truck/DashInterface/Display.cpp

// Display (Crystalfontz CFA-635 USB LCD)
//
// Douglas Thrift
//
// $Id$

#include <foreach.hpp>

#include <iomanip>
#include <iostream>

#include <fcntl.h>
#include <termios.h>

#include "Display.hpp"

extern bool debug;

static uint16_t GetCRC(uint8_t *buffer, size_t length)
{
        static const uint16_t table[256] = {
                0x00000, 0x01189, 0x02312, 0x0329b, 0x04624, 0x057ad, 0x06536, 0x074bf,
                0x08C48, 0x09DC1, 0x0AF5A, 0x0BED3, 0x0CA6C, 0x0DBE5, 0x0E97E, 0x0F8F7,
                0x01081, 0x00108, 0x03393, 0x0221a, 0x056a5, 0x0472c, 0x075b7, 0x0643e,
                0x09CC9, 0x08D40, 0x0BFDB, 0x0AE52, 0x0DAED, 0x0CB64, 0x0F9FF, 0x0E876,
                0x02102, 0x0308b, 0x00210, 0x01399, 0x06726, 0x076af, 0x04434, 0x055bd,
                0x0AD4A, 0x0BCC3, 0x08E58, 0x09FD1, 0x0EB6E, 0x0FAE7, 0x0C87C, 0x0D9F5,
                0x03183, 0x0200a, 0x01291, 0x00318, 0x077a7, 0x0662e, 0x054b5, 0x0453c,
                0x0BDCB, 0x0AC42, 0x09ED9, 0x08F50, 0x0FBEF, 0x0EA66, 0x0D8FD, 0x0C974,
                0x04204, 0x0538d, 0x06116, 0x0709f, 0x00420, 0x015a9, 0x02732, 0x036bb,
                0x0ce4c, 0x0dfc5, 0x0ed5e, 0x0fcd7, 0x08868, 0x099e1, 0x0ab7a, 0x0baf3,
                0x05285, 0x0430c, 0x07197, 0x0601e, 0x014a1, 0x00528, 0x037b3, 0x0263a,
                0x0decd, 0x0cf44, 0x0fddf, 0x0ec56, 0x098e9, 0x08960, 0x0bbfb, 0x0aa72,
                0x06306, 0x0728f, 0x04014, 0x0519d, 0x02522, 0x034ab, 0x00630, 0x017b9,
                0x0EF4E, 0x0FEC7, 0x0CC5C, 0x0DDD5, 0x0A96A, 0x0B8E3, 0x08A78, 0x09BF1,
                0x07387, 0x0620e, 0x05095, 0x0411c, 0x035a3, 0x0242a, 0x016b1, 0x00738,
                0x0FFCF, 0x0EE46, 0x0DCDD, 0x0CD54, 0x0B9EB, 0x0A862, 0x09AF9, 0x08B70,
                0x08408, 0x09581, 0x0a71a, 0x0b693, 0x0c22c, 0x0d3a5, 0x0e13e, 0x0f0b7,
                0x00840, 0x019c9, 0x02b52, 0x03adb, 0x04e64, 0x05fed, 0x06d76, 0x07cff,
                0x09489, 0x08500, 0x0b79b, 0x0a612, 0x0d2ad, 0x0c324, 0x0f1bf, 0x0e036,
                0x018c1, 0x00948, 0x03bd3, 0x02a5a, 0x05ee5, 0x04f6c, 0x07df7, 0x06c7e,
                0x0a50a, 0x0b483, 0x08618, 0x09791, 0x0e32e, 0x0f2a7, 0x0c03c, 0x0d1b5,
                0x02942, 0x038cb, 0x00a50, 0x01bd9, 0x06f66, 0x07eef, 0x04c74, 0x05dfd,
                0x0b58b, 0x0a402, 0x09699, 0x08710, 0x0f3af, 0x0e226, 0x0d0bd, 0x0c134,
                0x039C3, 0x0284A, 0x01AD1, 0x00B58, 0x07FE7, 0x06E6E, 0x05CF5, 0x04D7C,
                0x0c60c, 0x0d785, 0x0e51e, 0x0f497, 0x08028, 0x091a1, 0x0a33a, 0x0b2b3,
                0x04a44, 0x05bcd, 0x06956, 0x078df, 0x00c60, 0x01de9, 0x02f72, 0x03efb,
                0x0d68d, 0x0c704, 0x0f59f, 0x0e416, 0x090a9, 0x08120, 0x0b3bb, 0x0a232,
                0x05AC5, 0x04B4C, 0x079D7, 0x0685E, 0x01CE1, 0x00D68, 0x03FF3, 0x02E7A,
                0x0e70e, 0x0f687, 0x0c41c, 0x0d595, 0x0a12a, 0x0b0a3, 0x08238, 0x093b1,
                0x06b46, 0x07acf, 0x04854, 0x059dd, 0x02d62, 0x03ceb, 0x00e70, 0x01ff9,
                0x0f78f, 0x0e606, 0x0d49d, 0x0c514, 0x0b1ab, 0x0a022, 0x092b9, 0x08330,
                0x07BC7, 0x06A4E, 0x058D5, 0x0495C, 0x03DE3, 0x02C6A, 0x01EF1, 0x00F78,
        };
        register uint16_t crc(0xffff);

