Estoy trabajando para usar este OLED pero no sé ¿¡por qué no funciona !? El esquema del adaptador es este:
yesteesunproyectoensambladoeneltablero:
cuandorevisolospinesdeSPIdelmicrocontrolador(porLogicAnalyzer-saleae),veoestos:
ymiscódigossonesto:
/*****************************************************Project:OLEDDate:03/14/2014Author:RohChiptype:ATmega32AProgramtype:ApplicationAVRCoreClockfrequency:16.000000MHzMemorymodel:SmallExternalRAMsize:0DataStacksize:512*****************************************************/#include<mega32a.h>#include<delay.h>//SPIfunctions#include<spi.h>#defineBrightness0xCF#defineDCPORTA.0#defineRSTPORTA.1//DeclareyourglobalvariablesherevoidOLED_Init_I();voidFill_RAM(unsignedcharData);voidmain(void){//PortAinitialization//Func7=InFunc6=InFunc5=InFunc4=InFunc3=InFunc2=OutFunc1=OutFunc0=Out//State7=TState6=TState5=TState4=TState3=TState2=0State1=0State0=0PORTA=0x00;DDRA=0x07;//PortBinitialization//Func7=OutFunc6=OutFunc5=OutFunc4=OutFunc3=InFunc2=InFunc1=InFunc0=In//State7=0State6=0State5=0State4=0State3=TState2=TState1=TState0=TPORTB=0x00;DDRB=0xF0;PORTC=0x00;DDRC=0x00;PORTD=0x00;DDRD=0x00;//SPIinitialization//SPIType:Master//SPIClockRate:4000.000kHz//SPIClockPhase:CycleStart//SPIClockPolarity:Low//SPIDataOrder:MSBFirstSPCR=0x50;SPSR=0x00;OLED_Init_I();while(1){Fill_RAM(0xFF);delay_ms(1000);Fill_RAM(0x00);delay_ms(1000);//Placeyourcodehere}}voidspi_transfer_nr(unsignedchardata){DC=0;SPDR=data;while(!(SPSR&(1<<SPIF)));}voidspi_transfer_nr1(unsignedchardata){DC=1;SPDR=data;while(!(SPSR&(1<<SPIF)));}voidSet_Display_On_Off(unsignedchard){spi_transfer_nr(0xAE|d);//SetDisplayOn/Off//Default=>0xAE//0xAE(0x00)=>DisplayOff//0xAF(0x01)=>DisplayOn}voidSet_Display_Clock(unsignedchard){spi_transfer_nr(0xD5);//SetDisplayClockDivideRatio/OscillatorFrequencyspi_transfer_nr(d);//Default=>0x80//D[3:0]=>DisplayClockDivider//D[7:4]=>OscillatorFrequency}voidSet_Multiplex_Ratio(unsignedchard){spi_transfer_nr(0xA8);//SetMultiplexRatiospi_transfer_nr(d);//Default=>0x3F(1/64Duty)}voidSet_Display_Offset(unsignedchard){spi_transfer_nr(0xD3);//SetDisplayOffsetspi_transfer_nr(d);//Default=>0x00}voidSet_Start_Line(unsignedchard){spi_transfer_nr(0x40|d);//SetDisplayStartLine//Default=>0x40(0x00)}voidSet_Charge_Pump(unsignedchard){spi_transfer_nr(0x8D);//SetChargePumpspi_transfer_nr(0x10|d);//Default=>0x10//0x10(0x00)=>DisableChargePump//0x14(0x04)=>EnableChargePump}voidSet_Addressing_Mode(unsignedchard){spi_transfer_nr(0x20);//SetMemoryAddressingModespi_transfer_nr(d);//Default=>0x02//0x00=>HorizontalAddressingMode//0x01=>VerticalAddressingMode//0x02=>PageAddressingMode}voidSet_Segment_Remap(unsignedchard){spi_transfer_nr(0xA0|d);//SetSegmentRe-Map//Default=>0xA0//0xA0(0x00)=>ColumnAddress0MappedtoSEG0//0xA1(0x01)=>ColumnAddress0MappedtoSEG127}voidSet_Common_Remap(unsignedchard){spi_transfer_nr(0xC0|d);//SetCOMOutputScanDirection//Default=>0xC0//0