//=====[Libraries]============================================================= //#include "mbed.h" //#include "arm_book_lib.h" #include "display.h" #include "main.h" #include /* Demo includes */ #include "logger.h" #include "dwt.h" #include "systick.h" /********************** arm_book Defines *******************************/ //#include "arm_book_lib.h" // Functional states #ifndef OFF #define OFF 0 #endif #ifndef ON #define ON ( !OFF ) #endif // Electrical states #ifndef LOW #define LOW 0 #endif #ifndef HIGH #define HIGH ( !LOW ) #endif //=====[Declaration of private defines]======================================== #define DISPLAY_IR_CLEAR_DISPLAY 0b00000001 #define DISPLAY_IR_SET_CURSOR_HOME 0b00000010 #define DISPLAY_IR_ENTRY_MODE_SET 0b00000100 #define DISPLAY_IR_DISPLAY_CONTROL 0b00001000 #define DISPLAY_IR_FUNCTION_SET 0b00100000 #define DISPLAY_IR_SET_DDRAM_ADDR 0b10000000 #define DISPLAY_IR_ENTRY_MODE_SET_INCREMENT 0b00000010 #define DISPLAY_IR_ENTRY_MODE_SET_DECREMENT 0b00000000 #define DISPLAY_IR_ENTRY_MODE_SET_SHIFT 0b00000001 #define DISPLAY_IR_ENTRY_MODE_SET_NO_SHIFT 0b00000000 #define DISPLAY_IR_DISPLAY_CONTROL_DISPLAY_ON 0b00000100 #define DISPLAY_IR_DISPLAY_CONTROL_DISPLAY_OFF 0b00000000 #define DISPLAY_IR_DISPLAY_CONTROL_CURSOR_ON 0b00000010 #define DISPLAY_IR_DISPLAY_CONTROL_CURSOR_OFF 0b00000000 #define DISPLAY_IR_DISPLAY_CONTROL_BLINK_ON 0b00000001 #define DISPLAY_IR_DISPLAY_CONTROL_BLINK_OFF 0b00000000 #define DISPLAY_IR_FUNCTION_SET_8BITS 0b00010000 #define DISPLAY_IR_FUNCTION_SET_4BITS 0b00000000 #define DISPLAY_IR_FUNCTION_SET_2LINES 0b00001000 #define DISPLAY_IR_FUNCTION_SET_1LINE 0b00000000 #define DISPLAY_IR_FUNCTION_SET_5x10DOTS 0b00000100 #define DISPLAY_IR_FUNCTION_SET_5x8DOTS 0b00000000 #define DISPLAY_20x4_LINE1_FIRST_CHARACTER_ADDRESS 0 #define DISPLAY_20x4_LINE2_FIRST_CHARACTER_ADDRESS 64 #define DISPLAY_20x4_LINE3_FIRST_CHARACTER_ADDRESS 20 #define DISPLAY_20x4_LINE4_FIRST_CHARACTER_ADDRESS 84 #define DISPLAY_RS_INSTRUCTION 0 #define DISPLAY_RS_DATA 1 #define DISPLAY_RW_WRITE 0 #define DISPLAY_RW_READ 1 #define DISPLAY_PIN_RS 4 #define DISPLAY_PIN_RW 5 #define DISPLAY_PIN_EN 6 #define DISPLAY_PIN_D0 7 #define DISPLAY_PIN_D1 8 #define DISPLAY_PIN_D2 9 #define DISPLAY_PIN_D3 10 #define DISPLAY_PIN_D4 11 #define DISPLAY_PIN_D5 12 #define DISPLAY_PIN_D6 13 #define DISPLAY_PIN_D7 14 #define DISPLAY_DEL_37US 37ul #define DISPLAY_DEL_01US 01ul //=====[Declaration of private data types]===================================== //=====[Declaration and initialization of public global objects]=============== /* DigitalOut displayD0( D0 ); DigitalOut displayD1( D1 ); DigitalOut displayD2( D2 ); DigitalOut displayD3( D3 ); DigitalOut displayD4( D4 ); DigitalOut displayD5( D5 ); DigitalOut displayD6( D6 ); DigitalOut displayD7( D7 ); DigitalOut displayRs( D8 ); DigitalOut displayEn( D9 ); */ //=====[Declaration of external public global variables]======================= //=====[Declaration and initialization of private global variables]============ static display_t display; static bool initial8BitCommunicationIsCompleted; //=====[Declarations (prototypes) of private functions]======================== static void displayPinWrite( uint8_t pinName, int value ); static void displayDataBusWrite( uint8_t dataByte ); static void displayCodeWrite( bool type, uint8_t dataBus ); //=====[Implementations of public functions]=================================== void displayInit( displayConnection_t connection ) { display.connection = connection; initial8BitCommunicationIsCompleted = false; HAL_Delay(50); displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_FUNCTION_SET | DISPLAY_IR_FUNCTION_SET_8BITS ); HAL_Delay(5); displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_FUNCTION_SET | DISPLAY_IR_FUNCTION_SET_8BITS ); HAL_Delay(1); displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_FUNCTION_SET | DISPLAY_IR_FUNCTION_SET_8BITS ); HAL_Delay(1); switch( display.connection ) { case DISPLAY_CONNECTION_GPIO_8BITS: displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_FUNCTION_SET | DISPLAY_IR_FUNCTION_SET_8BITS | DISPLAY_IR_FUNCTION_SET_2LINES | DISPLAY_IR_FUNCTION_SET_5x8DOTS ); HAL_Delay(1); break; case DISPLAY_CONNECTION_GPIO_4BITS: displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_FUNCTION_SET | DISPLAY_IR_FUNCTION_SET_4BITS ); HAL_Delay(1); initial8BitCommunicationIsCompleted = true; displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_FUNCTION_SET | DISPLAY_IR_FUNCTION_SET_4BITS | DISPLAY_IR_FUNCTION_SET_2LINES | DISPLAY_IR_FUNCTION_SET_5x8DOTS ); HAL_Delay(1); break; } displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_DISPLAY_CONTROL | DISPLAY_IR_DISPLAY_CONTROL_DISPLAY_OFF | DISPLAY_IR_DISPLAY_CONTROL_CURSOR_OFF | DISPLAY_IR_DISPLAY_CONTROL_BLINK_OFF ); HAL_Delay(1); displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_CLEAR_DISPLAY ); HAL_Delay(1); displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_ENTRY_MODE_SET | DISPLAY_IR_ENTRY_MODE_SET_INCREMENT | DISPLAY_IR_ENTRY_MODE_SET_NO_SHIFT ); HAL_Delay(1); displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_DISPLAY_CONTROL | DISPLAY_IR_DISPLAY_CONTROL_DISPLAY_ON | DISPLAY_IR_DISPLAY_CONTROL_CURSOR_OFF | DISPLAY_IR_DISPLAY_CONTROL_BLINK_OFF ); HAL_Delay(1); } void displayClear(void) { displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_CLEAR_DISPLAY); HAL_Delay(1); } void displayCharPositionWrite( uint8_t charPositionX, uint8_t charPositionY ) { switch( charPositionY ) { case 0: displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_SET_DDRAM_ADDR | ( DISPLAY_20x4_LINE1_FIRST_CHARACTER_ADDRESS + charPositionX ) ); //HAL_Delay(1); break; case 1: displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_SET_DDRAM_ADDR | ( DISPLAY_20x4_LINE2_FIRST_CHARACTER_ADDRESS + charPositionX ) ); //HAL_Delay(1); break; case 2: displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_SET_DDRAM_ADDR | ( DISPLAY_20x4_LINE3_FIRST_CHARACTER_ADDRESS + charPositionX ) ); //HAL_Delay(1); break; case 3: displayCodeWrite( DISPLAY_RS_INSTRUCTION, DISPLAY_IR_SET_DDRAM_ADDR | ( DISPLAY_20x4_LINE4_FIRST_CHARACTER_ADDRESS + charPositionX ) ); //HAL_Delay(1); break; } } void displayStringWrite( const char * str ) { while (*str) { displayCodeWrite(DISPLAY_RS_DATA, *str++); } } //=====[Implementations of private functions]================================== static void displayCodeWrite( bool type, uint8_t dataBus ) { if ( type == DISPLAY_RS_INSTRUCTION ) displayPinWrite( DISPLAY_PIN_RS, DISPLAY_RS_INSTRUCTION ); else displayPinWrite( DISPLAY_PIN_RS, DISPLAY_RS_DATA ); displayPinWrite( DISPLAY_PIN_RW, DISPLAY_RW_WRITE ); displayDataBusWrite( dataBus ); systick_delay_us(DISPLAY_DEL_37US); } static void displayPinWrite( uint8_t pinName, int value ) { switch( display.connection ) { case DISPLAY_CONNECTION_GPIO_8BITS: switch( pinName ) { /* case DISPLAY_PIN_D0: displayD0 = value; break; case DISPLAY_PIN_D1: displayD1 = value; break; case DISPLAY_PIN_D2: displayD2 = value; break; case DISPLAY_PIN_D3: displayD3 = value; break; case DISPLAY_PIN_D4: displayD4 = value; break; case DISPLAY_PIN_D5: displayD5 = value; break; case DISPLAY_PIN_D6: displayD6 = value; break; case DISPLAY_PIN_D7: displayD7 = value; break; case DISPLAY_PIN_RS: displayRs = value; break; case DISPLAY_PIN_EN: displayEn = value; break; case DISPLAY_PIN_RW: break; */ default: break; } break; case DISPLAY_CONNECTION_GPIO_4BITS: switch( pinName ) { case DISPLAY_PIN_D4: HAL_GPIO_WritePin(D4_GPIO_Port, D4_Pin, value); break; case DISPLAY_PIN_D5: HAL_GPIO_WritePin(D5_GPIO_Port, D5_Pin, value); break; case DISPLAY_PIN_D6: HAL_GPIO_WritePin(D6_GPIO_Port, D6_Pin, value); break; case DISPLAY_PIN_D7: HAL_GPIO_WritePin(D7_GPIO_Port, D7_Pin, value); break; case DISPLAY_PIN_RS: HAL_GPIO_WritePin(D8_GPIO_Port, D8_Pin, value); break; case DISPLAY_PIN_EN: HAL_GPIO_WritePin(D9_GPIO_Port, D9_Pin, value); break; case DISPLAY_PIN_RW: break; default: break; } break; } } static void displayDataBusWrite( uint8_t dataBus ) { displayPinWrite( DISPLAY_PIN_EN, OFF ); displayPinWrite( DISPLAY_PIN_D7, dataBus & 0b10000000 ); displayPinWrite( DISPLAY_PIN_D6, dataBus & 0b01000000 ); displayPinWrite( DISPLAY_PIN_D5, dataBus & 0b00100000 ); displayPinWrite( DISPLAY_PIN_D4, dataBus & 0b00010000 ); switch( display.connection ) { case DISPLAY_CONNECTION_GPIO_8BITS: displayPinWrite( DISPLAY_PIN_D3, dataBus & 0b00001000 ); displayPinWrite( DISPLAY_PIN_D2, dataBus & 0b00000100 ); displayPinWrite( DISPLAY_PIN_D1, dataBus & 0b00000010 ); displayPinWrite( DISPLAY_PIN_D0, dataBus & 0b00000001 ); break; case DISPLAY_CONNECTION_GPIO_4BITS: if ( initial8BitCommunicationIsCompleted == true) { displayPinWrite( DISPLAY_PIN_EN, ON ); //HAL_Delay(1); systick_delay_us(DISPLAY_DEL_01US); displayPinWrite( DISPLAY_PIN_EN, OFF ); //HAL_Delay(1); systick_delay_us(DISPLAY_DEL_01US); displayPinWrite( DISPLAY_PIN_D7, dataBus & 0b00001000 ); displayPinWrite( DISPLAY_PIN_D6, dataBus & 0b00000100 ); displayPinWrite( DISPLAY_PIN_D5, dataBus & 0b00000010 ); displayPinWrite( DISPLAY_PIN_D4, dataBus & 0b00000001 ); } break; } displayPinWrite( DISPLAY_PIN_EN, ON ); //HAL_Delay(1); systick_delay_us(DISPLAY_DEL_01US); displayPinWrite( DISPLAY_PIN_EN, OFF ); //HAL_Delay(1); systick_delay_us(DISPLAY_DEL_01US); } /********************** end of file ******************************************/