parent
6d41563226
commit
c2ba2efd76
GPG Key ID:
A7B62D657EF764F8
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@ -12,3 +12,52 @@ pub const LINES = 8;
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// Device specifications
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// Device specifications
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pub const PAGES = 8;
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pub const PAGES = 8;
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// Device ID on this device is hardwired to 0x3c
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pub const DEVICE_ID = 0x3c;
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pub fn packPixelsToDeviceFormat(pixels: []const u8, packed_pixels: []u8) void {
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// Each u8 in pixels is a single bit. We need to pack these bits
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for (packed_pixels, 0..) |*b, i| {
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const column = i % WIDTH;
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const page = i / WIDTH;
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// if (column == 0) std.debug.print("{d}: ", .{page});
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// pixel array will be 8x as "high" as the data array we are sending to
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// the device. So the device column above is only our starter
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// Display has 8 pages, which is a set of 8 pixels with LSB at top of page
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//
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// To convert from the pixel array above, we need to:
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// 1. convert from device page to a base "row" in the pixel array
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const row = page * PAGES;
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// 2. We will have 8 rows for each base row
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// 3. Multiple each row by the width to get the index of the start of
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// the row
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// 4. Add our current column index for the final pixel location in
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// the pixel array.
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//
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// Now that we have the proper index in the pixel array, we need to
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// convert that into our destination byte. Each index will be a u8, either
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// 0xff for on or 0x00 for off. So...
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//
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// 1. We will take the value and bitwise and with 0x01 so we get one bit
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// per source byte
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// 2. Shift that bit into the proper position in our destination byte
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b.* = (pixels[(0 + row) * WIDTH + column] & 0x01) << 0 |
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(pixels[(1 + row) * WIDTH + column] & 0x01) << 1 |
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(pixels[(2 + row) * WIDTH + column] & 0x01) << 2 |
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(pixels[(3 + row) * WIDTH + column] & 0x01) << 3 |
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(pixels[(4 + row) * WIDTH + column] & 0x01) << 4 |
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(pixels[(5 + row) * WIDTH + column] & 0x01) << 5 |
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(pixels[(6 + row) * WIDTH + column] & 0x01) << 6 |
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(pixels[(7 + row) * WIDTH + column] & 0x01) << 7;
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// std.debug.print("{s}", .{std.fmt.fmtSliceHexLower(&[_]u8{b.*})});
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// if (column == 127) std.debug.print("\n", .{});
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// Last 2 pages are yellow...16 pixels vertical
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// if (page == 6 or page == 7) b.* = 0xff;
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// b.* = 0xf0;
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}
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}
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74
src/i2cnative.zig
Normal file
74
src/i2cnative.zig
Normal file
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@ -0,0 +1,74 @@
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const std = @import("std");
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const display = @import("display.zig");
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const linux = @import("linux.zig");
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const log = std.log.scoped(.i2cnative);
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const c = @cImport({
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@cInclude("linux/i2c-dev.h");
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});
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var pixels_write_command: [display.WIDTH * display.PAGES + 1]u8 = undefined;
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pub fn sendPixels(pixels: []const u8, file: [:0]const u8, device_id: u8) !void {
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log.debug(
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"sendPixels start. File {s}, Device_id 0x{s}\n",
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.{ file, std.fmt.bytesToHex(&[_]u8{device_id}, .lower) },
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);
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const device_file = try openFile(file, device_id);
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defer device_file.close();
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try initializeDevice(device_file);
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// Do the write
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const write_cmds = &[_]u8{
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0x20, 0x00, // Set memory addressing mode to horizontal
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0x21, 0x00, 0x7F, // Start column 0, end column 127
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0x22, 0x00, 0x07, // Start page 0, end page 7
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};
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try device_file.writeAll(write_cmds);
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display.packPixelsToDeviceFormat(pixels, pixels_write_command[1..]);
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log.debug("pixel array length: {d}. After packing: {d}", .{ pixels.len, pixels_write_command.len - 1 });
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pixels_write_command[0] = 0x40;
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try device_file.writeAll(&pixels_write_command);
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log.debug("sendPixels end", .{});
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}
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fn openFile(file: [:0]const u8, device_id: u8) !std.fs.File {
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const device_file = try std.fs.openFileAbsoluteZ(file, .{
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.mode = .read_write,
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});
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errdefer device_file.close();
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try linux.ioctl(device_file.handle, c.I2C_SLAVE, device_id);
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return device_file;
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}
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fn initializeDevice(file: std.fs.File) !void {
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// Send initialization commands to the display
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// zig fmt: off
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const init_cmds = &[_]u8{
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// 0xAE, // Display off
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// oscillator frequency will manage flicker.
