Ted Lin / Mbed 2 deprecated Nucleo_key_led_with_timeout

implement button press/release with double check using fall/rise & timeout

Dependencies:   mbed

main.cpp@6:88ac8fb51ce5, 2016-08-28 (annotated)

Committer:
mintisan
Date:
Sun Aug 28 12:57:16 2016 +0000
Revision:
6:88ac8fb51ce5
Parent:
5:f89c9cfa6b38 
implement button press/release with double check using fall/rise & timeout; ;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mintisan 0:6a3454713c54 1 #include "mbed.h"
mintisan 0:6a3454713c54 2
mintisan 2:d68f26154551 3 //------------------------------------
mintisan 3:e25965edbbe7 4 // USER_KEY-PB_3 / USER_BUTTON-PC_13
mintisan 2:d68f26154551 5 //------------------------------------
mintisan 2:d68f26154551 6 InterruptIn mybutton(PB_3);
mintisan 2:d68f26154551 7 //------------------------------------
mintisan 2:d68f26154551 8 // LED1-PA5
mintisan 2:d68f26154551 9 //------------------------------------
mintisan 0:6a3454713c54 10 DigitalOut myled(PA_5);
mintisan 2:d68f26154551 11 //------------------------------------
mintisan 2:d68f26154551 12 // Hyperterminal configuration
mintisan 2:d68f26154551 13 // 9600 bauds, 8-bit data, no parity
mintisan 2:d68f26154551 14 // SERIAL_TX-PA2, SERIAL_RX-PA3
mintisan 2:d68f26154551 15 //------------------------------------
mintisan 2:d68f26154551 16 Serial pc(PA_2, PA_3);
mintisan 2:d68f26154551 17
mintisan 3:e25965edbbe7 18 Timeout flipper;
mintisan 3:e25965edbbe7 19
mintisan 4:4086e27c299e 20 #define entry() pc.printf("func:%s\n", __FUNCTION__)
mintisan 2:d68f26154551 21
mintisan 4:4086e27c299e 22 #define error() pc.printf("Error! func:%s, line: %d\n", __FUNCTION__, __LINE__)
mintisan 3:e25965edbbe7 23
mintisan 3:e25965edbbe7 24 enum{OFF=0,ON=1};
mintisan 3:e25965edbbe7 25 enum{PRESS= 0, RELEASE = 1, UNKNOWN};
mintisan 4:4086e27c299e 26 #define PRESS_JITTER_TIME 0.01 // 10ms
mintisan 4:4086e27c299e 27 #define RELEASE_JITTER_TIME 0.02 // 20ms
mintisan 6:88ac8fb51ce5 28 uint8_t cur_flag_status = UNKNOWN;
mintisan 6:88ac8fb51ce5 29 uint8_t pre_flag_status = UNKNOWN;
mintisan 6:88ac8fb51ce5 30
mintisan 6:88ac8fb51ce5 31 void update_key_status(void)
mintisan 6:88ac8fb51ce5 32 {
mintisan 6:88ac8fb51ce5 33 pre_flag_status = cur_flag_status;
mintisan 6:88ac8fb51ce5 34 cur_flag_status = mybutton.read();
mintisan 6:88ac8fb51ce5 35 }
mintisan 6:88ac8fb51ce5 36
mintisan 6:88ac8fb51ce5 37 void key_down_status(void)
mintisan 6:88ac8fb51ce5 38 {
mintisan 6:88ac8fb51ce5 39 update_key_status();
mintisan 6:88ac8fb51ce5 40 if(cur_flag_status == PRESS){
mintisan 6:88ac8fb51ce5 41 if(myled.read()!=ON){
mintisan 6:88ac8fb51ce5 42 if(pre_flag_status == PRESS){
mintisan 6:88ac8fb51ce5 43 myled = ON;
mintisan 6:88ac8fb51ce5 44 pc.printf("Pressed\n");
mintisan 6:88ac8fb51ce5 45 }
