LPC FAQ

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发表问题

How can I verify the configured CAN bitrate, using an oscilloscope?

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Embedded remote procedure call (eRPC)

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LPC1347 USB Control Transfer

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Where to get LPC mcu ROHS report?

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emWin支持哪些编译器/IDE？

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The CAN controller goes into bus off mode when my application tries to send a CAN message. There is no activity on the CAN bus. Why?

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I see error frames on the CAN bus whenever my code starts up, before the CAN controller is initialized. What is a common reason for this?

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How can I test the CAN peripheral and driver without a CAN transceiver and CAN bus connected?

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Why does CAN0 work and CAN1 not work? Do I need another node to test my code?

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Can I wake up the part on CAN bus activity?

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What is the difference between error active and error passive?

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How do I detect there is no CAN bus connected?

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Can I send a message with X/Y/Z bits in the ID?

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How is the transmit error counter reset?

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What is the sample point for?

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How do the error counters work?

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What are the benefits of integrated CAN transceivers?

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What is CAN-FD?

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How to detect and handle bus off?

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How does the acknowledge and error detection system work?

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Why are no messages being transmitted?

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Why are no messages being received?

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How to calculate BRP for specific clock frequency and specific bit rate?

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How to autobaud. I.e how to measure the bit rate of a network?

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LPC2300 and LPC2400 Rev B to Rev D change Ethernet and Code execution

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运行于恩智浦微控制器的emWin软件是否做了优化？

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运行emWin需要使用多少内存？

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运行于恩智浦微控制器的emWin软件是否做了优化？

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试用恩智浦微控制器的客户如何获得emWin软件？

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获得免费许可的emWin软件能否用于不具有LCD控制器的恩智浦MCU？比如那些具有使用其自身帧缓冲区的LCD面板的MCU？

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生成Swim兼容的字体文件

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有关lpc1788的u-boot-2011.06！

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是否有emWin可用的板支持包（BSP）？

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我如何收到emWin软件的更新通知？

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我可以获得emWin的源代码吗？

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我可以在LPC1788的uCLinux中将emWin用作图形显示库吗？

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对emWin的开源应用是否有限制？

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如果我不使用RTOS，emWin还能否作为一个独立库使用？

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如何在emWin库中编写一个新的驱动来支持新的LCD面板？

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哪些恩智浦微控制器可获得免费emWin许可？

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免费使用emWin有什么限制？

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使用emWin需要签订什么许可吗？

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emWin软件是如何集成在恩智浦开发板上的？

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emWin是否支持触控面板？

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emWin是否支持亚洲/俄罗斯/希腊或其他语言的字体？

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emWin是否包含一个模拟器，让图形设计人员可以在无评估板的情况下进行设计？

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emWin支持的最大显示分辨率是多少？

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Is there any G.729 codec implemented for any Cortex-M3 cores?

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If the LCD controller has a lower priority on the EMC bus, refreshes will be stalled. How noticable is this on the screen?

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LPCOpen debug input/output support

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How can I change the orientation (landscape/portrait) of a SWIM project?

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Is the LPC1788 pin compatible with the LCP2478?

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How is the LPC2478 32-bit External Memory Controller different than the LPC1788 32-bit External Memory Controller?

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about the u-boot-2011.06 for lpc1788!

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Where can I find more information regarding the LPC175x/6x Flash erase/program time?

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Which Cortex-M CPU revision is implemented in NXP microcontrollers?

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Will an increase in clock speed show up in the current-drain of any of the low-power modes?

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We are using a voltage divider circuit to the ADC Vref, but seeing a leakage resistance to ground. Is it safe?

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What are the various ways the LPC17xx can be woken up from a low power mode?

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What is the importance of the internal regulators on LPC176x? Specifically, what is the accuracy of the internal regulators?

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What is the maximum toggle rate on external SPI/SSP pins for LPC17xx?

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What is the required accuracy for the regulator input to the LPC17xx?

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What is the significance of Ethernet Symbol Error bit on LPC1768 in Receive Status Information in the User’s Manual? The description of this bit states that “The PHY reports a bit error over the PHY interface during reception

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When using RTC, where should I tie VSSA and VSS on 17xx?

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The static current measurement on VDDA of LPC175x is around 2mA when ADC 12bit is enabled. Is this normal?

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In the case where a UART Framing error occurs, is it possible to Reset/Restart the UART core after detecting this Framing error?

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Is possible to reset a Cortex-M3 microcontroller in software?

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Is there a feature to do error correction for UARTs on LPC17xx?

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Is there a number we can use for uA/MHz on the LPC17xx? I am currently running at 25MHz, and would want to increase to approximately 48MHz, but I am not sure how current-drain will be impacted.

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Is there a power supply sequence for LPC17xx?

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Is there an LPC17xx IAP example?

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Has FatFS been ported to the LPC17xx?

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How can software detect that the external oscillator does not work, and it should use the internal RC oscillator instead, and report this as an error?

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How long can short-circuit output current flow before damaging the microcontroller?

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How should the VBAT and RTCX1 pins on LPC17xx be configured when the RTC is not used?

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I have an LPCXpresso LPC1768 board. Can I use OpenOCD to debug the target?

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I need BSDL files for 176x / 175x. Where can I find one?

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Does the LPC17xx family of microcontrollers comply with IEC60335 safety standards?

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Does CRP restrict IAP Flash entry points, i.e. can the application program the Flash even when CRP is enabled?

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Do you have a secondary USB bootloader for LPC17xx?

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Do the typical Brown-out Detection (BOD) voltages have any tolerance?

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Do the CAN controllers on LPC17xx have a Time Stamp function?