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// Recommended at 0x80, I found we sometimes need higher
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// 0xD5, 0xF0, // Set display clock divide ratio/oscillator frequency
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0xD5, 0x80, // Set display clock divide ratio/oscillator frequency
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0xA8, 0x3F, // Set multiplex ratio. Correct for 128x64 devices
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// 0xA8, 0x80, // Set multiplex ratio
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0xD3, 0x00, // Set display offset. Should be 0 normally
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0x40, // Set start line
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0xA0, // Set segment remap
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// 0xC8, // Set COM output scan direction (reversed)
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0xC0, // Set COM output scan direction (normal)
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0xDA, 0x12, // Set COM pins hardware configuration. 0x12 for 128x64
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0x81, 0x7F, // Set contrast
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// These next 4 should not be needed
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// 0xD9, 0xF1, // Set precharge period
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// 0xDB, 0x40, // Set VCOMH deselect level
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// 0xA4, // Set entire display on/off
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// 0xA6, // Set normal display
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0x8D, 0x14, // Charge pump
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0xAF, // Display on
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};
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// zig fmt: on
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try file.writeAll(init_cmds);
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}
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317
src/linux.zig
Normal file
317
src/linux.zig
Normal file
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@ -0,0 +1,317 @@
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const std = @import("std");
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pub fn ioctl(handle: std.os.fd_t, request: u32, arg: usize) !void {
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const rc = std.os.linux.ioctl(handle, request, arg);
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try throwReturnCodeError(rc);
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return;
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}
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pub fn throwReturnCodeError(return_code: usize) LinuxGenericError!void {
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// zig fmt: off
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switch (std.os.errno(return_code)) {
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.SUCCESS => return,
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.PERM => return LinuxGenericError.OperationNotPermittedError,
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.NOENT => return LinuxGenericError.NoSuchFileOrDirectoryError,
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.SRCH => return LinuxGenericError.NoSuchProcessError,
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.INTR => return LinuxGenericError.InterruptedSystemCallError,
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.IO => return LinuxGenericError.IOError,
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.NXIO => return LinuxGenericError.NoSuchDeviceOrAddressError,
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.@"2BIG" => return LinuxGenericError.ArgumentListTooLongError,
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.NOEXEC => return LinuxGenericError.ExecFormatError,
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.BADF => return LinuxGenericError.BadFileNumberError,
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.CHILD => return LinuxGenericError.NoChildProcessesError,
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.AGAIN => return LinuxGenericError.TryAgainError,
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.NOMEM => return LinuxGenericError.OutOfMemoryError,
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.ACCES => return LinuxGenericError.PermissionDeniedError,
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.FAULT => return LinuxGenericError.BadAddressError,
