查看HC32的源代码

== Toolchain ==

=== Compier ===

* toolchain/gcc-arm-none-eabi/bin/
** arm-none-eabi-gcc
** arm-none-eabi-g++
** arm-none-eabi-gdb


* toolchain/gcc-arm-none-eabi/arm-none-eabi/lib/thumb/v6-m/
** libc.a
** libstdc++.a
** libm.a

<br>

=== Debug ===

查看生成的变量地址：

<source lang=bash>
$ ../../../toolchain/gcc-arm-none-eabi/bin/arm-none-eabi-nm -n build/main.elf  | grep k
00000108 T _Z15key_irq_handlerv
00000190 T SystemCoreClockUpdate
000001a0 T systick_init
00000368 W _sbrk
000003a0 T _kill
000003d0 T _lseek
000003f0 T _link
00000958 T Sysctrl_GetHClkFreq
00000a78 T Sysctrl_GetPClkFreq
00000b2c T SysTick_Handler
0000144c T _sbrk_r
00001470 T __malloc_lock
00001472 T __malloc_unlock
00001498 t .udivsi3_skip_div0_test
000015ac t .divsi3_skip_div0_test
20000000 D SystemCoreClock
20000004 d _tx_ok
20000094 B k
200001a8 b secTicks
200001b0 B __malloc_sbrk_start
200001b4 B msTicks_cnt
200001b8 B msTicks
200005c0 ? stack
20001c00 A __StackLimit
20002000 A __stack
20002000 B __StackTop
</source>

查看 .data .bss 段大小：
<source lang=bash>
$ ../../../toolchain/gcc-arm-none-eabi/bin/arm-none-eabi-size.exe build/main.elf
   text    data     bss     dec     hex filename
   9740     124     324   10188    27cc build/main.elf

set the global var 'int k = 0':
$ ../../../toolchain/gcc-arm-none-eabi/bin/arm-none-eabi-size.exe build/main.elf
   text    data     bss     dec     hex filename
   9760     120     328   10208    27e0 build/main.elf
</source>

* .data：初始值存储在 Flash 中，启动时复制到 RAM
* .bss：只需要记录大小信息，不需要在 Flash 中存储 0 值。（Block Started by Symbol）段存放：
** '''未初始化'''的'''全局变量'''
** '''未初始化'''的静态变量
** '''初始化为 0''' 的变量（包括静态变量）

<source lang=bash>
FLASH 存储器：
    +---------------+
    | .text (代码)  |
    +---------------+
    | .rodata (常量)|
    +---------------+
    | .data (初始值)|
    +---------------+
    | ...           |
    +---------------+

RAM 存储器：
    +---------------+
    | .data (副本)  | ← 从 Flash 复制过来
    +---------------+
    | .bss          | ← 启动时清零
    +---------------+
    | 堆 (heap)     |
    +---------------+
    | 栈 (stack)    |
    +---------------+
</source>


<br>

=== Uploader ===

==== J-Link ====

从 https://github.com/hdscmcu/pack 获取 HDSC.HC32L130.1.0.1.pack，这是个 zip 包，改名为 L130.zip 后 unzip 解压：

<source lang=bash>
$ find .
./Device/Include/HC32L130E8PA.h
./Device/Include/HC32L130F8UA.h
./Device/Include/HC32L130J8TA.h
./Device/Include/system_hc32l130.h
./Device/Source/ARM/startup_hc32l130.s
./Device/Source/main.c
./Device/Source/system_hc32l130.c
./Flash/FlashHC32L130_64K.FLM
./HDSC.HC32L130.pdsc    # XML 描述文件
./SVD/HC32L130E8PA.sfr
./SVD/HC32L130F8UA.sfr
./SVD/HC32L130J8TA.sfr
</source>

将 FlashHC32L130_64K.FLM 改名为 HC32L130_64K.FLM，放在：
<source lang=bash>  
$ find /c/Program\ Files\ \(x86\)/SEGGER/JLink/Devices/HDSC/
/c/Program Files (x86)/SEGGER/JLink/Devices/HDSC/HC32L130_64K.FLM
</source>


