diff options
Diffstat (limited to 'src/usart.c')
| -rw-r--r-- | src/usart.c | 163 |
1 files changed, 89 insertions, 74 deletions
diff --git a/src/usart.c b/src/usart.c index 745d75c..dca5878 100644 --- a/src/usart.c +++ b/src/usart.c @@ -2,83 +2,98 @@ #ifdef MCUSUPPORT_USART -volatile int8_t _usart_busy; +#define USART_PARITY_NONE 0 +#define USART_PARITY_ODD 1 +#define USART_PARITY_EVEN 2 + +#define USART_STOPBIT_SINGLE 1 +#define USART_STOPBIT_DOUBLE 2 + +#ifndef CONFIG_IOE_USART_BAUD +#warning "CONFIG_IOE_USART_BAUNDRATE not defined. Setting default 9600." +#define CONFIG_IOE_USART_BAUD 9600 +#endif +#ifndef CONFIG_IOE_USART_PARITY +#warning "CONFIG_IOE_USART_PARITY not defined. Using default USART_PARITY_NONE." +#define CONFIG_IOE_USART_PARITY USART_PARITY_NONE +#endif +#ifndef CONFIG_IOE_USART_STOPBIT +#warning "CONFIG_IOE_USART_STOPBIT not defined. Using default USART_STOPBIT_SINGLE." +#define CONFIG_IOE_USART_STOPBIT USART_STOPBIT_SINGLE +#endif +#ifndef CONFIG_IOE_USART_DATABITS +#warning "CONFIG_IOE_USART_DATABITS not defined. Using default 8." +#define CONFIG_IOE_USART_DATABITS 8 +#endif + +#if !((CONFIG_IOE_USART_PARITY == USART_PARITY_NONE) || \ + (CONFIG_IOE_USART_PARITY == USART_PARITY_ODD) || \ + (CONFIG_IOE_USART_PARITY == USART_PARITY_EVEN)) +#error "CONFIG_IOE_USART_PARITY has value, that is not allowed." +#endif + +#if !((CONFIG_IOE_USART_STOPBIT == USART_STOPBIT_SINGLE) || \ + (CONFIG_IOE_USART_STOPBIT == USART_STOPBIT_DOUBLE)) +#error "CONFIG_IOE_USART_STOPBIT has value, that is not allowed." +#endif + +#if !((CONFIG_IOE_USART_DATABITS == 5) || \ + (CONFIG_IOE_USART_DATABITS == 6) || \ + (CONFIG_IOE_USART_DATABITS == 7) || \ + (CONFIG_IOE_USART_DATABITS == 8)) +// TODO DATABITS 9 is not supported +#error "CONFIG_IOE_USART_DATABITS has value, that is not allowed." +#endif + +#if (defined CONFIG_IOE_USART_INFILE) && (CONFIG_IOE_USART_INBUFFER_SIZE <= 0) +#error "USART Input file can't be enabled without input buffer" +#endif +#if (defined CONFIG_IOE_USART_OUTFILE) && (CONFIG_IOE_USART_OUTBUFFER_SIZE <= 0) +#error "USART Input file can't be enabled without output buffer" +#endif -inline void usart_init_uart(void) { - usart_init_async(USART_BAUDRATE_115200, USART_PARITY_NONE, - USART_STOPBIT_SINGLE, USART_DATABITS_8); -} -void usart_init_async(enum usartBaudrate baudrate, - enum usartParity parity, enum usartStopBit stopbit, - enum usartDataBits databits) { +volatile int8_t _usart_busy; + +void usart_init_async(void) { _usart_busy = 0; - switch (baudrate) { - case USART_BAUDRATE_2400: -#define BAUD 2400 -#include "usart_baundrate_helper.h" - break; - case USART_BAUDRATE_4800: -#define BAUD 4800 -#include "usart_baundrate_helper.h" - break; - case USART_BAUDRATE_9600: -#define BAUD 9600 -#include "usart_baundrate_helper.h" - break; - case USART_BAUDRATE_19200: -#define BAUD 19200 -#include "usart_baundrate_helper.h" - break; - case USART_BAUDRATE_38400: -#define BAUD 38400 -#include "usart_baundrate_helper.h" - break; - case USART_BAUDRATE_57600: -#define BAUD 57600 -#include "usart_baundrate_helper.h" - break; - case USART_BAUDRATE_115200: -#define BAUD 115200 -#include "usart_baundrate_helper.h" - break; - } - switch (parity) { - case USART_PARITY_NONE: - UCSR0C &= ~(_BV(UPM00) | _BV(UPM01)); - break; - case USART_PARITY_ODD: - UCSR0C &= ~_BV(UPM00); - UCSR0C |= _BV(UPM01); - break; - case USART_PARITY_EVEN: - UCSR0C |= _BV(UPM00) | _BV(UPM01); - break; - } - switch (stopbit) { - case USART_STOPBIT_SINGLE: - UCSR0C &= ~_BV(USBS0); - break; - case USART_STOPBIT_DOUBLE: - UCSR0C |= _BV(USBS0); - break; - } - switch (databits) { - case USART_DATABITS_5: - UCSR0C &= ~(_BV(UCSZ00) | _BV(UCSZ01)); - break; - case USART_DATABITS_6: - UCSR0C &= ~_BV(UCSZ01); - UCSR0C |= _BV(UCSZ00); - break; - case USART_DATABITS_7: - UCSR0C &= ~_BV(UCSZ00); - UCSR0C |= _BV(UCSZ01); - break; - case USART_DATABITS_8: - UCSR0C |= _BV(UCSZ00) | _BV(UCSZ01); - break; - } +#define BAUD CONFIG_IOE_USART_BAUD +#include <util/setbaud.h> + UBRR0H = UBRRH_VALUE; + UBRR0L = UBRRL_VALUE; +#if USE_2X + UCSR0A |= _BV(U2X0); +#else + UCSR0A &= ~_BV(U2X0); +#endif + +#if CONFIG_IOE_USART_PARITY == USART_PARITY_NONE + UCSR0C &= ~(_BV(UPM00) | _BV(UPM01)); +#elif CONFIG_IOE_USART_PARITY == USART_PARITY_ODD + UCSR0C &= ~_BV(UPM00); + UCSR0C |= _BV(UPM01); +#else // USART_PARITY_EVEN + UCSR0C |= _BV(UPM00) | _BV(UPM01); +#endif + +#if CONFIG_IOE_USART_STOPBIT == USART_STOPBIT_SINGLE + UCSR0C &= ~_BV(USBS0); +#else + UCSR0C |= _BV(USBS0); +#endif + +#if CONFIG_IOE_USART_DATABITS == 5 + UCSR0C &= ~(_BV(UCSZ00) | _BV(UCSZ01)); +#elif CONFIG_IOE_USART_DATABITS == 6 + UCSR0C &= ~_BV(UCSZ01); + UCSR0C |= _BV(UCSZ00); +#elif CONFIG_IOE_USART_DATABITS == 7 + UCSR0C &= ~_BV(UCSZ00); + UCSR0C |= _BV(UCSZ01); +#elif CONFIG_IOE_USART_DATABITS == 8 + UCSR0C |= _BV(UCSZ00) | _BV(UCSZ01); +#endif + // Enable receiver, transmitter and RX complete, // Data register empty interrupts UCSR0B = _BV(RXEN0) | _BV(TXEN0) | _BV(RXCIE0) | _BV(UDRIE0); |