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.NOTBLK => return LinuxGenericError.BlockDeviceRequiredError,
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.BUSY => return LinuxGenericError.DeviceOrResourceBusyError,
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.EXIST => return LinuxGenericError.FileExistsError,
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.XDEV => return LinuxGenericError.CrossDeviceLinkError,
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.NODEV => return LinuxGenericError.NoSuchDeviceError,
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.NOTDIR => return LinuxGenericError.NotADirectoryError,
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.ISDIR => return LinuxGenericError.IsADirectoryError,
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.INVAL => return LinuxGenericError.InvalidArgumentError,
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.NFILE => return LinuxGenericError.FileTableOverflowError,
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.MFILE => return LinuxGenericError.TooManyOpenFilesError,
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.NOTTY => return LinuxGenericError.NotATypewriterError,
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.TXTBSY => return LinuxGenericError.TextFileBusyError,
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.FBIG => return LinuxGenericError.FileTooLargeError,
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.NOSPC => return LinuxGenericError.NoSpaceLeftOnDeviceError,
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.SPIPE => return LinuxGenericError.IllegalSeekError,
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.ROFS => return LinuxGenericError.ReadOnlyFilesystemError,
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.MLINK => return LinuxGenericError.TooManyLinksError,
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.PIPE => return LinuxGenericError.BrokenPipeError,
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.DOM => return LinuxGenericError.MathArgumentOutOfDomainOfFunctionError,
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.RANGE => return LinuxGenericError.MathResultNotRepresentableError,
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.DEADLK => return LinuxGenericError.ResourceDeadLockWouldOccurError,
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.NAMETOOLONG => return LinuxGenericError.FileNameTooLongError,
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.NOLCK => return LinuxGenericError.NoRecordLocksAvailableError,
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.NOSYS => return LinuxGenericError.FunctionNotImplementedError,
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.NOTEMPTY => return LinuxGenericError.DirectoryNotEmptyError,
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.LOOP => return LinuxGenericError.TooManySymbolicLinksEncounteredError,
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.NOMSG => return LinuxGenericError.NoMessageOfDesiredTypeError,
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.IDRM => return LinuxGenericError.IdentifierRemovedError,
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.CHRNG => return LinuxGenericError.ChannelNumberOutOfRangeError,
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.L2NSYNC => return LinuxGenericError.Level2NotSynchronizedError,
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.L3HLT => return LinuxGenericError.Level3HaltedError,
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.L3RST => return LinuxGenericError.Level3ResetError,
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.LNRNG => return LinuxGenericError.LinkNumberOutOfRangeError,
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.UNATCH => return LinuxGenericError.ProtocolDriverNotAttachedError,
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.NOCSI => return LinuxGenericError.NoCSIStructureAvailableError,
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.L2HLT => return LinuxGenericError.Level2HaltedError,
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.BADE => return LinuxGenericError.InvalidExchangeError,
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.BADR => return LinuxGenericError.InvalidRequestDescriptorError,
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.XFULL => return LinuxGenericError.ExchangeFullError,
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.NOANO => return LinuxGenericError.NoAnodeError,
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.BADRQC => return LinuxGenericError.InvalidRequestCodeError,
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.BADSLT => return LinuxGenericError.InvalidSlotError,
