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Diffstat (limited to 'tmk_core/protocol/serial_uart.c')
-rw-r--r--tmk_core/protocol/serial_uart.c58
1 files changed, 28 insertions, 30 deletions
diff --git a/tmk_core/protocol/serial_uart.c b/tmk_core/protocol/serial_uart.c
index 35df27fd6..a15124193 100644
--- a/tmk_core/protocol/serial_uart.c
+++ b/tmk_core/protocol/serial_uart.c
@@ -40,73 +40,71 @@ POSSIBILITY OF SUCH DAMAGE.
#include <avr/interrupt.h>
#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)
+// 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()
+# define rbuf_check_rts_lo()
+# define rbuf_check_rts_hi()
#endif
-
-void serial_init(void)
-{
- SERIAL_UART_INIT();
-}
+void serial_init(void) { SERIAL_UART_INIT(); }
// RX ring buffer
-#define RBUF_SIZE 256
+#define RBUF_SIZE 256
static uint8_t rbuf[RBUF_SIZE];
static uint8_t rbuf_head = 0;
static uint8_t rbuf_tail = 0;
-uint8_t serial_recv(void)
-{
+uint8_t serial_recv(void) {
uint8_t data = 0;
if (rbuf_head == rbuf_tail) {
return 0;
}
- data = rbuf[rbuf_tail];
+ data = rbuf[rbuf_tail];
rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE;
rbuf_check_rts_lo();
return data;
}
-int16_t serial_recv2(void)
-{
+int16_t serial_recv2(void) {
uint8_t data = 0;
if (rbuf_head == rbuf_tail) {
return -1;
}
- data = rbuf[rbuf_tail];
+ data = rbuf[rbuf_tail];
rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE;
rbuf_check_rts_lo();
return data;
}
-void serial_send(uint8_t data)
-{
- while (!SERIAL_UART_TXD_READY) ;
+void serial_send(uint8_t data) {
+ while (!SERIAL_UART_TXD_READY)
+ ;
SERIAL_UART_DATA = data;
}
// USART RX complete interrupt
-ISR(SERIAL_UART_RXD_VECT)
-{
+ISR(SERIAL_UART_RXD_VECT) {
uint8_t next = (rbuf_head + 1) % RBUF_SIZE;
if (next != rbuf_tail) {
rbuf[rbuf_head] = SERIAL_UART_DATA;
- rbuf_head = next;
+ rbuf_head = next;
}
rbuf_check_rts_hi();
}