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volatile int timer_n = 0;


void timer_handler (void) {
    timer_n++;
}

timer_handler:
    lui     a0, %hi(timer_n)
    lw      a1, %lo(timer_n)(a0)
    addi    a1, a1, 1
    sw      a1, %lo(timer_n)(a0)
    ret


__attribute__((interrupt))
void timer_handler (void) {
    timer_n++;
}

timer_handler:
    addi    sp, sp, -16
    sw      a0, 12(sp)                      # 4-byte Folded Spill
    sw      a1, 8(sp)                       # 4-byte Folded Spill
    lui     a0, %hi(timer_n)
    lw      a1, %lo(timer_n)(a0)
    addi    a1, a1, 1
    sw      a1, %lo(timer_n)(a0)
    lw      a0, 12(sp)                      # 4-byte Folded Reload
    lw      a1, 8(sp)                       # 4-byte Folded Reload
    addi    sp, sp, 16
    mret

__attribute__((interrupt))
void timer_handler (void) {
    int mepc, mstatus;

    asm("csrr %0, mepc\n\t"
        "csrr %1, mstatus\n\t"
        "csrsi mstatus, 8"      // mstatus.MIE = 1, interrupt enable
        : "=r" (mepc), "=r" (mstatus));

    // ISR code

    asm("csrci mstatus, 8\n\t"  // mstatus.MIE = 0, interrupt disable
        "csrw mepc, %0\n\t"
        "csrw mstatus, %1"
        : : "r" (mepc), "r" (mstatus));
}

[debug] Software Version: "1.3.4"
[debug] Machine Name: "WMX-PC"
[debug] System Name: "Windows 10 (10.0)"
[debug] CPU Architecture: "x86_64" 

[debug] Parse the image header from "C:/Users/WMX/Desktop/d211_demo100_nand_page_2k_block_128k_v1.0.0.img"
[debug] Soc type: "d211"
[debug] Board type: "demo100_nand_page_2k_block_128k"
[debug] Image version: "1.0.0"
[debug] Storage type: "spi-nand"
[debug] Storage ID: "P=2K,B=128K"
[debug] Meta count: "13" 

[debug] Refresh the partition tree ...
[debug] Part name: image.target.spl , size: 128528 
[debug] Part name: image.target.uboot , size: 826603 
[debug] Part name: image.target.env , size: 16384 
[debug] Part name: image.target.logo , size: 141709 
[debug] Part name: image.target.kernel , size: 7721688 
[debug] Part name: image.target.recovery , size: 10173439 
[debug] Part name: image.target.rootfs , size: 29585408 

[debug] Current connect type: 0
[debug] There are "1" device available

[debug] Try to connect the ArtInChip device "1:2" ...
[debug] Try to get Usb device hd info...
[debug] Get Usb device hd info success
[debug] The status of ArtInChip device: true
[debug] Start burn online ...
[debug] Progress range: 0 ~ 49743872

[debug] Burn Image file "C:/Users/WMX/Desktop/d211_demo100_nand_page_2k_block_128k_v1.0.0.img" ... 

[debug] Meta 0 image.updater.ddr , size 27408 ...
[debug] Blocksize 4 , chunk 1048576 * 0 , rest 27408
[debug] Offset: 8704 Size: 27408
[debug] Dev "1:2" Send the rest data 27408
[debug] Don't check the result of image.updater.ddr

[debug] Meta 1 image.updater.env , size 16384 ...
[debug] Blocksize 4 , chunk 1048576 * 0 , rest 16384
[debug] Offset: 37376 Size: 16384
[debug] Dev "1:2" Send the rest data 16384

[debug] Meta 2 image.updater.uboot , size 826603 ...
[debug] Blocksize 4 , chunk 1048576 * 0 , rest 826603
[debug] Offset: 53760 Size: 826603
[debug] Dev "1:2" Send the rest data 826603

[debug] Meta 3 image.updater.logo , size 141709 ...
[debug] Blocksize 4 , chunk 1048576 * 0 , rest 141709
[debug] Offset: 881152 Size: 141709
[debug] Dev "1:2" Send the rest data 141709

[debug] Meta 4 image.updater.spl , size 128528 ...
[debug] Blocksize 4 , chunk 1048576 * 0 , rest 128528
[debug] Offset: 1024512 Size: 128528
[debug] Dev "1:2" Send the rest data 128528
[debug] Don't check the result of image.updater.spl

[debug] Meta 5 image.info , size 2048 ...
[debug] Blocksize 4 , chunk 1048576 * 0 , rest 2048
[debug] Offset: 0 Size: 2048
[debug] Dev "1:2" Send the rest data 2048

[debug] Meta 6 image.target.spl , size 128528 ...
[error] The status of device "1:2" error
[warn ] Try to resend firmware component image.target.spl , try count: 1
[warn ] Try to recovery the connection
[warn ] Resend firmware component: image.target.spl
[error] The status of device "1:2" error
[debug] Update "fail_cnt" of "2023-12-16"

(vexe) D:\Python38\vexe\Scripts>pyocd cmd -t stm32f412xe
0001519 E Error while initing target: Unexpected ACK value (5) returned by probe [commander]

