ejung/avrIOhelper
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add edge detection code

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This commit is contained in:
Max Nowka
2021-08-22 17:06:20 +02:00
parent 545e7f380d
commit c530411395
2 changed files with 18 additions and 1 deletions
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13
io-helper.c
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@@ -4,7 +4,20 @@
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 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}; volatile uint8_t oldInstates[] = {0,0,0,0};
volatile uint8_t inStatesBothEdges[] = {0,0,0,0};
volatile uint8_t inStatesRisingEdge[] = {0,0,0,0};
volatile uint8_t inStatesFallingEdge[] = {0,0,0,0};
void ioHelperEdgeDetector(void){
for (uint8_t i = 0; i < 4; i++){
inStatesBothEdges[i] = oldInstates[i] ^ inStates[i];
inStatesRisingEdge[i] = inStatesBothEdges[i] & inStates[i];
inStatesFallingEdge[i] = inStatesBothEdges[i] & oldInstates[i];
oldInstates[i] = inStates[i];
}
}
/* @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)

6
io-helper.h
View File

@@ -6,6 +6,10 @@
extern volatile uint8_t outStates[4]; extern volatile uint8_t outStates[4];
extern volatile uint8_t inStates[4]; extern volatile uint8_t inStates[4];
extern volatile uint8_t ioHelperDebounceTable[32]; extern volatile uint8_t ioHelperDebounceTable[32];
extern volatile uint8_t oldInstates[4];
extern volatile uint8_t inStatesBothEdges[4];
extern volatile uint8_t inStatesRisingEdge[4];
extern volatile uint8_t inStatesFallingEdge[4];
void ioHelperSetOuts(void); void ioHelperSetOuts(void);
void ioHelperReadPins(void); void ioHelperReadPins(void);
@@ -13,7 +17,7 @@ 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); void ioHelperDebounce(void);
void ioHelperEdgeDetector(void);
//Outputs //Outputs
//Pin | Bit in outStates //Pin | Bit in outStates