/**
Read a register
@param Reg Register to read
@return Registry Value
*/
char NRF24L01_R_ReadReg(char Reg) {
char Result;
NRF24L01_R_CS_LOW;
SPI_R(Reg);
Result = SPI_R(NOP);
NRF24L01_R_CS_HIGH;
return Result;
}
/**
Returns the STATUS register
@return STATUS Register
*/
char NRF24L01_R_Get_Status(void) {
char Result;
NRF24L01_R_CS_LOW;
SPI_R(0x07);
Result = SPI_R(NOP);
NRF24L01_R_CS_HIGH;
return Result;
}
/**
Returns the STATUS register and then modify a register
@param Reg Register to change
@param Value New value
@return STATUS Register
*/
char NRF24L01_R_WriteReg(char Reg, char Value) {
char Result;
NRF24L01_R_CS_LOW;
Result = SPI_R(Reg);
SPI_R(Value);
//PORTD.OUTSET = 1<<7;
NRF24L01_R_CS_HIGH;
return Result;
}
/**
Returns the STATUS register and then write "n" registers
@param Reg Registers to change
@param Buf Pointer to a buffer
@param Size Buffer Size
@return STATUS Register
*/
char NRF24L01_R_WriteRegBuf(char Reg, char *Buf, int Size) {
int i;
char Result;
NRF24L01_R_CS_LOW;
Result = SPI_R(Reg);
for (i = 0; i < Size; i++) {
SPI_R(Buf[i]);
}
NRF24L01_R_CS_HIGH;
return Result;
}
/**
Returns the STATUS register and then read "n" registers
@param Reg Register to read
@param Buf Pointer to a buffer
@param Size Buffer Size
@return STATUS Register
*/
char NRF24L01_R_ReadRegBuf(char Reg, char *Buf, int Size) {
int i;
char Result;
NRF24L01_R_CS_LOW;
Result = SPI_R(Reg);
for (i = 0; i < Size; i++) {
Buf[i] = SPI_R(NOP);
}
NRF24L01_R_CS_HIGH;
return Result;
}
/**
* \brief Power Off COG Driver
* \note For detailed flow and description, please refer to the COG G2 document Section 6.
*
* \param EPD_type_index The defined EPD size
*/
uint8_t EPD_power_off(uint8_t EPD_type_index) {
uint8_t y;
if(EPD_type_index==EPD_144 || EPD_type_index==EPD_200) {
border_dummy_line(EPD_type_index);
dummy_line(EPD_type_index);
}
delay_ms (25);
if(EPD_type_index==EPD_270) {
EPD_border_low();
delay_ms (200);
EPD_border_high();
}
//Check DC/DC
if((SPI_R(0x0F,0x00) & 0x40) == 0x00) return ERROR_DC;
//Turn on Latch Reset
epd_spi_send_byte (0x03, 0x01);
//Turn off OE
epd_spi_send_byte (0x02, 0x05);
//Power off charge pump Vcom
epd_spi_send_byte (0x05, 0x0E);
//Power off charge pump neg voltage
epd_spi_send_byte (0x05, 0x02);
//Turn off all charge pump
epd_spi_send_byte (0x05, 0x00);
//Turn off OSC
epd_spi_send_byte (0x07, 0x0D);
epd_spi_send_byte (0x04, 0x83);
delay_ms(120);
epd_spi_send_byte (0x04, 0x00);
epd_spi_detach ();
EPD_cs_low();
EPD_rst_low();
EPD_Vcc_turn_off ();
EPD_border_low();
delay_ms (10);
for(y=0;y<10;y++)
{
EPD_discharge_high ();
delay_ms (10);
EPD_discharge_low ();
delay_ms (10);
}
return RES_OK;
}
/**
* \brief Initialize COG Driver
* \note For detailed flow and description, please refer to the COG G2 document Section 4.
*
* \param EPD_type_index The defined EPD size
*/
uint8_t EPD_initialize_driver (uint8_t EPD_type_index) {
uint16_t i;
// Empty the Line buffer
for (i = 0; i <= LINE_BUFFER_DATA_SIZE; i ++) {
COG_Line.uint8[i] = 0x00;
}
// Determine the EPD size for driving COG
COG_driver_EPDtype_select(EPD_type_index);
// Sense temperature to determine Temperature Factor
set_temperature_factor(EPD_type_index);
i = 0;
while (EPD_IsBusy()) {
if((i++) >= 0x0FFF) return ERROR_BUSY;
}
//Check COG ID
if((SPI_R(0x72,0x00) & 0x0f) !=0x02) return ERROR_COG_ID;
//Disable OE
epd_spi_send_byte(0x02,0x40);
//Check Breakage
if((SPI_R(0x0F,0x00) & 0x80) != 0x80) return ERROR_BREAKAGE;
//Power Saving Mode
epd_spi_send_byte(0x0B, 0x02);
//Channel Select
epd_spi_send (0x01, (uint8_t *)&COG_parameters[EPD_type_index].channel_select, 8);
//High Power Mode Osc Setting
epd_spi_send_byte(0x07,0xD1);
//Power Setting
epd_spi_send_byte(0x08,0x02);
//Set Vcom level
epd_spi_send_byte(0x09,0xC2);
//Power Setting
epd_spi_send_byte(0x04,0x03);
//Driver latch on
epd_spi_send_byte(0x03,0x01);
//Driver latch off
epd_spi_send_byte(0x03,0x00);
delay_ms(5);
//Chargepump Start
i=0;
do {
//Start chargepump positive V
//VGH & VDH on
epd_spi_send_byte(0x05,0x01);
delay_ms(240);
//Start chargepump neg voltage
//VGL & VDL on
epd_spi_send_byte(0x05,0x03);
delay_ms(40);
//Set chargepump
//Vcom_Driver to ON
//Vcom_Driver on
epd_spi_send_byte(0x05,0x0F);
delay_ms(40);
//Check DC/DC
if((SPI_R(0x0F,0x00) & 0x40) != 0x00) break;
}while((i++) != 4);
if(i>=4)
{
//Output enable to disable
epd_spi_send_byte(0x02,0x40);
return ERROR_CHARGEPUMP;
}
else return RES_OK;
}
/**
Used in TX mode. Disables AUTOACK on this
specific packet.
*/
void NRF24L01_R_NOACK_TX(void)
{
NRF24L01_R_CS_LOW;
SPI_R(W_TX_PAYLOAD_NOACK);
NRF24L01_R_CS_HIGH;
}
/**
Empty the receive buffer
*/
void NRF24L01_R_Flush_RX(void) {
NRF24L01_R_CS_LOW;
SPI_R(FLUSH_RX);
NRF24L01_R_CS_HIGH;
}