First draft HMC5883 magnetometer sensor using physical quantities, outputting via serial port using std::cout on mbed os 5
main.cpp@10:75c8ce89aeb7, 2020-03-26 (annotated)
- Committer:
- skyscraper
- Date:
- Thu Mar 26 21:59:18 2020 +0000
- Revision:
- 10:75c8ce89aeb7
- Parent:
- 9:87a7169b4d5c
- Child:
- 11:de7c9ae7ef65
clean up a little
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
skyscraper | 0:37dbfb036586 | 1 | |
skyscraper | 0:37dbfb036586 | 2 | #include "mbed.h" |
skyscraper | 8:c5dc1ce10722 | 3 | #include "magnetometer.h" |
skyscraper | 9:87a7169b4d5c | 4 | |
skyscraper | 10:75c8ce89aeb7 | 5 | namespace { |
skyscraper | 0:37dbfb036586 | 6 | |
skyscraper | 10:75c8ce89aeb7 | 7 | // do something with magnetometer output |
skyscraper | 8:c5dc1ce10722 | 8 | void callback(quan::three_d::vect<quan::magnetic_flux_density::uT> const & v) |
skyscraper | 8:c5dc1ce10722 | 9 | { |
skyscraper | 10:75c8ce89aeb7 | 10 | std::cout << "val = " << v << '\n'; |
skyscraper | 8:c5dc1ce10722 | 11 | } |
skyscraper | 8:c5dc1ce10722 | 12 | |
skyscraper | 0:37dbfb036586 | 13 | }// namespace |
skyscraper | 0:37dbfb036586 | 14 | |
skyscraper | 10:75c8ce89aeb7 | 15 | void loop_forever(std::string const & str); |
skyscraper | 10:75c8ce89aeb7 | 16 | |
skyscraper | 0:37dbfb036586 | 17 | int main() |
skyscraper | 0:37dbfb036586 | 18 | { |
skyscraper | 8:c5dc1ce10722 | 19 | DigitalOut led2(LED2,1); |
skyscraper | 8:c5dc1ce10722 | 20 | std::cout << "magnetometer test\n"; |
skyscraper | 0:37dbfb036586 | 21 | |
skyscraper | 8:c5dc1ce10722 | 22 | if ( !mag_init()){ |
skyscraper | 8:c5dc1ce10722 | 23 | loop_forever("failed to init magnetometer\n"); |
skyscraper | 0:37dbfb036586 | 24 | } |
skyscraper | 2:9ffb2f18756b | 25 | |
skyscraper | 8:c5dc1ce10722 | 26 | uint64_t constexpr update_rate_ms = 20U; |
skyscraper | 8:c5dc1ce10722 | 27 | |
skyscraper | 8:c5dc1ce10722 | 28 | auto prev_led = Kernel::get_ms_count(); |
skyscraper | 8:c5dc1ce10722 | 29 | auto now = Kernel::get_ms_count(); |
skyscraper | 9:87a7169b4d5c | 30 | |
skyscraper | 8:c5dc1ce10722 | 31 | for (;;){ |
skyscraper | 9:87a7169b4d5c | 32 | |
skyscraper | 8:c5dc1ce10722 | 33 | mag_start_measurement(); |
skyscraper | 10:75c8ce89aeb7 | 34 | |
skyscraper | 8:c5dc1ce10722 | 35 | do{ |
skyscraper | 8:c5dc1ce10722 | 36 | ThisThread::sleep_for(10U); |
skyscraper | 8:c5dc1ce10722 | 37 | } while ( ! mag_data_ready() ); |
skyscraper | 8:c5dc1ce10722 | 38 | |
skyscraper | 8:c5dc1ce10722 | 39 | quan::three_d::vect<quan::magnetic_flux_density::uT> v; |
skyscraper | 8:c5dc1ce10722 | 40 | if (mag_read(v)){ |
skyscraper | 9:87a7169b4d5c | 41 | callback(v); |
skyscraper | 8:c5dc1ce10722 | 42 | } |
skyscraper | 10:75c8ce89aeb7 | 43 | |
skyscraper | 8:c5dc1ce10722 | 44 | if ( (now - prev_led) >= 500U){ |
skyscraper | 8:c5dc1ce10722 | 45 | prev_led = now; |
skyscraper | 8:c5dc1ce10722 | 46 | led2 = (led2 == 0) ? 1: 0; |
skyscraper | 8:c5dc1ce10722 | 47 | } |
skyscraper | 10:75c8ce89aeb7 | 48 | |
skyscraper | 10:75c8ce89aeb7 | 49 | auto const next_wake = now + update_rate_ms; |
skyscraper | 8:c5dc1ce10722 | 50 | ThisThread::sleep_until(next_wake); |
skyscraper | 8:c5dc1ce10722 | 51 | now = next_wake; |
skyscraper | 8:c5dc1ce10722 | 52 | } |
skyscraper | 0:37dbfb036586 | 53 | } |