ly830102624 发表于 2018-4-22 00:18
统一回复：下载不进去是硬件问题。现在外部时钟8M，LED灯都点不亮。难道时钟配置错误？有大神贴出时钟配置 ...

gcc的, 不过估计和其他编译器的也差不多少
需要在Makefile里指定-DSTM32F10X_MD_VL, 这样它会执行SetSysclkTo24()
跟f103的时钟树还是稍微有一点点不一样的, f103的hse在进PLL之前的预分频器只能/1或/2, 其他大部分stm32都可以从/1一直到/16

1. #include "stm32f10x.h"
   
2. 
   
3. #if defined (STM32F10X_LD_VL) || (defined STM32F10X_MD_VL) || (defined STM32F10X_HD_VL)
   
4. #define SYSCLK_FREQ_24MHz  24000000
   
5. #else
   
6. #define SYSCLK_FREQ_72MHz  72000000
   
7. #endif
   
8. 
   
9. #define VECT_TAB_OFFSET  0x0   
   
10. 
    
11. #ifdef SYSCLK_FREQ_HSE
    
12. uint32_t SystemCoreClock = SYSCLK_FREQ_HSE;
    
13. #elif defined SYSCLK_FREQ_24MHz
    
14. uint32_t SystemCoreClock = SYSCLK_FREQ_24MHz;
    
15. #elif defined SYSCLK_FREQ_72MHz
    
16. uint32_t SystemCoreClock = SYSCLK_FREQ_72MHz;
    
17. #else
    
18. uint32_t SystemCoreClock = HSI_VALUE;
    
19. #endif
    
20. 
    
21. static void SetSysClock(void);
    
22. 
    
23. #ifdef SYSCLK_FREQ_HSE
    
24. static void SetSysClockToHSE(void);
    
25. #elif defined SYSCLK_FREQ_24MHz
    
26. static void SetSysClockTo24(void);
    
27. #elif defined SYSCLK_FREQ_72MHz
    
28. static void SetSysClockTo72(void);
    
29. #endif
    
30. 
    
31. void SystemInit(void)
    
32. {
    
33.     RCC_DeInit();
    
34.     /* Configure the System clock frequency, HCLK, PCLK2 and PCLK1 prescalers */
    
35.     /* Configure the Flash Latency cycles and enable prefetch buffer */
    
36.     SetSysClock();
    
37.     NVIC_SetVectorTable(NVIC_VectTab_FLASH, VECT_TAB_OFFSET);
    
38. }
    
39. 
    
40. void SystemCoreClockUpdate(void)
    
41. {
    
42.     RCC_ClocksTypeDef clocks;
    
43.     RCC_GetClocksFreq(&clocks);
    
44.     SystemCoreClock = clocks.SYSCLK_Frequency;
    
45. }
    
46. 
    
47. static void SetSysClock(void)
    
48. {
    
49. #ifdef SYSCLK_FREQ_HSE
    
50.     SetSysClockToHSE();
    
51. #elif defined SYSCLK_FREQ_24MHz
    
52.     SetSysClockTo24();
    
53. #elif defined SYSCLK_FREQ_72MHz
    
54.     SetSysClockTo72();
    
55. #endif
    
56. } // If none of the define above is enabled, the HSI is used as System clock source (default after reset)
    
57. 
    
58. #ifdef SYSCLK_FREQ_HSE
    
59. static void SetSysClockToHSE(void)
    
60. {
    
61.     volatile unsigned long HSEStatus = 0;
    
62. 
    
63.     RCC_HSEConfig(RCC_HSE_ON);
    
64.     HSEStatus = RCC_WaitForHSEStartUp();
    
65. 
    
66.     if(HSEStatus == 0x01) {
    
67. 
    
