void hd44780_init(struct dev_hd44780_ctx *a_disp) {
uint8_t x = HD44780_DATALINES;
GPIO_CONFIGURE_AS_OUTPUT(&a_disp->rs);
GPIO_CONFIGURE_AS_OUTPUT(&a_disp->e);
#if HD44780_USE_RW_LINE == 1
GPIO_CONFIGURE_AS_OUTPUT(&a_disp->rw);
GPIO_SET_LOW(&a_disp->rw);
#endif
// set control lines low
GPIO_SET_LOW(&a_disp->rs);
GPIO_SET_LOW(&a_disp->e);
// set all data lines high
while (x--) {
GPIO_CONFIGURE_AS_OUTPUT(&a_disp->data[x]);
GPIO_SET_HIGH(&a_disp->data[x]);
}
// wait for the display
_delay_ms(HD44780_RESET_DELAY_MS);
#if HD44780_8BIT_MODE == 1
GPIO_SET_LOW(&a_disp->data[7]);
GPIO_SET_LOW(&a_disp->data[6]);
#else
GPIO_SET_LOW(&a_disp->data[3]);
GPIO_SET_LOW(&a_disp->data[2]);
#endif
_hd44780_data_latch(a_disp);
_delay_ms(5);
_hd44780_data_latch(a_disp);
_delay_us(100);
#if HD44780_8BIT_MODE == 0
GPIO_SET_LOW(&a_disp->data[0]);
#endif
_hd44780_data_latch(a_disp);
// wait for a while before sending the "real" commands
_delay_us(10);
// set font and display lines
#if HD44780_8BIT_MODE == 1
hd44780_cmd(a_disp, HD44780_CMD_FUNCTION_SET(1, (a_disp->lines >= 2), a_disp->font));
#else
hd44780_cmd(a_disp, HD44780_CMD_FUNCTION_SET(0, (a_disp->lines >= 2), a_disp->font));
#endif
// display on, cursor off, blink off
hd44780_cmd(a_disp, HD44780_CMD_DISPLAY_CONTROL(1, 0, 0));
// clear the screen
hd44780_clrscr(a_disp);
// set entry mode
hd44780_cmd(a_disp, HD44780_CMD_ENTRY_MODE(1, 0));
}
//*****************************************************************************
//
//! \brief Init the HD44780 LCD Device.
//!
//! \param None.
//!
//! This function is used to Init the HD44780 Device. It must be call before
//! any other LCD function use.
//!
//! It Open the pins's GPIO peripheral port, and config the pins type to GPIO
//! output. Then config the LCD into the default state, clear the LCD and
//! Open the display. Default A Blink cursor is set on. The LCD cursor move
//! direction is config as increment default.
//!
//! The HD44780 Initial state can be determined by the \ref HD44780_Config.
//! - Pins that used is determined by \ref HD44780_Config_Pins.
//! - The inteface data length is determined by \ref HD44780_INTERFACE_DATA_LEN.
//! - The LCD display line is determined by \ref HD44780_DISPLAY_LINE.
//! - The LCD character font is determined by \ref HD44780_CHARACTER_FONT.
//! .
//!
//! \return None.
//
//*****************************************************************************
void
HD44780Init(void)
{
ucDisplayFunction = (HD44780_INTERFACE_DATA_LEN |
HD44780_FUNCTION_SET_N_2 |
HD44780_CHARACTER_FONT);
ucRsPin = 1;
ucRwPin = 255;
ucEnablePin = 2;
ucDataPin[0] = 6;
ucDataPin[1] = 5;
ucDataPin[2] = 4;
ucDataPin[3] = 3;
_SPIbuff = 0;
xSysCtlPeripheralEnable(xGPIOSPinToPeripheralId(HD44780_PIN_CS));
xSysCtlPeripheralEnable(xGPIOSPinToPeripheralId(HD44780_PIN_CLK));
xSysCtlPeripheralEnable(xGPIOSPinToPeripheralId(HD44780_PIN_MOSI));
#if HD44780_SPI_MODE == SPIMODE_HARDWARE
//
// Enable Peripheral SPI1
//
xSysCtlPeripheralEnable2(HD44780_SPI);
SysCtlPeripheralEnable(SYSCTL_PERIPH_AFIO);
//
// Configure Some GPIO pins as SPI Mode SPI MISO is no use in LCD4884
//
xSPinTypeSPI(HD44780_CLK,HD44780_PIN_CLK);
xSPinTypeSPI(HD44780_MOSI,HD44780_PIN_MOSI);
xGPIOSPinTypeGPIOOutput(HD44780_PIN_CS);
//
// Configure SPI SPI1,ulRate
//
xSPIConfigSet((HD44780_SPI), HD44780_SPI_BAUDRATE,
SPI_FORMAT_MODE_3 | SPI_DATA_WIDTH8 | SPI_MSB_FIRST | SPI_MODE_MASTER);
//
//! \note Enanble SPI SS,test on M0516LBN.other mcu there may need modify.
//
xSPISSSet((HD44780_SPI), xSPI_SS_SOFTWARE, xSPI_SS0);
xSPIEnable(HD44780_SPI);
#else
//
// Set Pins Type to GPIO Output
//
xGPIOSPinTypeGPIOOutput(HD44780_PIN_CS);
xGPIOSPinTypeGPIOOutput(HD44780_PIN_CLK);
xGPIOSPinTypeGPIOOutput(HD44780_PIN_MOSI);
#endif
//
// Output default value : E disable
//
//
// Set Entry Mode: Interface Data Length, Character Font, Display Line
//
while(HD44780Busy());
HD44780WriteCmd(HD44780_CMD_FUNCTION_SET(HD44780_INTERFACE_DATA_LEN |
HD44780_FUNCTION_SET_N_2 |
HD44780_CHARACTER_FONT));
//
// Display on & Cursor Blink
//
while(HD44780Busy());
HD44780WriteCmd(HD44780_CMD_DISPLAY_CTRL(HD44780_DISPLAY_CTRL_D |
0 |
HD44780_DISPLAY_CTRL_B));
//
// Clear LCD
//
while(HD44780Busy());
HD44780WriteCmd(HD44780_CMD_CLS);
//
// Cursor Move Mode: Increment
//
while(HD44780Busy());
HD44780WriteCmd(HD44780_CMD_ENTRY_MODE_SET(HD44780_ENTRY_MODE_SET_ID_INC |
0));
}