82 lines
1.3 KiB
C
82 lines
1.3 KiB
C
#include "uart_hal.h"
|
|
|
|
volatile static uint8_t rx_buffer[RX_BUFFER_SIZE] = {0};
|
|
volatile static uint16_t rx_count = 0;
|
|
volatile static uint8_t uart_tx_busy = 1;
|
|
// кольцевой буффер
|
|
ISR(USART_RX_vect){
|
|
|
|
volatile static uint16_t rx_write_pos = 0;
|
|
|
|
rx_buffer[rx_write_pos] = UDR0;
|
|
rx_count++;
|
|
rx_write_pos++;
|
|
if(rx_write_pos >= RX_BUFFER_SIZE){
|
|
rx_write_pos = 0;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
ISR(USART_TX_vect){
|
|
uart_tx_busy = 1;
|
|
}
|
|
|
|
|
|
void uart_init(uint32_t baud,uint8_t high_speed){
|
|
|
|
uint8_t speed = 16;
|
|
|
|
if(high_speed != 0){
|
|
speed = 8;
|
|
UCSR0A |= 1 << U2X0;
|
|
}
|
|
|
|
baud = (F_CPU/(speed*baud)) - 1;
|
|
|
|
UBRR0H = (baud & 0x0F00) >> 8;
|
|
UBRR0L = (baud & 0x00FF);
|
|
|
|
UCSR0B |= (1 << TXEN0) | (1 << RXEN0) | (1 << TXCIE0) | (1 << RXCIE0);
|
|
|
|
}
|
|
|
|
|
|
void uart_send_byte(uint8_t c){
|
|
while(uart_tx_busy == 0);
|
|
uart_tx_busy = 0;
|
|
UDR0 = c;
|
|
}
|
|
|
|
void uart_send_array(uint8_t *c,uint16_t len){
|
|
for(uint16_t i = 0; i < len;i++){
|
|
uart_send_byte(c[i]);
|
|
}
|
|
}
|
|
|
|
void uart_send_string(uint8_t *c){
|
|
uint16_t i = 0;
|
|
do{
|
|
uart_send_byte(c[i]);
|
|
i++;
|
|
|
|
}while(c[i] != '\0');
|
|
uart_send_byte(c[i]);
|
|
}
|
|
|
|
uint16_t uart_read_count(void){
|
|
return rx_count;
|
|
}
|
|
|
|
uint8_t uart_read(void){
|
|
static uint16_t rx_read_pos = 0;
|
|
uint8_t data = 0;
|
|
|
|
data = rx_buffer[rx_read_pos];
|
|
rx_read_pos++;
|
|
rx_count--;
|
|
if(rx_read_pos >= RX_BUFFER_SIZE){
|
|
rx_read_pos = 0;
|
|
}
|
|
return data;
|
|
} |