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| author | Kevin O'Connor <kevin@koconnor.net> | 2016-06-11 16:09:33 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2016-06-14 14:00:57 -0400 |
| commit | e59951c8ae87d6a958e3ef6bee102a35281b2833 (patch) | |
| tree | 9ef616b4f63eb4e8300099824b3e2c3d981cb5ed /src/avr | |
| parent | ea5f825a916e3c1ba29ea172d94c2f7b8bcaf8dd (diff) | |
| download | kutter-e59951c8ae87d6a958e3ef6bee102a35281b2833.tar.gz kutter-e59951c8ae87d6a958e3ef6bee102a35281b2833.tar.xz kutter-e59951c8ae87d6a958e3ef6bee102a35281b2833.zip | |
avr/serial: Separate out low-level hardware manipulation to its own function
Introduce enable_tx_irq() for manipulating the AVR hardware. This
keeps the low-level hardware code together.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/avr')
| -rw-r--r-- | src/avr/serial.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/avr/serial.c b/src/avr/serial.c index 0a7a9508..c1882a5d 100644 --- a/src/avr/serial.c +++ b/src/avr/serial.c @@ -63,6 +63,13 @@ ISR(USART0_UDRE_vect) UDR0 = transmit_buf[transmit_pos++]; } +// Enable tx interrupts +static void +enable_tx_irq(void) +{ + UCSR0B |= 1<<UDRIE0; +} + /**************************************************************** * Console access functions @@ -124,7 +131,7 @@ console_get_output(uint8_t len) writeb(&transmit_pos, 0); barrier(); writeb(&transmit_max, tmax); - UCSR0B |= 1<<UDRIE0; + enable_tx_irq(); return &transmit_buf[tmax]; } @@ -133,6 +140,5 @@ void console_push_output(uint8_t len) { writeb(&transmit_max, readb(&transmit_max) + len); - // enable TX interrupt - UCSR0B |= 1<<UDRIE0; + enable_tx_irq(); } |