USART

Simple usart using pooling method, with basic functions used for debug purpose.

Summary

Members

define USART_BAUD

define MYUBRR

define USART_HAS_DATA

define USART_READY

public inline void usart_send_char(char data)

sends a char through serial

Parameters

• data will be sent trough serial

public inline char usart_receive_char(void)

gets data from serial. But BEWARE - it freezes until receive something

public inline void usart_send_string(const char * s)

sends a char array roght serial. The strings are limited in 255 chars and MUST terminate with ‘\0’.

public inline void usart_send_int8(int8_t num)

public inline void usart_send_uint8(uint8_t num)

sends a number in ascii trough serial. The number could be represent with left-filled with a defined FILL char in a defined BASE. Note that the LEN is 6 because 2^16 have its maximum ascii size represented with 5 chars + ‘\0’ in the end.

public inline void usart_send_int16(int16_t num)

public inline void usart_send_uint16(uint16_t num)

sends a number in ascii trough serial. The number could be represent with left-filled with a defined FILL char in a defined BASE. Note that the LEN is 6 because 2^16 have its maximum ascii size represented with 5 chars + ‘\0’ in the end.

public inline void usart_send_int32(int32_t num)

public inline void usart_send_uint32(uint32_t num)

sends a number in ascii trough serial. The number could be represent with left-filled with a defined FILL char in a defined BASE. Note that the LEN is 11 because 2^32 have its maximum ascii size represented with 10 chars + ‘\0’ in the end.

public inline void usart_send_buffer(uint8_t * b,uint8_t lenght)

sends a buffer through serial. Max lenght is 255.

public inline void usart_init(uint16_t ubrr,uint8_t rx,uint8_t tx)

starts the usart.

Parameters

• ubrr is the baudrate

• rx enables the receive

• tx enables the transmit it is recommended to use the following defines:

  #define USART_BAUD 9600
  #define MYUBRR F_CPU/16/USART_BAUD-1
  usart_init(MYUBRR,1,1);
  

public inline void usart_send_float(float num)

sends a float number in ascii trough serial.