |
|
591 |
case ST_COMMAND: |
|
592 |
debug("%s: %s, ignoring cmd 0x%02x=%s", __FUNCTION__, state2str(old_state), cmd, cmdstr(cmd)); |
|
593 |
/* Silently ignore the command to send. */
|
|
594 |
/* TODO: Would it be better to queue it and send it later? */
|
|
595 |
break; |
|
596 |
case ST_CONNECTED: |
|
597 |
fsm_trans_cmd(fsm, ST_CONNECTED, cmd); |
|
598 |
fsm_step(fsm); |
|
599 |
break; |
|
600 |
}
|
|
601 |
}
|
|
602 |
||
603 |
||
604 |
static
|
|
605 |
void fsm_send_data(lcm_fsm_t * fsm, const lcm_cmd_t cmd, const void *data, const unsigned int len) |
|
606 |
{
|
|
607 |
const lcm_state_t old_state = fsm_get_state(fsm); |
|
608 |
switch (old_state) { |
|
609 |
case ST_IDLE: |
|
610 |
case ST_COMMAND: |
|
611 |
debug("%s: %s, ignoring data cmd 0x%02x=%s", __FUNCTION__, state2str(old_state), cmd, cmdstr(cmd)); |
|
612 |
/* Silently ignore the command to send. */
|
|
613 |
/* TODO: Would it be better to queue it and send it later? */
|
|
614 |
break; |
|
615 |
case ST_CONNECTED: |
|
616 |
fsm_trans_data(fsm, ST_CONNECTED, cmd, data, len); |
|
617 |
fsm_step(fsm); |
|
618 |
break; |
|
619 |
}
|
|
620 |
}
|
|
621 |
||
622 |
||
623 |
static lcm_fsm_t lcm_fsm; |
|
624 |
||
625 |
||
626 |
static
|
|
627 |
void fsm_init(void) |
|
628 |
{
|
|
629 |
lcm_fsm.state = ST_IDLE; |
|
630 |
lcm_fsm.next_state = -1; |
|
631 |
lcm_fsm.action_type = ACTION_UNINITIALIZED; |
|
632 |
}
|
|
633 |
||
634 |
||
635 |
||
636 |
/* Send a command frame to the TCM board */
|
|
637 |
static
|
|
638 |
void raw_send_cmd_frame(lcm_cmd_t cmd) |
|
639 |
{
|
|
640 |
// lcm_receive_check();
|
|
641 |
char cmd_buf[3]; |
|
642 |
cmd_buf[0] = LCM_FRAME_MASK; |
|
643 |
cmd_buf[1] = cmd; |
|
644 |
cmd_buf[2] = LCM_FRAME_MASK; |
|
645 |
debug("%s sending cmd frame cmd=0x%02x=%s", __FUNCTION__, cmd, cmdstr(cmd)); |
|
646 |
debug_data(" TX ", cmd_buf, 3); |
|
647 |
drv_generic_serial_write(cmd_buf, 3); |
|
648 |
usleep(100); |
|
649 |
#if 0
|
|
650 |
usleep(100000);
|
|
651 |
switch (cmd) {
|
|
652 |
case CMD_ACK:
|
|
653 |
//case CMD_CONFIRM:
|
|
654 |
case CMD_NACK:
|
|
655 |
lcm_receive_check();
|
|
656 |
break;
|
|
657 |
default:
|
|
658 |
if (1) {
|
|
659 |
int i;
|
|
660 |
for (i = 0; i < 20; i++) {
|
|
661 |
usleep(100000);
|
|
662 |
if (lcm_receive_check()) {
|
|
663 |
break;
|
|
664 |
}
|
|
665 |
}
|
|
666 |
}
|
|
667 |
break;
|
|
668 |
}
|
|
669 |
#endif
|
|
670 |
}
|
|
671 |
||
672 |
||
673 |
/* Send a data frame to the TCM board */
|
|
674 |
static
|
|
675 |
void raw_send_data_frame(lcm_cmd_t cmd, const char *data, const unsigned int len) |
|
676 |
{
|
|
677 |
unsigned int di; /* data index */ |
|
678 |
unsigned int fi; /* frame index */ |
|
679 |
static char frame[32]; |
|
680 |
u_int16_t crc = 0; |
|
681 |
||
682 |
frame[0] = LCM_FRAME_MASK; |
|
683 |
||
684 |
frame[1] = cmd; |
|
685 |
crc = CRC16(frame[1], crc); |
|
686 |
||
687 |
frame[2] = HI8(len); |
|
688 |
crc = CRC16(frame[2], crc); |
|
689 |
||
690 |
frame[3] = LO8(len); |
|
691 |
crc = CRC16(frame[3], crc); |
|
692 |
||
693 |
#define APPEND(value) \
|
|
694 |
do { \
|
|
695 |
const unsigned char v = (value); \
|
|
696 |
if ((v == LCM_FRAME_MASK) || (v == LCM_ESC)) { \
|
|
697 |
frame[fi++] = LCM_ESC; \
|