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DMAReqSel on LPC17xx indicates UART0/MAT0.0, can both be used simultaneously to trigger a DMA request?

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Can the TC register and MRn register be written to while the timer is running?

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Can the RTC output be used for PLL0 input?

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An LPC1751 is programmed using CRP1, but Flash Magic (http://www.flashmagictool.com/) shows the CRP is disabled and can read the memory contents.

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Is there any port for an NXP Cortex evaluation board that support the .Net Micro Framework? Is NXP or any third party supporting the .NET Micro Framework?

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Why the USB Secondary Boot Loader from AN10866 doesn't work on Linux / Mac PCs ?

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Is there any G.729 codec implemented for any Cortex-M3 cores?

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Do the LPC17xx and LPC18xx have USB Flash loader like the LPC1343?

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Are there any DSP libraries available for the Cortex-M3 microcontrollers?

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When I start debugging (using LPCXpresso, Keil, IAR), I noticed that my program started in the bootROM area (0x1FFF_xxxx) although the program download is done and verification is correct

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The datasheet mentions that the SCL0 and SDA0 pins require external pull-ups regardless of PINMODE / IOCONF / PINSEL configuration. But on SCL1, SDA1, SCL2, and SDA2 look to be able to use an internal pull-up ?

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How do I configure Lpcxpresso to place code in RAM?

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What platforms are supported by LPCXpresso?

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The datasheet mentions the I/O pins are 5V tolerant if Vdd is present. Can you explain in detail what this implies?

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How to calculate the value of crystal load capacitors?

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After a software reset like WD reset, BOD reset, is the SRAM content retained?

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What are the Code Read Protect (CRP) levels on the LPC17xx?

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How many breakpoints and watchpoints are supported on LPC17xx and other Cortex-M3 devices?

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When using LPC23xx or LPC24xx Rev B silicon, the Ethernet worked fine, however, when we switched to Rev D silicon, the Ethernet interface is no longer working.

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Is it possible to use both the USB device and Ethernet on LPC1758, since MDIO and USB_connect are shared? Is there a possible workaround?

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How can I identify the Ethernet MAC ID to differentiate between 23xx/24xx/17xx?

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Ethernet operation when the MAC is operated at a tenth (5MHz) of the expected speed.

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Are there Ethernet bootloaders available for LPC1700 and LPC2300/2400? If so, where can I find it?

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Is anything about the emWin software optimized to run on NXP microcontrollers?

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How much memory will be used running emWin?

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Who will provide the emWin software support? NXP or Segger?

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How does a customer evaluating an NXP MCU get access to the emWin software?

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Can the free licensed emWin software be used with NXP MCUs that do not have an LCD controller, i.e. with LCD Panels with their own frame buffers?

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Where can I find SWIM-compatible fonts?

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How do I receive notification of updates to the emWin software?

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Can I get the emWin source code?

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Can I use emWin as a graphic display library in uCLinux on LPC1788?

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If I don’t use an RTOS, can emWin still work as a standalone library?

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How do you write a new driver in the emWin library to support a new LCD panel?

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Is the emWin license available for all NXP Microcontrollers?

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What are the limitations for using emWin for free?

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For emWin, are there any licenses to be signed?

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Will using a 16-bit external bus be too slow for LCD, causing tearing to occur?

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Why are all my colors wrong in SWIM?

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Which Compilers/IDEs does emWin support ?

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What is the maximum display resolution that emWin can support?

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What exactly is SWIM?

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0 条回复 1944 次查看

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Is there dedicated on-board SRAM memory specifically for the frame buffer?

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Is there a list of TFT LCD alternatives to the development kit's LCD?

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Is the LCD DMA located in the LCD macrocell or the GP DMA ?

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Is the frame buffer inside the 1788 or in an external device?

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Is it feasible to run the LPC1788 at 1024x768 at 24bpp? Or, does the bus width mitigate the maximum resolution at 24bpp and/or maximum color depth at 1024x768?

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If we use OLED LCDs, will the interface would be the same?

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0 条回复 1517 次查看

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How to use touchscreen support of LCD Logicpd 4.3'' WQVGA and LPC1850?

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How to use swim_put_image function in the code?

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How is the emWin software being incorporated into the NXP development boards?

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Does emWin support touch panels?

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Does emWin support Asian/Russian/Greek or other language fonts?

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Does emWin include a simulator which graphic designer can design without evaluation board?

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0 条回复 1815 次查看

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Do you have size limit or memory size calculator to help set the size of the frame buffer?

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Assuming I am using the EMC for both accessing the LCD buffer and external flash, where I have my executable code stored, how will execution time be affected?

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Are there restrictions with emWin on open source usage?

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Are there Board Support Packages (BSP’s) available for emWin?

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Are the LCD controller signals LVDS?

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Is the LCD DMA a gather scatter DMA ? Where is it located exactly ?

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What can be done to improve the accuracy of ADC readings?

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Is there a Signal-to-Noise Ratio (SNR) specification for the LPC1700 ADC?

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Is it possible to sample two analog signals at the same time on a Cortex-M3 device?

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"Malloc failure" using FreeRTOS heap3.c with LPCXpresso tool chain

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0 条回复 2777 次查看

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How are LPCOpen releases named?

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How do I port LPCOpen to a new board?

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How do LPCOpen applications handle system startup?

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How to enable "Long File Name" support in FAT file system included with LPCOpen?

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How to run Multicore examples provided in LPCOpen LPC43xx packages?

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How to use SCT as a standard PWM using LPCOpen?

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0 条回复 5450 次查看

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What include paths, library paths, and sources files do I need for a LPCOpen project?

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0 条回复 6592 次查看

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What is the best way to develop with LPCopen to avoid change impact to LPCopen version updates?

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