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A demonstration of the telemetry library (https://github.com/Overdrivr/Telemetry) to transfert to the desktop various data from the FRDM-TFC shield
Dependencies: BufferedSerial FRDM-TFC-HBRIDGE mbed telemetry
Example of the 'Telemetry' library, a portable communication library for embedded devices.
This code fetches all the data from the Freescale Cup RC-car. It relies on a more advanced shield library that is able to read current feedback from HBridges.
The available data is the following :
- Potentiometer 0
- Potentiometer 1
- 4-bit DIP switch
- Battery level
- current inside HBridge A
- current inside HBridge B
You can use the Pytelemetry Command Line Interface to open plots, visualize the received data, and communicate with the car.
See https://github.com/Overdrivr/pytelemetrycli
main.cpp@0:4fbaf36176b6, 2016-02-17 (annotated)
- Committer:
- Overdrivr
- Date:
- Wed Feb 17 20:43:59 2016 +0000
- Revision:
- 0:4fbaf36176b6
- Child:
- 1:eeaf7cbb5582
Initial commit with telemetry set-up
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Overdrivr | 0:4fbaf36176b6 | 1 | #include "telemetry/driver.hpp" |
Overdrivr | 0:4fbaf36176b6 | 2 | #include "FRDM-TFC/TFC.h" |
Overdrivr | 0:4fbaf36176b6 | 3 | |
Overdrivr | 0:4fbaf36176b6 | 4 | struct TM_state |
Overdrivr | 0:4fbaf36176b6 | 5 | { |
Overdrivr | 0:4fbaf36176b6 | 6 | float throttle; |
Overdrivr | 0:4fbaf36176b6 | 7 | }; |
Overdrivr | 0:4fbaf36176b6 | 8 | |
Overdrivr | 0:4fbaf36176b6 | 9 | void process(TM_state * state, TM_msg * msg); |
Overdrivr | 0:4fbaf36176b6 | 10 | |
Overdrivr | 0:4fbaf36176b6 | 11 | int main() |
Overdrivr | 0:4fbaf36176b6 | 12 | { |
Overdrivr | 0:4fbaf36176b6 | 13 | TFC_Init(); |
Overdrivr | 0:4fbaf36176b6 | 14 | TM_state state; |
Overdrivr | 0:4fbaf36176b6 | 15 | |
Overdrivr | 0:4fbaf36176b6 | 16 | Telemetry tm(&state,115200); |
Overdrivr | 0:4fbaf36176b6 | 17 | tm.sub(process); |
Overdrivr | 0:4fbaf36176b6 | 18 | |
Overdrivr | 0:4fbaf36176b6 | 19 | Timer refresh_timer; |
Overdrivr | 0:4fbaf36176b6 | 20 | refresh_timer.start(); |
Overdrivr | 0:4fbaf36176b6 | 21 | TFC_HBRIDGE_ENABLE; |
Overdrivr | 0:4fbaf36176b6 | 22 | for( ; ; ) |
Overdrivr | 0:4fbaf36176b6 | 23 | { |
Overdrivr | 0:4fbaf36176b6 | 24 | if(refresh_timer.read_ms() > 100) |
Overdrivr | 0:4fbaf36176b6 | 25 | { |
Overdrivr | 0:4fbaf36176b6 | 26 | tm.pub_f32("left",TFC_ReadMotorCurrent(0)); |
Overdrivr | 0:4fbaf36176b6 | 27 | tm.pub_f32("right",TFC_ReadMotorCurrent(1)); |
Overdrivr | 0:4fbaf36176b6 | 28 | tm.pub_f32("pot0",TFC_ReadPot(0)); |
Overdrivr | 0:4fbaf36176b6 | 29 | tm.pub_f32("pot1",TFC_ReadPot(1)); |
Overdrivr | 0:4fbaf36176b6 | 30 | tm.pub_f32("throttle",state.throttle); |
Overdrivr | 0:4fbaf36176b6 | 31 | tm.pub_f32("bat",TFC_ReadBatteryVoltage()); |
Overdrivr | 0:4fbaf36176b6 | 32 | |
Overdrivr | 0:4fbaf36176b6 | 33 | TFC_SetMotorPWM(state.throttle ,state.throttle); |
Overdrivr | 0:4fbaf36176b6 | 34 | tm.update(); |
Overdrivr | 0:4fbaf36176b6 | 35 | } |
Overdrivr | 0:4fbaf36176b6 | 36 | } |
Overdrivr | 0:4fbaf36176b6 | 37 | } |
Overdrivr | 0:4fbaf36176b6 | 38 | |
Overdrivr | 0:4fbaf36176b6 | 39 | void process(TM_state * state, TM_msg * msg) |
Overdrivr | 0:4fbaf36176b6 | 40 | { |
Overdrivr | 0:4fbaf36176b6 | 41 | if(msg->type == TM_float32) |
Overdrivr | 0:4fbaf36176b6 | 42 | { |
Overdrivr | 0:4fbaf36176b6 | 43 | float th = 0; |
Overdrivr | 0:4fbaf36176b6 | 44 | if(emplace_f32(msg,&th)) |
Overdrivr | 0:4fbaf36176b6 | 45 | { |
Overdrivr | 0:4fbaf36176b6 | 46 | state->throttle = th; |
Overdrivr | 0:4fbaf36176b6 | 47 | } |
Overdrivr | 0:4fbaf36176b6 | 48 | } |
Overdrivr | 0:4fbaf36176b6 | 49 | } |