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.BFONT => return LinuxGenericError.BadFontFileFormatError,
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.NOSTR => return LinuxGenericError.DeviceNotAStreamError,
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.NODATA => return LinuxGenericError.NoDataAvailableError,
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.TIME => return LinuxGenericError.TimerExpiredError,
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.NOSR => return LinuxGenericError.OutOfStreamsResourcesError,
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.NONET => return LinuxGenericError.MachineIsNotOnTheNetworkError,
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.NOPKG => return LinuxGenericError.PackageNotInstalledError,
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.REMOTE => return LinuxGenericError.ObjectIsRemoteError,
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.NOLINK => return LinuxGenericError.LinkHasBeenSeveredError,
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.ADV => return LinuxGenericError.AdvertiseErrorError,
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.SRMNT => return LinuxGenericError.SrmountErrorError,
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.COMM => return LinuxGenericError.CommunicationErrorOnSendError,
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.PROTO => return LinuxGenericError.ProtocolErrorError,
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.MULTIHOP => return LinuxGenericError.MultihopAttemptedError,
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.DOTDOT => return LinuxGenericError.RFSSpecificErrorError,
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.BADMSG => return LinuxGenericError.NotADataMessageError,
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.OVERFLOW => return LinuxGenericError.ValueTooLargeForDefinedDataTypeError,
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.NOTUNIQ => return LinuxGenericError.NameNotUniqueOnNetworkError,
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.BADFD => return LinuxGenericError.FileDescriptorInBadStateError,
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.REMCHG => return LinuxGenericError.RemoteAddressChangedError,
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.LIBACC => return LinuxGenericError.CanNotAccessANeededSharedLibraryError,
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.LIBBAD => return LinuxGenericError.AccessingACorruptedSharedLibraryError,
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.LIBSCN => return LinuxGenericError.LibSectionInAOoutCorruptedError,
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.LIBMAX => return LinuxGenericError.AttemptingToLinkInTooManySharedLibrariesError,
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.LIBEXEC => return LinuxGenericError.CannotExecASharedLibraryDirectlyError,
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.ILSEQ => return LinuxGenericError.IllegalByteSequenceError,
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.RESTART => return LinuxGenericError.InterruptedSystemCallShouldBeRestartedError,
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.STRPIPE => return LinuxGenericError.StreamsPipeErrorError,
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.USERS => return LinuxGenericError.TooManyUsersError,
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.NOTSOCK => return LinuxGenericError.SocketOperationOnNonSocketError,
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.DESTADDRREQ => return LinuxGenericError.DestinationAddressRequiredError,
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.MSGSIZE => return LinuxGenericError.MessageTooLongError,
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.PROTOTYPE => return LinuxGenericError.ProtocolWrongTypeForSocketError,
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.NOPROTOOPT => return LinuxGenericError.ProtocolNotAvailableError,
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.PROTONOSUPPORT => return LinuxGenericError.ProtocolNotSupportedError,
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.SOCKTNOSUPPORT => return LinuxGenericError.SocketTypeNotSupportedError,
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.OPNOTSUPP => return LinuxGenericError.OperationNotSupportedOnTransportEndpointError,
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.PFNOSUPPORT => return LinuxGenericError.ProtocolFamilyNotSupportedError,
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.AFNOSUPPORT => return LinuxGenericError.AddressFamilyNotSupportedByProtocolError,
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.ADDRINUSE => return LinuxGenericError.AddressAlreadyInUseError,
