本文章基于兆易创新GD32 MCU所提供的2.2.4版本库函数开发
后续项目主要在下面该专栏中发布：
手把手教你嵌入式国产化_不及你的温柔的博客-CSDN博客
感兴趣的点个关注收藏一下吧!
电机驱动开发可以跳转：
手把手教你嵌入式国产化-实战项目-无刷电机驱动（1）-CSDN博客
BMS电源系统开发可以跳转：暂未放链接
向上代码兼容GD32F303RCT6中使用
参考资料：
《UCOS-III开发指南_V1.5》
《µC/OS-III Documentation》
《ARM Cortex-M3 与 Cortex-M4 权威指南（第 3 版）》
介绍
从本小结开始，将会对UCOSIII移植进行讲解，前段时间移植好以后一直拖着没有写教程，今天来从0到1造一个能在GD32上面跑的rtos吧！
这是本次移植所使用到的UCOSIII源文件
链接：https://pan.baidu.com/s/1f2SNJlfymyU1EAM3Q52rDQ?pwd=5wxh
提取码：5wxh
--来自百度网盘超级会员V3的分享
本次实验首选的是UCOSIII作为所制作国产教学板的操作系统，后面在本期完成以后，会紧跟着出freertos的教程，这个坑又臭又长，让我们慢慢来，GD32F4系列做完了还没出教程呢。
那么本次实验就此开始，UCOSIII的介绍和优势，包括和同类产品的对比，这里就不再重新叙述了，想赶一下进度，后面如果有需要会回来补写的！
本项目配套开发板：
基于GD32F103RCT6国产GD32平台，以下教程编写基于该开发板
图片：
原理图以及例程请联系客服获取！
注意：
本教程致力于解决所有在调试中出现的所有问题，如有未包含在的问题，请联系QQ：2049363803，有奖更新文档！
新建工程
首先让我们新建个本地文件夹用来存放我们本次实验使用的各个文件和工程所在地
DOC文件夹：主要是存放本工程的说明文件，做一个简短的说明介绍；
Libraries文件夹：存放GD32工程中使用到的头文件以及源文件、启动文件、系统文件等；
Listing文件夹：放置UCOSIII的特定函数
Output文件夹：放置输出HEX下载文件
Progect文件夹：放置KEIL工程文件
USER文件夹：包含UCOSIII主体文件；
UCOSIII文件夹
uCOS-III 中放置Source以及Ports文件，分别用于存储UCOSIII源码以及接口文件，其中接口文件是RTOS和CPU连接的文件也就是移植文件，在本工程中必不可少。
uC-CPU 中放置与UCOSIII中CPU使用的通用代码
uC-LIB 中放置C语言使用到的函数库
其余的文件就是我们常用的用户程序文件；
文件移植：
本次我们实验从GD32新建工程的文件中进行更改
详细文章可以跳转之前的教程查看
GD32F103RCT6/GD32F303RCT6（2）固件库移植
这是原本的工程目录，我们将System和HARDWARE删除（之前是空）
然后补齐
并且在USER中建立
用来存放UCOSIII使用的文件
打开我们刚刚下载的UCOSIII的源码
EvalBoards 文件夹里面包含评估板相关文件
打开以下路径：
将下列这些文件导入到刚刚我们在User下新建的APP文件夹中
将下列这些文件导入到刚刚我们在User下新建的BSP文件夹中
找到该路径：
将以下三个文件夹拷贝到User下，并且覆盖掉我们之前建立的文件夹
KEIL移植：
在之前，我们所进行的操作，仅仅只是对该工程的文件夹进行移植和分类，从接下来开始，我们将会在keil5中，对该工程进行移植。
首先在该工程中新建分组：
在APP分组中添加我们刚刚建立的APP的文件夹的所有文件：
在BSP分组中添加我们刚刚建立的BSP的文件夹的所有文件：
在uC-CPU分组中添加我们刚刚建立的uC-CPU的文件夹的所有文件以及该文件夹内部文件中欧的RealView文件夹下的所有文件：
在uC-LIB分组中添加我们刚刚建立的uC-LIB的文件夹的所有文件以及该文件夹内部文件中欧的RealView文件夹下的所有文件：
在uCOSIII-Source分组中添加我们刚刚建立的uCOSIII-Source的文件夹的所有文件：
在uCOSIII-Port分组中添加我们刚刚建立的uCOSIII-Port的文件夹的内部目录中的RealView所有文件：
在完成上述步骤后，我们就已经完成在keil环境下的文件分组载入，接下来让我们在头文件中包含他们：
代码移植：
至此，UCOS 的整体工程基本移植完毕，我们需要修改 UCOS 配置文件，按照我们的
需求来进行修改。
在添加完头文件后，我们编译整个工程后发现，肯定是有一大堆错误的，那是因为我们的移植并未完成，所以接下来我们需要对UCOSIII的工程文件进行对应的修改以满足我们的需求
在PendSV_Handler以及SysTick_Handler中断函数所在地引入OS中的头文件：
void OS_CPU_SysTickHandler (void);
void OS_CPU_PendSVHandler (void);然后分别用GD32中的调用即可：
函数原型在
并且修改BSP.c和BSP.h文件：
bsp.c
/*
*********************************************************************************************************
* MICIRUM BOARD SUPPORT PACKAGE
*
* (c) Copyright 2013; Micrium, Inc.; Weston, FL
*
* All rights reserved. Protected by international copyright laws.
* Knowledge of the source code may NOT be used to develop a similar product.
* Please help us continue to provide the Embedded community with the finest
* software available. Your honesty is greatly appreciated.
*********************************************************************************************************
*/
/*
