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...

Question : How to use the hardware 2D acceleration feature on MA35D1? Answer. You can enable and test the hardware 2D acceleration feature on MA35D1 by enabling the " directfb " package in Buildroot. Target packages > Graphic libraries and applications (graphic/text) > [*] directfb [*] directfb exa...

Question : U-Boot Fails to recognize NAND(not Winbond NAND) Answer. When using NAND S34ML08G3 on the development board, U-Boot fails to recognize it during the first boot. However, upon pressing the reset button and performing a U-Boot reset, it is able to recognize the NAND flash during the second...

Question : SPI-Config Issue Answer. Configure the SPI speed If you use the spi-config tool to configure the SPI speed, once you close the device, the SPI device speed will be restored to its maximum frequency. We recommend that you set the speed setting as desired in the device tree, as shown below...