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comparison libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/SysTick/TimeBase/main.c @ 0:c59513fd84fb
Initial commit of STM32 test code.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Mon, 03 Oct 2011 21:19:15 +1030 |
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1 /** | |
2 ****************************************************************************** | |
3 * @file SysTick/TimeBase/main.c | |
4 * @author MCD Application Team | |
5 * @version V3.5.0 | |
6 * @date 08-April-2011 | |
7 * @brief Main program body. | |
8 ****************************************************************************** | |
9 * @attention | |
10 * | |
11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS | |
12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE | |
13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY | |
14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING | |
15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE | |
16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. | |
17 * | |
18 * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> | |
19 ****************************************************************************** | |
20 */ | |
21 | |
22 /* Includes ------------------------------------------------------------------*/ | |
23 #include "main.h" | |
24 | |
25 /** @addtogroup STM32F10x_StdPeriph_Examples | |
26 * @{ | |
27 */ | |
28 | |
29 /** @addtogroup SysTick_TimeBase | |
30 * @{ | |
31 */ | |
32 | |
33 /* Private typedef -----------------------------------------------------------*/ | |
34 /* Private define ------------------------------------------------------------*/ | |
35 /* Private macro -------------------------------------------------------------*/ | |
36 /* Private variables ---------------------------------------------------------*/ | |
37 static __IO uint32_t TimingDelay; | |
38 | |
39 /* Private function prototypes -----------------------------------------------*/ | |
40 void Delay(__IO uint32_t nTime); | |
41 | |
42 /* Private functions ---------------------------------------------------------*/ | |
43 | |
44 /** | |
45 * @brief Main program. | |
46 * @param None | |
47 * @retval None | |
48 */ | |
49 int main(void) | |
50 { | |
51 /*!< At this stage the microcontroller clock setting is already configured, | |
52 this is done through SystemInit() function which is called from startup | |
53 file (startup_stm32f10x_xx.s) before to branch to application main. | |
54 To reconfigure the default setting of SystemInit() function, refer to | |
55 system_stm32f10x.c file | |
56 */ | |
57 | |
58 /* Initialize Leds mounted on STM3210X-EVAL board */ | |
59 STM_EVAL_LEDInit(LED1); | |
60 STM_EVAL_LEDInit(LED2); | |
61 STM_EVAL_LEDInit(LED3); | |
62 STM_EVAL_LEDInit(LED4); | |
63 | |
64 /* Turn on LED1 and LED3 */ | |
65 STM_EVAL_LEDOn(LED1); | |
66 STM_EVAL_LEDOn(LED3); | |
67 | |
68 /* Setup SysTick Timer for 1 msec interrupts. | |
69 ------------------------------------------ | |
70 1. The SysTick_Config() function is a CMSIS function which configure: | |
71 - The SysTick Reload register with value passed as function parameter. | |
72 - Configure the SysTick IRQ priority to the lowest value (0x0F). | |
73 - Reset the SysTick Counter register. | |
74 - Configure the SysTick Counter clock source to be Core Clock Source (HCLK). | |
75 - Enable the SysTick Interrupt. | |
76 - Start the SysTick Counter. | |
77 | |
78 2. You can change the SysTick Clock source to be HCLK_Div8 by calling the | |
79 SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8) just after the | |
80 SysTick_Config() function call. The SysTick_CLKSourceConfig() is defined | |
81 inside the misc.c file. | |
82 | |
83 3. You can change the SysTick IRQ priority by calling the | |
84 NVIC_SetPriority(SysTick_IRQn,...) just after the SysTick_Config() function | |
85 call. The NVIC_SetPriority() is defined inside the core_cm3.h file. | |
86 | |
87 4. To adjust the SysTick time base, use the following formula: | |
88 | |
89 Reload Value = SysTick Counter Clock (Hz) x Desired Time base (s) | |
90 | |
91 - Reload Value is the parameter to be passed for SysTick_Config() function | |
92 - Reload Value should not exceed 0xFFFFFF | |
93 */ | |
94 if (SysTick_Config(SystemCoreClock / 1000)) | |
95 { | |
96 /* Capture error */ | |
97 while (1); | |
98 } | |
99 | |
100 while (1) | |
101 { | |
102 /* Toggle LED2 and LED4 */ | |
103 STM_EVAL_LEDToggle(LED2); | |
104 STM_EVAL_LEDToggle(LED4); | |
105 | |
106 /* Insert 50 ms delay */ | |
107 Delay(50); | |
108 | |
109 /* Toggle LED1 and LED3 */ | |
110 STM_EVAL_LEDToggle(LED1); | |
111 STM_EVAL_LEDToggle(LED3); | |
112 | |
113 /* Insert 100 ms delay */ | |
114 Delay(100); | |
115 } | |
116 } | |
117 | |
118 /** | |
119 * @brief Inserts a delay time. | |
120 * @param nTime: specifies the delay time length, in milliseconds. | |
121 * @retval None | |
122 */ | |
123 void Delay(__IO uint32_t nTime) | |
124 { | |
125 TimingDelay = nTime; | |
126 | |
127 while(TimingDelay != 0); | |
128 } | |
129 | |
130 /** | |
131 * @brief Decrements the TimingDelay variable. | |
132 * @param None | |
133 * @retval None | |
134 */ | |
135 void TimingDelay_Decrement(void) | |
136 { | |
137 if (TimingDelay != 0x00) | |
138 { | |
139 TimingDelay--; | |
140 } | |
141 } | |
142 | |
143 #ifdef USE_FULL_ASSERT | |
144 | |
145 /** | |
146 * @brief Reports the name of the source file and the source line number | |
147 * where the assert_param error has occurred. | |
148 * @param file: pointer to the source file name | |
149 * @param line: assert_param error line source number | |
150 * @retval None | |
151 */ | |
152 void assert_failed(uint8_t* file, uint32_t line) | |
153 { | |
154 /* User can add his own implementation to report the file name and line number, | |
155 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ | |
156 | |
157 /* Infinite loop */ | |
158 while (1) | |
159 { | |
160 } | |
161 } | |
162 | |
163 #endif | |
164 | |
165 /** | |
166 * @} | |
167 */ | |
168 | |
169 /** | |
170 * @} | |
171 */ | |
172 | |
173 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |