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// Display (Crystalfontz CFA-635 USB LCD) |
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// |
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// Douglas Thrift |
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// |
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// $Id$ |
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|
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#include <foreach.hpp> |
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#include <scopes.hpp> |
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|
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#include <iomanip> |
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#include <iostream> |
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|
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#include <fcntl.h> |
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#include <termios.h> |
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|
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#include "Display.hpp" |
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|
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extern bool debug; |
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|
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static uint16_t GetCRC(uint8_t *buffer, size_t length) |
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{ |
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static const uint16_t table[256] = { |
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0x00000, 0x01189, 0x02312, 0x0329b, 0x04624, 0x057ad, 0x06536, 0x074bf, |
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0x08C48, 0x09DC1, 0x0AF5A, 0x0BED3, 0x0CA6C, 0x0DBE5, 0x0E97E, 0x0F8F7, |
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0x01081, 0x00108, 0x03393, 0x0221a, 0x056a5, 0x0472c, 0x075b7, 0x0643e, |
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0x09CC9, 0x08D40, 0x0BFDB, 0x0AE52, 0x0DAED, 0x0CB64, 0x0F9FF, 0x0E876, |
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0x02102, 0x0308b, 0x00210, 0x01399, 0x06726, 0x076af, 0x04434, 0x055bd, |
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0x0AD4A, 0x0BCC3, 0x08E58, 0x09FD1, 0x0EB6E, 0x0FAE7, 0x0C87C, 0x0D9F5, |
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0x03183, 0x0200a, 0x01291, 0x00318, 0x077a7, 0x0662e, 0x054b5, 0x0453c, |
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0x0BDCB, 0x0AC42, 0x09ED9, 0x08F50, 0x0FBEF, 0x0EA66, 0x0D8FD, 0x0C974, |
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0x04204, 0x0538d, 0x06116, 0x0709f, 0x00420, 0x015a9, 0x02732, 0x036bb, |
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0x0ce4c, 0x0dfc5, 0x0ed5e, 0x0fcd7, 0x08868, 0x099e1, 0x0ab7a, 0x0baf3, |
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0x05285, 0x0430c, 0x07197, 0x0601e, 0x014a1, 0x00528, 0x037b3, 0x0263a, |
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0x0decd, 0x0cf44, 0x0fddf, 0x0ec56, 0x098e9, 0x08960, 0x0bbfb, 0x0aa72, |
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0x06306, 0x0728f, 0x04014, 0x0519d, 0x02522, 0x034ab, 0x00630, 0x017b9, |
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0x0EF4E, 0x0FEC7, 0x0CC5C, 0x0DDD5, 0x0A96A, 0x0B8E3, 0x08A78, 0x09BF1, |
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0x07387, 0x0620e, 0x05095, 0x0411c, 0x035a3, 0x0242a, 0x016b1, 0x00738, |
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0x0FFCF, 0x0EE46, 0x0DCDD, 0x0CD54, 0x0B9EB, 0x0A862, 0x09AF9, 0x08B70, |
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0x08408, 0x09581, 0x0a71a, 0x0b693, 0x0c22c, 0x0d3a5, 0x0e13e, 0x0f0b7, |
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0x00840, 0x019c9, 0x02b52, 0x03adb, 0x04e64, 0x05fed, 0x06d76, 0x07cff, |
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0x09489, 0x08500, 0x0b79b, 0x0a612, 0x0d2ad, 0x0c324, 0x0f1bf, 0x0e036, |
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0x018c1, 0x00948, 0x03bd3, 0x02a5a, 0x05ee5, 0x04f6c, 0x07df7, 0x06c7e, |
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0x0a50a, 0x0b483, 0x08618, 0x09791, 0x0e32e, 0x0f2a7, 0x0c03c, 0x0d1b5, |
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0x02942, 0x038cb, 0x00a50, 0x01bd9, 0x06f66, 0x07eef, 0x04c74, 0x05dfd, |
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0x0b58b, 0x0a402, 0x09699, 0x08710, 0x0f3af, 0x0e226, 0x0d0bd, 0x0c134, |
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0x039C3, 0x0284A, 0x01AD1, 0x00B58, 0x07FE7, 0x06E6E, 0x05CF5, 0x04D7C, |
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0x0c60c, 0x0d785, 0x0e51e, 0x0f497, 0x08028, 0x091a1, 0x0a33a, 0x0b2b3, |
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0x04a44, 0x05bcd, 0x06956, 0x078df, 0x00c60, 0x01de9, 0x02f72, 0x03efb, |
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0x0d68d, 0x0c704, 0x0f59f, 0x0e416, 0x090a9, 0x08120, 0x0b3bb, 0x0a232, |
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0x05AC5, 0x04B4C, 0x079D7, 0x0685E, 0x01CE1, 0x00D68, 0x03FF3, 0x02E7A, |
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0x0e70e, 0x0f687, 0x0c41c, 0x0d595, 0x0a12a, 0x0b0a3, 0x08238, 0x093b1, |
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0x06b46, 0x07acf, 0x04854, 0x059dd, 0x02d62, 0x03ceb, 0x00e70, 0x01ff9, |
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0x0f78f, 0x0e606, 0x0d49d, 0x0c514, 0x0b1ab, 0x0a022, 0x092b9, 0x08330, |
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0x07BC7, 0x06A4E, 0x058D5, 0x0495C, 0x03DE3, 0x02C6A, 0x01EF1, 0x00F78, |
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}; |
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register uint16_t crc(0xffff); |
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|
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while (length--) |
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crc = (crc >> 8) ^ table[(crc ^ *buffer++) & 0xff]; |
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|
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return ~crc; |
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} |
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|
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Display::Packet::Packet(Display::Packet::Command command, uint8_t length, const uint8_t *data) : command(command), length(length) |
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{ |
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if (length > sizeof (this->data)) |
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throw; |
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|
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::memcpy(this->data, data, length); |
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|
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crc = GetCRC(reinterpret_cast<uint8_t *>(this), length + 2); |
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} |
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|
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std::ostream &operator<<(std::ostream &output, const Display::Packet &packet) |
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{ |
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return output << _B("0x") << std::hex << std::setw(2) << std::setfill('0') << unsigned(packet.command) << _B(" [") << packet.GetData() << ']'; |
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} |
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|
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void operator<<(int fd, const Display::Packet &packet) |
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{ |
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if (packet.length != sizeof (packet.data)) |
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::memcpy(const_cast<uint8_t *>(packet.data) + packet.length, &packet.crc, 2); |
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|
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if (debug) |
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std::cerr << _B("<< ") << packet << std::endl; |
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|
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Posix::Write(fd, &packet, packet.length + 4); |
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} |
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|
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void operator>>(int fd, Display::Packet &packet) |
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{ |
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Posix::Read(fd, &packet, 2); |
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Posix::Read(fd, packet.data, packet.length); |
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Posix::Read(fd, &packet.crc, 2); |
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|
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if (debug) |
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std::cerr << _B(">> ") << packet << std::endl; |
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} |
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|
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void Communicate(Display *display) |
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{ |
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display->Communicate_(); |
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} |
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|
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Display::Display(const std::string &device) : ucom(Posix::Open(device, O_RDWR | O_NOCTTY | O_NONBLOCK)), ucomCondition(ucomLock), running(true), responsesCondition(responsesLock), thread(reinterpret_cast<void *(*)(void *)>(::Communicate), this) |
