Serial Interrupt Library with mbed RTOS for multi-threading

Dependencies:   buffered-serial1 mbed-rtos mbed

Fork of Serial_interrupts by jim hamblen

main.cpp

Committer:
tylerjw
Date:
2012-12-10
Revision:
1:2f1e54d137c7
Parent:
0:023c5cda6102
Child:
2:3d959c9fc9d7

File content as of revision 1:2f1e54d137c7:

#include "mbed.h"
#include "buffered_serial.h"
// Serial TX & RX interrupt loopback test using formatted IO - sprintf and sscanf
// Connect TX to RX (p9 to p10)
// or can also use USB and type back in the number printed out in a terminal window
// Sends out ASCII numbers in a loop and reads them back
// If not the same number LED4 goes on
// LED1 and LED2 indicate RX and TX interrupt routine activity
// LED3 changing indicate main loop running


BufferedSerial device(p13,p14);  // tx, rx
//IRQn device_irqn = UART1_IRQn;
// Can also use USB and type back in the number printed out in a terminal window
// Serial monitor_device(USBTX, USBRX);
DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);

/*
void Tx_interrupt();
void Rx_interrupt();
void send_line();
void read_line();


// Circular buffers for serial TX and RX data - used by interrupt routines
const int buffer_size = 255;
// might need to increase buffer size for high baud rates
char tx_buffer[buffer_size];
char rx_buffer[buffer_size];
// Circular buffer pointers
// volatile makes read-modify-write atomic
volatile int tx_in=0;
volatile int tx_out=0;
volatile int rx_in=0;
volatile int rx_out=0;
*/
// Line buffers for sprintf and sscanf
char tx_line[80];
char rx_line[80];

// main test program
int main()
{
    int i=0;
    int rx_i=0;
    device.baud(9600);
/*
// Setup a serial interrupt function to receive data
    device.attach(&Rx_interrupt, Serial::RxIrq);
// Setup a serial interrupt function to transmit data
    device.attach(&Tx_interrupt, Serial::TxIrq);
*/
// Formatted IO test using send and receive serial interrupts
// with sprintf and sscanf
    while (1) {
// Loop to generate different test values - send value in hex, decimal, and octal and  then read back
        for (i=0; i<0xFFFF; i++) {
            led3=1;
// Print ASCII number to tx line buffer in hex
            sprintf(tx_line,"%x\r\n",i);
// Copy tx line buffer to large tx buffer for tx interrupt routine
            device.send_line(tx_line);
// Print ASCII number to tx line buffer in decimal
            sprintf(tx_line,"%d\r\n",i);
// Copy tx line buffer to large tx buffer for tx interrupt routine
            device.send_line(tx_line);
// Print ASCII number to tx line buffer in octal
            sprintf(tx_line,"%o\r\n",i);
// Copy tx line buffer to large tx buffer for tx interrupt routine
            device.send_line(tx_line);
            led3=0;
// Read a line from the large rx buffer from rx interrupt routine
            device.read_line(rx_line);
// Read ASCII number from rx line buffer
            sscanf(rx_line,"%x",&rx_i);
// Check that numbers are the same
            if (i != rx_i) led4=1;
// Read a line from the large rx buffer from rx interrupt routine
            device.read_line(rx_line);
// Read ASCII number from rx line buffer
            sscanf(rx_line,"%d",&rx_i);
// Check that numbers are the same
            if (i != rx_i) led4=1;
// Read a line from the large rx buffer from rx interrupt routine
            device.read_line(rx_line);
// Read ASCII number from rx line buffer
            sscanf(rx_line,"%o",&rx_i);
// Check that numbers are the same
            if (i != rx_i) led4=1;
        }
    }
}