|
698 |
} \
|
|
699 |
frame[fi++] = v; \
|
|
700 |
crc = CRC16(v, crc); \
|
|
701 |
} while (0)
|
|
702 |
||
703 |
#define APPEND_NOCRC(value) \
|
|
704 |
do { \
|
|
705 |
const unsigned char v = (value); \
|
|
706 |
if ((v == LCM_FRAME_MASK) || (v == LCM_ESC)) { \
|
|
707 |
frame[fi++] = LCM_ESC; \
|
|
708 |
} \
|
|
709 |
frame[fi++] = v; \
|
|
710 |
} while (0)
|
|
711 |
||
712 |
for (fi = 4, di = 0; di < len; di++) { |
|
713 |
APPEND(data[di]); |
|
714 |
}
|
|
715 |
||
716 |
APPEND_NOCRC(HI8(crc)); |
|
717 |
APPEND_NOCRC(LO8(crc)); |
|
718 |
||
719 |
frame[fi++] = LCM_FRAME_MASK; |
|
720 |
||
721 |
debug_data(" TXD ", frame, fi); |
|
722 |
drv_generic_serial_write(frame, fi); |
|
723 |
||
724 |
#undef APPEND
|
|
725 |
||
726 |
usleep(500); |
|
727 |
}
|
|
728 |
||
729 |
||
730 |
static
|
|
731 |
void lcm_send_cmd(lcm_cmd_t cmd) |
|
732 |
{
|
|
733 |
fsm_send(&lcm_fsm, cmd); |
|
734 |
}
|
|
735 |
||
736 |
||
737 |
static
|
|
738 |
void lcm_event_callback(event_flags_t flags, void *data) |
|
739 |
{
|
|
740 |
lcm_fsm_t *fsm = (lcm_fsm_t *) data; |
|
741 |
debug("%s: flags=%d, data=%p", __FUNCTION__, flags, data); |
|
742 |
if (flags & EVENT_READ) { |
|
743 |
static u_int8_t rxbuf[32]; |
|
744 |
const int readlen = drv_generic_serial_poll((void *) rxbuf, sizeof(rxbuf)); |
|
745 |
if (readlen <= 0) { |
|
746 |
debug("%s Received no data", __FUNCTION__); |
|
747 |
} else { |
|
748 |
debug("%s RECEIVED %d bytes", __FUNCTION__, readlen); |
|
749 |
debug_data(" RX ", rxbuf, readlen); |
|
750 |
fsm_handle_bytes(fsm, rxbuf, readlen); |
|
751 |
}
|
|
752 |
}
|
|
753 |
}
|
|
754 |
||
755 |
||
756 |
static int drv_TeakLCM_open(const char *section) |
|
757 |
{
|
|
758 |
/* open serial port */
|
|
759 |
/* don't mind about device, speed and stuff, this function will take care of */
|
|
760 |
||
761 |
const int fd = drv_generic_serial_open(section, Name, 0); |
|
762 |
if (fd < 0) |
|
763 |
return -1; |
|
764 |
||
765 |
return fd; |
|
766 |
}
|
|
767 |
||
768 |
||
769 |
static int drv_TeakLCM_close(int fd) |
|
770 |
{
|
|
771 |
if (fd >= 0) { |
|
772 |
event_del(fd); |
|
773 |
}
|
|
774 |
||
775 |
/* close whatever port you've opened */
|
|
776 |
drv_generic_serial_close(); |
|
777 |
||
778 |
return 0; |
|
779 |
}
|
|
780 |
||
781 |
||
782 |
/* shadow buffer */
|
|
783 |
static
|
|
784 |
char *shadow; |
|
785 |
||
786 |
||
787 |
static void debug_shadow(const char *prefix) |
|
788 |
{
|
|
789 |
debug_data_int(prefix, shadow, DCOLS * DROWS, 20); |
|
790 |
}
|
|
791 |
||
792 |
||
793 |
static
|
|
794 |
void flush_shadow(void) |
|
795 |
{
|
|
796 |
debug("%s called", __FUNCTION__); |
|
797 |
debug_shadow(" shadow "); |
|
798 |
usleep(50000); |
|
799 |
fsm_send_data(&lcm_fsm, CMD_PRINT1, &shadow[DCOLS * 0], DCOLS); |
|
800 |
usleep(50000); |
|
801 |
fsm_send_data(&lcm_fsm, CMD_PRINT2, &shadow[DCOLS * 1], DCOLS); |
|
802 |
usleep(50000); |
|
803 |
}
|
|
804 |
||
805 |
||
806 |
/* text mode displays only */
|
|
807 |
static
|
|
808 |
void drv_TeakLCM_clear(void) |
|
809 |
{
|
|
810 |
/* do whatever is necessary to clear the display */
|
|
811 |
memset(shadow, ' ', DROWS * DCOLS); |
|
812 |
flush_shadow(); |
|
813 |
}
|
|
814 |
||
815 |
||
816 |
