Mercurial > avr_jtag
diff include/avriotools.h @ 0:a0ce8ebf2f18
LED on PINB0 & PINB1 and UART testing.
- LED flasing on PINB0 & PINB1.
- print 'hello' messages to UART for every flashing round.
| author | Thinker K.F. Li <thinker@branda.to> |
|---|---|
| date | Sat, 21 Feb 2009 15:49:59 +0800 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/include/avriotools.h Sat Feb 21 15:49:59 2009 +0800 @@ -0,0 +1,65 @@ +#ifndef __AVRIOTOOLS_H_ +#define __AVRIOTOOLS_H_ +#include <stdint.h> +#include <avr/io.h> + +typedef enum {PM_INPUT, PM_OUTPUT} pin_mode_t; + +extern int pin_mode(volatile uint8_t * port, int pin, pin_mode_t mode); +#define pin_hi(port, pin) do { port |= _BV(pin); } while(0) +#define pin_lo(port, pin) do { port &= ~_BV(pin); } while(0) + + +#define UBRRH UBRR0L +#define UBRRL UBRR0L +#define UCSRA UCSR0A +#define U2X U2X0 +#define UDRE UDRE0 +#define UDR UDR0 +#define RXC RXC0 +#define FE FE0 +#define DOR DOR0 + +extern int uart_init(uint32_t baud); +#define uart_getc(c) \ + do { \ + loop_until_bit_is_set(UCSRA, RXC); \ + if (UCSRA & _BV(FE)) \ + continue; \ + if (UCSRA & _BV(DOR)) \ + continue; \ + c = UDR; \ + } while(0) +/* + * c == -1 if not data been read. + * \note c must be an integer. + */ +#define uart_getc_nowait(c) \ + do { \ + c = -1; \ + if(bit_is_clear(UCSRA, RXC)) break; \ + if (UCSRA & _BV(FE)) \ + break; \ + if (UCSRA & _BV(DOR)) \ + break; \ + c = UDR; \ + } while(0) +#define uart_putc(c) \ + do { \ + loop_until_bit_is_set(UCSRA, UDRE); \ + UDR = ((uint8_t)(c & 0xff)); \ + } while(0) +/* + * c == -1 if it been wrote out. + * \note c must be an integer. + */ +#define uart_putc_nowait(c) \ + do { \ + if(bit_is_clear(UCSRA, UDRE)) \ + break; \ + UDR = ((uint8_t)(c & 0xff)); \ + c = -1; \ + } while(0) + + +#endif /* __AVRIOTOOLS_H_ */