GFX task for the FreeRTOS Web/DSP Demo.

#include "task_demo.h"
#include "arm_math.h"
#include "logo_atmel.h"
#include <FreeRTOS.h>
#include <StackMacros.h>
#include <croutine.h>
#include <list.h>
#include <mpu_wrappers.h>
#include <portable.h>
#include <projdefs.h>
#include <queue.h>
#include <semphr.h>
#include <task.h>
#include <timers.h>
#include <pmc.h>
#include <sysclk.h>
#include "ili93xx.h"
#include "ili9325_regs.h"
#include "ili9341_regs.h"
#include "aat31xx.h"
#include "pio_handler.h"
#include "smc.h"
#include "ethernet_sam.h"
#include "timer_mgt_sam.h"
#include "rtouch.h"

Data Structures
struct	bmpfile_header
	BMP (Windows) Header Format. More...

Macros
#define	BUTTON_DETECT_Y 160
	The Y value to determine which button is pressed. More...

#define	COLOR_CUSTOM_GREY 0xE4E4E4u

#define	ILI93XX_LCD_CS 1
	Chip select number to be set. More...

#define	IRQ_PRIOR_PIO 9
	IRQ priority for PIO (The lower the value, the greater the priority) More...

Functions
void	create_gfx_task (uint16_t stack_depth_words, unsigned portBASE_TYPE task_priority)
	Create the GFX task. More...

static void	event_handler (rtouch_event_t const *event)
	Callback called when the pen is pressed on the touchscreen. More...

static void	gfx_draw_bmpfile (const uint8_t *bmpImage)
	Draw a bitmap image. More...

static void	gfx_init (void)
	Initialize the LCD. More...

static void	gfx_refresh_mag (void)
	Refresh magnitude rendering on the LCD. More...

static void	gfx_refresh_wav (void)
	Refresh wave rendering on the LCD. More...

static void	gfx_task (void *pvParameters)
	GFX task core function. More...

Variables
uint32_t	app_hold = 1
	Hold the instructions screen and prevent other task from running. More...

static uint32_t	button1_filter_cnt = 0

static uint32_t	button2_filter_cnt = 0

int8_t	g_c_ipconfig [25]

uint32_t	g_ip_mode = 0
	IP mode: 0 unselected, 1 static, 2 dhcp. More...

xSemaphoreHandle	gfx_notification_semaphore
	GFX notification semaphore. More...

const portTickType	instructions_delay = 50UL / portTICK_RATE_MS
	Small delay to hold tasks, during instruction screen. More...

float32_t	mag_in_buffer []
	Magnitude input buffer defined in DSP task. More...

uint32_t	mag_in_buffer_int []
	Magnitude buffer converted in float. More...

static const portTickType	max_block_time_ticks = 1UL / portTICK_RATE_MS

static const portTickType	presentation_delay = 2000UL / portTICK_RATE_MS

static const portTickType	touch_delay = 10UL / portTICK_RATE_MS

static uint32_t	touch_sel = 0

float32_t	wav_in_buffer []
	Wave input buffer defined in DSP task. More...

#define BUTTON_DETECT_Y 160

The Y value to determine which button is pressed.

Referenced by event_handler().

#define COLOR_CUSTOM_GREY 0xE4E4E4u

Referenced by event_handler(), and gfx_task().

#define ILI93XX_LCD_CS 1

Chip select number to be set.

#define IRQ_PRIOR_PIO 9

IRQ priority for PIO (The lower the value, the greater the priority)

Referenced by gfx_task().

void create_gfx_task	(	uint16_t	stack_depth_words,
		unsigned portBASE_TYPE	task_priority
	)

Create the GFX task.

Parameters

stack_depth_words	Task stack size in 32 bits word.
task_priority	Task priority.

Initialize display.

Create the task as described above.

Referenced by main().

static void event_handler ( rtouch_event_t const * event )

static

Callback called when the pen is pressed on the touchscreen.

Parameters

x	horizontal position (in pixel if ts calibrated).
y	vertical position (in pixel if ts calibrated).

If released, freeze buttons and perform IP settings.

References BUTTON_DETECT_Y, COLOR_BLACK, COLOR_CUSTOM_GREY, COLOR_GRAY, COLOR_LIGHTGREY, g_ip_mode, ili93xx_draw_filled_rectangle(), ili93xx_draw_rectangle(), ili93xx_draw_string(), ili93xx_set_foreground_color(), RTOUCH_MOVE, RTOUCH_PRESS, and RTOUCH_RELEASE.

Referenced by gfx_task().

static void gfx_draw_bmpfile ( const uint8_t * bmpImage )

static

Draw a bitmap image.

Expected file format is 320x240, 24 bits, RGB888.

Parameters

bmpImage Pointer to the bmp file image.