*********************************************************************************************************
*
* BOARD SUPPORT PACKAGE (BSP)
*
* IAR Development Kits
* on the
*
* STM32F429II-SK KICKSTART KIT
*
* Filename : bsp.c
* Version : V1.00
* Programmer(s) : FF
* YS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* INCLUDE FILES
*********************************************************************************************************
*/
#define BSP_MODULE
#include <bsp.h>
#include <os.h>
CPU_INT32U BSP_CPU_ClkFreq_MHz;
/*
*********************************************************************************************************
* LOCAL DEFINES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL CONSTANTS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL DATA TYPES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL TABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL GLOBAL VARIABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* REGISTERS
*********************************************************************************************************
*/
#define BSP_REG_DEM_CR (*(CPU_REG32 *)0xE000EDFC)
#define BSP_REG_DWT_CR (*(CPU_REG32 *)0xE0001000)
#define BSP_REG_DWT_CYCCNT (*(CPU_REG32 *)0xE0001004)
#define BSP_REG_DBGMCU_CR (*(CPU_REG32 *)0xE0042004)
/* - RCC REGISTER DEFINES - */
#define BSP_REG_RCC_BASE_ADDR ((CPU_INT32U)(0x40023800))
#define BSP_REG32_RCC_CR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x00u ))
#define BSP_REG32_RCC_PLLCFGR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x04u ))
#define BSP_REG32_RCC_CFGR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x08u ))
#define BSP_REG32_RCC_CIR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x0Cu ))
#define BSP_REG32_RCC_AHB1RSTR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x10u ))
#define BSP_REG32_RCC_AHB2RSTR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x14u ))
#define BSP_REG32_RCC_AHB3RSTR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x18u ))
#define BSP_REG32_RCC_APB1RSTR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x20u ))
#define BSP_REG32_RCC_APB2RSTR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x24u ))
#define BSP_REG32_RCC_AHB1ENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x30u ))
#define BSP_REG32_RCC_AHB2ENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x34u ))
#define BSP_REG32_RCC_AHB3ENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x38u ))
#define BSP_REG32_RCC_APB1ENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x40u ))
#define BSP_REG32_RCC_APB2ENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x44u ))
#define BSP_REG32_RCC_AHB1LPENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x50u ))
#define BSP_REG32_RCC_AHB2LPENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x54u ))
#define BSP_REG32_RCC_AHB3LPENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x58u ))