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{ |
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::termios state; |
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|
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Posix::CheckError(::tcgetattr(ucom, &state)); |
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Posix::CheckError(::cfsetospeed(&state, B115200)); |
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Posix::CheckError(::cfsetispeed(&state, B115200)); |
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|
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state.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | INPCK | ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXOFF); |
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state.c_iflag |= IGNPAR; |
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state.c_oflag &= ~(OPOST | ONLCR | ONOCR | ONLRET); |
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state.c_cflag &= ~(CSIZE | PARENB | PARODD | HUPCL | CRTSCTS); |
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state.c_cflag |= CREAD | CS8 | CSTOPB | CLOCAL; |
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state.c_lflag &= ~(ISIG | ICANON | IEXTEN | ECHO); |
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state.c_lflag |= NOFLSH; |
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|
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Posix::CheckError(::tcsetattr(ucom, TCSANOW, &state)); |
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|
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_synchronized (ucomLock) |
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ucomCondition.Signal(); |
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} |
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|
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Display::~Display() |
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{ |
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running = false; |
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|
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thread.Join(); |
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|
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Posix::Close(ucom); |
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} |
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|
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void Display::Communicate_() |
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{ |
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_synchronized (ucomLock) |
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ucomCondition.Wait(); |
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|
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while (running) |
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{ |
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Packet response; |
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|
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_synchronized (ucomLock) |
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try |
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{ |
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ucom >> response; |
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} |
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catch (const Posix::Error error) |
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{ |
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if (error.what() != _B("Resource temporarily unavailable")) |
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throw error; |
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|
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goto next; |
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} |
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|
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if ((response.command & Packet::Error) == Packet::Error); |
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else if ((response.command & Packet::Report) == Packet::Report) |
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switch (response.command) |
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{ |
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case Packet::KeyActivity: |
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_synchronized (keyActivityLock) |
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keyActivity.push(response); |
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|
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break; |
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case Packet::FanSpeedReport: |
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case Packet::TemperatureSensorReport: |
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break; |
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} |
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else if ((response.command & Packet::Response) == Packet::Response) |
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_synchronized (responsesLock) |
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{ |
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responses.push(response); |
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responsesCondition.Signal(); |
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} |
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|
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next: ::usleep(500); |
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} |
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} |
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|
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Display::Packet Display::Communicate_(Display::Packet::Command command, uint8_t length, const uint8_t *data) |
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{ |
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Packet packet(command, length, data); |
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|
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_synchronized (ucomLock) |
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ucom << packet; |
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|
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_synchronized (responsesLock) |
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{ |
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while (responses.empty()) |
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responsesCondition.Wait(); |
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|
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Packet response(responses.front()); |
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|
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responses.pop(); |
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|
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assert ((packet.command | Packet::Response) == response.command); |
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|
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return response; |
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} |
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|
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throw; |
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} |
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|
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bool Display::Ping(const std::string &data) |
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{ |
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return data == Communicate<const std::string &>(Packet::PingCommand, data).GetData(); |
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} |
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|
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std::string Display::Version() |
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{ |
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return Communicate(Packet::GetHardwareAndFirmwareVersion).GetData(); |
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} |
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|
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void Display::Set(uint8_t column, uint8_t row, const std::string &data) |
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{ |
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Communicate(Packet::SendDataToLCD, column, row, data); |
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} |
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|
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Display::KeyActivity Display::GetKeyActivity() |
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{ |
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_synchronized (keyActivityLock) |
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if (keyActivity.size()) |
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{ |
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KeyActivity activity(KeyActivity(*keyActivity.front().data)); |
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|
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keyActivity.pop(); |
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|
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return activity; |
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} |
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|
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return None; |
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} |