References DEVICE_TYPE_ILI9325, DEVICE_TYPE_ILI9341, bmpfile_header::height, ILI9325_GRAM_DATA_REG, ILI9341_CMD_MEMORY_WRITE, ILI9341_CMD_WRITE_MEMORY_CONTINUE, ili93xx_device_type(), ili93xx_set_cursor_position(), ili93xx_set_window(), offset, and bmpfile_header::width.

Referenced by gfx_task().

static void gfx_init ( void )

static

Initialize the LCD.

Enable peripheral clock

Configure SMC interface for Lcd

Initialize display parameter

Initialize LCD

Referenced by create_gfx_task().

static void gfx_refresh_mag ( void )

static

Refresh magnitude rendering on the LCD.

Clear previous magnitude drawing.

Refresh FFT MAG display.

Limit to 99, even if we got 128 magnitudes to display. Bins are printed using col, incremented by mean of 2 to keep a clean rendering. Hence we cannot render all the magnitudes, because of the screen width. It would require a 128*2 space.

References COLOR_RED, COLOR_WHITE, ili93xx_draw_filled_rectangle(), ili93xx_draw_line(), ili93xx_set_foreground_color(), and mag_in_buffer_int.

Referenced by gfx_task().

static void gfx_refresh_wav ( void )

static

Refresh wave rendering on the LCD.

Clear previous wave drawing.

Draw wave with available data.

Limit to 398, ie. ~200 to fit the rendering frame.

References COLOR_BLACK, COLOR_BLUE, COLOR_WHITE, ili93xx_draw_filled_rectangle(), ili93xx_draw_line(), ili93xx_draw_pixel(), ili93xx_set_foreground_color(), and wav_in_buffer.

Referenced by gfx_task().

static void gfx_task ( void * pvParameters )

static

GFX task core function.

Parameters

pvParameters Junk parameter.

Initialize touchscreen with default calibration

Draw IP config menu.

Button 1.

Button 2.

Bring up the ethernet interface & initializes timer0, channel0

Wait for IP to be configured. Done in LwIP.

Show configured IP and unlock all other waiting tasks.

Draw application context.

GFX task Loop.

Wait for DSP task processing to complete.

Display sampled signal

Refresh magnitude

References AAT31XX_MAX_BACKLIGHT_LEVEL, AAT31XX_MIN_BACKLIGHT_LEVEL, aat31xx_set_backlight(), app_hold, COLOR_BLACK, COLOR_CUSTOM_GREY, COLOR_LIGHTGREY, COLOR_WHITE, event_handler(), g_c_ipconfig, g_ip_mode, gfx_draw_bmpfile(), gfx_refresh_mag(), gfx_refresh_wav(), ili93xx_display_on(), ili93xx_draw_filled_rectangle(), ili93xx_draw_line(), ili93xx_draw_rectangle(), ili93xx_draw_string(), ILI93XX_LCD_HEIGHT, ILI93XX_LCD_WIDTH, ili93xx_set_cursor_position(), ili93xx_set_foreground_color(), init_ethernet(), IRQ_PRIOR_PIO, logo_atmel_bmp, max_block_time_ticks, pmc_enable_periph_clk(), presentation_delay, rtouch_enable(), rtouch_init(), rtouch_is_pressed, rtouch_process(), rtouch_set_calibration_parameter(), rtouch_set_event_handler(), touch_delay, UNUSED, vTaskDelay(), and xSemaphoreTake.

Referenced by create_gfx_task().

uint32_t app_hold = 1

Hold the instructions screen and prevent other task from running.

Used to block the application on instruction screen.

Referenced by gfx_task().

uint32_t button1_filter_cnt = 0

static

uint32_t button2_filter_cnt = 0

static

int8_t g_c_ipconfig[25]

uint32_t g_ip_mode = 0

IP mode: 0 unselected, 1 static, 2 dhcp.

xSemaphoreHandle gfx_notification_semaphore

GFX notification semaphore.

Triggered from DSP task.

const portTickType instructions_delay = 50UL / portTICK_RATE_MS

Small delay to hold tasks, during instruction screen.

float32_t mag_in_buffer[]

Magnitude input buffer defined in DSP task.

Referenced by dsp_task().

uint32_t mag_in_buffer_int[]

Magnitude buffer converted in float.

const portTickType max_block_time_ticks = 1UL / portTICK_RATE_MS

static

Referenced by gfx_task().

const portTickType presentation_delay = 2000UL / portTICK_RATE_MS

static

Referenced by gfx_task().

const portTickType touch_delay = 10UL / portTICK_RATE_MS

static

Referenced by gfx_task().

uint32_t touch_sel = 0

static

float32_t wav_in_buffer[]

Wave input buffer defined in DSP task.

Referenced by dsp_sin_input(), dsp_task(), and gfx_refresh_wav().

Microchip® Advanced Software Framework

Data Structures

Macros

Functions

Variables