diff options
Diffstat (limited to 'src/datenklo/uart.h')
| -rw-r--r-- | src/datenklo/uart.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/datenklo/uart.h b/src/datenklo/uart.h new file mode 100644 index 0000000..2a0104a --- /dev/null +++ b/src/datenklo/uart.h @@ -0,0 +1,34 @@ + +enum uart_parity { + UART_PARITY_NONE, + UART_PARITY_EVEN, + UART_PARITY_ODD, + UART_PARITY_MARK, + UART_PARITY_SPACE, +}; + +/* uart flags */ +#define UART_PARITY_ERROR (1 << 0) +#define UART_CODE_VIOLATION (1 << 1) +#define UART_BREAK (1 << 2) + +typedef struct uart { + void *inst; + int (*tx_cb)(void *inst); + void (*rx_cb)(void *inst, int data, uint32_t flags); + uint8_t data_bits; + enum uart_parity parity; + uint8_t stop_bits; + int last_bit; + uint32_t tx_data; + uint32_t rx_data; + int tx_pos; + int rx_pos; + int length; +} uart_t; + +int uart_init(uart_t *uart, void *inst, uint8_t data_bits, enum uart_parity parity, uint8_t stop_bits, int (*tx_cb)(void *inst), void (*rx_cb)(void *inst, int data, uint32_t flags)); +int uart_tx_bit(uart_t *uart); +int uart_is_tx(uart_t *uart); +void uart_rx_bit(uart_t *uart, int bit); + |