PlexSheep
/
sysprog-basic
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

comments

This commit is contained in:
Christoph J. Scherr 2023-12-09 14:38:14 +01:00
parent c5bc169461
commit d21ee49106
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/adc.c
View File

@ -5,13 +5,13 @@
#include <util/delay.h> #include <util/delay.h>
void adc_init() { void adc_init() {
DDRC=0x0; // does not exist but is default? DDRC=0x0; // read from port c
ADCSRA = (1<<ADEN)|(1<<ADPS1)|(1<<ADPS2); ADCSRA = (1<<ADEN)|(1<<ADPS1)|(1<<ADPS2); // magic enable adc
ADMUX = (1<<REFS0); ADMUX = (1<<REFS0); // magic enable multiplexer
} }
uint16_t adc_read(uint8_t channel) { uint16_t adc_read(uint8_t channel) {
ADMUX &= 0xf0; // max channel? ADMUX &= 0xf0; // max channel?
ADMUX |= (channel & 0x0f); // select channel ADMUX |= (channel & 0x0f); // select channel, max 2^4?
ADCSRA |= (1<<ADSC); // interrupt enable ADCSRA |= (1<<ADSC); // interrupt enable
while((ADCSRA&(1<<ADIF))==0); // wait for something while((ADCSRA&(1<<ADIF))==0); // wait for something
return ADCL + (ADCH << 8); // read return ADCL + (ADCH << 8); // read