diff options
author | Daniel Friesel <derf@finalrewind.org> | 2022-01-26 22:39:37 +0100 |
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committer | Daniel Friesel <derf@finalrewind.org> | 2022-01-26 22:39:54 +0100 |
commit | 742ed60b4373bb2c81cd3b4fbc91107ab3c36fca (patch) | |
tree | e1251dae9956d242cac21c2da263b032c365ad4a /src/arch/atmega2560/driver | |
parent | 0290ca63a235b98642d54bdd3fc2ec5121b5dd69 (diff) |
atmega2560: add stdin driver
Diffstat (limited to 'src/arch/atmega2560/driver')
-rw-r--r-- | src/arch/atmega2560/driver/stdin.cc | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/arch/atmega2560/driver/stdin.cc b/src/arch/atmega2560/driver/stdin.cc new file mode 100644 index 0000000..213b29e --- /dev/null +++ b/src/arch/atmega2560/driver/stdin.cc @@ -0,0 +1,35 @@ +/* + * Copyright 2020 Daniel Friesel + * + * SPDX-License-Identifier: BSD-2-Clause + */ +#include "driver/stdin.h" +#include <avr/io.h> +#include <avr/interrupt.h> + +void StandardInput::setup() +{ + UCSR0B |= _BV(RXCIE0); +} + +bool StandardInput::hasKey() +{ + if (write_pos != read_pos) { + return true; + } + return false; +} + +char StandardInput::getKey() +{ + char ret = buffer[read_pos++]; + read_pos %= bufsize; + return ret; +} + +StandardInput kin; + +ISR(USART0_RX_vect) +{ + kin.addKey(UDR0); +} |