/* text mode displays only */
|
|
817 |
static void drv_TeakLCM_write(const int row, const int col, const char *data, int len) |
|
818 |
{
|
|
819 |
debug("%s row=%d col=%d len=%d data=\"%s\"", __FUNCTION__, row, col, len, data); |
|
820 |
||
821 |
memcpy(&shadow[DCOLS * row + col], data, len); |
|
822 |
||
823 |
debug_shadow(" shadow "); |
|
824 |
||
825 |
fsm_send_data(&lcm_fsm, (row == 0) ? CMD_PRINT1 : CMD_PRINT2, &shadow[DCOLS * row], DCOLS); |
|
826 |
}
|
|
827 |
||
828 |
||
829 |
static
|
|
830 |
void try_reset(void) |
|
831 |
{
|
|
832 |
debug("%s called", __FUNCTION__); |
|
833 |
fsm_init(); |
|
834 |
raw_send_cmd_frame(CMD_RESET); |
|
835 |
}
|
|
836 |
||
837 |
||
838 |
#if 0
|
|
839 |
static
|
|
840 |
void repeat_connect_to_display_callback(void *data)
|
|
841 |
{
|
|
842 |
static int already_called = 0;
|
|
843 |
if (!already_called) {
|
|
844 |
debug("%s(%p): called", __FUNCTION__, data);
|
|
845 |
||
846 |
/* reset & initialize display */
|
|
847 |
try_reset();
|
|
848 |
already_called = 1;
|
|
849 |
} else {
|
|
850 |
debug("%s(%p): already called, ignoring", __FUNCTION__, data);
|
|
851 |
}
|
|
852 |
}
|
|
853 |
#endif
|
|
854 |
||
855 |
||
856 |
static
|
|
857 |
int global_fd = -1; |
|
858 |
||
859 |
||
860 |
static
|
|
861 |
void initial_connect_to_display_callback(void *data) |
|
862 |
{
|
|
863 |
debug("%s(%p): called", __FUNCTION__, data); |
|
864 |
||
865 |
debug("Calling event_add for fd=%d", global_fd); |
|
866 |
int ret = event_add(lcm_event_callback, &lcm_fsm, global_fd, 1, 0, 1); |
|
867 |
debug("event_add result: %d", ret); |
|
868 |
||
869 |
/* reset & initialize display */
|
|
870 |
try_reset(); |
|
871 |
}
|
|
872 |
||
873 |
||
874 |
/* start text mode display */
|
|
875 |
static int drv_TeakLCM_start(const char *section) |
|
876 |
{
|
|
877 |
int rows = -1, cols = -1; |
|
878 |
char *s; |
|
879 |
||
880 |
s = cfg_get(section, "Size", NULL); |
|
881 |
if (s == NULL || *s == '\0') { |
|
882 |
error("%s: no '%s.Size' entry from %s", Name, section, cfg_source()); |
|
883 |
return -1; |
|
884 |
}
|
|
885 |
if (sscanf(s, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) { |
|
886 |
error("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source()); |
|
887 |
free(s); |
|
888 |
return -1; |
|
889 |
}
|
|
890 |
||
891 |
DROWS = rows; |
|
892 |
DCOLS = cols; |
|
893 |
shadow = malloc(DROWS * DCOLS); |
|
894 |
memset(shadow, ' ', DROWS * DCOLS); |
|
895 |
||
896 |
/* open communication with the display */
|
|
897 |
global_fd = drv_TeakLCM_open(section); |
|
898 |
if (global_fd < 0) { |
|
899 |
return -1; |
|
900 |
}
|
|
901 |
debug("%s: %s opened", Name, __FUNCTION__); |
|
902 |
||
903 |
/* read initial garbage data */
|
|
904 |
static u_int8_t rxbuf[32]; |
|
905 |
const int readlen = drv_generic_serial_poll((void *) rxbuf, sizeof(rxbuf)); |
|
906 |
if (readlen >= 0) { |
|
907 |
debug_data(" initial RX garbage ", rxbuf, readlen); |
|
908 |
}
|
|
909 |
||
910 |
/* We need to do a delayed connect */
|
|
911 |
int timer_res = timer_add(initial_connect_to_display_callback, NULL, 10 /*ms */ , 1); |
|
912 |
debug("timer_add for connect callback result: %d", timer_res); |
|
913 |
||
914 |
debug("%s: %s done", Name, __FUNCTION__); |