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.ADDRNOTAVAIL => return LinuxGenericError.CannotAssignRequestedAddressError,
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.NETDOWN => return LinuxGenericError.NetworkIsDownError,
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.NETUNREACH => return LinuxGenericError.NetworkIsUnreachableError,
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.NETRESET => return LinuxGenericError.NetworkDroppedConnectionBecauseOfResetError,
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.CONNABORTED => return LinuxGenericError.SoftwareCausedConnectionAbortError,
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.CONNRESET => return LinuxGenericError.ConnectionResetByPeerError,
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.NOBUFS => return LinuxGenericError.NoBufferSpaceAvailableError,
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.ISCONN => return LinuxGenericError.TransportEndpointIsAlreadyConnectedError,
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.NOTCONN => return LinuxGenericError.TransportEndpointIsNotConnectedError,
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.SHUTDOWN => return LinuxGenericError.CannotSendAfterTransportEndpointShutdownError,
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.TOOMANYREFS => return LinuxGenericError.TooManyReferencesCannotSpliceError,
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.TIMEDOUT => return LinuxGenericError.ConnectionTimedOutError,
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.CONNREFUSED => return LinuxGenericError.ConnectionRefusedError,
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.HOSTDOWN => return LinuxGenericError.HostIsDownError,
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.HOSTUNREACH => return LinuxGenericError.NoRouteToHostError,
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.ALREADY => return LinuxGenericError.OperationAlreadyInProgressError,
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.INPROGRESS => return LinuxGenericError.OperationNowInProgressError,
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.STALE => return LinuxGenericError.StaleNFSFileHandleError,
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.UCLEAN => return LinuxGenericError.StructureNeedsCleaningError,
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.NOTNAM => return LinuxGenericError.NotAXENIXNamedTypeFileError,
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.NAVAIL => return LinuxGenericError.NoXENIXSemaphoresAvailableError,
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.ISNAM => return LinuxGenericError.IsANamedTypeFileError,
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.REMOTEIO => return LinuxGenericError.RemoteIOErrorError,
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.DQUOT => return LinuxGenericError.QuotaExceededError,
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.NOMEDIUM => return LinuxGenericError.NoMediumFoundError,
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.MEDIUMTYPE => return LinuxGenericError.WrongMediumTypeError,
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.CANCELED => return LinuxGenericError.OperationCanceledError,
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.NOKEY => return LinuxGenericError.RequiredKeyNotAvailableError,
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.KEYEXPIRED => return LinuxGenericError.KeyHasExpiredError,
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.KEYREVOKED => return LinuxGenericError.KeyHasBeenRevokedError,
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.KEYREJECTED => return LinuxGenericError.KeyWasRejectedByServiceError,
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.OWNERDEAD => return LinuxGenericError.OwnerDiedError,
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.NOTRECOVERABLE => return LinuxGenericError.StateNotRecoverableError,
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.RFKILL => return LinuxGenericError.OperationNotPossibleDueToRFKillError,
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.HWPOISON => return LinuxGenericError.MemoryPageHasHardwareErrorError,
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.NSRNODATA => return LinuxGenericError.DNSServerReturnedAnswerWithNoDataError,
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.NSRFORMERR => return LinuxGenericError.DNSServerClaimsQueryWasMisformattedError,
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.NSRSERVFAIL => return LinuxGenericError.DNSServerReturnedGeneralFailureError,
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.NSRNOTFOUND => return LinuxGenericError.DomainNameNotFoundError,