xC0(0x00)=>ScanfromCOM0to63//0xC8(0x08)=>ScanfromCOM63to0}voidSet_Common_Config(unsignedchard){spi_transfer_nr(0xDA);//SetCOMPinsHardwareConfigurationspi_transfer_nr(0x02|d);//Default=>0x12(0x10)//AlternativeCOMPinConfiguration//DisableCOMLeft/RightRe-Map}voidSet_Contrast_Control(unsignedchard){spi_transfer_nr(0x81);//SetContrastControlspi_transfer_nr(d);//Default=>0x7F}voidSet_Precharge_Period(unsignedchard){spi_transfer_nr(0xD9);//SetPre-ChargePeriodspi_transfer_nr(d);//Default=>0x22(2DisplayClocks[Phase2]/2DisplayClocks[Phase1])//D[3:0]=>Phase1Periodin1~15DisplayClocks//D[7:4]=>Phase2Periodin1~15DisplayClocks}voidSet_VCOMH(unsignedchard){spi_transfer_nr(0xDB);//SetVCOMHDeselectLevelspi_transfer_nr(d);//Default=>0x20(0.77*VCC)}voidSet_Entire_Display(unsignedchard){spi_transfer_nr(0xA4|d);//SetEntireDisplayOn/Off//Default=>0xA4//0xA4(0x00)=>NormalDisplay//0xA5(0x01)=>EntireDisplayOn}voidSet_Inverse_Display(unsignedchard){spi_transfer_nr(0xA6|d);//SetInverseDisplayOn/Off//Default=>0xA6//0xA6(0x00)=>NormalDisplay//0xA7(0x01)=>InverseDisplayOn}voidSet_Start_Column(unsignedchard){spi_transfer_nr(0x00+d%16);//SetLowerColumnStartAddressforPageAddressingMode//Default=>0x00spi_transfer_nr(0x10+d/16);//SetHigherColumnStartAddressforPageAddressingMode//Default=>0x10}voidSet_Start_Page(unsignedchard){spi_transfer_nr(0xB0|d);//SetPageStartAddressforPageAddressingMode//Default=>0xB0(0x00)}voidFill_RAM(unsignedcharData){unsignedchari,j;for(i=0;i<8;i++){Set_Start_Page(i);Set_Start_Column(0x00);for(j=0;j<128;j++){spi_transfer_nr1(Data);}}}voidOLED_Init_I()//VCCGeneratedbyInternalDC/DCCircuit{unsignedchari;RST=0;for(i=0;i<200;i++){delay_us(200);//uDelay(200);}RST=1;Set_Display_On_Off(0x00);//DisplayOff(0x00/0x01)Set_Display_Clock(0x80);//SetClockas100Frames/SecSet_Multiplex_Ratio(0x3F);//1/64Duty(0x0F~0x3F)Set_Display_Offset(0x00);//ShiftMappingRAMCounter(0x00~0x3F)Set_Start_Line(0x00);//SetMappingRAMDisplayStartLine(0x00~0x3F)Set_Charge_Pump(0x04);//EnableEmbeddedDC/DCConverter(0x00/0x04)Set_Addressing_Mode(0x02);//SetPageAddressingMode(0x00/0x01/0x02)Set_Segment_Remap(0x01);//SetSEG/ColumnMapping(0x00/0x01)Set_Common_Remap(0x08);//SetCOM/RowScanDirection(0x00/0x08)Set_Common_Config(0x10);//SetSequentialConfiguration(0x00/0x10)Set_Contrast_Control(Brightness);//SetSEGOutputCurrentSet_Precharge_Period(0xF1);//SetPre-Chargeas15Clocks&Dischargeas1ClockSet_VCOMH(0x40);//SetVCOMDeselectLevelSet_Entire_Display(0x00);//DisableEntireDisplayOn(0x00/0x01)Set_Inverse_Display(0x00);//DisableInverseDisplayOn(0x00/0x01)Fill_RAM(0x00);//ClearScreenSet_Display_On_Off(0x01);//DisplayOn(0x00/0x01)}Utilicélabombadecarga.entonceselpoderdeOLEDes:
- 4voltaVbat
- 3voltaVdd
HeutilizadoelSPI(modode4hilos.Paraobtenermásinformación,puedeverlahojadedatosylosarchivosdecomandos)
- UG-2864HSWEG01 Dibujo - 090120B.pdf
- UG-2864HSWEG01 user guide.pdf
en su opinión, ¿cuál es el problema?