55 lines
948 B
C
55 lines
948 B
C
//
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// Telemetry Character FIFO
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//
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#include "Sunseeker2021.h"
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void CHAR_FIFO_INIT(char_fifo queue)
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{
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queue.GetPt=&queue.fifo[0];
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queue.PutPt=&queue.fifo[0];
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}
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int CHAR_FIFO_PUT(char_fifo *queue, char data)
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{
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unsigned char *tempPt;
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tempPt = queue->PutPt;
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*(tempPt++) = data;
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if(tempPt == &queue->fifo[fifo_size])
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{
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tempPt = &queue->fifo[0]; //need to wrap around
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}
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if(tempPt == queue->GetPt)
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{
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return(0); //Failure FIFO Full
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}
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else
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{
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queue->PutPt = tempPt;
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return(1); //successful
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}
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}
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int CHAR_FIFO_GET(char_fifo *queue, unsigned char volatile *data)
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{
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if(queue->PutPt == queue->GetPt)
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{
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return(0); //failure FIFO empty
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}
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else
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{
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*data = *(queue->GetPt++);
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if(queue->GetPt == &queue->fifo[fifo_size])
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{
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queue->GetPt = &queue->fifo[0]; //need to wrap around
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}
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return(1);
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}
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}
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int CHAR_FIFO_STAT(char_fifo *queue)
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{
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return (queue->GetPt != queue->PutPt);
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}
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