STM8L152C6T6 - PWM output compare

[gibba]

Posted on December 17, 2013 at 01:26

Hi everyone,

I need to generate a square wave and I've written some code but it doesn't work as i want. Can anyone help me with my doubts please?

first of all: I'm not sure that the following registers are in hexadecimal.. any ideas?

second: I didn't undestand what are the complementary output states PRACTICALLY.

third: any advices on this code? 

Thanks a lot for every help,

Gilberto

uint16_t TIM1_Prescaler=4;

uint16_t TIM1_Period=320; 

uint8_t TIM1_RepetitionCounter = 0;

uint16_t TIM1_Pulse = 190;

CLK_PeripheralClockConfig(CLK_Peripheral_TIM1, ENABLE);

TIM1_DeInit();

TIM1_TimeBaseInit(TIM1_Prescaler,TIM1_CounterMode_Up,TIM1_Period,TIM1_RepetitionCounter);

TIM1_OC1Init( TIM1_OCMode_PWM1,

                  TIM1_OutputState_Enable,

                  TIM1_OutputNState_Disable,

TIM1_Pulse,

                  TIM1_OCPolarity_High,

                  TIM1_OCNPolarity_Low,

                  TIM1_OCIdleState_Set,

                  TIM1_OCNIdleState_Reset);

TIM1_OC1PreloadConfig(ENABLE);

TIM1_ARRPreloadConfig(ENABLE);

TIM1_Cmd(ENABLE);

#stm8l-stm8-pwm

[chen]

Posted on December 17, 2013 at 10:51

Hi

''I'm not sure that the following registers are in hexadecimal.. any ideas?''

In general, if you do not specify the number format the compiler will assume

the number is in decimal.

So

''

uint16_t TIM1_Prescaler=4;

uint16_t TIM1_Period=320; 

uint8_t TIM1_RepetitionCounter = 0;

uint16_t TIM1_Pulse = 190;''

This code will set the registers to

4

320

0

190

all in decimal.

To specify the number in hexadecimal add '0x' in front of the number

eg 0x0 = 0 decimal

0xf = 15 decimal.

Sorry, cannot help with the timer setup - I work on stm32 not stm8