//General UART send function
void sendUART(unsigned char *frame_header, unsigned char *data, unsigned char length)
{
int i;
unsigned char checksum=0;
//send frame header
for(i = 0; i < FRAME_HEADER_LEN; i++)
{
checksum += frame_header[i];
while(BusyUART1());
WriteUART1(frame_header[i]);
}
//send payload data
for (i = 0; i < length; i++)
{
checksum += data[i];
while(BusyUART1());
WriteUART1(data[i]);
}
//Send Checksum Data
while(BusyUART1());
WriteUART1(0xFF - checksum);
}
//Handle an AT response packet and pass it to the sendUART function
void xbeeHandleATR(unsigned char frame_id, WordVal command, unsigned char *data, unsigned char length)
{
unsigned char frame_header[5];
frame_header[RX_API_POS] = AT_RESPONSE;
frame_header[ATR_FRAME_ID_POS] = frame_id;
frame_header[ATR_COMMAND_HB_POS] = command.byte.HB;
frame_header[ATR_COMMAND_LB_POS] = command.byte.LB;
frame_header[ATR_STATUS_POS] = 0x00;
CRITICAL_SECTION_START
//Start Byte
while(BusyUART1());
WriteUART1(RX_START);
//Length High Byte
while(BusyUART1());
WriteUART1(0x00);
//Length Low Byte
while(BusyUART1());
WriteUART1(length+FRAME_HEADER_LEN);
sendUART(frame_header, data, length);
CRITICAL_SECTION_END
}
/* Text a phone number */
void gsmText(char *number, char *msg) {
/* Store the beginning and ending sequences */
char *prefix = "AT+CMGS=\"";
char *suffix = "\"\r\n";
/* Allocate space and then store concatenated text command */
size_t len1 = strlen(prefix);
size_t len2 = strlen(number);
size_t len3 = strlen(suffix);
char *s = malloc(len1 + len2 + len3 + 1);
memcpy(s, prefix, len1);
memcpy(s + len1, number, len2);
memcpy(s + len1 + len2, suffix, len3 + 1);
/* Set GSM module to text mode */
gsmSendCommand("AT+CMGF=1\r");
/* Set the number */
gsmSendCommand(s);
/* Delay to allow GSM module to get ready */
DELAY_MS(100);
/* Set the message */
gsmSendCommand(msg);
/* Send Text */
while(BusyUART1());
WriteUART1((unsigned int)CTRL_Z);
/* Free memory */
free(s);
}
/**
* interface_test_uart: Loop n times (a long int), repeating the
* character 'U' on the UART tx pin.
*/
void interface_test_uart(long int n)
{
// Enable transmit.
U1STAbits.UTXEN = 1;
while(n--)
{
while(BusyUART1());
WriteUART1('U');
}
}
void SendLong(long num)
{
unsigned char c1, c10, c100, c1000, c10000, c100000;
if(num < 0)
{
while(BusyUART1());
WriteUART1('-');
num = -num;
}
else
{
while(BusyUART1());
WriteUART1('+');
}
c1 = num % 10;
num = num / 10;
c10 = num % 10;
num = num / 10;
c100 = num % 10;
num = num / 10;
c1000 = num % 10;
num = num / 10;
c10000 = num % 10;
num = num / 10;
c100000 = num % 10;
num = num / 10;
while(BusyUART1());
WriteUART1('0' + c100000);
while(BusyUART1());
WriteUART1('0' + c10000);
while(BusyUART1());
WriteUART1('0' + c1000);
while(BusyUART1());
WriteUART1('0' + c100);
while(BusyUART1());
WriteUART1('0' + c10);
while(BusyUART1());
WriteUART1('0' + c1);
}
// UART3 RX ISR
void __attribute__ ((interrupt,no_auto_psv)) _U3RXInterrupt(void)
{
// Clear the interrupt status of UART1 RX
U3RX_Clear_Intr_Status_Bit;
if(DataRdyUART3())
{
incoming_char = ReadUART3(); // Get the character coming from USB UART
while(BusyUART1());
WriteUART1(incoming_char); // Send the character to the GSM UART
while(BusyUART3());
WriteUART3(incoming_char); // Send the character to the USB UART
}
}
void PushUART1(byte b) {
while (U1STAbits.UTXBF); // UART1 TX Buffer Full
WriteUART1(b);
checksumAX += b;
}
