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comparison libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/Parallel_Synchro/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/Parallel_Synchro/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_Parallel_Synchro
30 * @{
31 */
32
33 /* Private typedef -----------------------------------------------------------*/
34 /* Private define ------------------------------------------------------------*/
35 /* Private macro -------------------------------------------------------------*/
36 /* Private variables ---------------------------------------------------------*/
37 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
38 TIM_OCInitTypeDef TIM_OCInitStructure;
39
40 /* Private function prototypes -----------------------------------------------*/
41 void RCC_Configuration(void);
42 void GPIO_Configuration(void);
43
44 /* Private functions ---------------------------------------------------------*/
45
46 /**
47 * @brief Main program
48 * @param None
49 * @retval None
50 */
51 int main(void)
52 {
53 /*!< At this stage the microcontroller clock setting is already configured,
54 this is done through SystemInit() function which is called from startup
55 file (startup_stm32f10x_xx.s) before to branch to application main.
56 To reconfigure the default setting of SystemInit() function, refer to
57 system_stm32f10x.c file
58 */
59
60 /* System Clocks Configuration */
61 RCC_Configuration();
62
63 /* GPIO Configuration */
64 GPIO_Configuration();
65
66 /* Timers synchronisation in parallel mode ----------------------------
67 1/TIM2 is configured as Master Timer:
68 - PWM Mode is used
69 - The TIM2 Update event is used as Trigger Output
70 2/TIM3 and TIM4 are slaves for TIM2,
71 - PWM Mode is used
72 - The ITR1(TIM2) is used as input trigger for both slaves
73 - Gated mode is used, so starts and stops of slaves counters
74 are controlled by the Master trigger output signal(update event).
75
76 * For Low-density, Medium-density, High-density and Connectivity line devices:
77 The TIMxCLK is fixed to 72 MHz, the TIM2 counter clock is 72 MHz.
78 The Master Timer TIM2 is running at 281.250 KHz and the duty cycle
79 is equal to 25%
80 The TIM3 is running:
81 - At (TIM2 frequency)/ (TIM3 period + 1) = 28.125 KHz and a duty cycle
82 equal to TIM3_CCR1/(TIM3_ARR + 1) = 30%
83 The TIM4 is running:
84 - At (TIM2 frequency)/ (TIM4 period + 1) = 56.250 KHz and a duty cycle
85 equal to TIM4_CCR1/(TIM4_ARR + 1) = 60%
86
87 * For Value line devices:
88 The TIMxCLK is fixed to 24 MHz, the TIM2 counter clock is 24 MHz.
89 TIM2 frequency = 93.750 KHz,
90 TIM3 frequency = 23.437 KHz,
91 TIM4 frequency = 18.75 KHz
92 -------------------------------------------------------------------- */
93
94 /* Time base configuration */
95 TIM_TimeBaseStructure.TIM_Period = 255;
96 TIM_TimeBaseStructure.TIM_Prescaler = 0;
97 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
98 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
99
100 TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
101
102 TIM_TimeBaseStructure.TIM_Period = 9;
103 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
104
105 TIM_TimeBaseStructure.TIM_Period = 4;
106 TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
107
108 /* Master Configuration in PWM1 Mode */
109 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
110 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
111 TIM_OCInitStructure.TIM_Pulse = 64;
112 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
113
114 TIM_OC1Init(TIM2, &TIM_OCInitStructure);
115
116 /* Select the Master Slave Mode */
117 TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable);
118
119 /* Master Mode selection */
120 TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);
121
122 /* Slaves Configuration: PWM1 Mode */
123 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
124 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
125 TIM_OCInitStructure.TIM_Pulse = 3;
126
127 TIM_OC1Init(TIM3, &TIM_OCInitStructure);
128
129 TIM_OC1Init(TIM4, &TIM_OCInitStructure);
130
131 /* Slave Mode selection: TIM3 */
132 TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Gated);
133 TIM_SelectInputTrigger(TIM3, TIM_TS_ITR1);
134
135 /* Slave Mode selection: TIM4 */
136 TIM_SelectSlaveMode(TIM4, TIM_SlaveMode_Gated);
137 TIM_SelectInputTrigger(TIM4, TIM_TS_ITR1);
138
139 /* TIM enable counter */
140 TIM_Cmd(TIM3, ENABLE);
141 TIM_Cmd(TIM2, ENABLE);
142 TIM_Cmd(TIM4, ENABLE);
143
144 while (1)
145 {}
146 }
147
148 /**
149 * @brief Configures the different system clocks.
150 * @param None
151 * @retval None
152 */
153 void RCC_Configuration(void)
154 {
155 /* TIM2, TIM3 and TIM4 clock enable */
156 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3 |
157 RCC_APB1Periph_TIM4, ENABLE);
158
159 /* GPIOA, GPIOB, GPIOC and AFIO clocks enable */
160 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
161 RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
162 }
163
164 /**
165 * @brief Configure the GPIO Pins.
166 * @param None
167 * @retval None
168 */
169 void GPIO_Configuration(void)
170 {
171 GPIO_InitTypeDef GPIO_InitStructure;
172
173 #ifdef STM32F10X_CL
174 /*GPIOB Configuration: PC6(TIM3 CH1) as alternate function push-pull */
175 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 ;
176 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
177 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
178
179 GPIO_Init(GPIOC, &GPIO_InitStructure);
180
181 GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);
182
183 #else
184 /* GPIOA Configuration: PA6(TIM3 CH1) as alternate function push-pull */
185 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
186 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
187 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
188
189 GPIO_Init(GPIOA, &GPIO_InitStructure);
190 #endif
191 /* GPIOA Configuration: PA0(TIM2 CH1) as alternate function push-pull */
192 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
193 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
194 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
195
196 GPIO_Init(GPIOA, &GPIO_InitStructure);
197
198 /* GPIOB Configuration: PB6(TIM4 CH1) as alternate function push-pull */
199 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
200
201 GPIO_Init(GPIOB, &GPIO_InitStructure);
202 }
203
204 #ifdef USE_FULL_ASSERT
205
206 /**
207 * @brief Reports the name of the source file and the source line number
208 * where the assert_param error has occurred.
209 * @param file: pointer to the source file name
210 * @param line: assert_param error line source number
211 * @retval None
212 */
213 void assert_failed(uint8_t* file, uint32_t line)
214 {
215 /* User can add his own implementation to report the file name and line number,
216 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
217
218 while (1)
219 {}
220 }
221
222 #endif
223
224 /**
225 * @}
226 */
227
228 /**
229 * @}
230 */
231
232 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/