int main(void)
{
uint8_t buf[256], byte;
DDRB = _BV(DDB1) | _BV(DDB2);
usart_init(STUART_UBRR);
for(;;) {
volatile int i, j;
PORTB = _BV(PB1);
for(i = 0; (byte = usart_recieve_byte()) != '\0'; i++) {
buf[i] = byte;
PORTB = ~PORTB;
}
buf[i++] = '1';
buf[i++] = '2';
buf[i++] = '3';
buf[i++] = '\0';
for(j = 0; j < i; j++) {
usart_send_byte(buf[j]);
PORTB = ~PORTB;
}
PORTB = 0;
_delay_ms(1000);
}
return 0;
}
/**
* @brief Shell loop.
* Wait for commands in command_queue, run it, report command run status via usart tty.
*/
void shell_run()
{
char local_command[CMD_SIZE];
queue_init(&command_queue);
usart_send_str("************************************\r\n");
usart_send_str("Welcome to Neuraxis shell\r\n");
usart_send_str("************************************\r\n>");
while(1) {
if( !queue_is_empty(&command_queue) ) {
strcpy(local_command, queue_dequeue(&command_queue));
cmd_status_t status = cmd_run(local_command);
if(status == CMD_SUCCESSFUL ) {
usart_send_str("Command '");
usart_send_str(local_command);
usart_send_str("' successfully executed\r\n");
}
else
{
usart_send_str("Command '");
usart_send_str(local_command);
usart_send_str("' can't be executed\r\n");
}
usart_send_byte((uint8_t) '>');
}
else {
__WFI();
}
}
}
void send_buf()
{
uint8_t i;
for(i = 0; i < 16; ++i) {
usart_send_byte(buf[i]);
}
}
int main(void)
{
//char *msg = " There be dragons ";
char *msg = ".";
struct usart_dev *ser0 = usart_init(USART_0,
9600,
USART_BITS_8,
USART_STOPBITS_1,
USART_PARITY_NONE,
0);
struct usart_dev *ser1 = usart_init(USART_1,
19200,
USART_BITS_8,
USART_STOPBITS_1,
USART_PARITY_NONE,
0);
for (;;) {
char r[5];
usart_send_byte(ser0, '0');
usart_send_byte(ser1, '1');
/*
r[0] = *ser0->ucsra;
r[1] = *ser0->ucsrb;
r[2] = *ser0->ucsrc;
usart_send_bytes(ser0, r, 3);
r[0] = *ser1->ubrrh;
r[1] = *ser1->ubrrl;
usart_send_bytes(ser1, r, 2);
*/
if (usart_data_available(ser0)) {
char b = usart_read(ser0);
usart_send_byte(ser0, '+');
usart_send_byte(ser0, b);
}
if (usart_data_available(ser1)) {
char b = usart_read(ser1);
usart_send_byte(ser1, '-');
usart_send_byte(ser1, b);
}
_delay_ms(10);
}
}
/**
* UART2 Receive hander.
* Shell implementation. This function (handler) fill command queue by new valid command received
* from UART2.
*/
void USART2_IRQHandler()
{
static char buffer[CMD_SIZE];
static uint16_t char_number;
static uint8_t received_byte;
received_byte = USART2->DR;
USART2->DR = USART2->DR;
if( ( char_number+1 )> ( CMD_SIZE-2 ) ) {
char_number=0;
usart_send_str("Exceed command line limit (63 chars)\r\n>");
usart_send_str("\n\r>");
} else {
buffer[char_number] = received_byte;
if( (char)received_byte == '\b') {
if(char_number-1>-1)
char_number--;
else
usart_send_byte((uint8_t)'>');
} else if( (char) received_byte == '\n' ) {
buffer[char_number]='\0'; //set end of null terminated string
if (!cmd_check(buffer))
usart_send_str("\n\rUndefined command\n\r");
else {
usart_send_str("\n\rCommand enqueued\n\r");
queue_enqueue(&command_queue, buffer);
}
usart_send_str("\n\r>");
char_number=0;
} else {
char_number++;
}
}
USART_ClearITPendingBit(USART2, USART_IT_RXNE);
}
void serial_send_char(char c) {
usart_send_byte(c);
}
void usart_send_string(struct usart_dev *dev, const char *bytes)
{
char c;
while ((c = *bytes++))
usart_send_byte(dev, c);
}
void usart_send_bytes(struct usart_dev *dev, const char *bytes, uint16_t len)
{
uint16_t i;
for (i=0; i<len; i++)
usart_send_byte(dev, bytes[i]);
}
