If you mustuse. NET System. IO. Ports. Serial. Port Hardware, Software Product Development. As an embedded developer who writes desktop software mostly for configuration of, and data download from, peripheral devices, I use serial data streams a lot. Mostly USB virtual serial posts from FTDI, but also the USB Communication Device Class and real 1. UARTs on the PCI bus. Since looking at data through an in circuit emulator debug interface is generally    a miserable experience, getting serial data communication with a custom PC application is essential to analyzing data quality and providing feedback on hardware designs. C and the. NET Framework provide a rapid application development that is ideal for early development that needs to track changing requirements as hardware designs evolve. Ideal in most respects, I should say. Mfc100u.Dll File For Windows 7. The System. IO. Ports. Serial. Port class which ships with. NET is a glaring exception. To put it mildly, it was designed by computer scientists operating far outside their area of core competence. They neither understood the characteristics of serial communication, nor common use cases, and it shows. Nor could it have been tested in any real world scenario prior to shipping, without finding flaws that litter both the documented interface and the undocumented behavior and make reliable communication using System. Simple circuits and examples to describe how to use PC parallel port as general purpose output port. Tabtight professional, free when you need it, VPN service. IO. Ports. Serial. Port henceforth IOPSP a real nightmare. Plenty of evidence on Stack. Overflow attests to this, from devices that work in Hyperterminal but not. NET because IOPSP makes setting certain parameters mandatory, although they arent applicable to virtual ports, and closes the port on failure. Theres no way to bypass or ignore failure of these settings during IOPSP initialization. Whats even more astonishing is that this level of failure occurred when the underlying kernel. APIs are immensely better Ive used the Win. API before working with. NET, and still do when I want to use a function that. Delphi 7 Serial Port Example' title='Delphi 7 Serial Port Example' />As an embedded developer who writes desktop software mostly for configuration of, and data download from, peripheral devices, I use serial data streams a lot. Freeware Delphi components, open source Delphi libraries, databases, script engines, middleware, internet components, communication libraries, tutorials, etc. CPM, originally standing for Control ProgramMonitor and later Control Program for Microcomputers, is a massmarket operating system created for Intel 808085based. NET doesnt have a wrapper for, which notably includes device enumeration. The. NET engineers not only failed to devise a reasonable interface, they chose to disregard the Win. API design which was very mature, nor did they learn from two decades of kernel team experience with serial ports. A future series of posts will present the design and implementation of a rational serial port interface built upon, and preserving the style of, the Win. API serial port functions. It fits seamlessly into the. NET event dispatch model, and multiple coworkers have expressed that its exactly how they want a serial port class to work. But I realize that external circumstances sometimes prohibit using a CCLI mixed mode assembly. The CCLI solution is incompatible with Partial trust not really a factor, since IOPSPs Open method also demands Unmanaged. Delphi 7 Serial Port Example' title='Delphi 7 Serial Port Example' />Code permissionSingle executable deployment there may be workarounds involving ILMerge or using netmodules to link the C code into the CCLI assemblyDevelopment policies that prohibit third party projects. NET Compact Framework no support for mixed mode assembliesThe public license as yet undetermined might also present a problem for some users. Or maybe you are responsible for improving IOPSP code that is already written, and the project decision maker isnt ready to switch horses. This is not a good decision, the headaches IOPSP will cause in future maintenance far outweigh the effort of switching, and youll end up switching in the end to get around the unfixable bugs. So, if you fall into one of these categories and using the Base Class Library is mandatory, you dont have to suffer the worst of the nightmare. There are some parts of IOPSP that are a lot less broken that the others, but that youll never find in MSDN samples. Unsurprisingly, these correspond to where the. NET wrapper is thinnest. That isnt to say that all the bugs can be worked around, but if youre lucky enough to have hardware that doesnt trigger them, you can get IOPSP to work reliably in limited ways that cover most usage. I planned to start with some guidance on how to recognize broken IOPSP code that needs to be reworked, and thought of giving you a list of members that should not be used, ever. But that list would be several pages long, so instead Ill list just the most egregious ones and also the ones that are safe. The worst