        while (length--)
                crc = (crc >> 8) ^ table[(crc ^ *buffer++) & 0xff];

        return ~crc;
}

Display::Packet::Packet(Display::Packet::Command command, uint8_t length, const uint8_t *data) : command(command), length(length)
{
        if (length > sizeof (this->data))
                throw;

        ::memcpy(this->data, data, length);

        crc = GetCRC(reinterpret_cast<uint8_t *>(this), length + 2);
}

std::ostream &operator<<(std::ostream &output, const Display::Packet &packet)
{
        return output << _B("0x") << std::hex << std::setw(2) << std::setfill('0') << unsigned(packet.command) << std::dec << std::setw(0) << std::setfill(' ') << _B(" [") << packet.GetData() << ']';
}

void operator<<(int fd, const Display::Packet &packet)
{
        if (packet.length != sizeof (packet.data))
                ::memcpy(const_cast<uint8_t *>(packet.data) + packet.length, &packet.crc, 2);

        if (debug)
                std::cerr << _B("<< ") << packet << std::endl;

        Posix::Write(fd, &packet, packet.length + 4);
}

void operator>>(int fd, Display::Packet &packet)
{
        Posix::Read(fd, &packet, 2);
        Posix::Read(fd, packet.data, packet.length);
        Posix::Read(fd, &packet.crc, 2);

        if (debug)
                std::cerr << _B(">> ") << packet << std::endl;
}

Display::Display(const std::string &device) : ucom(Posix::Open(device, O_RDWR | O_NOCTTY))
{
        ::termios state;

        Posix::CheckError(::tcgetattr(ucom, &state));
        Posix::CheckError(::cfsetospeed(&state, B115200));
        Posix::CheckError(::cfsetispeed(&state, B115200));

        state.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | INPCK | ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXOFF);
        state.c_iflag |= IGNPAR;
        state.c_oflag &= ~(OPOST | ONLCR | ONOCR | ONLRET);
        state.c_cflag &= ~(CSIZE | PARENB | PARODD | HUPCL | CRTSCTS);
        state.c_cflag |= CREAD | CS8 | CSTOPB | CLOCAL;
        state.c_lflag &= ~(ISIG | ICANON | IEXTEN | ECHO);
        state.c_lflag |= NOFLSH;

        Posix::CheckError(::tcsetattr(ucom, TCSANOW, &state));
}

Display::Packet Display::Communicate_(Display::Packet::Command command, uint8_t length, const uint8_t *data)
{
        Packet packet(command, length, data), response;

        ucom << packet;

        _forever
        {
                ucom >> response;

                if (packet.command | Packet::Response == response.command)
                        return response;

                switch (response.command)
                {
                case Packet::KeyActivity:
                        keyActivity.push(response);

                        break;
                case Packet::FanSpeedReport:
                case Packet::TemperatureSensorReport:
                        break;
                }
        }
}

bool Display::Ping(const std::string &data)
{
        return data == Communicate<const std::string &>(Packet::PingCommand, data).GetData();
}

std::string Display::Version()
{
        return Communicate(Packet::GetHardwareAndFirmwareVersion).GetData();
}

