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#include "maindefs.h"
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#include "uart.h"
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#include <string.h>
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static UART_DATA uart_1_data;
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void UART1_Init() {
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// Configure the hardware USART device
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// UART1 TX RC6
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// UART1 RX RC7
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TRISCbits.TRISC6 = 0; // Tx pin set to output
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TRISCbits.TRISC7 = 1; // Rx pin set to input
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BAUDCON1bits.BRG16 = 0; // 8-bit baud rate generator
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SPBRG1 = 25; // Set UART speed to 115200 baud
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TXSTA1bits.BRGH = 1; // High speed mode
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TXSTA1bits.SYNC = 0; // Async mode
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RCSTA1bits.SPEN = 1; // Serial port enable
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TXSTA1bits.TX9 = 0; // 8 bit transmission
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RCSTA1bits.RX9 = 0; // 8 bit reception
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TXSTA1bits.TXEN = 0; // Enable transmission
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RCSTA1bits.CREN = 1; // Continuous receive mode
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PIE1bits.TX1IE = 1; // Enable TX interrupt
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PIE1bits.RC1IE = 1; // Enable RX interrupt
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// Initialize the buffer that holds UART messages
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uart_1_data.buffer_in_read_ind = 0;
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uart_1_data.buffer_in_write_ind = 0;
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uart_1_data.buffer_in_len = 0;
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}
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//void uart_2_init() {
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// // Configure the PPS USART ports
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//
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// // UART2 RX Pin RP5
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// RPINR16 = 5; // 5 is PPS RP5
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// // UART2 TX Pin RP6
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// RPOR6 = 6; // 6 is TX2/CK2 (EUSART2 Asynchronous Transmit/Asynchronous Clock Output)
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//
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// Open2USART(USART_TX_INT_OFF & // Interrupt on TX off
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// USART_RX_INT_ON & // Interrupt on RX on
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// USART_ASYNCH_MODE & // Operate in async mode
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// USART_EIGHT_BIT & // Operate in 8-bit mode
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// USART_CONT_RX & // Continuously recieve messages
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// USART_BRGH_HIGH, 25); // Set UART speed to 115200 baud
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//}
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void UART1_Recv_Interrupt_Handler() {
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unsigned char c;
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if (PIR1bits.RC1IF) { // Check if data receive flag is set
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if (uart_1_data.buffer_in_len == MAXUARTBUF-1) {
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TXSTA1bits.TXEN = 0; // Kill anything currently sending
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DBG_PRINT_UART("UART1 Buffer Overflow!\r\n");
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c = RCREG1; // Read RCREG to clear it
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} else {
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// Save received data into buffer
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uart_1_data.buffer_in[uart_1_data.buffer_in_write_ind] = RCREG1;
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if (uart_1_data.buffer_in_write_ind == MAXUARTBUF-1) {
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uart_1_data.buffer_in_write_ind = 0;
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} else {
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uart_1_data.buffer_in_write_ind++;
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}
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uart_1_data.buffer_in_len++;
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}
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}
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if (RCSTAbits.OERR == 1) {
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// We've overrun the USART and must reset
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RCSTA1bits.CREN = 0; // Reset UART1
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RCSTA1bits.CREN = 1;
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TXSTA1bits.TXEN = 0; // Kill anything currently sending
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DBG_PRINT_UART("UART1 Overrun!\r\n");
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}
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}
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//void uart_2_recv_interrupt_handler() {
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// if (DataRdy2USART()) {
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//// xbee_read_serial(Read2USART());
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// }
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//
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// if (USART2_Status.OVERRUN_ERROR == 1) {
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// // We've overrun the USART and must reset
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// RCSTA2bits.CREN = 0; // Reset UART2
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// RCSTA2bits.CREN = 1;
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// }
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//}
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void UART1_Send_Interrupt_Handler() {
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// Put remaining data in TSR for transmit
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if (uart_1_data.buffer_out_ind != uart_1_data.buffer_out_len) {
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TXREG1 = uart_1_data.buffer_out[uart_1_data.buffer_out_ind];
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uart_1_data.buffer_out_ind++;
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} else {
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while (!TXSTA1bits.TRMT); // Wait for last byte to finish sending
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TXSTA1bits.TXEN = 0; // End transmission and disable TX interrupt
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uart_1_data.buffer_out_ind = 0;
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uart_1_data.buffer_out_len = 0;
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}
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}
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void UART1_WriteS(const rom char *fmt, ...) {
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va_list args;
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while (TXSTA1bits.TXEN); // Wait for previous message to finish sending
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va_start(args, fmt);
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vsprintf((char *)uart_1_data.buffer_out, fmt, args);
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va_end(args);
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uart_1_data.buffer_out_len = strlen((char *)uart_1_data.buffer_out);
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uart_1_data.buffer_out_ind = 1;
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TXREG1 = uart_1_data.buffer_out[0]; // Put first byte in TSR
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TXSTA1bits.TXEN = 1; // Begin transmission
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}
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void UART1_WriteB(const char *msg, unsigned char length) {
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unsigned char i;
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while (TXSTA1bits.TXEN); // Wait for previous message to finish sending
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uart_1_data.buffer_out_len = length;
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uart_1_data.buffer_out_ind = 1;
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for (i = 0; i < length; i++) {
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uart_1_data.buffer_out[i] = msg[i];
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}
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TXREG1 = uart_1_data.buffer_out[0]; // Put first byte in TSR
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TXSTA1bits.TXEN = 1; // Begin transmission
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}
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/* Reader interface to the UART buffer, returns the number of bytes read */
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unsigned char UART1_Read(char *buffer) {
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unsigned char i = 0;
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while (uart_1_data.buffer_in_len != 0) {
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buffer[i] = uart_1_data.buffer_in[uart_1_data.buffer_in_read_ind];
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i++;
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if (uart_1_data.buffer_in_read_ind == MAXUARTBUF-1) {
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uart_1_data.buffer_in_read_ind = 0;
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} else {
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uart_1_data.buffer_in_read_ind++;
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}
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uart_1_data.buffer_in_len--;
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}
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return i;
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}
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