void event(int16_t result)
{
static int i = 0;
sei();
/* The printf in an interrupt is not a good idea, but ok for
* the test program */
printf_P(PSTR("from interrupt : ADC%i = %i\n"),i,result);
if(++i != 8)
adc_launch( ADC_REF_AVCC | ( MUX_ADC0 + i ) | ADC_MODE_INT );
else
i = 0; /* end, reinitialisation for the next time */
}
static void adc_event(int16_t result)
{
static uint8_t i = 0;
/* filter value if needed */
if (adc_infos[i].filter)
adc_infos[i].value = adc_infos[i].filter(&adc_infos[i],
result);
else
adc_infos[i].value = result;
i ++;
if (i >= ADC_MAX)
i = 0;
else
adc_launch(adc_infos[i].config);
}
/* called every 10 ms, see init below */
static void do_adc(void *dummy)
{
/* launch first conversion */
adc_launch(adc_infos[0].config);
}
int main(void)
{
int16_t a; int32_t b;
uart_init();
fdevopen(uart0_dev_send,NULL);
sei();
adc_init();
while(1) {
printf_P(PSTR("\n\nHello everybody\n This is the ADC test\n"));
wait_ms(20);
/* simple polling */
a = adc_get_value( ADC_REF_AVCC | MUX_ADC0 );
printf_P(PSTR("polling : ADC0 = %i\n"),a);
wait_ms(20);
/* pre-launch */
adc_launch( ADC_REF_AVCC | MUX_ADC1 );
wait_ms(1);
/* this function should take less time */
a = adc_get_value( ADC_NO_CONFIG );
printf_P(PSTR("pre-launch : ADC1 = %i\n"),a);
wait_ms(20);
/* test of free running mode */
a = adc_get_value( ADC_REF_AVCC | MUX_ADC2 | ADC_MODE_TRIGGERED );
printf_P(PSTR("free run mode : ADC2 = %i\n"),a);
wait_ms(1);
/* this function should take less time */
a = adc_get_value( ADC_REF_AVCC | MUX_ADC3 | ADC_MODE_TRIGGERED );
printf_P(PSTR("free run mode : ADC3 = %i\n\n"),a);
wait_ms(1);
/* test of different outputs formats */
a = adc_get_value( ADC_REF_AVCC | MUX_ADC0 | ADC_MODE_16_BITS );
printf_P(PSTR("normal output 16: ADC0 = %u ( div = %u)\n"),
a, ((uint16_t)a)/(1<<6));
b = adc_get_value32( (void*)(ADC_REF_AVCC | MUX_ADC0 |
ADC_MODE_16_BITS) );
printf_P(PSTR("normal output 16(32): ADC0 = %ld ( div = %lu)\n"),
b, b/(1l<<6));
/* ADC_MODE_10_BITS default */
a = adc_get_value( ADC_REF_AVCC | MUX_ADC0 );
printf_P(PSTR("normal output 10: ADC0 = %u\n"),a);
/* ADC_MODE_10_BITS default */
b = adc_get_value32( (void*)(ADC_REF_AVCC | MUX_ADC0 ) );
printf_P(PSTR("normal output 10(32): ADC0 = %lu\n"),b);
printf_P(PSTR("now try a signed differential conversion\n"));
a = adc_get_value( ADC_REF_AVCC | MUX_ADC0 | ADC_MODE_10_BITS );
b = adc_get_value( ADC_REF_AVCC | MUX_ADC1 | ADC_MODE_10_BITS );
printf_P(PSTR("computed : ADC0-ADC1 = %i\n"),
((int16_t)a - (int16_t)b) /2);
a = adc_get_value( ADC_REF_AVCC | MUX_ADC0_ADC1);
printf_P(PSTR("signed output 10: ADC0-ADC1 = %i\n"),a);
b = adc_get_value32( (void*)(ADC_REF_AVCC | MUX_ADC0_ADC1 ) );
printf_P(PSTR("signed output 10(32): ADC0-ADC1 = %li\n"),b);
a = adc_get_value( ADC_REF_AVCC | MUX_ADC0_ADC1 |
ADC_MODE_16_BITS );
printf_P(PSTR("signed output 16: ADC0-ADC1 = %i ( div = %i)\n"),
a, a/(1<<6));
b = adc_get_value32( (void*)(ADC_REF_AVCC | MUX_ADC0_ADC1 |
ADC_MODE_16_BITS ) );
printf_P(PSTR("signed output 16(32): ADC0-ADC1 = %li ( div = %li)\n\n"),
b, b/(1<<6));
/* test of interrupt mode : we scan once the 8
inputs */
adc_register_event(event);
adc_launch( ADC_REF_AVCC | MUX_ADC0 | ADC_MODE_INT );
wait_ms(20);
wait_ms(2000);
}
return 0;
}