|
915 |
return 0; |
|
916 |
}
|
|
917 |
||
918 |
||
919 |
/****************************************/
|
|
920 |
/*** plugins ***/
|
|
921 |
/****************************************/
|
|
922 |
||
923 |
||
924 |
/****************************************/
|
|
925 |
/*** widget callbacks ***/
|
|
926 |
/****************************************/
|
|
927 |
||
928 |
||
929 |
/* using drv_generic_text_draw(W) */
|
|
930 |
/* using drv_generic_text_icon_draw(W) */
|
|
931 |
/* using drv_generic_text_bar_draw(W) */
|
|
932 |
||
933 |
||
934 |
/****************************************/
|
|
935 |
/*** exported functions ***/
|
|
936 |
/****************************************/
|
|
937 |
||
938 |
||
939 |
/* list models */
|
|
940 |
int drv_TeakLCM_list(void) |
|
941 |
{
|
|
942 |
printf("TeakLCM driver"); |
|
943 |
return 0; |
|
944 |
}
|
|
945 |
||
946 |
||
947 |
/* initialize driver & display */
|
|
948 |
/* use this function for a text display */
|
|
949 |
int drv_TeakLCM_init(const char *section, const int quiet) |
|
950 |
{
|
|
951 |
WIDGET_CLASS wc; |
|
952 |
int ret; |
|
953 |
||
954 |
info("%s: %s (quiet=%d)", Name, "$Rev$", quiet); |
|
955 |
||
956 |
/* display preferences */
|
|
957 |
XRES = 5; /* pixel width of one char */ |
|
958 |
YRES = 8; /* pixel height of one char */ |
|
959 |
CHARS = 0; /* number of user-defineable characters */ |
|
960 |
CHAR0 = 0; /* ASCII of first user-defineable char */ |
|
961 |
GOTO_COST = -1; /* number of bytes a goto command requires */ |
|
962 |
||
963 |
/* real worker functions */
|
|
964 |
drv_generic_text_real_write = drv_TeakLCM_write; |
|
965 |
||
966 |
/* start display */
|
|
967 |
if ((ret = drv_TeakLCM_start(section)) != 0) |
|
968 |
return ret; |
|
969 |
||
970 |
/* initialize generic text driver */
|
|
971 |
if ((ret = drv_generic_text_init(section, Name)) != 0) |
|
972 |
return ret; |
|
973 |
||
974 |
/* register text widget */
|
|
975 |
wc = Widget_Text; |
|
976 |
wc.draw = drv_generic_text_draw; |
|
977 |
widget_register(&wc); |
|
978 |
||
979 |
/* register plugins */
|
|
980 |
||
981 |
return 0; |
|
982 |
}
|
|
983 |
||
984 |
||
985 |
/* close driver & display */
|
|
986 |
/* use this function for a text display */
|
|
987 |
int drv_TeakLCM_quit(const int quiet) |
|
988 |
{
|
|
989 |
||
990 |
info("%s: shutting down. (quiet=%d)", Name, quiet); |
|
991 |
||
992 |
drv_generic_text_quit(); |
|
993 |
||
994 |
/* clear display */
|
|
995 |
drv_TeakLCM_clear(); |
|
996 |
||
997 |
lcm_send_cmd(LCM_DISPLAY_OFF); |
|
998 |
// lcm_send_cmd_frame(LCM_BACKLIGHT_OFF);
|
|
999 |
lcm_send_cmd(CMD_DISCONNECT); |
|
1000 |
||
1001 |
/* FIXME: consume final ack frame */
|
|
1002 |
usleep(100000); |
|
1003 |
||
1004 |
debug("closing connection"); |
|
1005 |
drv_TeakLCM_close(global_fd); |
|
1006 |
||
1007 |
return (0); |
|
1008 |
}
|
|
1009 |
||
1010 |
||
1011 |
/* use this one for a text display */
|
|
1012 |
DRIVER drv_TeakLCM = { |
|
1013 |
.name = Name, |
|
1014 |
.list = drv_TeakLCM_list, |
|
1015 |
.init = drv_TeakLCM_init, |
|
1016 |
.quit = drv_TeakLCM_quit, |
|
1017 |
};
|
|
1018 |
||
1019 |
||
1020 |
/*
|
|
1021 |
* Local Variables:
|
|
1022 |
* c-basic-offset: 4
|
|
1023 |
* End:
|
|
1024 |
*/
|