ChibiOS Free Embedded RTOS

You are calling a pwmEnableChannel() from a callback, you cannot call normal APIs from ISR context, only I-Class functions.
Giovanni

like this?
#include "ch.h"
#include "hal.h"
#include "math.h"

static WORKING_AREA(pwm_ThreadWorkingArea, 128);

extern double angle;
extern double pwm ...

Probably main thread hangs... at compile time i`ve got warning:
..\main.c(17): warning: #1035-D: single-precision operand implicitly converted to double-precision
angle += 0.5;
may be this causes this behavior of the board.
I`ve changed increment to 1, warning disappears, but no changes on ...

You may generate the sinus directly via DAC.
This is good point. Can you provide some example code for this?

I have tried to use timers callback function to change pwm duty cycle. It works, generally, but some thing wrong with main loop.

#include "ch.h"
#include "hal.h"
#include "math ...

Hello all!
I`m trying to make emulation of sinus signal with pwm on stm32f4-discovery board.
Here is my code:

#include "ch.h"
#include "hal.h"
#include math.h

static PWMConfig pwmcfg = {
10000000, /* 10Mhz PWM clock frequency */
220, /* PWM period 220 duty cycles */
NULL,
{
{PWM ...