#define BSP_REG32_RCC_APB1LPENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x60u ))
#define BSP_REG32_RCC_APB2LPENR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x64u ))
#define BSP_REG32_RCC_BDCR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x70u ))
#define BSP_REG32_RCC_CSR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x74u ))
#define BSP_REG32_RCC_SSCGR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x80u ))
#define BSP_REG32_RCC_PLLI2SCFGR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x84u ))
#define BSP_REG32_RCC_PLLSAICFGR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x88u ))
#define BSP_REG32_RCC_DCKCFGR (*(CPU_REG32 *)( BSP_REG_RCC_BASE_ADDR + 0x8Cu ))
/* - FLASH REGISTER DEFINES - */
#define BSP_REG_FLASH_BASE_ADDR (( CPU_INT32U )(0x40023C00))
#define BSP_REG32_FLASH_ACR (*(CPU_REG32 *)( BSP_REG_FLASH_BASE_ADDR + 0x00u ))
#define BSP_REG32_FLASH_KEYR (*(CPU_REG32 *)( BSP_REG_FLASH_BASE_ADDR + 0x04u ))
#define BSP_REG32_FLASH_OPTKEYR (*(CPU_REG32 *)( BSP_REG_FLASH_BASE_ADDR + 0x08u ))
#define BSP_REG32_FLASH_SR (*(CPU_REG32 *)( BSP_REG_FLASH_BASE_ADDR + 0x0Cu ))
#define BSP_REG32_FLASH_CR (*(CPU_REG32 *)( BSP_REG_FLASH_BASE_ADDR + 0x10u ))
#define BSP_REG32_FLASH_OPTCR (*(CPU_REG32 *)( BSP_REG_FLASH_BASE_ADDR + 0x14u ))
#define BSP_REG32_FLASH_OPTCR1 (*(CPU_REG32 *)( BSP_REG_FLASH_BASE_ADDR + 0x18u ))
/*
*********************************************************************************************************
* REGISTER BITS
*********************************************************************************************************
*/
#define BSP_DBGMCU_CR_TRACE_IOEN_MASK 0x10u
#define BSP_DBGMCU_CR_TRACE_MODE_ASYNC 0x00u
#define BSP_DBGMCU_CR_TRACE_MODE_SYNC_01 0x40u
#define BSP_DBGMCU_CR_TRACE_MODE_SYNC_02 0x80u
#define BSP_DBGMCU_CR_TRACE_MODE_SYNC_04 0xC0u
#define BSP_DBGMCU_CR_TRACE_MODE_MASK 0xC0u
#define BSP_BIT_DEM_CR_TRCENA DEF_BIT_24
#define BSP_BIT_DWT_CR_CYCCNTENA DEF_BIT_00
/* - RCC BLOCK - */
#define HSE_TIMEOUT_VAL 0x0500u
#define BSP_MSK_HSECFG 0x00FF0000u
#define BSP_BIT_RCC_CR_HSION DEF_BIT_00
#define BSP_BIT_RCC_CR_HSEBYP DEF_BIT_18
#define BSP_BIT_RCC_CR_HSEON DEF_BIT_16
#define BSP_BIT_RCC_CR_HSERDY DEF_BIT_17
#define BSP_MSK_RCC_CFGR_HPRE 0x000000F0u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV1 0x00000000u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV2 0x00000080u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV4 0x00000090u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV8 0x000000A0u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV16 0x000000B0u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV64 0x000000C0u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV128 0x000000D0u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV256 0x000000E0u
