hwa/espressif/esp8266/examples/01-1-blink-soft/user.c

Blink a LED using an OS timer.

This program configures the LED pin as a digital output, then in an infinite loop it toggles the LED state using an OS timer.

Symbols:

• BOARD_H is the name of the target board definition file. It can be specified at compile time via the command line. If not, the Makefile will set it to attiny84 by default. For example, make BOARD=nanodccduino will lead to BOARD_H defined as <boards/nanodccduino.h>. See Development boards for the list of board definition files provided.
• PIN_LED is the name of the I/O pin at which a LED is connected. It is defined in the target board header file.

user.c

 
#include BOARD_H
 
#define IROM            __attribute__((section (".irom.text")))
#define IRAM
 
#if !defined PIN_LED
#  define PIN_LED       gpio2
#endif
 
 
/*  Function called every 10 ms.
 *    Toggle the LED on/off.
 */
void IROM every10ms ( )
{
  if ( hw( read, PIN_LED ) == 0 )
    hw( write, PIN_LED, 1 );
  else
    hw( write, PIN_LED, 1 );
}
 
 
void IROM user_init()
{
  /*  Configure the LED output
   */
  hw( configure, PIN_LED, mode, digital_output );
 
  /*  Trigger a function call every 10 ms (about)
   */
  static os_timer_t timer ;
 
  os_timer_disarm( &timer );
  os_timer_setfn( &timer, (os_timer_func_t *)every10ms, NULL );
  os_timer_arm( &timer, 10, 1 );
}