void Display::Set(uint8_t column, uint8_t row, const std::string &data)
{
        Communicate(Packet::SendDataToLCD, column, row, data);
}
Revision:	30
Committed:	2008-02-28T17:01:10-08:00 (17 years, 3 months ago) by douglas
File size:	5449 byte(s)
Log Message:	w00t! Moar progress!
#	User	Rev	Content
1	douglas	26	// Display (Crystalfontz CFA-635 USB LCD)
2	douglas	6	//
3			// Douglas Thrift
4			//
5			// $Id$
6
7	douglas	28	#include <foreach.hpp>
8
9	douglas	30	#include <iomanip>
10	douglas	25	#include <iostream>
11	douglas	6
12	douglas	26	#include <fcntl.h>
13			#include <termios.h>
14	douglas	25
15	douglas	26	#include "Display.hpp"
16	douglas	25
17	douglas	28	extern bool debug;
18
19	douglas	26	static uint16_t GetCRC(uint8_t *buffer, size_t length)
20	douglas	25	{
21	douglas	26	static const uint16_t table[256] = {
22	douglas	29	0x00000, 0x01189, 0x02312, 0x0329b, 0x04624, 0x057ad, 0x06536, 0x074bf,
23			0x08C48, 0x09DC1, 0x0AF5A, 0x0BED3, 0x0CA6C, 0x0DBE5, 0x0E97E, 0x0F8F7,
24			0x01081, 0x00108, 0x03393, 0x0221a, 0x056a5, 0x0472c, 0x075b7, 0x0643e,
25			0x09CC9, 0x08D40, 0x0BFDB, 0x0AE52, 0x0DAED, 0x0CB64, 0x0F9FF, 0x0E876,
26			0x02102, 0x0308b, 0x00210, 0x01399, 0x06726, 0x076af, 0x04434, 0x055bd,
27			0x0AD4A, 0x0BCC3, 0x08E58, 0x09FD1, 0x0EB6E, 0x0FAE7, 0x0C87C, 0x0D9F5,
28			0x03183, 0x0200a, 0x01291, 0x00318, 0x077a7, 0x0662e, 0x054b5, 0x0453c,
29			0x0BDCB, 0x0AC42, 0x09ED9, 0x08F50, 0x0FBEF, 0x0EA66, 0x0D8FD, 0x0C974,
30			0x04204, 0x0538d, 0x06116, 0x0709f, 0x00420, 0x015a9, 0x02732, 0x036bb,
31			0x0ce4c, 0x0dfc5, 0x0ed5e, 0x0fcd7, 0x08868, 0x099e1, 0x0ab7a, 0x0baf3,
32			0x05285, 0x0430c, 0x07197, 0x0601e, 0x014a1, 0x00528, 0x037b3, 0x0263a,
33			0x0decd, 0x0cf44, 0x0fddf, 0x0ec56, 0x098e9, 0x08960, 0x0bbfb, 0x0aa72,
34			0x06306, 0x0728f, 0x04014, 0x0519d, 0x02522, 0x034ab, 0x00630, 0x017b9,
35			0x0EF4E, 0x0FEC7, 0x0CC5C, 0x0DDD5, 0x0A96A, 0x0B8E3, 0x08A78, 0x09BF1,
36			0x07387, 0x0620e, 0x05095, 0x0411c, 0x035a3, 0x0242a, 0x016b1, 0x00738,
37			0x0FFCF, 0x0EE46, 0x0DCDD, 0x0CD54, 0x0B9EB, 0x0A862, 0x09AF9, 0x08B70,
38			0x08408, 0x09581, 0x0a71a, 0x0b693, 0x0c22c, 0x0d3a5, 0x0e13e, 0x0f0b7,
39			0x00840, 0x019c9, 0x02b52, 0x03adb, 0x04e64, 0x05fed, 0x06d76, 0x07cff,
40			0x09489, 0x08500, 0x0b79b, 0x0a612, 0x0d2ad, 0x0c324, 0x0f1bf, 0x0e036,
41			0x018c1, 0x00948, 0x03bd3, 0x02a5a, 0x05ee5, 0x04f6c, 0x07df7, 0x06c7e,
42			0x0a50a, 0x0b483, 0x08618, 0x09791, 0x0e32e, 0x0f2a7, 0x0c03c, 0x0d1b5,
43			0x02942, 0x038cb, 0x00a50, 0x01bd9, 0x06f66, 0x07eef, 0x04c74, 0x05dfd,
44			0x0b58b, 0x0a402, 0x09699, 0x08710, 0x0f3af, 0x0e226, 0x0d0bd, 0x0c134,
45			0x039C3, 0x0284A, 0x01AD1, 0x00B58, 0x07FE7, 0x06E6E, 0x05CF5, 0x04D7C,
46			0x0c60c, 0x0d785, 0x0e51e, 0x0f497, 0x08028, 0x091a1, 0x0a33a, 0x0b2b3,
47			0x04a44, 0x05bcd, 0x06956, 0x078df, 0x00c60, 0x01de9, 0x02f72, 0x03efb,
48			0x0d68d, 0x0c704, 0x0f59f, 0x0e416, 0x090a9, 0x08120, 0x0b3bb, 0x0a232,
49			0x05AC5, 0x04B4C, 0x079D7, 0x0685E, 0x01CE1, 0x00D68, 0x03FF3, 0x02E7A,
50			0x0e70e, 0x0f687, 0x0c41c, 0x0d595, 0x0a12a, 0x0b0a3, 0x08238, 0x093b1,
51			0x06b46, 0x07acf, 0x04854, 0x059dd, 0x02d62, 0x03ceb, 0x00e70, 0x01ff9,
52			0x0f78f, 0x0e606, 0x0d49d, 0x0c514, 0x0b1ab, 0x0a022, 0x092b9, 0x08330,
53			0x07BC7, 0x06A4E, 0x058D5, 0x0495C, 0x03DE3, 0x02C6A, 0x01EF1, 0x00F78,
54	douglas	26	};
55			register uint16_t crc(0xffff);
56	douglas	25
57	douglas	26	while (length--)
58			crc = (crc >> 8) ^ table[(crc ^ *buffer++) & 0xff];
59	douglas	25
60	douglas	26	return ~crc;
61			}