#define BSP_MSK_RCC_CFGR_SYSCLKDIV512 0x000000F0u
#define BSP_MSK_RCC_CFGR_PPRE1 0x00001C00u
#define BSP_MSK_RCC_CFGR_PPRE2 0x0000E000u
#define BSP_MSK_RCC_CFGR_HCLK_DIV1 0x00000000u
#define BSP_MSK_RCC_CFGR_HCLK_DIV2 0x00001000u
#define BSP_MSK_RCC_CFGR_HCLK_DIV4 0x00001400u
#define BSP_MSK_RCC_CFGR_HCLK_DIV8 0x00001800u
#define BSP_MSK_RCC_CFGR_HCLK_DIV16 0x00001C00u
#define BSP_MSK_RCC_CFGR_SWS_HSI 0x00000000u
#define BSP_MSK_RCC_CFGR_SWS_HSE 0x00000004u
#define BSP_MSK_RCC_CFGR_SWS_PLL 0x00000008u
#define BSP_MSK_RCC_CFGR_SWS 0x0000000Cu
#define BSP_MSK_RCC_CFGR_SW_HSI 0x00000000u
#define BSP_MSK_RCC_CFGR_SW_HSE 0x00000001u
#define BSP_MSK_RCC_CFGR_SW_PLL 0x00000002u
#define BSP_MSK_RCC_CFGR_SW 0x00000003u
/* - PLL BLOCK - */
#define BSP_BIT_RCC_PLLCFGR_PLLM 8u
#define BSP_BIT_RCC_PLLCFGR_PLLN 336u
#define BSP_BIT_RCC_PLLCFGR_PLLP 2u
#define BSP_BIT_RCC_PLLCFGR_PLLQ 7u
#define BSP_BIT_RCC_CR_PLLON DEF_BIT_24
#define BSP_BIT_RCC_CR_PLLRDY DEF_BIT_25
#define BSP_MSK_RCC_PLLCFGR_PLLSRC_HSE 0x00400000u
#define BSP_MSK_RCC_PLLCFGR_RST 0x24003010u
#define BSP_MSK_SYSCLK_SRC_PLLCLK 0x00000002u
#define BSP_MSK_PLLCFGR_PLLSRC_HSE 0x00400000u
#define BSP_MSK_PLLCFGR_PLLSRC_HSI 0x00000000u
/* - FLASH BLOCK - */
#define BSP_BIT_FLASH_ACR_PRFTEN DEF_BIT_08
#define BSP_BIT_FLASH_ACR_ICEN DEF_BIT_09
#define BSP_BIT_FLASH_ACR_DCEN DEF_BIT_10
#define BSP_MSK_FLASHLATENCY_0WS 0x00000000u
#define BSP_MSK_FLASHLATENCY_1WS 0x00000001u
#define BSP_MSK_FLASHLATENCY_2WS 0x00000002u
#define BSP_MSK_FLASHLATENCY_3WS 0x00000003u
#define BSP_MSK_FLASHLATENCY_4WS 0x00000004u
#define BSP_MSK_FLASHLATENCY_5WS 0x00000005u
#define BSP_MSK_FLASHLATENCY_6WS 0x00000006u
#define BSP_MSK_FLASHLATENCY_7WS 0x00000007u
#define BSP_MSK_FLASHLATENCY_8WS 0x00000008u
#define BSP_MSK_FLASHLATENCY_9WS 0x00000009u
#define BSP_MSK_FLASHLATENCY_10WS 0x0000000Au
#define BSP_MSK_FLASHLATENCY_11WS 0x0000000Bu
#define BSP_MSK_FLASHLATENCY_12WS 0x0000000Cu
#define BSP_MSK_FLASHLATENCY_13WS 0x0000000Du
#define BSP_MSK_FLASHLATENCY_14WS 0x0000000Eu
#define BSP_MSK_FLASHLATENCY_15WS 0x0000000Fu
/*
*********************************************************************************************************
* LOCAL FUNCTION PROTOTYPES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* BSP_Init()
*
* Description : Initialize the Board Support Package (BSP).
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : Application.
*
* Note(s) : (1) This function SHOULD be called before any other BSP function is called.
*
* (2) CPU instruction / data tracing requires the use of the following pins :
* (a) (1) Asynchronous : PB[3]
* (2) Synchronous 1-bit : PE[3:2]
* (3) Synchronous 2-bit : PE[4:2]
* (4) Synchronous 4-bit : PE[6:2]
*
* (c) The application may wish to adjust the trace bus width depending on I/O
* requirements.
