/* simple contents generator */
static char doGet(struct args_t *args) {
rflpc_gpio_set_pin_mode_output(MBED_DIP23, 1);
rflpc_gpio_set_pin_mode_output(MBED_DIP24, 1);
rflpc_gpio_set_pin_mode_output(MBED_DIP25, 1);
switch(args->color){
case 0:
rflpc_gpio_set_pin(MBED_DIP23);
rflpc_gpio_set_pin(MBED_DIP24);
rflpc_gpio_set_pin(MBED_DIP25);
rflpc_led_set(RFLPC_LED_1);
break;
case 1:
rflpc_gpio_clr_pin(MBED_DIP23);
break;
case 2:
rflpc_gpio_clr_pin(MBED_DIP24);;
break;
case 3:
rflpc_gpio_clr_pin(MBED_DIP25);
rflpc_led_set(RFLPC_LED_4);
break;
}
return 1;
}
static void _lcd_single_data(uint8_t data)
{
rflpc_gpio_set_pin(_a0_pin);
rflpc_gpio_clr_pin(_cs_pin);
rflpc_spi_write(_spi_port, data);
while (!rflpc_spi_idle(_spi_port));
rflpc_gpio_set_pin(_cs_pin);
}
static void _lcd_multiple_data(uint8_t *data, uint16_t size)
{
rflpc_gpio_set_pin(_a0_pin);
rflpc_gpio_clr_pin(_cs_pin);
while (size--)
rflpc_spi_write(_spi_port, *data++);
while (!rflpc_spi_idle(_spi_port));
rflpc_gpio_set_pin(_cs_pin);
}
static void _lcd_cmd(uint8_t cmd)
{
rflpc_gpio_clr_pin(_a0_pin);
rflpc_gpio_clr_pin(_cs_pin);
rflpc_spi_write(_spi_port, cmd);
/* Wait for command to be send */
while (! rflpc_spi_idle(_spi_port));
rflpc_gpio_set_pin(_cs_pin);
}
/*fonction executee a chaque top d'horloge'*/
static void handler(){
/*on change l'etat de cpt qui correspond a si on allume ou si l'on eteint la led*/
cpt = !cpt;
/*Si le compteur est a vrai, on allume la LED*/
if (cpt)
rflpc_gpio_set_pin(RFLPC_PIN_P0_10);
/*Si le compteur est a faux, on eteint la LED*/
else
rflpc_gpio_clr_pin(RFLPC_PIN_P0_10);
}
void nhd_spi_lcd_init(nhd_display_size_t display_size, rflpc_pin_t reset_pin, rflpc_pin_t a0, rflpc_pin_t cs, rflpc_spi_t port)
{
_reset_pin = reset_pin;
_a0_pin = a0;
_spi_port = port;
_cs_pin = cs;
_display_size = display_size;
/* Inits SPI port */
/* The LCD needs a falling edge first clock and expect transmission to start at the edge, not prior */
rflpc_spi_init(_spi_port, RFLPC_SPI_MASTER, RFLPC_CCLK, 8, _get_pre_scale_value(), 2, RFLPC_SPI_CPOL_FALLING_EDGE | RFLPC_SPI_CPHA_PHASE_FIRST_EDGE);
/* The application board is a complete mess regarding the pin connections...
They use SPI port 1 for clock and MOSI (fine) but...
They use
- p6 for reset which is... MISO of SPI1 (not that bad, but strange anyway)
- p11 for SPI CS which is the hardware controled CS of SPI port... 0 ! bingo (grrrrrr). This will force us
to manage CS by hand... pffff
*/
/* Inits GPIO pins */
rflpc_gpio_set_pin_mode_output(_reset_pin, 1);
rflpc_gpio_set_pin_mode_output(_a0_pin, 0);
rflpc_gpio_set_pin_mode_output(_cs_pin, 1);
/* Perform a reset, reset is active on low */
rflpc_gpio_clr_pin(_reset_pin);
RFLPC_DELAY_MICROSECS(100); /* trigger reset, must be low for at least 1 µs, use 10 µs to be sure (ST7565R datasheet, p65) */
rflpc_gpio_set_pin(_reset_pin);
RFLPC_DELAY_MICROSECS(100); /* Reset time is 1 µs max. Wait for 10 to be sure */
/* After hard reset (i.e. with the reset pin, what we just did), the controler is in the following state:
1. Display OFF
2. Normal display
3. ADC select: Normal (ADC command D0 = “L”)
4. Power control register: (D2, D1, D0) = (0, 0, 0)
5. 4-line SPI interface internal register data clear
6. LCD power supply bias rate:
1/65 DUTY = 1/9 bias
1/49,1/55,1/53 DUTY = 1/8 bias
1/33 DUTY = 1/6 bias
7. Power saving clear
8. V0 voltage regulator internal resistors Ra and Rb separation
9. Output conditions of SEG and COM terminals
SEG=VSS, COM=VSS
10. Read modify write OFF
11. Display start line set to first line
12. Column address set to Address 0
13. Page address set to Page 0
14. Common output status normal
15. V0 voltage regulator internal resistor ratio set mode clear
16. Electronic volume register set mode clear Electronic volume register :
(D5, D4, D3, D2, D1, D0) = (1, 0. 0, 0, 0,0)
17. Test mode clear
*/
LCD_TURN_OFF();
_lcd_cmd(0x22); /* Internal voltage regulator resistance ratio set to have 4V V0 */
_lcd_cmd(0xc8); /* reverse column fill direction. With this setting, fill is from left to right */
LCD_POWER_MODE(1,1,1); /* booster on, regulator on, follower on */
LCD_TURN_ON();
LCD_ALL_PIXELS_OFF();
LCD_START_PAGE(0);
}