62	douglas	25
63	douglas	28	Display::Packet::Packet(Display::Packet::Command command, uint8_t length, const uint8_t *data) : command(command), length(length)
64	douglas	26	{
65			if (length > sizeof (this->data))
66			throw;
67	douglas	25
68	douglas	28	::memcpy(this->data, data, length);
69	douglas	25
70	douglas	26	crc = GetCRC(reinterpret_cast<uint8_t *>(this), length + 2);
71			}
72	douglas	25
73	douglas	30	std::ostream &operator<<(std::ostream &output, const Display::Packet &packet)
74	douglas	26	{
75	douglas	30	return output << _B("0x") << std::hex << std::setw(2) << std::setfill('0') << unsigned(packet.command) << std::dec << std::setw(0) << std::setfill(' ') << _B(" [") << packet.GetData() << ']';
76			}
77
78			void operator<<(int fd, const Display::Packet &packet)
79			{
80	douglas	26	if (packet.length != sizeof (packet.data))
81			::memcpy(const_cast<uint8_t *>(packet.data) + packet.length, &packet.crc, 2);
82	douglas	25
83	douglas	30	if (debug)
84			std::cerr << _B("<< ") << packet << std::endl;
85
86	douglas	26	Posix::Write(fd, &packet, packet.length + 4);
87			}
88	douglas	25
89	douglas	30	void operator>>(int fd, Display::Packet &packet)
90	douglas	26	{
91			Posix::Read(fd, &packet, 2);
92			Posix::Read(fd, packet.data, packet.length);
93			Posix::Read(fd, &packet.crc, 2);
94	douglas	25
95	douglas	28	if (debug)
96	douglas	30	std::cerr << _B(">> ") << packet << std::endl;
97	douglas	25	}
98
99	douglas	26	Display::Display(const std::string &device) : ucom(Posix::Open(device, O_RDWR \| O_NOCTTY))
100	douglas	25	{
101	douglas	26	::termios state;
102	douglas	25
103	douglas	26	Posix::CheckError(::tcgetattr(ucom, &state));
104			Posix::CheckError(::cfsetospeed(&state, B115200));
105			Posix::CheckError(::cfsetispeed(&state, B115200));
106
107			state.c_iflag &= ~(IGNBRK \| BRKINT \| PARMRK \| INPCK \| ISTRIP \| INLCR \| IGNCR \| ICRNL \| IXON \| IXOFF);
108			state.c_iflag \|= IGNPAR;
109			state.c_oflag &= ~(OPOST \| ONLCR \| ONOCR \| ONLRET);
110			state.c_cflag &= ~(CSIZE \| PARENB \| PARODD \| HUPCL \| CRTSCTS);
111			state.c_cflag \|= CREAD \| CS8 \| CSTOPB \| CLOCAL;
112			state.c_lflag &= ~(ISIG \| ICANON \| IEXTEN \| ECHO);
113			state.c_lflag \|= NOFLSH;
114
115			Posix::CheckError(::tcsetattr(ucom, TCSANOW, &state));
116	douglas	25	}
117
118	douglas	29	Display::Packet Display::Communicate_(Display::Packet::Command command, uint8_t length, const uint8_t *data)
119	douglas	25	{
120	douglas	28	Packet packet(command, length, data), response;
121	douglas	25
122	douglas	26	ucom << packet;
123
124	douglas	28	_forever
125	douglas	26	{
126			ucom >> response;
127	douglas	28
128			if (packet.command \| Packet::Response == response.command)
129			return response;
130
131			switch (response.command)
132			{
133			case Packet::KeyActivity:
134			keyActivity.push(response);
135
136			break;
137			case Packet::FanSpeedReport:
138			case Packet::TemperatureSensorReport:
139			break;
140			}
141	douglas	26	}
142	douglas	28	}
143	douglas	26
144	douglas	28	bool Display::Ping(const std::string &data)
145			{
146	douglas	29	return data == Communicate<const std::string &>(Packet::PingCommand, data).GetData();
147	douglas	25	}
148	douglas	28
149			std::string Display::Version()
150			{
151			return Communicate(Packet::GetHardwareAndFirmwareVersion).GetData();
152			}
153
154	douglas	29	void Display::Set(uint8_t column, uint8_t row, const std::string &data)
155	douglas	28	{
156	douglas	30	Communicate(Packet::SendDataToLCD, column, row, data);
157	douglas	28	}