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.NSRNOTIMP => return LinuxGenericError.DNSServerDoesNotImplementRequestedOperationError,
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.NSRREFUSED => return LinuxGenericError.DNSServerRefusedQueryError,
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.NSRBADQUERY => return LinuxGenericError.MisformattedDNSQueryError,
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.NSRBADNAME => return LinuxGenericError.MisformattedDomainNameError,
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.NSRBADFAMILY => return LinuxGenericError.UnsupportedAddressFamilyError,
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.NSRBADRESP => return LinuxGenericError.MisformattedDNSReplyError,
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.NSRCONNREFUSED => return LinuxGenericError.CouldNotContactDNSServersError,
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.NSRTIMEOUT => return LinuxGenericError.TimeoutWhileContactingDNSServersError,
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.NSROF => return LinuxGenericError.EndOfFileError,
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.NSRFILE => return LinuxGenericError.ErrorReadingFileError,
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.NSRNOMEM => return LinuxGenericError.NameServerOutOfMemoryError,
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.NSRDESTRUCTION => return LinuxGenericError.ApplicationTerminatedLookupError,
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.NSRQUERYDOMAINTOOLONG => return LinuxGenericError.DomainNameIsTooLongError,
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.NSRCNAMELOOP => return LinuxGenericError.NameServerCNameLoopError,
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else => unreachable,
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}
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// zig fmt: on
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}
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pub const LinuxGenericError = error{
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OperationNotPermittedError,
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NoSuchFileOrDirectoryError,
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NoSuchProcessError,
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InterruptedSystemCallError,
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IOError,
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NoSuchDeviceOrAddressError,
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ArgumentListTooLongError,
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ExecFormatError,
|
||||||
|
BadFileNumberError,
|
||||||
|
NoChildProcessesError,
|
||||||
|
TryAgainError,
|
||||||
|
OutOfMemoryError,
|
||||||
|
PermissionDeniedError,
|
||||||
|
BadAddressError,
|
||||||
|
BlockDeviceRequiredError,
|
||||||
|
DeviceOrResourceBusyError,
|
||||||
|
FileExistsError,
|
||||||
|
CrossDeviceLinkError,
|
||||||
|
NoSuchDeviceError,
|
||||||
|
NotADirectoryError,
|
||||||
|
IsADirectoryError,
|
||||||
|
InvalidArgumentError,
|
||||||
|
FileTableOverflowError,
|
||||||
|
TooManyOpenFilesError,
|
||||||
|
NotATypewriterError,
|
||||||
|
TextFileBusyError,
|
||||||
|
FileTooLargeError,
|
||||||
|
NoSpaceLeftOnDeviceError,
|
||||||
|
IllegalSeekError,
|
||||||
|
ReadOnlyFilesystemError,
|
||||||
|
TooManyLinksError,
|
||||||
|
BrokenPipeError,
|
||||||
|
MathArgumentOutOfDomainOfFunctionError,
|
||||||
|
MathResultNotRepresentableError,
|
||||||
|
ResourceDeadLockWouldOccurError,
|
||||||
|
FileNameTooLongError,
|
||||||
|
NoRecordLocksAvailableError,
|
||||||
|
FunctionNotImplementedError,
|
||||||
|
DirectoryNotEmptyError,
|
||||||
|
TooManySymbolicLinksEncounteredError,
|
||||||
|
NoMessageOfDesiredTypeError,
|
||||||
|
IdentifierRemovedError,
|
||||||
|
ChannelNumberOutOfRangeError,
|
||||||
|
Level2NotSynchronizedError,
|
||||||
|
Level3HaltedError,
|
||||||
|
Level3ResetError,
|
||||||
|
LinkNumberOutOfRangeError,
|
||||||
|
ProtocolDriverNotAttachedError,
|
||||||
|
NoCSIStructureAvailableError,
|
||||||
|
Level2HaltedError,
|
||||||
|
InvalidExchangeError,
|
||||||
|
InvalidRequestDescriptorError,
|
||||||
|
ExchangeFullError,
|
||||||
|
NoAnodeError,
|
||||||
|
InvalidRequestCodeError,
|
||||||
|
InvalidSlotError,
|
||||||
|
BadFontFileFormatError,
|
||||||
|
DeviceNotAStreamError,
|
||||||
|
NoDataAvailableError,
|
||||||
|
TimerExpiredError,
|
||||||
|
OutOfStreamsResourcesError,
|
||||||
|
MachineIsNotOnTheNetworkError,
|
||||||
|
PackageNotInstalledError,
|
||||||
|
ObjectIsRemoteError,
|
||||||
|
LinkHasBeenSeveredError,
|
||||||
|
AdvertiseErrorError,
|
||||||
|
SrmountErrorError,
