christian b
Mbed 4dGenie class
Dependents: Genie_Test 039847382-S3_DS1621_and_LCD_V1
This is a work in progress.
4dGenie class to use with 4dLCD screens that are using the genie environment.
There are still some rare occasions where the 4dLCD might crash, for now i have no solution to this except doing a reset of the 4dLCD.
Please make sure to have the most up to date PmmC loaded on the screen.
usage example :
Mbed4dGenie test program
#include "mbed.h"
#include "mbed_genie.h"
DigitalOut myled(LED1);
/*
The Mbed4dGenie class requires 3 parameters
1 - Tx pin
2 - Rx pin
3 - Reset pin
*/
Mbed4dGenie lcd4d(PTE0,PTE1,PTB9);
int main() {
int temp = 0;
printf("Mbed Genie demo \n\r");
lcd4d.Start();
/*
for example, in this loop we increment the thermometer0 object from 0 to 100
*/
while(1) {
if(temp >= 100)
{
temp = -1;
}
else
{
temp++;
}
lcd4d.genieWriteObject(GENIE_OBJ_LED_DIGITS,1,temp);
myled = 1;
wait(0.05);
myled = 0;
wait(0.05);
}
}
Diff: mbed_genie.h
- Revision:
- 6:f4d3977b0eae
- Parent:
- 3:11c49c49cd1a
- Child:
- 7:6edb20845684
--- a/mbed_genie.h Sun Feb 23 17:32:37 2014 +0000
+++ b/mbed_genie.h Fri Jul 04 02:44:49 2014 +0000
@@ -1,7 +1,3 @@
-#undef GENIE_DEBUG
-
-#define GENIE_VERSION "GenieMbed 17-Nov-2013"
-
// Genie commands & replys:
#define GENIE_ACK 0x06
@@ -61,44 +57,6 @@
// Structure to store replys returned from a display
#define GENIE_FRAME_SIZE 6
-struct genieFrameReportObj {
- uint8_t cmd;
- uint8_t object;
- uint8_t index;
- uint8_t data_msb;
- uint8_t data_lsb;
-};
-
-/////////////////////////////////////////////////////////////////////
-// The Genie frame definition
-//
-// The union allows the data to be referenced as an array of uint8_t
-// or a structure of type genieFrameReportObj, eg
-//
-// genieFrame f;
-// f.bytes[4];
-// f.reportObject.data_lsb
-//
-// both methods get the same byte
-//
-union genieFrame {
- uint8_t bytes[GENIE_FRAME_SIZE];
- genieFrameReportObj reportObject;
-};
-
-#define MAX_GENIE_EVENTS 16 // MUST be a power of 2
-#define MAX_GENIE_FATALS 10
-
-struct genieEventQueueStruct {
- genieFrame frames[MAX_GENIE_EVENTS];
- uint8_t rd_index;
- uint8_t wr_index;
- uint8_t n_events;
-};
-
-typedef void (*geniePutCharFuncPtr) (uint8_t c, uint32_t baud);
-typedef uint16_t (*genieGetCharFuncPtr) (void);
-typedef void (*genieUserEventHandlerPtr) (void);
#define ERROR_NONE 0
#define ERROR_TIMEOUT -1 // 255 0xFF
@@ -125,72 +83,35 @@
#define FALSE (!TRUE)
#endif
-void SetupGenie(void);
-void genieAttachEventHandler (genieUserEventHandlerPtr handler);
-extern bool genieDequeueEvent (genieFrame * buff);
-extern bool genieEventIs (genieFrame * e, uint8_t cmd, uint8_t object, uint8_t index);
-extern uint16_t genieGetEventData (genieFrame * e);
-extern uint16_t genieWriteObject (uint16_t object, uint16_t index, uint16_t data);
-extern uint16_t genieWriteStr (uint16_t index, char *string);
-extern void genieWriteContrast (uint16_t value);
-
class Mbed4dGenie{
public:
+ /*
+ Constructor to initialise the pins used to control the lcd screen
+ Note: When the class is first initialised, the lcd screen will be put
+ in reset and kept reset until Start() is called
+ */
Mbed4dGenie(PinName TxPin,PinName RxPin, PinName resetpin);
- void genieAttachEventHandler (genieUserEventHandlerPtr handler);
- uint16_t genieWriteStrU (uint16_t index, char *string);
- uint16_t genieWriteStr (uint16_t index, char *string);
- void genieWriteContrast (uint16_t value);
- uint16_t genieWriteObject (uint16_t object, uint16_t index, uint16_t data);
- bool genieDequeueEvent(genieFrame * buff);
- uint16_t genieGetEventData (genieFrame * e);
- bool genieEventIs(genieFrame * e, uint8_t cmd, uint8_t object, uint8_t index);
- bool GenieReadable(void);
- uint16_t genieDoEvents (void);
+ /*
+ Deassert the reset pin and give some time to the lcd to
+ initialise itself before sending any commands.
+ */
+ void Start();
+ /*
+ Generic command to write data to a Genie object
+ returns the status code of operation
+ */
+ int8_t genieWriteObject (uint16_t object, uint16_t index, uint16_t data);
- private:
- void RxIrqHandler(void);
- uint8_t _genieGetchar(void);
- void _geniePutchar (uint8_t c);
- uint16_t _genieGetLinkState (void);
- void _genieSetLinkState (uint16_t newstate);
- bool _genieEnqueueEvent (uint8_t * data);
- int _genieWriteStrX (uint16_t code, uint16_t index, char *string);
- void _genieWaitForIdle (void);
- void _geniePushLinkState (uint8_t newstate);
- void _geniePopLinkState (void);
- void _genieFlushSerialInput(void);
- void _handleError (void);
- void _genieFlushEventQueue(void);
-
+ private:
+ /*
+ Wait for the screen to aknowledge the command
+ returns the status code of operation
+ */
+ int8_t WaitForAnswer();
+
+
+
Serial _screen;
+ DigitalOut _reset;
Timer _t;
- DigitalOut _reset;
- //////////////////////////////////////////////////////////////
- // Pointer to the user's event handler function
- //
- genieUserEventHandlerPtr _genieUserHandler;
- //////////////////////////////////////////////////////////////
- // A structure to hold up to MAX_GENIE_EVENTS events receive
- // from the display
- //
- genieEventQueueStruct _genieEventQueue;
- //////////////////////////////////////////////////////////////
- // Simple 5-deep stack for the link state, this allows
- // genieDoEvents() to save the current state, receive a frame,
- // then restore the state
- //
- uint8_t _genieLinkStates[5];
- //
- // Stack pointer
- //
- uint8_t *_genieLinkState;
- //////////////////////////////////////////////////////////////
- // Number of mS the genieGetChar() function will wait before
- // giving up on the display
- int _genieTimeout;
- //////////////////////////////////////////////////////////////
- // Global error variable
- int _genieError;
- uint8_t rxframe_count;
- };
+ };
\ No newline at end of file