mintisan 6:88ac8fb51ce5 46 }
mintisan 6:88ac8fb51ce5 47 }
mintisan 6:88ac8fb51ce5 48 }
mintisan 6:88ac8fb51ce5 49
mintisan 6:88ac8fb51ce5 50 void key_up_status(void)
mintisan 6:88ac8fb51ce5 51 {
mintisan 6:88ac8fb51ce5 52 update_key_status();
mintisan 6:88ac8fb51ce5 53 if(cur_flag_status == RELEASE){
mintisan 6:88ac8fb51ce5 54 if(myled.read()!=OFF){
mintisan 6:88ac8fb51ce5 55 if(pre_flag_status == RELEASE){
mintisan 6:88ac8fb51ce5 56 myled = OFF;
mintisan 6:88ac8fb51ce5 57 pc.printf("Released\n");
mintisan 6:88ac8fb51ce5 58 }
mintisan 6:88ac8fb51ce5 59 }
mintisan 6:88ac8fb51ce5 60 }
mintisan 6:88ac8fb51ce5 61 }
mintisan 3:e25965edbbe7 62
mintisan 3:e25965edbbe7 63 void double_check(void)
mintisan 3:e25965edbbe7 64 {
mintisan 3:e25965edbbe7 65 //entry();
mintisan 6:88ac8fb51ce5 66 switch(cur_flag_status){
mintisan 3:e25965edbbe7 67 case PRESS:
mintisan 6:88ac8fb51ce5 68 key_down_status();
mintisan 3:e25965edbbe7 69 break;
mintisan 3:e25965edbbe7 70 case RELEASE:
mintisan 6:88ac8fb51ce5 71 key_up_status();
mintisan 3:e25965edbbe7 72 break;
mintisan 3:e25965edbbe7 73 default:
mintisan 3:e25965edbbe7 74 error();
mintisan 3:e25965edbbe7 75 break;
mintisan 3:e25965edbbe7 76 }
mintisan 3:e25965edbbe7 77 }
mintisan 3:e25965edbbe7 78
mintisan 2:d68f26154551 79 void pressed(void)
mintisan 2:d68f26154551 80 {
mintisan 3:e25965edbbe7 81 //entry();
mintisan 3:e25965edbbe7 82 if(myled.read()!=ON){
mintisan 6:88ac8fb51ce5 83 cur_flag_status = PRESS;
mintisan 4:4086e27c299e 84 // double ckeck for press status
mintisan 4:4086e27c299e 85 flipper.attach(&double_check, PRESS_JITTER_TIME);
mintisan 3:e25965edbbe7 86 }
mintisan 2:d68f26154551 87 }
mintisan 2:d68f26154551 88
mintisan 2:d68f26154551 89 void released(void)
mintisan 2:d68f26154551 90 {
mintisan 3:e25965edbbe7 91 //entry();
mintisan 3:e25965edbbe7 92 if(myled.read()!=OFF){
mintisan 6:88ac8fb51ce5 93 cur_flag_status = RELEASE;
mintisan 4:4086e27c299e 94 // double check for releasse status
mintisan 4:4086e27c299e 95 flipper.attach(&double_check, RELEASE_JITTER_TIME);
mintisan 3:e25965edbbe7 96 }
mintisan 2:d68f26154551 97 }
mintisan 0:6a3454713c54 98
mintisan 3:e25965edbbe7 99
mintisan 6:88ac8fb51ce5 100 /*
mintisan 6:88ac8fb51ce5 101 * fall edge & timout interrupt for down check;
mintisan 6:88ac8fb51ce5 102 * rise edge & timout interrupt for up check.
mintisan 6:88ac8fb51ce5 103 */
mintisan 0:6a3454713c54 104 int main(void)
mintisan 0:6a3454713c54 105 {
mintisan 5:f89c9cfa6b38 106 myled = OFF;
mintisan 2:d68f26154551 107 mybutton.fall(&pressed);
mintisan 2:d68f26154551 108 mybutton.rise(&released);
mintisan 0:6a3454713c54 109 while(1) {
mintisan 6:88ac8fb51ce5 110 // extend more task here
mintisan 0:6a3454713c54 111 }
mintisan 0:6a3454713c54 112 }