root / branches / autonomous_recharging / code / projects / autonomous_recharging / dragonfly / recharge_i2c.c @ 138
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1 | 105 | bcoltin | #include "recharge_i2c.h" |
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3 | 137 | bcoltin | #include "recharge_defs.h" |
4 | 105 | bcoltin | #include <i2c.h> |
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6 | // definitions for I2C messages
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7 | #define I2C_MSG_ACKNOWLEDGE 'A' |
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8 | #define I2C_MSG_BATTERY_CHARGING 'C' |
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9 | #define I2C_MSG_DATA 'D' |
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10 | #define I2C_MSG_CONTACT_ERROR 'E' |
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11 | #define I2C_MSG_BATTERY_FULL 'F' |
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12 | #define I2C_MSG_HOMING_DATA 'H' |
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13 | #define I2C_MSG_NO_CONTACT 'N' |
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14 | #define I2C_MSG_REQUEST_DATA 'R' |
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15 | #define I2C_MSG_GO_TO_SLEEP 'Y' |
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16 | #define I2C_MSG_ENTERING_SLEEP 'Z' |
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17 | |||
18 | // function prototypes
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19 | void recharge_i2c_receive(char i2c_byte); |
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20 | |||
21 | // global variables
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22 | char recharge_i2c_prev_byte = 0; |
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23 | char recharge_i2c_homing_sensor_data = 0; |
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24 | char recharge_i2c_battery_full = 0; |
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25 | char recharge_i2c_battery_charging = 0; |
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26 | |||
27 | void recharge_i2c_init()
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28 | { |
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29 | i2c_init(1, NULL, recharge_i2c_receive, NULL); |
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30 | } |
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31 | |||
32 | /**
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33 | * Returns the latest reading from the homing sensor.
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34 | *
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35 | * @return the latest reading from the homing sensor
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36 | **/
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37 | int recharge_i2c_get_homing_reading()
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38 | { |
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39 | return (int)recharge_i2c_homing_sensor_data; |
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40 | } |
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41 | |||
42 | int recharge_i2c_is_battery_full()
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43 | { |
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44 | return recharge_i2c_battery_full;
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45 | } |
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46 | |||
47 | int recharge_i2c_is_battery_charging()
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48 | { |
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49 | return recharge_i2c_battery_charging;
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50 | } |
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51 | |||
52 | /**
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53 | * Called when we receive a byte through i2c.
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54 | *
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55 | * @param c the byte we receive
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56 | **/
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57 | void recharge_i2c_receive(char i2c_byte) |
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58 | { |
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59 | if(recharge_i2c_prev_byte == I2C_MSG_HOMING_DATA)
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60 | { |
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61 | recharge_i2c_homing_sensor_data = i2c_byte; |
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62 | recharge_i2c_prev_byte = i2c_byte; |
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63 | return;
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64 | } |
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65 | |||
66 | switch(i2c_byte)
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67 | { |
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68 | case I2C_MSG_BATTERY_CHARGING:
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69 | recharge_i2c_battery_charging = 1;
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70 | break;
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71 | case I2C_MSG_CONTACT_ERROR:
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72 | recharge_i2c_battery_charging = 0;
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73 | break;
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74 | case I2C_MSG_BATTERY_FULL:
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75 | recharge_i2c_battery_full = 1;
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76 | break;
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77 | case I2C_MSG_NO_CONTACT:
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78 | recharge_i2c_battery_charging = 0;
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79 | break;
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80 | default:
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81 | break;
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82 | } |
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83 | recharge_i2c_prev_byte = i2c_byte; |
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84 | } |