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| author | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-26 06:15:05 +0000 |
|---|---|---|
| committer | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-26 06:15:05 +0000 |
| commit | 9c037a952f5aaf78c4e13398506cfa2d588bb449 (patch) | |
| tree | ee69e6a65a6d81851005c977deceded153d5c2af /Projects/XPLAINBridge/Lib/SoftUART.c | |
| parent | 4a13a5484ae19974a46d3def668aa888d12b8f13 (diff) | |
| download | lufa-9c037a952f5aaf78c4e13398506cfa2d588bb449.tar.gz lufa-9c037a952f5aaf78c4e13398506cfa2d588bb449.tar.bz2 lufa-9c037a952f5aaf78c4e13398506cfa2d588bb449.zip | |
The RingBuff library code has been replaced in the XPLAINBridge project with an ultra lightweight buffer to help improve the reliability of the bridge.
Diffstat (limited to 'Projects/XPLAINBridge/Lib/SoftUART.c')
| -rw-r--r-- | Projects/XPLAINBridge/Lib/SoftUART.c | 32 |
1 files changed, 10 insertions, 22 deletions
diff --git a/Projects/XPLAINBridge/Lib/SoftUART.c b/Projects/XPLAINBridge/Lib/SoftUART.c index 194481d0e..5e589f3d7 100644 --- a/Projects/XPLAINBridge/Lib/SoftUART.c +++ b/Projects/XPLAINBridge/Lib/SoftUART.c @@ -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 |