68. #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL
    
69.         FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
    
70.         FLASH_SetLatency(FLASH_Latency_0);
    
71. #endif
    
72.         RCC_HCLKConfig(RCC_SYSCLK_Div1);    // AHB CLK = SYSCLK
    
73.         RCC_PCLK2Config(RCC_HCLK_Div1);// APB2 CLK = SYSCLK
    
74.         RCC_PCLK1Config(RCC_HCLK_Div1);// APB1 CLK = SYSCLK
    
75.         RCC_SYSCLKConfig(RCC_SYSCLKSource_HSE);
    
76. 
    
77.         while(RCC_GetSYSCLKSource() != 0x04);  /* Wait till HSE is used as system clock source */
    
78.     }
    
79.     else {
    
80.         // If HSE start-up failed, do something here.
    
81.     }
    
82. }
    
83. #elif defined SYSCLK_FREQ_24MHz
    
84. 
    
85. static void SetSysClockTo24(void)
    
86. {
    
87.     volatile unsigned long HSEStatus = 0;
    
88. 
    
89.     RCC_HSEConfig(RCC_HSE_ON);
    
90.     HSEStatus = RCC_WaitForHSEStartUp();
    
91. 
    
92.     if(HSEStatus == 0x01) {
    
93. 
    
94. #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL
    
95.         FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
    
96.         FLASH_SetLatency(FLASH_Latency_0);
    
97. #endif
    
98.         RCC_HCLKConfig(RCC_SYSCLK_Div1);    // AHB CLK = SYSCLK
    
99.         RCC_PCLK2Config(RCC_HCLK_Div1);     // APB2 CLK = SYSCLK
    
100.         RCC_PCLK1Config(RCC_HCLK_Div1);     // APB1 CLK = SYSCLK
     
101. 
     
102. #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
     
103.         RCC_PREDIV1Config(RCC_PREDIV1_Source_HSE, RCC_PREDIV1_Div2);
     
104.         RCC_PLLConfig(RCC_PLLSource_PREDIV1, RCC_PLLMul_6);
     
105. #else
     
106.         RCC_PLLConfig(RCC_PLLSource_HSE_Div2, RCC_PLLMul_6);
     
107. #endif
     
108.         RCC_PLLCmd(ENABLE);
     
109. 
     
110.         while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); /* Wait till PLL is ready */
     
111.         RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
     
112.         while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); /* Wait till PLL is ready */
     
113.         while(RCC_GetSYSCLKSource() != 0x08);  /* Wait till PLL is used as system clock source */
     
114.     }
     
115.     else {
     
116.     }
     
117. }
     
118. 
     
119. #elif defined SYSCLK_FREQ_72MHz
     
120. static void SetSysClockTo72(void)
     
121. {
     
122.     volatile unsigned long HSEStatus = 0;
     
123. 
     
124.     RCC_HSEConfig(RCC_HSE_ON);
     
125.     HSEStatus = RCC_WaitForHSEStartUp();
     
126. 
     
127.     if(HSEStatus == 0x01) {
     
128. 
     
129. #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL
     
130.         FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
     
131.         FLASH_SetLatency(FLASH_Latency_2);
     
132. #endif
     
133.         RCC_HCLKConfig(RCC_SYSCLK_Div1);    // AHB CLK = SYSCLK
     
134.         RCC_PCLK2Config(RCC_HCLK_Div1);     // APB2 CLK = SYSCLK
     
135.         RCC_PCLK1Config(RCC_HCLK_Div2);     // APB1 CLK = SYSCLK
     
136. 
     
137. #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
     
138.         RCC_PREDIV1Config(RCC_PREDIV1_Source_HSE, RCC_PREDIV1_Div1);
     
139.         RCC_PLLConfig(RCC_PLLSource_PREDIV1, RCC_PLLMul_9);
     
140. #else
     
141.         RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
     
142. #endif
     
143.         RCC_PLLCmd(ENABLE);
     
144. 
     
145.         while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); /* Wait till PLL is ready */
     
146.         RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
     
147.         while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); /* Wait till PLL is ready */
     
148.         while(RCC_GetSYSCLKSource() != 0x08);  /* Wait till PLL is used as system clock source */
     
149.     }
     
150.     else {
     
151.     }
     
152. }
     
153. #endif
     

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