|
||||||
|
CommunicationErrorOnSendError,
|
||||||
|
ProtocolErrorError,
|
||||||
|
MultihopAttemptedError,
|
||||||
|
RFSSpecificErrorError,
|
||||||
|
NotADataMessageError,
|
||||||
|
ValueTooLargeForDefinedDataTypeError,
|
||||||
|
NameNotUniqueOnNetworkError,
|
||||||
|
FileDescriptorInBadStateError,
|
||||||
|
RemoteAddressChangedError,
|
||||||
|
CanNotAccessANeededSharedLibraryError,
|
||||||
|
AccessingACorruptedSharedLibraryError,
|
||||||
|
LibSectionInAOoutCorruptedError,
|
||||||
|
AttemptingToLinkInTooManySharedLibrariesError,
|
||||||
|
CannotExecASharedLibraryDirectlyError,
|
||||||
|
IllegalByteSequenceError,
|
||||||
|
InterruptedSystemCallShouldBeRestartedError,
|
||||||
|
StreamsPipeErrorError,
|
||||||
|
TooManyUsersError,
|
||||||
|
SocketOperationOnNonSocketError,
|
||||||
|
DestinationAddressRequiredError,
|
||||||
|
MessageTooLongError,
|
||||||
|
ProtocolWrongTypeForSocketError,
|
||||||
|
ProtocolNotAvailableError,
|
||||||
|
ProtocolNotSupportedError,
|
||||||
|
SocketTypeNotSupportedError,
|
||||||
|
OperationNotSupportedOnTransportEndpointError,
|
||||||
|
ProtocolFamilyNotSupportedError,
|
||||||
|
AddressFamilyNotSupportedByProtocolError,
|
||||||
|
AddressAlreadyInUseError,
|
||||||
|
CannotAssignRequestedAddressError,
|
||||||
|
NetworkIsDownError,
|
||||||
|
NetworkIsUnreachableError,
|
||||||
|
NetworkDroppedConnectionBecauseOfResetError,
|
||||||
|
SoftwareCausedConnectionAbortError,
|
||||||
|
ConnectionResetByPeerError,
|
||||||
|
NoBufferSpaceAvailableError,
|
||||||
|
TransportEndpointIsAlreadyConnectedError,
|
||||||
|
TransportEndpointIsNotConnectedError,
|
||||||
|
CannotSendAfterTransportEndpointShutdownError,
|
||||||
|
TooManyReferencesCannotSpliceError,
|
||||||
|
ConnectionTimedOutError,
|
||||||
|
ConnectionRefusedError,
|
||||||
|
HostIsDownError,
|
||||||
|
NoRouteToHostError,
|
||||||
|
OperationAlreadyInProgressError,
|
||||||
|
OperationNowInProgressError,
|
||||||
|
StaleNFSFileHandleError,
|
||||||
|
StructureNeedsCleaningError,
|
||||||
|
NotAXENIXNamedTypeFileError,
|
||||||
|
NoXENIXSemaphoresAvailableError,
|
||||||
|
IsANamedTypeFileError,
|
||||||
|
RemoteIOErrorError,
|
||||||
|
QuotaExceededError,
|
||||||
|
NoMediumFoundError,
|
||||||
|
WrongMediumTypeError,
|
||||||
|
OperationCanceledError,
|
||||||
|
RequiredKeyNotAvailableError,
|
||||||
|
KeyHasExpiredError,
|
||||||
|
KeyHasBeenRevokedError,
|
||||||
|
KeyWasRejectedByServiceError,
|
||||||
|
OwnerDiedError,
|
||||||
|
StateNotRecoverableError,
|
||||||
|
OperationNotPossibleDueToRFKillError,
|
||||||
|
MemoryPageHasHardwareErrorError,
|
||||||
|
DNSServerReturnedAnswerWithNoDataError,
|
||||||
|
DNSServerClaimsQueryWasMisformattedError,
|
||||||
|
DNSServerReturnedGeneralFailureError,
|
||||||
|
DomainNameNotFoundError,
|
||||||
|
DNSServerDoesNotImplementRequestedOperationError,
|
||||||
|
DNSServerRefusedQueryError,
|
||||||
|
MisformattedDNSQueryError,
|
||||||
|
MisformattedDomainNameError,
|
||||||
|
UnsupportedAddressFamilyError,
|
||||||
|
MisformattedDNSReplyError,
|
||||||
|
CouldNotContactDNSServersError,
|
||||||
|
TimeoutWhileContactingDNSServersError,
|
||||||
|
EndOfFileError,
|
||||||
|
ErrorReadingFileError,
|
||||||
|
NameServerOutOfMemoryError,
|
||||||
|
ApplicationTerminatedLookupError,
|
||||||
|
DomainNameIsTooLongError,
|
||||||
|
NameServerCNameLoopError,
|
||||||
|
};
|
||||||
56
src/main.zig
56
src/main.zig
|
|
@ -1,5 +1,6 @@
|
||||||
const std = @import("std");
|
const std = @import("std");
|
||||||
const display = @import("display.zig");
|
const display = @import("display.zig");
|
||||||
|
const i2cnative = @import("i2cnative.zig");
|
||||||
|
|
||||||
// Disabling the image characters. To re-enabel, switch the import back and
|
// Disabling the image characters. To re-enabel, switch the import back and
|
||||||
// adjust build.zig
|
// adjust build.zig
|
||||||
|
|
@ -120,13 +121,11 @@ fn deinit() void {
|
||||||
|
|
||||||
fn processArgs(args: [][:0]u8, line_array: *[display.LINES]*const [:0]u8) !Options {
|
fn processArgs(args: [][:0]u8, line_array: *[display.LINES]*const [:0]u8) !Options {
|
||||||
if (args.len < 2) try usage(args);
|
if (args.len < 2) try usage(args);
|
||||||
const prefix = "/dev/ttyUSB";
|
|
||||||
var opts = Options{
|
var opts = Options{
|
||||||
.device_file = args[1],
|
.device_file = args[1],
|
||||||
.flip = false,
|
.flip = false,
|
||||||
.background_filename = @constCast(""),
|
.background_filename = @constCast(""),
|
||||||
};
|
};
|
||||||
if (!std.mem.eql(u8, opts.device_file, "-") and !std.mem.startsWith(u8, opts.device_file, prefix)) try usage(args);
|
|
||||||
|
|
||||||
var is_filename = false;
|
var is_filename = false;
|
||||||