*********************************************************************************************************
*/
void BSP_Init (void)
{
}
/*
*********************************************************************************************************
* BSP_CPU_ClkFreq()
*
* Description : Read CPU registers to determine the CPU clock frequency of the chip.
*
* Argument(s) : none.
*
* Return(s) : The CPU clock frequency, in Hz.
*
* Caller(s) : Application.
*
* Note(s) : none.
*********************************************************************************************************
*/
//CPU_INT32U BSP_CPU_ClkFreq (void)
//{
// RCC_ClocksTypeDef rcc_clocks;
// RCC_GetClocksFreq(&rcc_clocks);
// return ((CPU_INT32U)rcc_clocks.HCLK_Frequency);
//}
CPU_INT32U BSP_CPU_ClkFreq(void)
{
return (CPU_INT32U)rcu_clock_freq_get(CK_SYS); // 获取系统时钟频率
}
/*
*********************************************************************************************************
* BSP_Tick_Init()
*
* Description : Configure and Initialize the OS Tick Services (SysTick).
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : Application.
*
* Note(s) : none.
*********************************************************************************************************
*/
void BSP_Tick_Init (void)
{
CPU_INT32U cpu_clk_freq;
CPU_INT32U cnts;
cpu_clk_freq = BSP_CPU_ClkFreq(); /* Determine SysTick reference freq. */
#if (OS_VERSION >= 30000u)
cnts = (cpu_clk_freq / (CPU_INT32U)OSCfg_TickRate_Hz); /* Determine nbr SysTick increments */
#else
cnts = (cpu_clk_freq / (CPU_INT32U)OS_TICKS_PER_SEC); /* Determine nbr SysTick increments. */
#endif
OS_CPU_SysTickInit(cnts); /* Init uC/OS periodic time src (SysTick). */
}
/*$PAGE*/
/*
*********************************************************************************************************
* CPU_TS_TmrInit()
*
* Description : Initialize & start CPU timestamp timer.
*
* Argument(s) : none.
*
* Return(s) : none.
*
* Caller(s) : CPU_TS_Init().
*
* This function is an INTERNAL CPU module function & MUST be implemented by application/
* BSP function(s) [see Note #1] but MUST NOT be called by application function(s).
*
* Note(s) : (1) CPU_TS_TmrInit() is an application/BSP function that MUST be defined by the developer
* if either of the following CPU features is enabled :
*
* (a) CPU timestamps
* (b) CPU interrupts disabled time measurements
*
* See 'cpu_cfg.h CPU TIMESTAMP CONFIGURATION Note #1'
* & 'cpu_cfg.h CPU INTERRUPTS DISABLED TIME MEASUREMENT CONFIGURATION Note #1a'.
*
* (2) (a) Timer count values MUST be returned via word-size-configurable 'CPU_TS_TMR'
* data type.
*
* (1) If timer has more bits, truncate timer values' higher-order bits greater
* than the configured 'CPU_TS_TMR' timestamp timer data type word size.
*
* (2) Since the timer MUST NOT have less bits than the configured 'CPU_TS_TMR'
* timestamp timer data type word size; 'CPU_CFG_TS_TMR_SIZE' MUST be
* configured so that ALL bits in 'CPU_TS_TMR' data type are significant.
*
* In other words, if timer size is not a binary-multiple of 8-bit octets
* (e.g. 20-bits or even 24-bits), then the next lower, binary-multiple
* octet word size SHOULD be configured (e.g. to 16-bits). However, the
* minimum supported word size for CPU timestamp timers is 8-bits.
*
* See also 'cpu_cfg.h CPU TIMESTAMP CONFIGURATION Note #2'
* & 'cpu_core.h CPU TIMESTAMP DATA TYPES Note #1'.
*
* (b) Timer SHOULD be an 'up' counter whose values increase with each time count.
*
* (c) When applicable, timer period SHOULD be less than the typical measured time
* but MUST be less than the maximum measured time; otherwise, timer resolution
* inadequate to measure desired times.
