TrainCamp-Jiangyunsong-PLSR/cmsis/uCOS-BSP/bsp.c

#include "includes.h"

 #define  BSP_REG_DEM_CR                        (*(CPU_REG32 *)0xE000EDFC) //DEMCR寄存器
#define  BSP_REG_DWT_CR                         (*(CPU_REG32 *)0xE0001000)    //DWT控制寄存器
#define  BSP_REG_DWT_CYCCNT                       (*(CPU_REG32 *)0xE0001004) //DWT时钟计数寄存器 
#define  BSP_REG_DBGMCU_CR                        (*(CPU_REG32 *)0xE0042004)
 //DEMCR寄存器的第24位,如果要使用DWT ETM ITM和TPIU的话DEMCR寄存器的第24位置1
 #define  BSP_BIT_DEM_CR_TRCENA                    DEF_BIT_24   
//DWTCR寄存器的第0位,当为1的时候使能CYCCNT计数器,使用CYCCNT之前应当先初始化
#define  BSP_BIT_DWT_CR_CYCCNTENA                 DEF_BIT_00
 /*
 *********************************************************************************************************
 *                                            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)
 {
    return HAL_RCC_GetHCLKFreq();//返回HCLK时钟频率
}
 /*
 *********************************************************************************************************
 *                                            BSP_Tick_Init()
 * Description : BSP_Tick_Init.
 * Argument(s) : none.
 * Return(s)   : none.
 * Note(s)     : none.
 *********************************************************************************************************
 */
 void BSP_Tick_Init(void)
 {
 CPU_INT32U cpu_clk_freq;
 CPU_INT32U cnts;
 cpu_clk_freq = BSP_CPU_ClkFreq();
 
 #if(OS_VERSION>=3000u)
  cnts = cpu_clk_freq/(CPU_INT32U)OSCfg_TickRate_Hz;
 #else
  cnts = cpu_clk_freq/(CPU_INT32U)OS_TICKS_PER_SEC;
 #endif
 OS_CPU_SysTickInit(cnts);
 }
 void BSP_Init(void)
 {
 BSP_Tick_Init();//此函数会初始化OS系统时钟，如果移植了正点原子的delay文件，则与主函数中的delay_init(168)只需要调用一个即可
}
 #if (CPU_CFG_TS_TMR_EN == DEF_ENABLED)
 void  CPU_TS_TmrInit (void)
 {
    CPU_INT32U  cpu_clk_freq_hz;
    BSP_REG_DEM_CR     |= (CPU_INT32U)BSP_BIT_DEM_CR_TRCENA;  //使用DWT  /* Enable Cortex-M4's DWT CYCCNT reg.*/
    BSP_REG_DWT_CYCCNT  = (CPU_INT32U)0u;       //初始化CYCCNT寄存器
    BSP_REG_DWT_CR     |= (CPU_INT32U)BSP_BIT_DWT_CR_CYCCNTENA; //开启CYCCNT
    cpu_clk_freq_hz = BSP_CPU_ClkFreq();
    CPU_TS_TmrFreqSet(cpu_clk_freq_hz);
 }
 #endif
 #if (CPU_CFG_TS_TMR_EN == DEF_ENABLED)
 CPU_TS_TMR  CPU_TS_TmrRd (void)
 {
    return ((CPU_TS_TMR)BSP_REG_DWT_CYCCNT);
 }
 #endif
 #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