var line_number: ?usize = null;
|
var line_number: ?usize = null;
|
||||||
|
|
@ -303,8 +302,12 @@ fn sendPixels(pixels: []const u8, file: [:0]const u8, device_id: u8) !void {
|
||||||
if (is_i2cdriver)
|
if (is_i2cdriver)
|
||||||
return sendPixelsThroughI2CDriver(pixels, file, device_id);
|
return sendPixelsThroughI2CDriver(pixels, file, device_id);
|
||||||
|
|
||||||
|
const is_i2cnative = std.mem.startsWith(u8, file, "/dev/i2c");
|
||||||
|
if (is_i2cnative)
|
||||||
|
return i2cnative.sendPixels(pixels, file, device_id);
|
||||||
|
|
||||||
// Send through linux i2c native
|
// Send through linux i2c native
|
||||||
return error.LinuxNativeNotImplemented;
|
return error.UnkownDeviceType;
|
||||||
}
|
}
|
||||||
|
|
||||||
fn sendPixelsToStdOut(pixels: []const u8) !void {
|
fn sendPixelsToStdOut(pixels: []const u8) !void {
|
||||||
|
|
@ -323,7 +326,7 @@ fn sendPixelsToStdOut(pixels: []const u8) !void {
|
||||||
fn sendPixelsThroughI2CDriver(pixels: []const u8, file: [*:0]const u8, device_id: u8) !void {
|
fn sendPixelsThroughI2CDriver(pixels: []const u8, file: [*:0]const u8, device_id: u8) !void {
|
||||||
var pixels_write_command = [_]u8{0x00} ** ((display.WIDTH * display.PAGES) + 1);
|
var pixels_write_command = [_]u8{0x00} ** ((display.WIDTH * display.PAGES) + 1);
|
||||||
pixels_write_command[0] = 0x40;
|
pixels_write_command[0] = 0x40;
|
||||||
packPixelsToDeviceFormat(pixels, pixels_write_command[1..]);
|
display.packPixelsToDeviceFormat(pixels, pixels_write_command[1..]);
|
||||||
var i2c = c.I2CDriver{
|
var i2c = c.I2CDriver{
|
||||||
.connected = 0,
|
.connected = 0,
|
||||||
.port = 0,
|
.port = 0,
|
||||||
|
|
@ -378,51 +381,6 @@ fn sendPixelsThroughI2CDriver(pixels: []const u8, file: [*:0]const u8, device_id
|
||||||
try stdout.print("done\n", .{});
|
try stdout.print("done\n", .{});
|
||||||
}
|
}
|
||||||
|
|
||||||
fn packPixelsToDeviceFormat(pixels: []const u8, packed_pixels: []u8) void {
|
|
||||||
// Each u8 in pixels is a single bit. We need to pack these bits
|
|
||||||
for (packed_pixels, 0..) |*b, i| {
|
|
||||||
const column = i % display.WIDTH;
|
|
||||||
const page = i / display.WIDTH;
|
|
||||||
|
|
||||||
// if (column == 0) std.debug.print("{d}: ", .{page});
|
|
||||||
// pixel array will be 8x as "high" as the data array we are sending to
|
|
||||||
// the device. So the device column above is only our starter
|
|
||||||
// Display has 8 pages, which is a set of 8 pixels with LSB at top of page
|
|
||||||
//
|
|
||||||
// To convert from the pixel array above, we need to:
|
|
||||||
// 1. convert from device page to a base "row" in the pixel array
|
|
||||||
const row = page * display.PAGES;
|
|
||||||
// 2. We will have 8 rows for each base row
|
|
||||||
// 3. Multiple each row by the width to get the index of the start of
|
|
||||||
// the row
|
|
||||||
// 4. Add our current column index for the final pixel location in
|
|
||||||
// the pixel array.
|
|
||||||
//
|
|
||||||
// Now that we have the proper index in the pixel array, we need to
|
|
||||||
// convert that into our destination byte. Each index will be a u8, either
|
|
||||||
// 0xff for on or 0x00 for off. So...
|
|
||||||
//
|
|
||||||
// 1. We will take the value and bitwise and with 0x01 so we get one bit
|
|
||||||
// per source byte
|
|
||||||
// 2. Shift that bit into the proper position in our destination byte
|
|
||||||
|
|
||||||
b.* = (pixels[(0 + row) * display.WIDTH + column] & 0x01) << 0 |
|
|
||||||
(pixels[(1 + row) * display.WIDTH + column] & 0x01) << 1 |
|
|
||||||
(pixels[(2 + row) * display.WIDTH + column] & 0x01) << 2 |
|
|
||||||
(pixels[(3 + row) * display.WIDTH + column] & 0x01) << 3 |
|
|
||||||
(pixels[(4 + row) * display.WIDTH + column] & 0x01) << 4 |
|
|
||||||
(pixels[(5 + row) * display.WIDTH + column] & 0x01) << 5 |
|
|
||||||
(pixels[(6 + row) * display.WIDTH + column] & 0x01) << 6 |
|
|
||||||
(pixels[(7 + row) * display.WIDTH + column] & 0x01) << 7;
|
|
||||||
|
|
||||||
// std.debug.print("{s}", .{std.fmt.fmtSliceHexLower(&[_]u8{b.*})});
|
|
||||||
// if (column == 127) std.debug.print("\n", .{});
|
|
||||||
|
|
||||||
// Last 2 pages are yellow...16 pixels vertical
|
|
||||||
// if (page == 6 or page == 7) b.* = 0xff;
|
|
||||||
// b.* = 0xf0;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
fn i2cWrite(i2c: *c.I2CDriver, bytes: []const u8) !void {
|
fn i2cWrite(i2c: *c.I2CDriver, bytes: []const u8) !void {
|
||||||
var rc = c.i2c_write(i2c, @ptrCast([*c]const u8, bytes), bytes.len); // nn is size of array
|
var rc = c.i2c_write(i2c, @ptrCast([*c]const u8, bytes), bytes.len); // nn is size of array
|
||||||
if (rc != 1)
|
if (rc != 1)
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue
Block a user