Enrico Marinoni / Mbed 2 deprecated NUCLEOL152RE_U2andU1_Inter

How to use USART1 and USART2 under Interrupt

Dependencies:   mbed

main.cpp@0:a6494748f42e, 2014-06-29 (annotated)

Committer:
emcu
Date:
Sun Jun 29 10:07:37 2014 +0000
Revision:
0:a6494748f42e
NUCLEO-L152RE How to use USART1 and USART2 under Interrupt

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emcu 0:a6494748f42e 1 //
emcu 0:a6494748f42e 2 // U2andU1_Inter
emcu 0:a6494748f42e 3 //
emcu 0:a6494748f42e 4 // From: www.emcu.it
emcu 0:a6494748f42e 5 // Date: 29-06-2014
emcu 0:a6494748f42e 6 // Tested on NUCLEO_L152RE
emcu 0:a6494748f42e 7 // for more info see here: http://www.emcu.it/NUCLEOevaBoards/NUCLEOevaBoards.html#Tutorial
emcu 0:a6494748f42e 8 //
emcu 0:a6494748f42e 9 /*
emcu 0:a6494748f42e 10 * Permission is hereby granted, free of charge, to any person obtaining a copy
emcu 0:a6494748f42e 11 * of this software and associated documentation files (the "Software"), to deal
emcu 0:a6494748f42e 12 * in the Software without restriction, including without limitation the rights
emcu 0:a6494748f42e 13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emcu 0:a6494748f42e 14 * copies of the Software, and to permit persons to whom the Software is
emcu 0:a6494748f42e 15 * furnished to do so, subject to the following conditions:
emcu 0:a6494748f42e 16 *
emcu 0:a6494748f42e 17 * The above copyright notice and this permission notice shall be included in
emcu 0:a6494748f42e 18 * all copies or substantial portions of the Software.
emcu 0:a6494748f42e 19 *
emcu 0:a6494748f42e 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emcu 0:a6494748f42e 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emcu 0:a6494748f42e 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emcu 0:a6494748f42e 23 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emcu 0:a6494748f42e 24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emcu 0:a6494748f42e 25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
emcu 0:a6494748f42e 26 * THE SOFTWARE.
emcu 0:a6494748f42e 27
emcu 0:a6494748f42e 28
emcu 0:a6494748f42e 29 ++++++++++++++++++++++ CONFIGURATIONS +++++++++++++++++++++++++++++++
emcu 0:a6494748f42e 30
emcu 0:a6494748f42e 31 USART2 it is used for debug (connected to the PC) using TeraTerm
emcu 0:a6494748f42e 32 USART1 it is used for show the way to use another USART
emcu 0:a6494748f42e 33 Both USART are not used under Interrupt
emcu 0:a6494748f42e 34
emcu 0:a6494748f42e 35 The USART parameters are:
emcu 0:a6494748f42e 36 Baud Rate: 115200
emcu 0:a6494748f42e 37 Data: 8
emcu 0:a6494748f42e 38 Parity: NONE
emcu 0:a6494748f42e 39 Stop: 1
emcu 0:a6494748f42e 40 Flow Control: NONE
emcu 0:a6494748f42e 41
emcu 0:a6494748f42e 42
emcu 0:a6494748f42e 43 ++++++++++++++++++++++ How to use this example ++++++++++++++++++++++
emcu 0:a6494748f42e 44
emcu 0:a6494748f42e 45 For test this example connect with a jumper D2 (SERIAL1_RX) to D10 (SERIAL1_TX).
emcu 0:a6494748f42e 46
emcu 0:a6494748f42e 47 Press and release the Blue Button and you must see the green LED ON for 1 second.
emcu 0:a6494748f42e 48 At the same time some message are displayed via USB Virtual COM on your PC.
emcu 0:a6494748f42e 49
emcu 0:a6494748f42e 50 Similar, if you press E on your Tera Term (PC) you must see the green LED ON for 1 second.
emcu 0:a6494748f42e 51
emcu 0:a6494748f42e 52
emcu 0:a6494748f42e 53 */
emcu 0:a6494748f42e 54
emcu 0:a6494748f42e 55 #include "mbed.h"
