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Make software USART used in the XPLAINBridge project directly check and store into the ring buffers, rather than polling from the main program loop to avoid added latency.

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This commit is contained in:
Dean Camera 2010-05-26 06:59:55 +00:00
parent 9b29d1dc50
commit 79742c5d24
5 changed files with 42 additions and 68 deletions
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20
Projects/XPLAINBridge/Lib/SoftUART.h
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@ -37,6 +37,9 @@
#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdbool.h>
#include "../XPLAINBridge.h"
#include "LightweightRingBuff.h"
/* Macros: */
#define BAUD 9600
@ -50,24 +53,7 @@
#define STXPORT PORTD
#define STXDDR DDRD
/* External Variables: */
extern volatile bool srx_done;
extern volatile uint8_t stx_count;
/* Inline Functions: */
static inline bool SoftUART_IsReady(void)
{
return !(stx_count);
}
static inline bool SoftUART_IsReceived(void)
{
return srx_done;
}
/* Function Prototypes: */
void SoftUART_TxByte(uint8_t c);
uint8_t SoftUART_RxByte(void);
void SoftUART_Init(void);
#endif