Tyler Weaver / Mbed 2 deprecated Serial_interrupts_buffered

Serial Interrupt Library with mbed RTOS for multi-threading

Dependencies:   buffered-serial1 mbed-rtos mbed

Fork of Serial_interrupts by jim hamblen

main.cpp@1:2f1e54d137c7, 2012-12-10 (annotated)

Committer:
tylerjw
Date:
Mon Dec 10 00:32:22 2012 +0000
Revision:
1:2f1e54d137c7
Parent:
0:023c5cda6102
Child:
2:3d959c9fc9d7
library based buffered serial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
4180_1 0:023c5cda6102 1 #include "mbed.h"
tylerjw 1:2f1e54d137c7 2 #include "buffered_serial.h"
4180_1 0:023c5cda6102 3 // Serial TX & RX interrupt loopback test using formatted IO - sprintf and sscanf
4180_1 0:023c5cda6102 4 // Connect TX to RX (p9 to p10)
4180_1 0:023c5cda6102 5 // or can also use USB and type back in the number printed out in a terminal window
4180_1 0:023c5cda6102 6 // Sends out ASCII numbers in a loop and reads them back
4180_1 0:023c5cda6102 7 // If not the same number LED4 goes on
4180_1 0:023c5cda6102 8 // LED1 and LED2 indicate RX and TX interrupt routine activity
4180_1 0:023c5cda6102 9 // LED3 changing indicate main loop running
4180_1 0:023c5cda6102 10
4180_1 0:023c5cda6102 11
tylerjw 1:2f1e54d137c7 12 BufferedSerial device(p13,p14); // tx, rx
tylerjw 1:2f1e54d137c7 13 //IRQn device_irqn = UART1_IRQn;
4180_1 0:023c5cda6102 14 // Can also use USB and type back in the number printed out in a terminal window
4180_1 0:023c5cda6102 15 // Serial monitor_device(USBTX, USBRX);
4180_1 0:023c5cda6102 16 DigitalOut led1(LED1);
4180_1 0:023c5cda6102 17 DigitalOut led2(LED2);
4180_1 0:023c5cda6102 18 DigitalOut led3(LED3);
4180_1 0:023c5cda6102 19 DigitalOut led4(LED4);
4180_1 0:023c5cda6102 20
tylerjw 1:2f1e54d137c7 21 /*
4180_1 0:023c5cda6102 22 void Tx_interrupt();
4180_1 0:023c5cda6102 23 void Rx_interrupt();
4180_1 0:023c5cda6102 24 void send_line();
4180_1 0:023c5cda6102 25 void read_line();
4180_1 0:023c5cda6102 26
4180_1 0:023c5cda6102 27
4180_1 0:023c5cda6102 28 // Circular buffers for serial TX and RX data - used by interrupt routines
4180_1 0:023c5cda6102 29 const int buffer_size = 255;
4180_1 0:023c5cda6102 30 // might need to increase buffer size for high baud rates
4180_1 0:023c5cda6102 31 char tx_buffer[buffer_size];
4180_1 0:023c5cda6102 32 char rx_buffer[buffer_size];
4180_1 0:023c5cda6102 33 // Circular buffer pointers
4180_1 0:023c5cda6102 34 // volatile makes read-modify-write atomic
4180_1 0:023c5cda6102 35 volatile int tx_in=0;
4180_1 0:023c5cda6102 36 volatile int tx_out=0;
4180_1 0:023c5cda6102 37 volatile int rx_in=0;
4180_1 0:023c5cda6102 38 volatile int rx_out=0;
tylerjw 1:2f1e54d137c7 39 */
4180_1 0:023c5cda6102 40 // Line buffers for sprintf and sscanf
4180_1 0:023c5cda6102 41 char tx_line[80];
4180_1 0:023c5cda6102 42 char rx_line[80];
4180_1 0:023c5cda6102 43
4180_1 0:023c5cda6102 44 // main test program
tylerjw 1:2f1e54d137c7 45 int main()
tylerjw 1:2f1e54d137c7 46 {
