ChibiOS Free Embedded RTOS

What does chSysLockFromIsr(); exactly Does ??? I have had that question since im using CHibiOS.
And why do i have to use I functions when i use chSysLockFromIsr();?

Thanks!

But, where are they??

Hi, everybody, i hope you be fine.

I want to send some data throught the USB port like a Serial Driver.
Is Someone have an example of that ??

I'd appreciate that, thanks!!!!

But i use that function FROMISR() because in the STM32F4 example you uses that a lot... i read the documentation about that function and i dont understood >/

Hi to everyone,
i have this code

#include "ch.h"
#include "hal.h"
#include "test.h"

static void pwmpcb(PWMDriver *pwmp);
static void adccb(ADCDriver *adcp, adcsample_t *buffer, size_t n);
static void spicb(SPIDriver *spip);

int avg_ch1, avg_ch2;
int bla= 0x0400;
int dat1,dat2 ...