44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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#ifndef _UART_H_
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#define _UART_H_
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#define NULL ((void*)0)
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#define CCM_UART_PORT_OFFSET 16
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#define CCM_UART_ADDR_OFFSET 0x400
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typedef struct serial_hw
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{
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volatile unsigned int rbr; /* 0 */
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volatile unsigned int ier; /* 1 */
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volatile unsigned int fcr; /* 2 */
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volatile unsigned int lcr; /* 3 */
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volatile unsigned int mcr; /* 4 */
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volatile unsigned int lsr; /* 5 */
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volatile unsigned int msr; /* 6 */
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volatile unsigned int sch; /* 7 */
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}serial_hw_t;
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#define UART_BAUD 115200 // Baud rate for UART
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// Compute the divisor factor
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// UART Line Control Parameter
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#define PARITY 0 // Parity: 0,2 - no parity; 1 - odd parity; 3 - even parity
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#define STOP 0 // Number of Stop Bit: 0 - 1bit; 1 - 2(or 1.5)bits
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#define DLEN 3 // Data Length: 0 - 5bits; 1 - 6bits; 2 - 7bits; 3 - 8bits
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#if DEBUG
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void sunxi_serial_init(int uart_port, void *gpio_cfg, int gpio_max);
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void sunxi_serial_exit(void);
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void sunxi_serial_putc (char c);
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char sunxi_serial_getc (void);
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int sunxi_serial_tstc (void);
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#else
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static inline void sunxi_serial_init(int uart_port, void *gpio_cfg, int gpio_max) {}
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static inline void sunxi_serial_exit(void) {}
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static inline void sunxi_serial_putc(char c) {}
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static inline char sunxi_serial_getc(void) { return 0;}
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static inline int sunxi_serial_tstc(void) { return 0;}
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#endif
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#endif /* #ifndef _UART_H_ */
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