-/* gpio.c */
-void init_gpio();
-void susp_gpio();
-void gpio_set(unsigned char n, unsigned char on);
-
-/* ambient.c */
-#define AMBIENT_ADC_SHIFT 0 /* 1 measurement per callback */
-void init_ambient();
-extern volatile unsigned char ambient_zone;
-void ambient_adc(uint16_t adc_val);
-