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comparison libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/OnePulse/main.c @ 0:c59513fd84fb

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Initial commit of STM32 test code.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 03 Oct 2011 21:19:15 +1030
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1 /**
2 ******************************************************************************
3 * @file TIM/OnePulse/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>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
19 ******************************************************************************
20 */
21
22 /* Includes ------------------------------------------------------------------*/
23 #include "stm32f10x.h"
24
25 /** @addtogroup STM32F10x_StdPeriph_Examples
26 * @{
27 */
28
29 /** @addtogroup TIM_OnePulse
30 * @{
31 */
32
33 /* Private typedef -----------------------------------------------------------*/
34 /* Private define ------------------------------------------------------------*/
35 /* Private macro -------------------------------------------------------------*/
36 /* Private variables ---------------------------------------------------------*/
37 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
38 TIM_ICInitTypeDef TIM_ICInitStructure;
39 TIM_OCInitTypeDef TIM_OCInitStructure;
40 uint16_t PrescalerValue = 0;
41
42 /* Private function prototypes -----------------------------------------------*/
43 void RCC_Configuration(void);
44 void GPIO_Configuration(void);
45
46 /* Private functions ---------------------------------------------------------*/
47
48 /**
49 * @brief Main program
50 * @param None
51 * @retval None
52 */
53 int main(void)
54 {
55 /*!< At this stage the microcontroller clock setting is already configured,
56 this is done through SystemInit() function which is called from startup
57 file (startup_stm32f10x_xx.s) before to branch to application main.
58 To reconfigure the default setting of SystemInit() function, refer to
59 system_stm32f10x.c file
60 */
61
62 /* System Clocks Configuration */
63 RCC_Configuration();
64
65 /* Configure the GPIO ports */
66 GPIO_Configuration();
67
68 /* TIM4 configuration: One Pulse mode ------------------------
69 The external signal is connected to TIM4_CH2 pin (PB.07),
70 The Rising edge is used as active edge,
71 The One Pulse signal is output on TIM4_CH1 pin (PB.06)
72 The TIM_Pulse defines the delay value
73 The (TIM_Period - TIM_Pulse) defines the One Pulse value.
74 TIM2CLK = SystemCoreClock, we want to get TIM2 counter clock at 24 MHz:
75 - Prescaler = (TIM2CLK / TIM2 counter clock) - 1
76 The Autoreload value is 65535 (TIM4->ARR), so the maximum frequency value
77 to trigger the TIM4 input is 24000000/65535 = 300 Hz.
78
79 The TIM_Pulse defines the delay value, the delay value is fixed
80 to 682.6 us:
81 delay = CCR1/TIM4 counter clock = 682.6 us.
82 The (TIM_Period - TIM_Pulse) defines the One Pulse value,
83 the pulse value is fixed to 2.048 ms:
84 One Pulse value = (TIM_Period - TIM_Pulse) / TIM4 counter clock = 2.048 ms.
85
86 * SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density
87 and Connectivity line devices and to 24 MHz for Value line devices
88 ------------------------------------------------------------ */
89
90 /* Compute the prescaler value */
91 PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
92 /* Time base configuration */
93 TIM_TimeBaseStructure.TIM_Period = 65535;
94 TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
95 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
96 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
97
98 TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
99
100 /* TIM4 PWM2 Mode configuration: Channel1 */
101 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
102 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
103 TIM_OCInitStructure.TIM_Pulse = 16383;
104 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
105
106 TIM_OC1Init(TIM4, &TIM_OCInitStructure);
107
108 /* TIM4 configuration in Input Capture Mode */
109
110 TIM_ICStructInit(&TIM_ICInitStructure);
111
112 TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
113 TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
114 TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
115 TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
116 TIM_ICInitStructure.TIM_ICFilter = 0;
117
118 TIM_ICInit(TIM4, &TIM_ICInitStructure);
119
120 /* One Pulse Mode selection */
121 TIM_SelectOnePulseMode(TIM4, TIM_OPMode_Single);
122
123 /* Input Trigger selection */
124 TIM_SelectInputTrigger(TIM4, TIM_TS_TI2FP2);
125
126 /* Slave Mode selection: Trigger Mode */
127 TIM_SelectSlaveMode(TIM4, TIM_SlaveMode_Trigger);
128
129 while (1)
130 {}
131 }
132
133 /**
134 * @brief Configures the different system clocks.
135 * @param None
136 * @retval None
137 */
138 void RCC_Configuration(void)
139 {
140 /* TIM4 clock enable */
141 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
142
143 /* GPIOB clock enable */
144 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
145 }
146
147 /**
148 * @brief Configure the GPIOD Pins.
149 * @param None
150 * @retval None
151 */
152 void GPIO_Configuration(void)
153 {
154 GPIO_InitTypeDef GPIO_InitStructure;
155
156 /* TIM4_CH1 pin (PB.06) configuration */
157 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
158 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
159 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
160
161 GPIO_Init(GPIOB, &GPIO_InitStructure);
162
163 /* TIM4_CH2 pin (PB.07) configuration */
164 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
165 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
166
167 GPIO_Init(GPIOB, &GPIO_InitStructure);
168 }
169
170 #ifdef USE_FULL_ASSERT
171
172 /**
173 * @brief Reports the name of the source file and the source line number
174 * where the assert_param error has occurred.
175 * @param file: pointer to the source file name
176 * @param line: assert_param error line source number
177 * @retval None
178 */
179 void assert_failed(uint8_t* file, uint32_t line)
180 {
181 /* User can add his own implementation to report the file name and line number,
182 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
183
184 while (1)
185 {}
186 }
187
188 #endif
189
190 /**
191 * @}
192 */
193
194 /**
195 * @}
196 */
197
198 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/