emcu 0:a6494748f42e 56
emcu 0:a6494748f42e 57 Serial pc(SERIAL_TX, SERIAL_RX); // This is USART2 tx, rx
emcu 0:a6494748f42e 58 // It is used for Debug via VirtualCOM
emcu 0:a6494748f42e 59 // I suggest to use Tera TERM on PC
emcu 0:a6494748f42e 60 Serial Serial1(PB_6, PA_10); // This is USART1 tx, rx
emcu 0:a6494748f42e 61 DigitalOut myled(LED1); // This LED is on NUCLEO-L152RE
emcu 0:a6494748f42e 62 DigitalIn BlueButton(USER_BUTTON); // This is Blue-Button and is on NUCLEO-L153RE
emcu 0:a6494748f42e 63
emcu 0:a6494748f42e 64 #define Pressed 0
emcu 0:a6494748f42e 65 #define NotPressed 1
emcu 0:a6494748f42e 66
emcu 0:a6494748f42e 67 int Car='\0';
emcu 0:a6494748f42e 68 int CarSerial1='\0';
emcu 0:a6494748f42e 69 int n=0;
emcu 0:a6494748f42e 70
emcu 0:a6494748f42e 71 void callback2() // USART2 used for Debug
emcu 0:a6494748f42e 72 {
emcu 0:a6494748f42e 73 // Note: you need to actually read from the serial to clear the RX interrupt
emcu 0:a6494748f42e 74 Car = pc.getc();
emcu 0:a6494748f42e 75 }
emcu 0:a6494748f42e 76
emcu 0:a6494748f42e 77 void USART1_INT() // USART1
emcu 0:a6494748f42e 78 {
emcu 0:a6494748f42e 79 // Note: you need to actually read from the serial to clear the RX interrupt
emcu 0:a6494748f42e 80 CarSerial1 = Serial1.getc();
emcu 0:a6494748f42e 81 }
emcu 0:a6494748f42e 82
emcu 0:a6494748f42e 83
emcu 0:a6494748f42e 84 int main() {
emcu 0:a6494748f42e 85 myled = 0;
emcu 0:a6494748f42e 86
emcu 0:a6494748f42e 87 // SetUp the baud rate
emcu 0:a6494748f42e 88 pc.baud(115200);
emcu 0:a6494748f42e 89 Serial1.baud(115200);
emcu 0:a6494748f42e 90
emcu 0:a6494748f42e 91 Serial1.attach(&USART1_INT);
emcu 0:a6494748f42e 92 pc.attach(&callback2);
emcu 0:a6494748f42e 93
emcu 0:a6494748f42e 94 pc.printf("\n\r\n\r START MAIN \n\r");
emcu 0:a6494748f42e 95
emcu 0:a6494748f42e 96 while(1)
emcu 0:a6494748f42e 97 {
emcu 0:a6494748f42e 98
emcu 0:a6494748f42e 99 // Test the Blue Button
emcu 0:a6494748f42e 100 if (BlueButton == Pressed)
emcu 0:a6494748f42e 101 {
emcu 0:a6494748f42e 102 while(BlueButton == Pressed)
emcu 0:a6494748f42e 103 {
emcu 0:a6494748f42e 104 if (n == 0)
emcu 0:a6494748f42e 105 pc.printf("Please release the BLUE Button\n\r");
emcu 0:a6494748f42e 106 n++;
emcu 0:a6494748f42e 107 }
emcu 0:a6494748f42e 108 n = 0;
emcu 0:a6494748f42e 109 pc.printf("Send char. E to USART1\n\r");
emcu 0:a6494748f42e 110 Serial1.putc('E'); // Send char. E to USART1
emcu 0:a6494748f42e 111 }
emcu 0:a6494748f42e 112
emcu 0:a6494748f42e 113 // Test the char. received from USART2 that is USB Virtual COM
emcu 0:a6494748f42e 114 if (Car == 'E')
emcu 0:a6494748f42e 115 {
emcu 0:a6494748f42e 116 {
emcu 0:a6494748f42e 117 pc.printf("Send char. E (received from USB_VirtualCOM USART2) to USART1\n\r");
emcu 0:a6494748f42e 118 Serial1.putc('E'); // Send char. E to USART1
emcu 0:a6494748f42e 119 }
emcu 0:a6494748f42e 120 Car = '\0';
emcu 0:a6494748f42e 121 }
emcu 0:a6494748f42e 122
emcu 0:a6494748f42e 123 // Test the char. received from USART1
emcu 0:a6494748f42e 124 if (CarSerial1 == 'E')
emcu 0:a6494748f42e 125 {
emcu 0:a6494748f42e 126 {
emcu 0:a6494748f42e 127 pc.printf("RX char. E from USART1\n\r");
emcu 0:a6494748f42e 128 myled = 1;
emcu 0:a6494748f42e 129 wait(1);
emcu 0:a6494748f42e 130 }
emcu 0:a6494748f42e 131 myled = 0;
emcu 0:a6494748f42e 132 CarSerial1 = '\0';
emcu 0:a6494748f42e 133 }
emcu 0:a6494748f42e 134
emcu 0:a6494748f42e 135 }
emcu 0:a6494748f42e 136 }