shift_matrix_display.c File Reference

Zephyr display driver implementation for a shift matrix display. This driver start it's own thread during initialization, parameters for which are set in the kconfig. Currently the driver only supports a 3bit colour depth but supports a 16 bit interface. More...

#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/display.h>
#include <zephyr/devicetree.h>
#include <zephyr/dt-bindings/gpio/gpio.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/pwm.h>
#include <zephyr/logging/log.h>
#include <zephyr/irq.h>

Include dependency graph for shift_matrix_display.c:

Data Structures
union	pixel_1bit
struct	pixel_8bit
struct	pixel_16bit
struct	pixel_24bit
struct	display_drv_config
struct	display_drv_data

Macros
#define	MATRIX_NODE   DT_INST(0, adafruit_shift_matrix_display)
#define	X_PIXELS   DT_PROP(MATRIX_NODE, width)
#define	Y_PIXELS   DT_PROP(MATRIX_NODE, height)
#define	PIXEL_COUNT   (X_PIXELS * Y_PIXELS)
#define	NR_RGB_GPIOS   (Y_PIXELS / 16)
#define	NR_MUX_GPIOS   (Y_PIXELS / 8 )
#define	GET_GPIO_SPEC(node_id, prop, idx)    GPIO_DT_SPEC_GET_BY_IDX(node_id, prop, idx),
#define	RED_BIT_LEN   5
#define	GREEN_BIT_LEN   6
#define	BLUE_BIT_LEN   5

Typedefs
typedef struct pixel_16bit	pixel_t

Functions
	LOG_MODULE_REGISTER (shift_matrix_display, CONFIG_DISPLAY_LOG_LEVEL)
	K_SEM_DEFINE (framebuf_sem, 0, 1)
	K_SEM_DEFINE (brightness_sem, 0, 1)
	K_THREAD_STACK_DEFINE (shift_matrix_display_stack_area, CONFIG_SHIFT_MATRIX_DISPLAY_STACK_SIZE)
	DEVICE_DT_DEFINE (MATRIX_NODE, instance_init, NULL, &instance_data, &instance_config, POST_KERNEL, CONFIG_DISPLAY_INIT_PRIORITY, &driver_api)

Variables
struct k_thread	shift_matrix_display_thread_data
const struct display_driver_api	driver_api

Detailed Description

Zephyr display driver implementation for a shift matrix display. This driver start it's own thread during initialization, parameters for which are set in the kconfig. Currently the driver only supports a 3bit colour depth but supports a 16 bit interface.

Author

Theis theis.nosp@m.mejn.nosp@m.ertse.nosp@m.n@gm.nosp@m.ail.c.nosp@m.om

Date

15-09-2024

Copyright

(c) 2024 Theis Mejnertsen

License:\n This project is released under the MIT license.

Variable Documentation

driver_api

const struct display_driver_api driver_api

Initial value:

= {
    .blanking_on = api_blanking_on,
    .blanking_off = api_blanking_off,
    .write = api_write,
    .read = api_read,
    .get_framebuffer = api_get_framebuffer,
    .set_brightness = api_set_brightness,
    .set_contrast = api_set_contrast,
    .get_capabilities = api_get_capabilities,
    .set_pixel_format = api_set_pixel_format,
    .set_orientation = api_set_orientation,
}