offending System. IO. Ports. Serial. Port members, ones that not only should not be used but are signs of a deep code smell and the need to rearchitect all IOPSP usage The Data. Received event 1. The Bytes. To. Read property completely unreliableThe Read, Read. Existing, Read. Line methods handle errors completely wrong, and are synchronousThe Pin. Changed event delivered out of order with respect to every interesting thing you might want to know about itMembers that are safe to use The mode properties Baud. Rate, Data. Bits, Parity, Stop. Bits, but only before opening the port. And only for standard baud rates. Hardware handshaking control the Handshake property. Port selection constructors, Port. Name property, Open method, Is. Open property, Get. Port. Names method. And the one member that no one uses because MSDN gives no example, but is absolutely essential to your sanity The only serial port read approaches that work correctly are accessed via Base. Stream.   Its implementation, the System. IO. Ports. Serial. Stream class which has internal visibility you can only use it via Stream virtual methods is also home to the few lines of code which I wouldnt choose to rewrite. Finally, some code. Heres the wrong way the examples show to receive data. Data. Received portData. Received. later, in Data. Received event. byte buffer new byteport. Bytes. To. Read. Readbuffer, 0, buffer. Length. raise. App. Serial. Data. Eventbuffer. IOException exc. App. Serial. Errorexc. Data. ReceivedportData. Received later, in Data. Received event    bytebuffernewbyteport. Bytes. To. Read    port. Readbuffer,0,buffer. Length    raise. App. Serial. Data. Eventbuffer    handle. App. Serial. Errorexc Heres the right approach, which matches the way the underlying Win. API is intended to be used. Limit. Action kickoff. Read null. kickoff. Read delegate. Base. Stream. Begin. Readbuffer, 0, buffer. Length, delegate IAsync. Result ar. int actual. Length port. Base. Stream. End. Readar. Length. Buffer. Block. Copybuffer, 0, received, 0, actual. Length. raise. App. Serial. Data. Eventreceived. IOException exc. App. Serial. Errorexc. Read. kickoff. Read bytebuffernewbyteblock. Limit    port. Base. Stream. Begin. Readbuffer,0,buffer. Length,delegateIAsync. Result ar            intactual. Lengthport. Base. Stream. End. Readar            bytereceivednewbyteactual. Length            Buffer. Block. Copybuffer,0,received,0,actual. Length            raise. App. Serial. Data. Eventreceived            handle. App. Serial. Errorexc It looks like a little bit more, and more complex code, but it results in far fewer pinvoke calls, and doesnt suffer from the unreliability of the Bytes. To. Read property. Yes, the Bytes. To. Read version can be adjusted to handle partial reads and bytes that arrive between inspecting Bytes. To. Read and calling Read, but those are only the most obvious problems. Starting in. NET 4. Read. Async on the Base. Stream object, which calls Begin. Read and End. Read internally. PIC1. 6BOOTLOAD PIC1. F8. 7x bootloader. Introduction Features Download Hardware Troubleshooting Frequently Asked Questions FAQ Photos. Overview. A bootloader is used to quickly download a new program into your PIC micro, in a few seconds. Update 2. 01. 6 0. Code is now on Git. Hub. Once you have it set up, you can quickly update the. PIC micro with a single keystroke. NOTE You cannot use this bootloader without first programming the bootstrap hex file into the PIC using a hardware chip programmer This programming step only has to be performed once. This boostrap program talks to the Windows software and allows the chip to accept a new program. Over the last 1. 0 years, over 7. There an estimated 5,0. PIC1. 6 based units which are currently using this bootloader. Bootloading is easily performed in circuit, without having to remove the PIC micro from the PCB. No modification to your circuit board is required for the basic implementation. Supports Windows, Linux native and under Java, and DOS. This bootloader has been ported to the PIC1. F1. 32. 0. A 1. 8Fx. Page Map. How to use the bootloader. You start with your application circuit, complete with a 1. F8. 7x or 1. 6F8. A. Program the PIC micro in your target circuit with the bootloader code. This is a once off operation. A programmer is needed for this task see the ICD2 from www. Plug in the RS2. 32 serial adapter to your PC. PIC micro. Add an extra line in your program to reserve the top 2. Full Instructions provided. Click the Write button on the Windows software, then reset your target circuit. The bootloader remains active for 0. You can optionally set your IDEeditor to auto load the compiled Hex file into the PIC1. F8. 7x, using the command line options for the Windows software. Hint We recommend IBM data deduplication to protect your source code. Hello Shane,Saw your bootloader page Working. Tex on Sunday, wired the max. Monday morning at 0. AM and had downloaded my first program into an F8. By the end of the day, I came to realize that this is by far one of the best time savers Ive come across in the last 5 years Thanks for an extremely detailed description and once again, thank you for making Petr Kolomazniks small and powerful bootloader available. Fritz Braun Jr. Melbourne, Fl USAwww. Features. PIC1. 