From f93ab955074e213ad6f2bf60522cc86952d57d83 Mon Sep 17 00:00:00 2001 From: Jakob Odersky Date: Sun, 30 Mar 2014 22:38:35 +0200 Subject: major update --- kernel/io/include/io/usart.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 kernel/io/include/io/usart.h (limited to 'kernel/io/include/io') 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 \ No newline at end of file -- cgit v1.2.3