PWM
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文件大小:236KB
下载次数:10
上传日期:2012-12-20 09:56:22
上 传 者:
xiao_mu_
说明: 采用意法半导体开发工具sttool,基于stm8s的PWM调制程序。输出脉冲序列
(STMicroelectronics Development Tools sttool, based PWM modulation stm8s the process.The output pulse sequence)
文件列表:
PWM\library\inc\stm8s_adc1.h (15301, 2008-09-25)
PWM\library\inc\stm8s_adc2.h (11058, 2008-09-25)
PWM\library\inc\stm8s_awu.h (4967, 2008-09-25)
PWM\library\inc\stm8s_beep.h (3569, 2008-09-25)
PWM\library\inc\stm8s_clk.h (17341, 2008-09-25)
PWM\library\inc\stm8s_exti.h (4568, 2008-09-25)
PWM\library\inc\stm8s_flash.h (10521, 2008-09-25)
PWM\library\inc\stm8s_gpio.h (6333, 2008-09-25)
PWM\library\inc\stm8s_i2c.h (15187, 2008-09-25)
PWM\library\inc\stm8s_itc.h (4272, 2008-09-25)
PWM\library\inc\stm8s_iwdg.h (4582, 2008-09-25)
PWM\library\inc\stm8s_lib.h (3259, 2008-09-25)
PWM\library\inc\stm8s_macro.h (6134, 2008-09-25)
PWM\library\inc\stm8s_map.h (79179, 2008-09-25)
PWM\library\inc\stm8s_rst.h (2813, 2008-09-25)
PWM\library\inc\stm8s_spi.h (12771, 2008-09-25)
PWM\library\inc\stm8s_tim1.h (24592, 2008-09-25)
PWM\library\inc\stm8s_tim2.h (13546, 2008-09-25)
PWM\library\inc\stm8s_tim3.h (12506, 2008-09-25)
PWM\library\inc\stm8s_tim4.h (5133, 2008-09-25)
PWM\library\inc\stm8s_type.h (3451, 2008-09-25)
PWM\library\inc\stm8s_uart1.h (15114, 2008-09-25)
PWM\library\inc\stm8s_uart2.h (17366, 2008-09-25)
PWM\library\inc\stm8s_uart3.h (13608, 2008-09-25)
PWM\library\inc\stm8s_wwdg.h (2390, 2008-09-25)
PWM\library\src\stm8s_adc1.c (26973, 2008-09-25)
PWM\library\src\stm8s_adc2.c (17083, 2008-09-25)
PWM\library\src\stm8s_awu.c (9436, 2008-09-25)
PWM\library\src\stm8s_beep.c (7199, 2008-09-25)
PWM\library\src\stm8s_clk.c (26492, 2008-09-26)
PWM\library\src\stm8s_exti.c (6926, 2008-09-25)
PWM\library\src\stm8s_flash.c (21474, 2008-09-25)
PWM\library\src\stm8s_gpio.c (10880, 2008-09-25)
PWM\library\src\stm8s_i2c.c (25947, 2008-09-25)
PWM\library\src\stm8s_itc.c (8907, 2008-09-25)
PWM\library\src\stm8s_iwdg.c (6140, 2008-09-25)
PWM\library\src\stm8s_rst.c (3427, 2008-09-25)
PWM\library\src\stm8s_spi.c (16784, 2008-09-25)
PWM\library\src\stm8s_tim1.c (103295, 2008-09-25)
PWM\library\src\stm8s_tim2.c (56866, 2008-09-25)
... ...
/** @page TIM1_7PWM_Output Generate 7 PWM signals with 4 different duty cycles
@par Example description
This example runs on STM8S-128K and STM8S-32K products.
This example shows how to configure the TIM1 peripheral to generate 7 PWM signals
with 4 different duty cycles.
TIM1CLK is fixed to 2 MHz, the TIM1 Prescaler is equal to 0 so the TIM1 counter
clock used is 2 MHz. (By default, fTimer1= fMaster/8 )
TIM1 frequency is defined as follows:
TIM1 frequency = TIM1 counter clock / (TIM1_Period + 1) = 488.28 Hz.
The TIM1 CCR1 register value is equal to 0x7FF, so the TIM1 Channel 1 and TIM1
Channel 1N generate a PWM signal with a frequency equal to 488.28Hz
and a duty cycle equal to:
TIM1 Channel1 duty cycle = TIM1_CCR1 /( TIM1_Period + 1) = 50%.
The TIM1 CCR2 register value is equal to 0x5FF, so the TIM1 Channel 2 and TIM1
Channel 2N generate a PWM signal with a frequency equal to 488.28 Hz
and a duty cycle equal to:
TIM1 Channel2 duty cycle = TIM1_CCR2 / ( TIM1_Period + 1)= 37.5%.
The TIM1 CCR3 register value is equal to 0x3FF, so the TIM1 Channel 3 and TIM1
Channel 3N generate a PWM signal with a frequency equal to 488.28 Hz
and a duty cycle equal to:
TIM1 Channel3 duty cycle = TIM1_CCR3 / ( TIM1_Period + 1) = 25%.
The TIM1 CCR4 register value is equal to 0x1FF, so the TIM1 Channel 4
generate a PWM signal with a frequency equal to 488.28 Hz
and a duty cycle equal to:
TIM1 Channel4 duty cycle = TIM1_CCR4 / ( TIM1_Period + 1) = 12.5%.
The TIM1 waveform can be displayed using an oscilloscope.
@par Directory contents
- main.c Main file containing the "main" function
- stm8s_conf.h Library Configuration file
- stm8s_it.c Interrupt routines source (not used in this example)
- stm8s_it.h Interrupt routines declaration
- stm8_interrupt_vector.c Interrupt vectors table
@par Hardware environment
Connect the TIM1 pins to an oscilloscope:
- TIM1_CH1 pin (PC.1)
- TIM1_CH1N pin (PH.7)
- TIM1_CH2 pin (PC.2)
- TIM1_CH2N pin (PH.6)
- TIM1_CH3 pin (PC.3)
- TIM1_CH3N pin (PH.5)
- TIM1_CH4 pin (PC.4)
@par How to use it ?
In order to make the program work, you must do the following :
- Create a project and setup all project configuration
- Compile the directory content files and required Library files :
+ stm8s_tim1.c
+ stm8s_gpio.c
- Rebuild all files: Project->Rebuild all.
- Load project image: Debug->Start/Stop Debug Session
- Run program: Debug->Run (F5)
- Connect the TIM1 pins to an oscilloscope
Go to main file: TIM1_7PWM_Output\main.c
*/
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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