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authortmk <nobody@nowhere>2013-02-22 19:38:06 +0900
committertmk <nobody@nowhere>2013-02-22 19:38:06 +0900
commit4ec8fd28230753452df7bc4111b60dc104f30267 (patch)
tree1098762b678f0ee74fe07e08b35807841b8a3257 /protocol/serial_soft.c
parent4a91d182776a956c5442debbaf7a8af047d429c0 (diff)
Fix softwere serial
Diffstat (limited to 'protocol/serial_soft.c')
-rw-r--r--protocol/serial_soft.c44
1 files changed, 17 insertions, 27 deletions
diff --git a/protocol/serial_soft.c b/protocol/serial_soft.c
index 47b1e4571d..af5110b4f6 100644
--- a/protocol/serial_soft.c
+++ b/protocol/serial_soft.c
@@ -48,23 +48,6 @@ POSSIBILITY OF SUCH DAMAGE.
#define WAIT_US (1000000/SERIAL_BAUD)
-#if 1
-#define WAIT_TICK (1000000/SERIAL_BAUD)
-#define WAIT4(tick) _delay_us(tick)
-#else
-#define WAIT_TICK ((16000000/SERIAL_BAUD)/4 - 5)
-static inline void WAIT4(uint8_t tick)
-{
- __asm__ __volatile__ (
- "1: dec %0" "\n\t"
- "nop" "\n\t"
- "brne 1b"
- :
- : "r" (tick)
- );
-}
-#endif
-
void serial_init(void)
{
SERIAL_RXD_INIT();
@@ -90,6 +73,18 @@ uint8_t serial_recv(void)
return data;
}
+int16_t serial_recv2(void)
+{
+ uint8_t data = 0;
+ if (rbuf_head == rbuf_tail) {
+ return -1;
+ }
+
+ data = rbuf[rbuf_tail];
+ rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE;
+ return data;
+}
+
void serial_send(uint8_t data)
{
/* signal state: IDLE: ON, START: OFF, STOP: ON, DATA0: OFF, DATA1: ON */
@@ -139,13 +134,11 @@ PORTD ^= 1<<7;
#endif
/* to center of start bit */
- //_delay_us(WAIT_US/2);
- WAIT4(WAIT_TICK/2);
+ _delay_us(WAIT_US/2);
PORTD ^= 1<<7;
do {
/* to center of next bit */
- //_delay_us(WAIT_US);
- WAIT4(WAIT_TICK);
+ _delay_us(WAIT_US);
PORTD ^= 1<<7;
if (SERIAL_RXD_READ()) {
@@ -160,18 +153,15 @@ PORTD ^= 1<<7;
} while (mask);
/* to center of parity bit */
- //_delay_us(WAIT_US);
- WAIT4(WAIT_TICK);
+ _delay_us(WAIT_US);
if (SERIAL_RXD_READ()) { parity ^= 1; }
PORTD ^= 1<<7;
/* to center of stop bit */
- //_delay_us(WAIT_US);
- WAIT4(WAIT_TICK);
+ _delay_us(WAIT_US);
uint8_t next = (rbuf_head + 1) % RBUF_SIZE;
- //if (parity && next != rbuf_tail) {
- if (next != rbuf_tail) {
+ if (parity && next != rbuf_tail) {
rbuf[rbuf_head] = data;
rbuf_head = next;
}