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Filtering works for emg
Dependencies: HIDScope MODSERIAL mbed
Fork of EMG by
main.cpp@13:18d4cef1fdb4, 2014-09-23 (annotated)
- Committer:
- vsluiter
- Date:
- Tue Sep 23 18:56:14 2014 +0000
- Revision:
- 13:18d4cef1fdb4
- Parent:
- 11:ce72ec658a95
- Child:
- 14:f83354387756
Changed comment to correct values...
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
vsluiter | 0:32bb76391d89 | 1 | #include "mbed.h" |
vsluiter | 6:80c13d99aa55 | 2 | #include "MODSERIAL.h" |
vsluiter | 11:ce72ec658a95 | 3 | #include "HIDScope.h" |
vsluiter | 0:32bb76391d89 | 4 | |
vsluiter | 4:8b298dfada81 | 5 | //Define objects |
vsluiter | 7:3396c3e33928 | 6 | AnalogIn emg0(PTB1); //Analog input |
ArvidKeemink | 1:db54d9412d18 | 7 | PwmOut red(LED_RED); //PWM output |
vsluiter | 8:8a17f65622b4 | 8 | Ticker log_timer; |
vsluiter | 8:8a17f65622b4 | 9 | MODSERIAL pc(USBTX,USBRX); |
vsluiter | 11:ce72ec658a95 | 10 | HIDScope scope(2); |
vsluiter | 2:e314bb3b2d99 | 11 | |
vsluiter | 4:8b298dfada81 | 12 | /** Looper function |
vsluiter | 4:8b298dfada81 | 13 | * functions used for Ticker and Timeout should be of type void <name>(void) |
vsluiter | 4:8b298dfada81 | 14 | * i.e. no input arguments, no output arguments. |
vsluiter | 4:8b298dfada81 | 15 | * if you want to change a variable that you use in other places (for example in main) |
vsluiter | 4:8b298dfada81 | 16 | * you will have to make that variable global in order to be able to reach it both from |
vsluiter | 4:8b298dfada81 | 17 | * the function called at interrupt time, and in the main function. |
vsluiter | 4:8b298dfada81 | 18 | * To make a variable global, define it under the includes. |
vsluiter | 4:8b298dfada81 | 19 | * variables that are changed in the interrupt routine (written to) should be made |
vsluiter | 4:8b298dfada81 | 20 | * 'volatile' to let the compiler know that those values may change outside the current context. |
vsluiter | 8:8a17f65622b4 | 21 | * i.e.: "volatile uint16_t emg_value;" instead of "uint16_t emg_value" |
vsluiter | 4:8b298dfada81 | 22 | * in the example below, the variable is not re-used in the main function, and is thus declared |
vsluiter | 4:8b298dfada81 | 23 | * local in the looper function only. |
vsluiter | 4:8b298dfada81 | 24 | **/ |
vsluiter | 2:e314bb3b2d99 | 25 | void looper() |
vsluiter | 2:e314bb3b2d99 | 26 | { |
vsluiter | 4:8b298dfada81 | 27 | /*variable to store value in*/ |
vsluiter | 8:8a17f65622b4 | 28 | uint16_t emg_value; |
vsluiter | 4:8b298dfada81 | 29 | /*put raw emg value both in red and in emg_value*/ |
vsluiter | 10:09b8424a7b39 | 30 | red.write(emg0.read()); // read float value (0..1 = 0..3.3V) |
vsluiter | 8:8a17f65622b4 | 31 | emg_value = emg0.read_u16(); // read direct ADC result (0..4096 = 0..3.3V) |
vsluiter | 8:8a17f65622b4 | 32 | /*send value to PC. Line below is used to prevent buffer overrun */ |
vsluiter | 6:80c13d99aa55 | 33 | if(pc.rxBufferGetSize(0)-pc.rxBufferGetCount() > 30) |
vsluiter | 8:8a17f65622b4 | 34 | pc.printf("%u\n",emg_value); |
vsluiter | 11:ce72ec658a95 | 35 | scope.set(0,emg_value); |
vsluiter | 11:ce72ec658a95 | 36 | scope.set(1,red.read()); |
vsluiter | 11:ce72ec658a95 | 37 | scope.send(); |
vsluiter | 5:4dacb7b72109 | 38 | /**When not using the LED, the above could also have been done this way: |
vsluiter | 8:8a17f65622b4 | 39 | * pc.printf("%u\n", emg0.read_u16()); |
vsluiter | 5:4dacb7b72109 | 40 | */ |
vsluiter | 2:e314bb3b2d99 | 41 | } |
vsluiter | 0:32bb76391d89 | 42 | |
vsluiter | 0:32bb76391d89 | 43 | int main() |
vsluiter | 0:32bb76391d89 | 44 | { |
vsluiter | 4:8b298dfada81 | 45 | /*setup baudrate. Choose the same in your program on PC side*/ |
vsluiter | 2:e314bb3b2d99 | 46 | pc.baud(115200); |
vsluiter | 4:8b298dfada81 | 47 | /*set the period for the PWM to the red LED*/ |
vsluiter | 2:e314bb3b2d99 | 48 | red.period_ms(2); |
vsluiter | 4:8b298dfada81 | 49 | /**Here you attach the 'void looper(void)' function to the Ticker object |
vsluiter | 9:d33e7b175ad7 | 50 | * The looper() function will be called every 0.01 seconds. |
vsluiter | 4:8b298dfada81 | 51 | * Please mind that the parentheses after looper are omitted when using attach. |
vsluiter | 4:8b298dfada81 | 52 | */ |
vsluiter | 13:18d4cef1fdb4 | 53 | log_timer.attach(looper, 0.005); |
ArvidKeemink | 1:db54d9412d18 | 54 | while(1) //Loop |
vsluiter | 0:32bb76391d89 | 55 | { |
vsluiter | 4:8b298dfada81 | 56 | /*Empty!*/ |
vsluiter | 4:8b298dfada81 | 57 | /*Everything is handled by the interrupt routine now!*/ |
vsluiter | 0:32bb76391d89 | 58 | } |
vsluiter | 0:32bb76391d89 | 59 | } |