/**
* \brief SPI command
*
* \param register_index The Register Index as SPI command to COG
* \param register_data The Register Data for sending command data to COG
*/
void epd_spi_send_byte (uint8_t register_index, uint8_t register_data) {
EPD_cs_low ();
epd_spi_write (0x70); // header of Register Index
epd_spi_write (register_index);
EPD_cs_high ();
Wait_10us ();
EPD_cs_low ();
epd_spi_write (0x72); // header of Register Data
epd_spi_write (register_data);
EPD_cs_high ();
}
/**
* \brief Initialize the EPD hardware setting
*/
void EPD_init(void) {
EPD_display_hardware_init();
EPD_cs_low();
EPD_rst_low();
EPD_discharge_low();
EPD_border_low();
}
/**
* \brief SPI command if register data is larger than two bytes
*
* \param register_index The Register Index as SPI command to COG
* \param register_data The Register Data for sending command data to COG
* \param length The number of bytes of Register Data which depends on which
* Register Index is selected.
*/
void epd_spi_send (unsigned char register_index, unsigned char *register_data,
unsigned length) {
EPD_cs_low ();
epd_spi_write (0x70); // header of Register Index
epd_spi_write (register_index);
EPD_cs_high ();
Wait_10us ();
EPD_cs_low ();
epd_spi_write (0x72); // header of Register Data of write command
while(length--) {
epd_spi_write (*register_data++);
}
EPD_cs_high ();
}
/**
* \brief SPI command
*
* \param Register The Register Index as SPI Data to COG
* \param Data The Register Data for sending command data to COG
* \return the SPI read value
*/
uint8_t SPI_R(uint8_t Register, uint8_t Data) {
uint8_t result;
EPD_cs_low ();
epd_spi_write (0x70); // header of Register Index
epd_spi_write (Register);
EPD_cs_high ();
Wait_10us ();
EPD_cs_low ();
epd_spi_write (0x73); // header of Register Data of read command
result=epd_spi_read (Data);
EPD_cs_high ();
return result;
}
/**
* \brief Initialize the EPD hardware setting
*/
void EPD_display_hardware_init(void) {
EPD_initialize_gpio();
EPD_Vcc_turn_off();
epd_spi_init();
initialize_temperature();
EPD_cs_low();
EPD_pwm_low();
EPD_rst_low();
EPD_discharge_low();
EPD_border_low();
//initialize_EPD_timer();
}
/**
* \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 the temperature sensor
*/
void initialize_temperature(void) {
/** not used at present */
#if 0
struct adc_config adc_cfg = {
/* System clock division factor is 16 */
.prescal = ADC_PRESCAL_DIV16,
/* The APB clock is used */
.clksel = ADC_CLKSEL_APBCLK,
/* Max speed is 150K */
.speed = ADC_SPEED_150K,
/* ADC Reference voltage is VCC/2 */
.refsel =ADC_REFSEL_4,
/* Enables the Startup time */
.start_up = CONFIG_ADC_STARTUP
};
struct adc_seq_config adc_seq_cfg = {
/* Select Vref for shift cycle */
.zoomrange = ADC_ZOOMRANGE_0,
/* Pad Ground */
.muxneg = ADC_MUXNEG_1,
/* Temperature sensor */
.muxpos = EPD_Temperature_Sensor_ADC,
/* Enables the internal voltage sources */
.internal =ADC_INTERNAL_2,
/* Disables the ADC gain error reduction */
.gcomp = ADC_GCOMP_DIS,
/* Disables the HWLA mode */
.hwla = ADC_HWLA_DIS,
.gain=ADC_GAIN_1X,
/* 12-bits resolution */
.res = ADC_RES_12_BIT,
/* Enables the single-ended mode */
.bipolar = ADC_BIPOLAR_SINGLEENDED
};
struct adc_ch_config adc_ch_cfg = {
.seq_cfg = &adc_seq_cfg,
/* Internal Timer Max Counter */
.internal_timer_max_count = 60,
/* Window monitor mode is off */
.window_mode = 0,
.low_threshold = 0,
.high_threshold = 0,
};
adc_init(&g_adc_inst, ADCIFE, &adc_cfg);
adc_enable(&g_adc_inst);
adc_ch_set_config(&g_adc_inst, &adc_ch_cfg);
adc_set_callback(&g_adc_inst, ADC_SEQ_SEOC, adcife_read_conv_result, ADCIFE_IRQn, 1);
adc_configure_trigger(&g_adc_inst,ADC_TRIG_SW);
adc_configure_gain(&g_adc_inst, ADC_GAIN_1X);
#endif
}
/**
* \brief Initialize the EPD hardware setting
*/
void EPD_display_hardware_init (void) {
EPD_initialize_gpio();
EPD_Vcc_turn_off();
epd_spi_init();
initialize_temperature();
EPD_cs_low();
EPD_pwm_low();
EPD_rst_low();
EPD_discharge_low();
EPD_border_low();
//initialize_EPD_timer();
}
/**
* \brief Set Flash_CS pin to high and EPD_CS to low
*/
void Flash_cs_high(void) {
EPD_flash_cs_high();
EPD_cs_low ();
}
