summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--keyboard/hhkb_rn42/MEMO.txt1
-rw-r--r--keyboard/hhkb_rn42/config.h17
-rw-r--r--keyboard/hhkb_rn42/rn42/rn42_task.c2
-rw-r--r--protocol/serial_uart.c19
4 files changed, 30 insertions, 9 deletions
diff --git a/keyboard/hhkb_rn42/MEMO.txt b/keyboard/hhkb_rn42/MEMO.txt
index 100b4442d6..86f5faef2d 100644
--- a/keyboard/hhkb_rn42/MEMO.txt
+++ b/keyboard/hhkb_rn42/MEMO.txt
@@ -8,6 +8,7 @@ Roving RN-42
TODO
----
+- LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
- Factroy reset doesn't work; need to test again. 10K pull-up is too high?
- Lipo voltage ADC sensing
- Lipo charger configuration: fast charge time: USB charger spec?
diff --git a/keyboard/hhkb_rn42/config.h b/keyboard/hhkb_rn42/config.h
index cd8fc176de..e641a5a2bb 100644
--- a/keyboard/hhkb_rn42/config.h
+++ b/keyboard/hhkb_rn42/config.h
@@ -57,20 +57,23 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#define RTSEN 0
#define CTSEN 1
- #define SERIAL_UART_BAUD 115200
- #define SERIAL_UART_DATA UDR1
- #define SERIAL_UART_UBRR ((F_CPU/(16.0*SERIAL_UART_BAUD)-1+0.5))
- #define SERIAL_UART_RXD_VECT USART1_RX_vect
- #define SERIAL_UART_TXD_READY (UCSR1A&(1<<UDRE1))
- #define SERIAL_UART_INIT() do { \
+ #define SERIAL_UART_BAUD 115200
+ #define SERIAL_UART_DATA UDR1
+ #define SERIAL_UART_UBRR ((F_CPU/(16.0*SERIAL_UART_BAUD)-1+0.5))
+ #define SERIAL_UART_RXD_VECT USART1_RX_vect
+ #define SERIAL_UART_TXD_READY (UCSR1A&(1<<UDRE1))
+ #define SERIAL_UART_INIT() do { \
UBRR1L = (uint8_t) SERIAL_UART_UBRR; /* baud rate */ \
UBRR1H = ((uint16_t)SERIAL_UART_UBRR>>8); /* baud rate */ \
UCSR1B |= (1<<RXCIE1) | (1<<RXEN1); /* RX interrupt, RX: enable */ \
UCSR1B |= (0<<TXCIE1) | (1<<TXEN1); /* TX interrupt, TX: enable */ \
UCSR1C |= (0<<UPM11) | (0<<UPM10); /* parity: none(00), even(01), odd(11) */ \
- UCSR1D |= (0<<RTSEN) | (0<<CTSEN); /* RTS, CTS */ \
+ UCSR1D |= (0<<RTSEN) | (0<<CTSEN); /* RTS, CTS(no flow control by hardware) */ \
+ DDRD |= (1<<5); PORTD &= ~(1<<5); /* RTS for flow control by firmware */ \
sei(); \
} while(0)
+ #define SERIAL_UART_RTS_LO() do { PORTD &= ~(1<<5); } while (0)
+ #define SERIAL_UART_RTS_HI() do { PORTD |= (1<<5); } while (0)
#else
#error "USART configuration is needed."
#endif
diff --git a/keyboard/hhkb_rn42/rn42/rn42_task.c b/keyboard/hhkb_rn42/rn42/rn42_task.c
index 7ec4c1b540..2bc1c7fd04 100644
--- a/keyboard/hhkb_rn42/rn42/rn42_task.c
+++ b/keyboard/hhkb_rn42/rn42/rn42_task.c
@@ -56,9 +56,7 @@ void rn42_task(void)
// Config mode: print output from RN-42
while ((c = serial_recv2()) != -1) {
// without flow control it'll fail to receive data when flooded
- rn42_cts_hi();
xprintf("%c", c);
- rn42_cts_lo();
}
} else {
// Raw mode: interpret output report of LED state
diff --git a/protocol/serial_uart.c b/protocol/serial_uart.c
index 600340cd8e..35df27fd6e 100644
--- a/protocol/serial_uart.c
+++ b/protocol/serial_uart.c
@@ -41,6 +41,22 @@ POSSIBILITY OF SUCH DAMAGE.
#include "serial.h"
+#if defined(SERIAL_UART_RTS_LO) && defined(SERIAL_UART_RTS_HI)
+ // Buffer state
+ // Empty: RBUF_SPACE == RBUF_SIZE(head==tail)
+ // Last 1 space: RBUF_SPACE == 2
+ // Full: RBUF_SPACE == 1(last cell of rbuf be never used.)
+ #define RBUF_SPACE() (rbuf_head < rbuf_tail ? (rbuf_tail - rbuf_head) : (RBUF_SIZE - rbuf_head + rbuf_tail))
+ // allow to send
+ #define rbuf_check_rts_lo() do { if (RBUF_SPACE() > 2) SERIAL_UART_RTS_LO(); } while (0)
+ // prohibit to send
+ #define rbuf_check_rts_hi() do { if (RBUF_SPACE() <= 2) SERIAL_UART_RTS_HI(); } while (0)
+#else
+ #define rbuf_check_rts_lo()
+ #define rbuf_check_rts_hi()
+#endif
+
+
void serial_init(void)
{
SERIAL_UART_INIT();
@@ -61,6 +77,7 @@ uint8_t serial_recv(void)
data = rbuf[rbuf_tail];
rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE;
+ rbuf_check_rts_lo();
return data;
}
@@ -73,6 +90,7 @@ int16_t serial_recv2(void)
data = rbuf[rbuf_tail];
rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE;
+ rbuf_check_rts_lo();
return data;
}
@@ -90,4 +108,5 @@ ISR(SERIAL_UART_RXD_VECT)
rbuf[rbuf_head] = SERIAL_UART_DATA;
rbuf_head = next;
}
+ rbuf_check_rts_hi();
}