void main()
{
/* configures the function of the A/D port pins
* (ports A and E to digital I/Os) */
ADCON1=7;
TRISD=0x0f; /* 00001111 -> RD4:RD7 as outputs */
TRISE=3; /* 111 -> RE0:RE2 outputs */
PORTE=4;
PORTD=0;
/* set the activity LED bit as an output */
TRISC&=0xf7;
/* make sure LED is off */
LEDPORT|=0x08;
/* then flash it 3 times */
LED_flash(3);
/* initialise USART interrupts */
SerIntInit();
/* enter main program loop */
while(1)
{
/* There's a packet waiting in the buffer.. IP layer
* flag is set so we can return up the stack, rather than processing
* the packet within the interrupt routine */
if (rxstate == RXDONE)
{
/* call on the IP layer to process awaiting packet */
ip_receive();
/* serial line IDLE again */
rxstate=RXIDLE;
/* packet has been sent */
txpos=0;
}
/* Interrrupt routine has been trggered since last here,
* there is at least one byte waiting in the USART receive
* buffer - call on the SLIP layer to process and add to
* stack buffer */
if (GetRxSize()) slip_recv();
/* ensure activity LED is off */
LEDPORT|=0x08;
/* TCP counter, used for Initial Sequence Numbers */
if (tcpcounter == 2147483646) {
tcpcounter=0;
}
tcpcounter++;
}
}
int main(void)
{
serial_init(E_BAUD_38400);
serial_install_interrupts(E_FLAGS_SERIAL_RX_INTERRUPT);
serial_flush();
beeper_init(PIN);
unsigned char size = 0;
struct packet pack;
while (1) {
if (0 >= (size = slip_recv((void *)&pack, sizeof(pack)))) {
continue;
}
// ignore incomplete data chunks
if (size < 5) {
continue;
}
// verify if the information is genuine
if (!slip_verify_crc16((unsigned char *)&pack, size, 0)) {
continue;
}
for (unsigned char i = 0; i < pack.num; i++) {
play(PIN, &pack.notes[i]);
serial_poll_send(&pack.notes[i].note, 2);
serial_poll_send(&pack.notes[i].duration, 2);
}
}
return 0;
}
int main(void)
{
serial_init(E_BAUD_4800);
serial_install_interrupts(E_FLAGS_SERIAL_RX_INTERRUPT);
serial_flush();
while(1) {
char str[32] = {0x00};
memset(str, 0x00, sizeof(str));
#if TEST_TYPE == TEST_SIMPLE
#warning Building Test Simple
strcpy(buffer, "123456789");
snprintf(str, sizeof(str), "CRC: %04x\n",
checkcrc((unsigned char *)buffer, strlen(buffer)));
serial_poll_send(str, strlen(str));
#elif TEST_TYPE == TEST_RECEIVE
#warning Building Test Receive
unsigned char size = 0x00;
uint16_t crc = 0x0000;
if (0 >= (size = slip_recv((unsigned char *)buffer, 128)))
continue;
memcpy(&crc, &buffer[size - 2], 2);
memset(&buffer[size - 2], 0x00, 2);
snprintf(str, sizeof(str), "RECV [%04x], CRC: %04x\r\n",
crc,
checkcrc((unsigned char *)buffer, size));
serial_poll_send(str, strlen(str));
#elif TEST_TYPE == TEST_VERIFY
#warning Building Test Verify
unsigned char size = 0x00;
if (0 >= (size = slip_recv((unsigned char *)buffer, 128)))
continue;
snprintf(str, sizeof(str), "Verification: [%s]\r\n",
slip_verify_crc16(buffer, size, size - 2) ?
"positive" : "negative");
serial_poll_send(str, strlen(str));
#elif TEST_TYPE == TEST_SEND
#warning Building Test Send
strcpy(buffer, "123456789");
slip_append_crc16((unsigned char *)buffer, strlen(buffer));
serial_poll_send(buffer, 11);
serial_poll_send("\n",1);
#else
#error Uknown test type
#endif
_delay_ms(200);
}
return 0;
}
int main(int argc, char const *argv[]) {
g_fd = 0x00;
struct response *resp;
struct timer_data *data;
uint8_t buff[8] = {0x00};
uint16_t crc = 0x00;
if (argc <= 3) {
fprintf(stderr, "host_slip <prescaler> <ocr> <st_max>\n");
return -1;
}
if (0 > (g_fd = open(SERIAL_PORT, O_RDWR | O_NOCTTY | O_SYNC))) {
fprintf(stderr, "Unable to open device [%s]\n", SERIAL_PORT);
return 0;
}
tty_attrib_conf(g_fd, BAUD_9600, 0);
tty_block_conf(g_fd, 1);
data = (struct timer_data *)buff;
data->crc16 = 0x0000;
data->prescaler = atoi(argv[1]);
data->ocr = atoi(argv[2]);
data->st_max = atoi(argv[3]);
// insert the CRC
crc = crc16(0x00, buff, sizeof(struct timer_data));
data->crc16 = crc;
// wait for the board to reset itself
sleep(4);
printf("Sending: %d/%d/%d, CRC: 0x%04x\n",
data->prescaler,
data->ocr,
data->st_max,
data->crc16);
slip_send(buff, sizeof(struct timer_data));
slip_recv(buff, sizeof(buff));
resp = (struct response *)buff;
// zero the CRC to perform verification
buff[6] = buff[0];
buff[7] = buff[1];
buff[0] = 0x00;
buff[1] = 0x00;
// we've got the calculated CRC now
crc = crc16(0x00, buff, sizeof(struct response));
// restore the CRC
buff[0] = buff[6];
buff[1] = buff[7];
printf("CRC/CRC_CALCD/STATUS: 0x%04x/0x%04x/%s\n",
resp->crc16,
crc,
(resp->status == 0x10 ? "ACK" : "NACK"));
close(g_fd);
return 0;
}