6F8. Used successfully by thousands of users worldwide. Compatible with the 1. F8. 7013467 and 1. F8. 76, 1. 6F8. 76. A, 1. 6F8. 77, 1. F8. 77. A. 2. 55 instructions long, fits into top of memory. Only uses two wires TX and RX. This is unlike some bootloaders that need up to 5 wiresExample Hex files for 1. F8. 7013467 and the A revisions. It is possible to run 1. F7. 3467. hex files on the appropriate 1. F8. 7013467 chip. Example Hex files for 3. Mhz. Downloads at 1. This takes a few seconds for a complete program. Program Mastering C Venugopal Pdf. Writes to EEPROM. Supports any Hex file, including those from standard assemblers, Basic, C and Pascal compilers. Circuit diagram supplied as a. Protel 9. 9. sch file. Full source code supplied for bootloader, in assembly and C. Compatible with any circuit no trigger pins or jumpers needed to activate bootloader. Fits into memory locations that the MPLab ICD an In. Circuit Debugger would normally use, if present. Includes Petr Kolomazniks excellent windows interface plus full Delphi source code. Supports DOS or Linux under a DOS emulator. See instructions at the base of this page. Source code in assembly provided. Many thanks to Petr Kolomaznik. See his bootloader page. Testimonials. More user testimonials. Hardware. To use the bootloader, you will need an adapter, which plugs between the COM port of your computer and the PIC microprocessor. A serial adapter converts the RS2. TTL levels, 1. 3V to 5. V and 1. 3V to 0. V. The PIC reads these TTL levels into its hardware serial port. Feel free to make an adapter up yourself. Circuits for PIC RS2. PICLIST. Note that you need serial conversion that is compatible with the hardware UART in a PIC, which requires some form of level inversion. A simple resistor circuit will not do, but a MAX2. See PICLIST RS2. 32 conversion circuits. This hardware circuit diagram is supplied with the distribution download, as a. Protel 9. 9. sch file. For the Protel 9. Original Message From Michael. To Shane Tolmie. Subject Re 1. F8. Shane I just gotta tell you again how kickass this is. I remember when I switched from EPROM based PICs to a flash based 1. F8. 77, and I was utterly thrilled with how much faster I could reprogram the device after recompiling my code. Its like that all over again now takes me only 5 seconds to download the code to the PIC while its on the breadboard no more taking out the chip, putting it into the programmer, waiting forever for MPLAB to burn it. Michael. Download Bootloader for WindowsLinuxEmbedded LinuxDOSArchive contains executables,. Download latest version from Git. Hub. old Download Shane Tolmie PIC1. F8. 7x. A bootloader v. Kb. with added support for compatibility with Linux running on an embedded MIPS processor from http www. Now you can program your a PIC straight from embedded linux board without the use of a PC. Download Shane Tolmie PIC1. F8. 7x. A bootloader v. Kb with added PICC LITE compatibility. Download Shane Tolmie PIC1. F8. 7x. A bootloader v. Kb with added notes on potential data corruption due to BOR. Download Shane Tolmie PIC1. F8. 7x. A bootloader v. Kb with 1. 6F8. 7x. A quad alignment bug fixed. Previous versions are available. Any questionsenquiries about the bootloaderIt worked beautifully or didnt work at all Email me on supportmicrochipc. Troubleshooting. If you have any problems, see the troubleshooting FAQ or the step by step quick start. Compatibility List. Check if your compiler assembler is compatible. If you find that the bootloader works on a compilerassembler not listed in the list, please email supportmicrochipc. I can update the list. Thanks How to port the bootloader to a different microcontroller the 1. F6. 28I cant do the work for you, but here are some hints to get you started Step 1 Get the UART working on the 1. F6. 28 i. e. Get it talking via RS2. In the source code, see the directory hex files for testing serial comms on PIC. Open the C source, compile it, get it working. Step 2 Work out the difference in memory size between the 1. F6. 28 and the 1. F8. 76. Step 3 Adjust the assembly, andor the assembly origin, to move the place where the bootloader resides to the top 2. Step 4 Adjust the Windows source so that if a program is too large to fit into the flash, and will overwrite the bootloader, it will give a warning. Hint 1 You cant use the ICD debugger to test the code. This is because the ICD debugger inserts a flash kernel into the top of memory, to help with debugging and the ICD debugger will overwrite the bootloader. It just doesnt work. Hint 2 To test it, do as much alteration as you can, then program the. F6. 28. Then, read it back you should see the bootloader residing in the top 2. Hint 3 To test it, attempt a bootload, then see if the code has been loaded properly. Hint 4 To test it, write the target. F6. 28, read it out, then do a byte by byte compare to the results to what you got in Hint 3. Hint 5 The first 4 bytes of the.