*
* See also 'CPU_TS_TmrRd() Note #2'.
*********************************************************************************************************
*/
#if (CPU_CFG_TS_TMR_EN == DEF_ENABLED)
void CPU_TS_TmrInit (void)
{
CPU_INT32U fclk_freq;
fclk_freq = BSP_CPU_ClkFreq();
BSP_REG_DEM_CR |= (CPU_INT32U)BSP_BIT_DEM_CR_TRCENA; /* Enable Cortex-M4's DWT CYCCNT reg. */
BSP_REG_DWT_CYCCNT = (CPU_INT32U)0u;
BSP_REG_DWT_CR |= (CPU_INT32U)BSP_BIT_DWT_CR_CYCCNTENA;
CPU_TS_TmrFreqSet((CPU_TS_TMR_FREQ)fclk_freq);
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* CPU_TS_TmrRd()
*
* Description : Get current CPU timestamp timer count value.
*
* Argument(s) : none.
*
* Return(s) : Timestamp timer count (see Notes #2a & #2b).
*
* Caller(s) : CPU_TS_Init(),
* CPU_TS_Get32(),
* CPU_TS_Get64(),
* CPU_IntDisMeasStart(),
* CPU_IntDisMeasStop().
*
* This function is an INTERNAL CPU module function & MUST be implemented by application/
* BSP function(s) [see Note #1] but SHOULD NOT be called by application function(s).
*
* Note(s) : (1) CPU_TS_TmrRd() is an application/BSP function that MUST be defined by the developer
* if either of the following CPU features is enabled :
*
* (a) CPU timestamps
* (b) CPU interrupts disabled time measurements
*
* See 'cpu_cfg.h CPU TIMESTAMP CONFIGURATION Note #1'
* & 'cpu_cfg.h CPU INTERRUPTS DISABLED TIME MEASUREMENT CONFIGURATION Note #1a'.
*
* (2) (a) Timer count values MUST be returned via word-size-configurable 'CPU_TS_TMR'
* data type.
*
* (1) If timer has more bits, truncate timer values' higher-order bits greater
* than the configured 'CPU_TS_TMR' timestamp timer data type word size.
*
* (2) Since the timer MUST NOT have less bits than the configured 'CPU_TS_TMR'
* timestamp timer data type word size; 'CPU_CFG_TS_TMR_SIZE' MUST be
* configured so that ALL bits in 'CPU_TS_TMR' data type are significant.
*
* In other words, if timer size is not a binary-multiple of 8-bit octets
* (e.g. 20-bits or even 24-bits), then the next lower, binary-multiple
* octet word size SHOULD be configured (e.g. to 16-bits). However, the
* minimum supported word size for CPU timestamp timers is 8-bits.
*
* See also 'cpu_cfg.h CPU TIMESTAMP CONFIGURATION Note #2'
* & 'cpu_core.h CPU TIMESTAMP DATA TYPES Note #1'.
*
* (b) Timer SHOULD be an 'up' counter whose values increase with each time count.
*
* (1) If timer is a 'down' counter whose values decrease with each time count,
* then the returned timer value MUST be ones-complemented.
*
* (c) (1) When applicable, the amount of time measured by CPU timestamps is
* calculated by either of the following equations :
*
* (A) Time measured = Number timer counts * Timer period
*
* where
*
* Number timer counts Number of timer counts measured
* Timer period Timer's period in some units of
* (fractional) seconds
* Time measured Amount of time measured, in same
* units of (fractional) seconds
* as the Timer period
*
* Number timer counts
* (B) Time measured = ---------------------
* Timer frequency
*
* where
*
* Number timer counts Number of timer counts measured
* Timer frequency Timer's frequency in some units
* of counts per second
* Time measured Amount of time measured, in seconds
*
* (2) Timer period SHOULD be less than the typical measured time but MUST be less
* than the maximum measured time; otherwise, timer resolution inadequate to
* measure desired times.
