ejung/avrIOhelper
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Add debouncing

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This commit is contained in:
Max Brüggemann
2021-08-21 15:00:32 +02:00
parent 8a442e9011
commit b8742f9021
3 changed files with 22 additions and 3 deletions
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23
io-helper.c
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@@ -2,20 +2,37 @@
#include "io-helper.h" #include "io-helper.h"
volatile uint8_t outStates[]={0,0,0,0}; volatile uint8_t outStates[]={0,0,0,0};
volatile uint8_t inStatesRaw[] = {0,0,0,0};
volatile uint8_t inStates[] = {0,0,0,0}; volatile uint8_t inStates[] = {0,0,0,0};
volatile uint8_t oldInstates[] = {0,0,0,0};
/* @brief: copies a single bit from one char to another char (or arrays thereof) /* @brief: copies a single bit from one char to another char (or arrays thereof)
* *
* *
*/ */
/*
void ioHelperCpArb(volatile uint8_t *source, uint16_t sourceNr,volatile uint8_t *target, uint16_t targetNr) { void ioHelperCpArb(volatile uint8_t *source, uint16_t sourceNr,volatile uint8_t *target, uint16_t targetNr) {
if(*(source+(sourceNr/8))&(1<<(sourceNr-((sourceNr/8)*8)))) if(*(source+(sourceNr/8))&(1<<(sourceNr-((sourceNr/8)*8))))
{ {
*(target+(targetNr/8))|=(1<<(targetNr-((targetNr/8)*8))); *(target+(targetNr/8))|=(1<<(targetNr-((targetNr/8)*8)));
} else *(target+(targetNr/8))&=~(1<<(targetNr-((targetNr/8)*8))); } else *(target+(targetNr/8))&=~(1<<(targetNr-((targetNr/8)*8)));
} }
*/
volatile uint8_t ioHelperDebounceTable[32];
/* debounceing: */
void ioHelperDebounce(void) {
static volatile uint8_t tablePos=0;
for(uint8_t i = 0; i<16; i++) {
ioHelperCpArb(inStatesRaw,i,ioHelperDebounceTable,i*8+tablePos);
if(ioHelperDebounceTable[i]==0) ioHelperSetBit(inStates,i,0);
else if(ioHelperDebounceTable[i]==0xFF) ioHelperSetBit(inStates,i,1);
}
if (tablePos<7) {
tablePos++;
} else tablePos=0;
}
void ioHelperSetBit(volatile uint8_t *list, uint8_t nr, uint8_t state) { void ioHelperSetBit(volatile uint8_t *list, uint8_t nr, uint8_t state) {
unsigned char ArC=0; unsigned char ArC=0;
@@ -34,7 +51,7 @@ unsigned char ioHelperReadBit(volatile uint8_t *list, uint8_t nr) {
} }
void ioHelperCpBit(uint8_t reg, uint8_t bi, uint8_t bo) { void ioHelperCpBit(uint8_t reg, uint8_t bi, uint8_t bo) {
ioHelperSetBit(inStates,bo,reg&(1<<bi)); ioHelperSetBit(inStatesRaw,bo,reg&(1<<bi));
} }
uint8_t getBit1(uint8_t bit) { uint8_t getBit1(uint8_t bit) {

1
io-helper.h
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@@ -5,6 +5,7 @@ void ioHelperReadPins(void);
void ioHelperIoConf(void); void ioHelperIoConf(void);
void ioHelperSetBit(volatile uint8_t *list, uint8_t nr, uint8_t state); void ioHelperSetBit(volatile uint8_t *list, uint8_t nr, uint8_t state);
unsigned char ioHelperReadBit(volatile uint8_t *list, uint8_t nr); unsigned char ioHelperReadBit(volatile uint8_t *list, uint8_t nr);
void ioHelperDebounce(void);
//Outputs //Outputs

1
main.c
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@@ -6,6 +6,7 @@ int main(void) {
while(1) { while(1) {
ioHelperSetOuts(); //write data from outStates to ports ioHelperSetOuts(); //write data from outStates to ports
ioHelperReadPins(); //read pins, arrange data into inStates ioHelperReadPins(); //read pins, arrange data into inStates
ioHelperDebounce();
//read a specific bit from inStates //read a specific bit from inStates
if(ioHelperReadBit(inStates,BitPinC5)) { if(ioHelperReadBit(inStates,BitPinC5)) {