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The RingBuff library code has been replaced in the XPLAINBridge project with an ultra lightweight buffer to help improve the reliability of the bridge.

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This commit is contained in:
Dean Camera 2010-05-26 06:15:05 +00:00
parent 4a13a5484a
commit 9c037a952f
10 changed files with 69 additions and 283 deletions
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32
Projects/XPLAINBridge/Lib/SoftUART.c
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@ -32,34 +32,22 @@
#include "SoftUART.h"
volatile uint8_t srx_done, stx_count;
volatile uint8_t srx_data, srx_mask, srx_tmp, stx_data;
volatile bool srx_done;
volatile uint8_t stx_count;
static uint8_t srx_data, srx_mask, srx_tmp, stx_data;
uint8_t SoftUART_IsReady(void)
{
return !(stx_count);
}
uint8_t SoftUART_TxByte(uint8_t Byte)
void SoftUART_TxByte(uint8_t Byte)
{
while (stx_count);
stx_data = ~Byte;
stx_count = 10;
return Byte;
}
uint8_t SoftUART_IsReceived(void)
{
return srx_done;
}
uint8_t SoftUART_RxByte(void)
{
while (!(srx_done));
srx_done = 0;
srx_done = false;
return srx_data;
}
@ -74,9 +62,9 @@ void SoftUART_Init(void)
EIMSK = (1 << INT0); // enable INT0 interrupt
stx_count = 0; // nothing to send
srx_done = 0; // nothing received
STXPORT |= 1 << STX; // TX output
STXDDR |= 1 << STX; // TX output
srx_done = false; // nothing received
STXPORT |= (1 << STX); // TX output
STXDDR |= (1 << STX); // TX output
SRXPORT |= (1 << SRX); // pullup on INT0
}
@ -85,7 +73,7 @@ ISR(INT0_vect)
{
OCR2A = TCNT2 + (BIT_TIME / 8 * 3 / 2); // scan 1.5 bits after start
srx_tmp = 0; // clear bit storage
srx_tmp = 0; // clear bit storage
srx_mask = 1; // bit mask
TIFR2 = (1 << OCF2A); // clear pending interrupt
@ -111,7 +99,7 @@ ISR(TIMER2_COMPA_vect)
}
else
{
srx_done = 1; // mark rx data valid
srx_done = true; // mark rx data valid
srx_data = srx_tmp; // store rx data
TIMSK2 = (1 << OCIE2B); // enable tx and wait for start
EIMSK |= (1 << INT0); // enable START irq