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| author | Jakob Odersky <jodersky@gmail.com> | 2014-03-30 22:38:35 +0200 |
|---|---|---|
| committer | Jakob Odersky <jodersky@gmail.com> | 2014-03-30 22:38:35 +0200 |
| commit | f93ab955074e213ad6f2bf60522cc86952d57d83 (patch) | |
| tree | 65af07c02d6f0541f31cddef9cd564189395952b /kernel/io/include | |
| parent | 2500120f64db83fc682f38a83f7f9e03ed8a5123 (diff) | |
| download | mux-f93ab955074e213ad6f2bf60522cc86952d57d83.tar.gz mux-f93ab955074e213ad6f2bf60522cc86952d57d83.tar.bz2 mux-f93ab955074e213ad6f2bf60522cc86952d57d83.zip | |
major update
Diffstat (limited to 'kernel/io/include')
| -rw-r--r-- | kernel/io/include/io/usart.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/kernel/io/include/io/usart.h b/kernel/io/include/io/usart.h new file mode 100644 index 0000000..62e2768 --- /dev/null +++ b/kernel/io/include/io/usart.h @@ -0,0 +1,31 @@ +#ifndef SERIAL_H +#define SERIAL_H + +#include "collection/rbuffer.h" +#include "collection/list.h" + +#define USARTS 1 +#define USART_BUFFER_SIZE 64 + +struct usart_device_t { + volatile char __rx_buffer[USART_BUFFER_SIZE]; + volatile char __tx_buffer[USART_BUFFER_SIZE]; + + struct rbuffer_t rx_buffer; + struct rbuffer_t tx_buffer; + + struct list_head rx_queue; + struct list_head tx_queue; +}; + +#define USART_DEVICE_INIT(name) \ + { \ + .rx_buffer = RBUFFER_ARRAY_INIT(name.__rx_buffer, USART_BUFFER_SIZE), \ + .tx_buffer = RBUFFER_ARRAY_INIT(name.__tx_buffer, USART_BUFFER_SIZE), \ + .rx_queue = LIST_HEAD_INIT(name.rx_queue), \ + .tx_queue = LIST_HEAD_INIT(name.tx_queue) \ + } + +void usart_init(unsigned long baud); + +#endif
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