Question : Use aarch64-openwrt-linux-gcc to compile AP code in openwrt. Error: function is not implemented . Answer. Go to Github to grab the latest OpenWRT for testing. The operation process is as follows: The usage is similar to Buildroot, the steps are as follows: 1. Enter to “$TOPDIR/staging_di...

Question : Add GPIO-Line-Name Answer. Assuming that GPIO0~GPIO7 are named " test0...test7 " respectively, they need to be configured in ma35d1.dtsi. The relevant configuration is as follows: gpioa: gpioa@40040000 { reg = <0x0 0x40040000 0 0x40>, <0x0 0x40040800 0 0x40>; interrupts = <GIC_SPI 14 IRQ...

Question : Using the MA35 M4 development platform, the same code compiles to a bin file of 90kb. However, after compiling with nueclipse, the file size exceeds 1mb. How can I configure the compilation options to reduce the size after compiling? Answer. You can use the following commands to reduce t...

Platform: MA35D1 Platform resource link: https://www.nuvoton.com/products/microprocessors/arm-cortex-a35-mpus/ma35d1-high-performance-edge-iiot-series/design-resource/ BSP link: https://github.com/OpenNuvoton/MPU-Family Download link: MA35D1 GUI QT Development Environment_Rev1.00.pdf.zip Brief: 1.Di...

Platform: MA35D1 Platform resource link: https://www.nuvoton.com/products/microprocessors/arm-cortex-a35-mpus/ma35d1-high-performance-edge-iiot-series/design-resource/ BSP link: https://github.com/OpenNuvoton/MPU-Family Download link: MA35D1 emWin AppWizard Quick Start_v1.0.pdf.zip Brief: How to use...

Question : Understand IMAGE_INSTALL Library in Yocto Build System Answer. IMAGE_INSTALL is a variable in the Yocto build system. It is used to specify the list of packages to be installed in the generated image. The variable is set in the image recipe file ( .bb file ). The IMAGE_INSTALL variable i...

Question : MA35D1_LQFP216 change DDR size from 128MB to 256/512MB Cannot work on NuMaker-IOT-MA35D1 EVB Board Answer. Package MA35D1_ LQFP216 : MA35D16F787C use internal DDR2_128MB MA35D16F887C use internal DDR3L_256MB MA35D16F987C use internal DDR3L_512MB Please sure supply voltage of MVDD is 1.35...

Question : How to display the current directory in buildroot's rootfs? Answer. Modify /etc/profile and add the following definitions: HOSTNAME='/bin/hostname' PS1='[\u@\w]#' export PS1 HOSTNAME After restarting, the prompt will be in the following format: [username@current_path]# [root@/etc/profile...

Question : NAND cannot boot without SPI-NAND Answer. The boot failure issue after removing SPI-NAND has been resolved by disabling it in the device tree. By adding the following code to MA35D1_Buildroot\output\build\uboot-custom\arch\arm\dts\ma35d1.dts , SPI-NAND is disabled. &qspi0 { spi-nand@0 { ...

Question : I2C0 Interface on MA35D1 IoT EVB cannot work Answer. I2C0 is originally reserved for PMIC usage, so it requires modifying the device tree entries for TFA as follows. Please configure it as shown below. The modification to the " ma35d1.dtsi " file in " output/build/arm-trusted-firmware-cu...