/c/Program\ Files\ \(x86\)/SEGGER/JLink/JLinkDevices.xml 增加：

<source lang=xml>
  <!-- Huada (HDSC) -->
  <Device>
    <ChipInfo Vendor="HDSC" Name="HC32L110x4"  WorkRAMAddr="0x20000000" WorkRAMSize="0x800" Core="JLINK_CORE_CORTEX_M0"/>
    <FlashBankInfo Name="Flash_16K" BaseAddr="0x0" MaxSize="0x4000" Loader="Devices/HDSC/HC32L110B4_C4.FLM" LoaderType="FLASH_ALGO_TYPE_OPEN" AlwaysPresent="1"/>
  </Device>
  <Device>
    <ChipInfo Vendor="HDSC" Name="HC32L110x6"  WorkRAMAddr="0x20000000" WorkRAMSize="0x1000" Core="JLINK_CORE_CORTEX_M0"/>
    <FlashBankInfo Name="Flash_32K" BaseAddr="0x0" MaxSize="0x8000" Loader="Devices/HDSC/HC32L110B6_C6.FLM" LoaderType="FLASH_ALGO_TYPE_OPEN" AlwaysPresent="1"/>
  </Device>
  <Device>
    <ChipInfo Vendor="HDSC" Name="HC32L130"  WorkRAMAddr="0x20000000" WorkRAMSize="0x2000" Core="JLINK_CORE_CORTEX_M0"/>
    <FlashBankInfo Name="Flash_64K" BaseAddr="0x0" MaxSize="0x10000" Loader="Devices/HDSC/HC32L130_64K.FLM" LoaderType="FLASH_ALGO_TYPE_OPEN" AlwaysPresent="1"/>
  </Device>
</source>

则可使用 J-Flash 烧写：

* MCU 选 HC32L130，SWD 4000KHz
* Target -> Connect
* Target -> Production Programming（快捷键 F7）
* Target -> Manual Programming -> Start Application（快捷键 F9）


JLink 命令行方式：

<source lang=bash>
$ cat  ../../toolchain/jlink-flash.cmd
erase
loadfile build/main.hex
r
exit

$ /c/SEGGER/JLink/JLink.exe -device HC32L130 -if swd -speed 4000 -CommanderScript ../../toolchain/jlink-flash.cmd
SEGGER J-Link Commander V6.72c (Compiled May  8 2020 17:22:54) DLL version V6.72c, compiled May  8 2020 17:21:59

J-Link Command File read successfully.
Processing script file...

J-Link connection not established yet but required for command.
Connecting to J-Link via USB...O.K.
Firmware: J-Link V9 compiled Dec 13 2019 11:14:50
Hardware version: V9.30
S/N: 36310083
License(s): RDI, GDB, FlashDL, FlashBP, JFlash
VTref=3.300V
Target connection not established yet but required for command.
Device "HC32L130" selected.

Connecting to target via SWD
Found SW-DP with ID 0x0BC11477
Unknown DP version. Assuming DPv0
Scanning AP map to find all available APs
AP[1]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x04770031)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410CC601. Implementer code: 0x41 (ARM)
Found Cortex-M0 r0p1, Little endian.
FPUnit: 4 code (BP) slots and 0 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB008 SCS
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 000BB00A DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 000BB00B FPB
Cortex-M0 identified.
Erasing device...
J-Link: Flash download: Total time needed: 0.189s (Prepare: 0.110s, Compare: 0.000s, Erase: 0.075s, Program: 0.000s, Verify: 0.000s, Restore: 0.003s)
Erasing done.

Downloading file [build/main.hex]...
J-Link: Flash download: Bank 0 @ 0x00000000: 1 range affected (10752 bytes)
J-Link: Flash download: Total time needed: 1.095s (Prepare: 0.017s, Compare: 0.134s, Erase: 0.299s, Program: 0.570s, Verify: 0.060s, Restore: 0.012s)
O.K.

Reset delay: 0 ms
Reset type NORMAL: Resets core & peripherals via SYSRESETREQ & VECTRESET bit.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.

Script processing completed.
</source>

或者：
<source lang=bash>
$ cat up.cmd
device HC32L130
si SWD
speed 4000
connect
erase
loadfile build/main.hex
r
exit

$ /c/SEGGER/JLink/JLink.exe -CommanderScript ./up.cmd
</source>

<br>

==== UART ====

* https://github.com/kicer/hc32flash

<br>

==== STLINK ====

* [http://www.51hei.com/bbs/dpj-194723-1.html pyOCD]

* https://www.cnblogs.com/milton/p/16586831.html
* https://github.com/IOsetting/hc32l110-template
* https://gitcode.com/open-source-toolkit/8cb1a

<br>

=== Linker Script ===

<source lang=python>
MEMORY
{
    FLASH ( rx )      : ORIGIN = 0x00000000, LENGTH = 64K
    RAM ( rxw )       : ORIGIN = 0x20000000, LENGTH = 8K
}
</source>

.vectors (Vector Table) 位于 Flash 开始处，Flash 上代码段 .text 之前：

<source lang=python>
ENTRY(Reset_Handler)

SECTIONS
{
  .text :
  {
    KEEP(*(.vectors))
    __Vectors_End = .;
    __Vectors_Size = __Vectors_End - __Vectors;
    __end__ = .;
......
......
</source>

arch/hc32/common/startup_hc32l13x.c:

<source lang=c>
/*----------------------------------------------------------------------------
  Exception / Interrupt Vector table
 *----------------------------------------------------------------------------*/
const pFunc __Vectors[] __attribute__ ((section(".vectors"))) = {
    /* Cortex-M Exception Handlers */
    (pFunc)&__StackTop,                       /*      Initial Stack Pointer     */
    Reset_Handler,                            /*      Reset Handler             */
......
......
</source>

<br>