/usr/bin/install -D -m 0644 /mnt/d/Program/Ubuntu/buildroot/output/host/aarch64-buildroot-linux-uclibc/sysroot/usr/share/terminfo/a/ansi /mnt/d/Program/Ubuntu/buildroot/output/target/usr/share/terminfo/a/ansi
/usr/bin/install: cannot stat '/mnt/d/Program/Ubuntu/buildroot/output/host/aarch64-buildroot-linux-uclibc/sysroot/usr/share/terminfo/a/ansi': No such file or directory

root@wmxpc:~/win/buildroot# ls /mnt/d/Program/Ubuntu/buildroot/output/host/aarch64-buildroot-linux-uclibc/sysroot/usr/share/terminfo/
31  34  37  41  4d  51  62  65  68  6b  6e  71  74  77
32  35  38  45  4e  58  63  66  69  6c  6f  72  75  78
33  36  39  4c  50  61  64  67  6a  6d  70  73  76  7a

git clone https://github.com/buildroot/buildroot.git
git clone https://github.com/flatmax/buildroot.rockchip.git

cd buildroot
make BR2_EXTERNAL=../buildroot.rockchip rockpis_defconfig

make menuconfig
# Toolchain 下 GCC compiler Version 由 gcc 10.x 改为 gcc 9.x

make

fakeroot_1.25.3.orig.tar.gz: OK (sha256: 8e903683357f7f5bcc31b879fd743391ad47691d4be33d24a76be3b6c21e956c)
>>> host-fakeroot 1.25.3 Extracting
gzip -d -c /root/buildroot.dl/fakeroot/fakeroot_1.25.3.orig.tar.gz | tar --strip-components=1 -C /root/buildroot/output/build/host-fakeroot-1.25.3   -xf -
>>> host-fakeroot 1.25.3 Patching

Applying 0001-skip-doc-subdirs.patch using patch:
patching file doc/Makefile.am

Applying 0002-libfakeroot.c-define-_STAT_VER-if-not-already-define.patch using patch:
patching file libfakeroot.c

Applying 0003-libfakeroot.c-add-wrappers-for-new-glibc-2.33-symbol.patch using patch:
patching file libfakeroot.c

Applying 0004-configure.ac-fix-__xmknod-at-pointer-argument.patch using patch:
patching file configure.ac

Applying 0005-fix-build-regression-on-macOS.patch using patch:
patching file configure.ac
patching file libfakeroot.c

Applying 0002.stat_ver.patch using patch:
patching file libfakeroot.c
Reversed (or previously applied) patch detected!  Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file libfakeroot.c.rej
patching file libfakeroot.c
Hunk #1 succeeded at 1402 with fuzz 1 (offset 50 lines).
patching file libfakeroot.c
Hunk #1 succeeded at 2575 (offset 50 lines).
patching file configure.ac
Reversed (or previously applied) patch detected!  Skipping patch.
2 out of 2 hunks ignored -- saving rejects to file configure.ac.rej
patching file libfakeroot.c
Hunk #1 succeeded at 2116 (offset 50 lines).
Hunk #2 succeeded at 2135 (offset 50 lines).
patching file configure.ac
patching file libfakeroot.c
Hunk #4 succeeded at 2035 (offset 50 lines).
Hunk #5 succeeded at 2636 (offset 50 lines).
patching file wrapawk_macosx
patching file wrapfunc.inp
make: *** [package/pkg-generic.mk:227: /root/buildroot/output/build/host-fakeroot-1.25.3/.stamp_patched] Error 1

extern uint8_t swd_write_word(uint32_t addr, uint32_t val);
static uint32_t RESET_TARGET(void)
{
	swd_write_word((uint32_t)&SCB->AIRCR, ((0x5FA << SCB_AIRCR_VECTKEY_Pos) | SCB_AIRCR_SYSRESETREQ_Msk));
	
    return 1;	// change to '1' when a device reset sequence is implemented
}

extern uint8_t swd_write_word(uint32_t addr, uint32_t val);
static __inline void PIN_nRESET_OUT(uint32_t bit)
{
	if(bit == 0)
	{
		swd_write_word((uint32_t)&SCB->AIRCR, ((0x5FA << SCB_AIRCR_VECTKEY_Pos) | SCB_AIRCR_SYSRESETREQ_Msk));
	}
}

git clone https://github.com/armbian/build armbian
docker run --name c_armbian -v /root/armbian:/armbian -it ubuntu:21.04 bash
apt install git
cd /armbian
./compile.sh BOARD=rockpi-s BRANCH=current RELEASE=buster KERNEL_ONLY=no KERNEL_CONFIGURE=no BUILD_MINIMAL=no BUILD_DESKTOP=no

[ o.k. ] Installing base system [ Stage 2/2 ]
chroot: failed to run command '/bin/bash': Exec format error
[ error ] ERROR in function create_rootfs_cache [ debootstrap.sh:212 ]
[ error ] Debootstrap base system for current rockpi-s buster   no second stage failed
[ o.k. ] Process terminated
[ o.k. ] Unmounting [ /armbian/.tmp/rootfs-f321cf67-d4eb-4870-ad36-1313933e4c67/ ]
[ error ] ERROR in function unmount_on_exit [ image-helpers.sh:82 ]
[ error ] debootstrap-ng was interrupted
[ o.k. ] Process terminated

function ser {
    if   [ $# -eq 0 ]; then
        return
    elif [ $# -eq 1 ]; then
        port=/dev/ttyS$1
        baudrate=115200
    elif [ $# -eq 2 ]; then
        port=/dev/ttyS$1
        baudrate=$2
    fi

    echo "port: $port, baudrate: $baudrate"

    sudo chmod 666 $port
    sudo stty -F $port $baudrate
    sudo picocom -b $baudrate $port
}