*********************************************************************************************************
*/
#if (CPU_CFG_TS_TMR_EN == DEF_ENABLED)
CPU_TS_TMR CPU_TS_TmrRd (void)
{
CPU_TS_TMR ts_tmr_cnts;
ts_tmr_cnts = (CPU_TS_TMR)BSP_REG_DWT_CYCCNT;
return (ts_tmr_cnts);
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* CPU_TSxx_to_uSec()
*
* Description : Convert a 32-/64-bit CPU timestamp from timer counts to microseconds.
*
* Argument(s) : ts_cnts CPU timestamp (in timestamp timer counts [see Note #2aA]).
*
* Return(s) : Converted CPU timestamp (in microseconds [see Note #2aD]).
*
* Caller(s) : Application.
*
* This function is an (optional) CPU module application programming interface (API)
* function which MAY be implemented by application/BSP function(s) [see Note #1] &
* MAY be called by application function(s).
*
* Note(s) : (1) CPU_TS32_to_uSec()/CPU_TS64_to_uSec() are application/BSP functions that MAY be
* optionally defined by the developer when either of the following CPU features is
* enabled :
*
* (a) CPU timestamps
* (b) CPU interrupts disabled time measurements
*
* See 'cpu_cfg.h CPU TIMESTAMP CONFIGURATION Note #1'
* & 'cpu_cfg.h CPU INTERRUPTS DISABLED TIME MEASUREMENT CONFIGURATION Note #1a'.
*
* (2) (a) The amount of time measured by CPU timestamps is calculated by either of
* the following equations :
*
* 10^6 microseconds
* (1) Time measured = Number timer counts * ------------------- * Timer period
* 1 second
*
* Number timer counts 10^6 microseconds
* (2) Time measured = --------------------- * -------------------
* Timer frequency 1 second
*
* where
*
* (A) Number timer counts Number of timer counts measured
* (B) Timer frequency Timer's frequency in some units
* of counts per second
* (C) Timer period Timer's period in some units of
* (fractional) seconds
* (D) Time measured Amount of time measured,
* in microseconds
*
* (b) Timer period SHOULD be less than the typical measured time but MUST be less
* than the maximum measured time; otherwise, timer resolution inadequate to
* measure desired times.
*
* (c) Specific implementations may convert any number of CPU_TS32 or CPU_TS64 bits
* -- up to 32 or 64, respectively -- into microseconds.
*********************************************************************************************************
*/
#if (CPU_CFG_TS_32_EN == DEF_ENABLED)
CPU_INT64U CPU_TS32_to_uSec (CPU_TS32 ts_cnts)
{
CPU_INT64U ts_us;
CPU_INT64U fclk_freq;
fclk_freq = BSP_CPU_ClkFreq();
ts_us = ts_cnts / (fclk_freq / DEF_TIME_NBR_uS_PER_SEC);
return (ts_us);
}
#endif
#if (CPU_CFG_TS_64_EN == DEF_ENABLED)
CPU_INT64U CPU_TS64_to_uSec (CPU_TS64 ts_cnts)
{
CPU_INT64U ts_us;
CPU_INT64U fclk_freq;
fclk_freq = BSP_CPU_ClkFreq();
ts_us = ts_cnts / (fclk_freq / DEF_TIME_NBR_uS_PER_SEC);
return (ts_us);
}
#endif
GD32时钟获取：
根据提供的库函数列表，实际上GD32F10x的库提供了一个直接获取系统时钟频率的函数，即：
1uint32_t rcu_clock_freq_get(rcu_clock_freq_enum clock);这个函数可以根据传入的枚举参数来获取特定时钟的频率，其中枚举类型为：
1/* rcu clock frequency */ 2typedef enum 3{ 4 CK_SYS = 0, /*!< system clock */ 5 CK_AHB, /*!< AHB clock */ 6 CK_APB1, /*!< APB1 clock */ 7 CK_APB2, /*!< APB2 clock */ 8}rcu_clock_freq_enum;因此，想要获取系统时钟频率的话，可以直接调用这个函数并传入
CK_SYS作为参数。代码如下：
1CPU_INT32U BSP_CPU_ClkFreq(void) 2{ 3 return (CPU_INT32U)rcu_clock_freq_get(CK_SYS); // 获取系统时钟频率 4}这样，就可以直接通过库提供的API获取到GD32F103RCT6的系统时钟频率了。
对照STM32的代码：
CPU_INT32U BSP_CPU_ClkFreq (void)
{
RCC_ClocksTypeDef rcc_clocks;
RCC_GetClocksFreq(&rcc_clocks);
return ((CPU_INT32U)rcc_clocks.HCLK_Frequency);
}bsp.h
/*
*********************************************************************************************************
* MICIRUM BOARD SUPPORT PACKAGE
*
* (c) Copyright 2014; Micrium, Inc.; Weston, FL
*
* All rights reserved. Protected by international copyright laws.