4180_1 0:023c5cda6102 47 int i=0;
4180_1 0:023c5cda6102 48 int rx_i=0;
4180_1 0:023c5cda6102 49 device.baud(9600);
tylerjw 1:2f1e54d137c7 50 /*
4180_1 0:023c5cda6102 51 // Setup a serial interrupt function to receive data
4180_1 0:023c5cda6102 52 device.attach(&Rx_interrupt, Serial::RxIrq);
4180_1 0:023c5cda6102 53 // Setup a serial interrupt function to transmit data
4180_1 0:023c5cda6102 54 device.attach(&Tx_interrupt, Serial::TxIrq);
tylerjw 1:2f1e54d137c7 55 */
4180_1 0:023c5cda6102 56 // Formatted IO test using send and receive serial interrupts
4180_1 0:023c5cda6102 57 // with sprintf and sscanf
4180_1 0:023c5cda6102 58 while (1) {
4180_1 0:023c5cda6102 59 // Loop to generate different test values - send value in hex, decimal, and octal and then read back
4180_1 0:023c5cda6102 60 for (i=0; i<0xFFFF; i++) {
4180_1 0:023c5cda6102 61 led3=1;
4180_1 0:023c5cda6102 62 // Print ASCII number to tx line buffer in hex
4180_1 0:023c5cda6102 63 sprintf(tx_line,"%x\r\n",i);
4180_1 0:023c5cda6102 64 // Copy tx line buffer to large tx buffer for tx interrupt routine
tylerjw 1:2f1e54d137c7 65 device.send_line(tx_line);
4180_1 0:023c5cda6102 66 // Print ASCII number to tx line buffer in decimal
4180_1 0:023c5cda6102 67 sprintf(tx_line,"%d\r\n",i);
4180_1 0:023c5cda6102 68 // Copy tx line buffer to large tx buffer for tx interrupt routine
tylerjw 1:2f1e54d137c7 69 device.send_line(tx_line);
4180_1 0:023c5cda6102 70 // Print ASCII number to tx line buffer in octal
4180_1 0:023c5cda6102 71 sprintf(tx_line,"%o\r\n",i);
4180_1 0:023c5cda6102 72 // Copy tx line buffer to large tx buffer for tx interrupt routine
tylerjw 1:2f1e54d137c7 73 device.send_line(tx_line);
4180_1 0:023c5cda6102 74 led3=0;
4180_1 0:023c5cda6102 75 // Read a line from the large rx buffer from rx interrupt routine
tylerjw 1:2f1e54d137c7 76 device.read_line(rx_line);
4180_1 0:023c5cda6102 77 // Read ASCII number from rx line buffer
4180_1 0:023c5cda6102 78 sscanf(rx_line,"%x",&rx_i);
4180_1 0:023c5cda6102 79 // Check that numbers are the same
4180_1 0:023c5cda6102 80 if (i != rx_i) led4=1;
4180_1 0:023c5cda6102 81 // Read a line from the large rx buffer from rx interrupt routine
tylerjw 1:2f1e54d137c7 82 device.read_line(rx_line);
4180_1 0:023c5cda6102 83 // Read ASCII number from rx line buffer
4180_1 0:023c5cda6102 84 sscanf(rx_line,"%d",&rx_i);
4180_1 0:023c5cda6102 85 // Check that numbers are the same
4180_1 0:023c5cda6102 86 if (i != rx_i) led4=1;
4180_1 0:023c5cda6102 87 // Read a line from the large rx buffer from rx interrupt routine
tylerjw 1:2f1e54d137c7 88 device.read_line(rx_line);
4180_1 0:023c5cda6102 89 // Read ASCII number from rx line buffer
4180_1 0:023c5cda6102 90 sscanf(rx_line,"%o",&rx_i);
4180_1 0:023c5cda6102 91 // Check that numbers are the same
4180_1 0:023c5cda6102 92 if (i != rx_i) led4=1;
4180_1 0:023c5cda6102 93 }
4180_1 0:023c5cda6102 94 }
4180_1 0:023c5cda6102 95 }
4180_1 0:023c5cda6102 96