Data Structures | |
| struct | adc_t |
| Struct to hold the value of a particular analog port. More... | |
Defines | |
| #define | AN0 0x00 |
| Analog port 0. | |
| #define | AN1 0x01 |
| Analog port 1. | |
| #define | AN2 0x02 |
| Analog port 2. | |
| #define | AN3 0x03 |
| Analog port 3. | |
| #define | AN4 0x04 |
| Analog port 4. | |
| #define | AN5 0x05 |
| Analog port 5. | |
| #define | AN6 0x06 |
| Analog port 6. | |
| #define | AN7 0x07 |
| Analog port 7. | |
| #define | AN8 0x08 |
| Analog port 8. | |
| #define | AN9 0x09 |
| Analog port 9. | |
| #define | AN10 0x0A |
| Analog port 10. | |
| #define | AN11 0x0B |
| Analog port 11. | |
| #define | AN12 0x0C |
| Analog port 12. | |
| #define | AN13 0x0D |
| Analog port 13. | |
| #define | AN14 0x0E |
| Analog port 14. | |
| #define | AN15 0x0F |
| Analog port 15. | |
| #define | BOM_PORT AN0 |
| BOM_PORT analog port for BOM. | |
| #define | EXT_MUX AN7 |
| EXT_MUX analog port. | |
| #define | WHEEL_PORT AN10 |
| Analog port for the wheel. | |
| #define | BATT_PORT AN11 |
| Analog port for the battery voltage detector. | |
| #define | ADC_START 1 |
| #define | ADC_STOP 0 |
| #define | ADMUX_OPT 0x60 |
Functions | |
| void | analog_init (int start_conversion) |
| Initialize analog ports. Will start running a loop if start_conversion is ADC_START. | |
| unsigned int | analog8 (int which) |
| Returns an 8-bit analog value from the look up table. Use this instead of analog_get8. | |
| unsigned int | analog10 (int which) |
| Returns an 10-bit analog value from the look up table. Use this instead of analog_get10. | |
| void | analog_start_loop (void) |
| starts the analog loop. Doesn't do anything if the loop is already running. | |
| void | analog_stop_loop (void) |
| Stops the analog loop. Doesn't do anything if the loop is already stopped. | |
| unsigned int | analog_get8 (int which) |
| Read an 8-bit number from an analog port. Loop must be stopped for this to work. | |
| unsigned int | analog_get10 (int which) |
| Read a 10-bit number from an analog port. Loop must be stopped for this to work. | |
| int | wheel (void) |
| Read the position of the wheel. | |
| void | set_adc_mux (int which) |
Variables | |
| int | adc_loop_running = 0 |
| int | adc_current_port = 0 |
| adc_t | an_val [11] |
| unsigned int analog10 | ( | int | which | ) |
Returns an 10-bit analog value from the look up table. Use this instead of analog_get10.
Returns the 10-bit analog conversion of which from the lookup table. If the requested port is the BOM_PORT you will get an automatic 0 since the BOM_PORT is not read in the loop and not stored. If you need that port you should use the functions in bom.c. There is an analog_get10 function which for instant lookups but should be avoided unless you know what you are doing.
| which | the port that you want to read |
References adc_t::adc10, and BOM_PORT.
| unsigned int analog8 | ( | int | which | ) |
Returns an 8-bit analog value from the look up table. Use this instead of analog_get8.
Returns the 8-bit analog conversion of which from the lookup table. If the requested port is the BOM_PORT you will get an automatic 0 since the BOM_PORT is not read in the loop and not stored. If you need that port you should use the functions in bom.c. There is an analog_get8 function which for instant lookups but should be avoided unless you know what you're doing.
| which | the port that you want to read |
References adc_t::adc8, and BOM_PORT.
Referenced by battery(), battery8(), range_read_distance(), and wheel().
| unsigned int analog_get10 | ( | int | which | ) |
Read a 10-bit number from an analog port. Loop must be stopped for this to work.
Reads an 10-bit number from an analog port. analog_init must be called before using this function. The analog loop must also be stopped before using this function or you will mess up the lookup table. You must also reenabled the loop when you are done unless you are doing more instant reads. See analog_stop_loop and analog_start_loop for more information about the loop.
| which | the analog port to read from. Typically a constant, one of AN0 - AN7. |
References EXT_MUX, and set_adc_mux().
| unsigned int analog_get8 | ( | int | which | ) |
Read an 8-bit number from an analog port. Loop must be stopped for this to work.
Reads an 8-bit number from an analog port. analog_init must be called before using this function. The analog loop must also be stopped before using this function or you will mess up the lookup table. You must also reenabled the loop when you are done unless you are doing more instant reads. See analog_stop_loop and analog_start_loop for more information about the loop.
| which | the analog port to read from. One of the constants AN0 - AN7. |
References EXT_MUX, and set_adc_mux().
Referenced by bom_refresh().
| void analog_init | ( | int | start_conversion | ) |
Initialize analog ports. Will start running a loop if start_conversion is ADC_START.
Initializes the ADC. Call analog_init before reading from the analog ports.
References adc_t::adc10, adc_t::adc8, AN1, analog_start_loop(), analog_stop_loop(), and set_adc_mux().
Referenced by dragonfly_init().
| void analog_start_loop | ( | void | ) |
starts the analog loop. Doesn't do anything if the loop is already running.
Starts the analog update loop. Will continue to run until analog_stop_loop is called.
Referenced by analog_init(), and bom_refresh().
| void analog_stop_loop | ( | void | ) |
Stops the analog loop. Doesn't do anything if the loop is already stopped.
Stops the analog update loop. If there is a current read, it will finish up and be stored before the loop is interrupted. No further updates will be made until the loop is started again.
Referenced by analog_init(), and bom_refresh().
| void set_adc_mux | ( | int | which | ) |
Sets the value of the external analog mux. Values are read on AN7 physical port. (AN8 - AN15 are "virtual" ports).
| which | which analog mux port (0-7) which corresponds to AN8-AN15. |
Referenced by analog_get10(), analog_get8(), and analog_init().
| int wheel | ( | void | ) |
Read the position of the wheel.
Returns the current position of the wheel, as an integer in the range 0 - 255. analog_init must be called before using this function.
References analog8(), and WHEEL_PORT.
1.5.5