* Knowledge of the source code may NOT be used to develop a similar product.
* Please help us continue to provide the Embedded community with the finest
* software available. Your honesty is greatly appreciated.
*********************************************************************************************************
*/
/*
*********************************************************************************************************
*
* BOARD SUPPORT PACKAGE (BSP)
*
* IAR Development Kits
* on the
*
* STM32F429II-SK KICKSTART KIT
*
* Filename : bsp.h
* Version : V1.00
* Programmer(s) : FF
* DC
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* MODULE
*
* Note(s) : (1) This header file is protected from multiple pre-processor inclusion through use of the
* BSP present pre-processor macro definition.
*
* (2) This file and its dependencies requires IAR v6.20 or later to be compiled.
*
*********************************************************************************************************
*/
#ifndef BSP_PRESENT
#define BSP_PRESENT
/*
*********************************************************************************************************
* EXTERNS
*********************************************************************************************************
*/
#ifdef BSP_MODULE
#define BSP_EXT
#else
#define BSP_EXT extern
#endif
/*
*********************************************************************************************************
* INCLUDE FILES
*********************************************************************************************************
*/
#include <stdio.h>
#include <stdarg.h>
#include <cpu.h>
#include <cpu_core.h>
#include <lib_def.h>
#include <lib_ascii.h>
#include "gd32f10x.h" // Device header
#include "app_cfg.h" // Device header
#include "gd32f10x_rcu.h"
/*
*********************************************************************************************************
* CONSTANTS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* PERIPH DEFINES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* DATA TYPES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* GLOBAL VARIABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* MACRO'S
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* INT DEFINES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* PERIPH DEFINES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* FUNCTION PROTOTYPES
*********************************************************************************************************
*/
void BSP_Init (void);
CPU_INT32U BSP_CPU_ClkFreq (void);
void BSP_Tick_Init (void);
/*
*********************************************************************************************************
* INTERRUPT SERVICES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* PERIPHERAL POWER/CLOCK SERVICES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LED SERVICES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* MODULE END
*********************************************************************************************************
*/
#endif /* End of module include. */
然后将APP.C中的文件全部删除后，添加以下空代码：
APP.c
#include <includes.h>
/*
*************************************************************************
* 变量
*************************************************************************
*/
/*
*************************************************************************
* 函数声明
*************************************************************************
*/
/*
*************************************************************************
* main 函数
*************************************************************************
*/
/**
* @brief 主函数
* @param 无
* @retval 无
*/
int main(void)
{
/* 暂时没有在 main 里面创建任务应用任务 */
}
/********************************END OF FILE****************************/
终于到了最后一步了，接下来我们只需要将原本工程里面的main函数注释掉就完成了：
main函数是C/C++程序的入口点，一个程序中只能有一个有效的main函数定义。
OK，移植好了以后，让我们编译一下：
这样我们就完成了一个UCOSIII的移植了，接下来就可以开始后续的编写和操作！
下载验证：
将程序编译好，用STLINK 仿真器把程序下载到GD32开发板，发现怎么啥现象也没有？别急，目前我们还没有在main中创建任务，系统也没有跑起来，当然没有现象，如果想看现象，得在main中创建任务函数，并且正确让UCOS运行，至于如何去做，请看下一小结！
