source: software/firmware/my_serial.h @ 2

Last change on this file since 2 was 1, checked in by bouyer, 8 years ago

Initial commit of soc-conso files
File size: 690 bytes
RevLine 
[1]1
2char getchar(void);
3
4/* #define UART_BUFSIZE 16 */
5/* #define UART_BUFSIZE_MASK 0x0f */
6#define UART_BUFSIZE 128
7#define UART_BUFSIZE_MASK 0x7f
8
9extern char uart_txbuf[UART_BUFSIZE];
10extern unsigned char uart_txbuf_prod;
11extern volatile unsigned char uart_txbuf_cons;
12
13#define USART_INIT { \
14                uart_txbuf_prod = uart_txbuf_cons = 0; \
15        }
16
17#define USART_INTR {\
18        if (PIE1bits.TX1IE && PIR1bits.TX1IF) { \
19                if (uart_txbuf_prod == uart_txbuf_cons) { \
20                        PIE1bits.TX1IE = 0; /* buffer empty */ \
21                } else { \
22                        /* Place char in TXREG - this starts transmition */ \
23                        TXREG1 = uart_txbuf[uart_txbuf_cons]; \
24                        uart_txbuf_cons = (uart_txbuf_cons + 1) & UART_BUFSIZE_MASK;\
25                } \
26        } \
27    }
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