ads7843_example.c File Reference

ads7843 touchscreen controller Example.

Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.

#include "asf.h"
#include "stdio_serial.h"
#include "conf_board.h"
#include "resistive_touch_board.h"
#include "rtouch_calibrate.h"

Macros
#define	IRQ_PRIOR_PIO   0
	IRQ priority for PIO (The lower the value, the greater the priority) More...
#define	STRING_EOL   "\r"
#define	STRING_HEADER

Functions
static void	configure_console (void)
	Configure the Console UART. More...
static void	event_handler (rtouch_event_t const *event)
	Callback called when the pen is pressed on the touchscreen. More...
int	main (void)
	Application entry point for spi_touchscreen example. More...
void	SysTick_Handler (void)
	Handler for SysTick interrupt. More...

Variables
static volatile uint32_t	g_ul_tick_count = 0
	Tick Counter united by ms. More...

#define IRQ_PRIOR_PIO   0

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

Referenced by main().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"-- SPI_Touchscreen Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

static void configure_console ( void  )

static

Configure the Console UART.

References uart_rs232_options::baudrate, stdio_serial_init(), and sysclk_enable_peripheral_clock().

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).

References rtouch_event_struct::panel, RTOUCH_MOVE, RTOUCH_PRESS, RTOUCH_RELEASE, rtouch_event_struct::type, rtouch_point_struct::x, and rtouch_point_struct::y.

Referenced by main().

int main

(

void

)

Application entry point for spi_touchscreen example.

Returns

Unused (ANSI-C compatibility).

References aat31xx_disable_backlight(), AAT31XX_MAX_BACKLIGHT_LEVEL, aat31xx_set_backlight(), board_init(), configure_console(), event_handler(), IRQ_PRIOR_PIO, pmc_enable_periph_clk(), rtouch_calibrate(), rtouch_enable(), rtouch_init(), rtouch_set_event_handler(), STRING_HEADER, sysclk_get_cpu_hz(), and sysclk_init().

void SysTick_Handler

(

void

)

Handler for SysTick interrupt.

Increments the timestamp counter.

References g_ul_tick_count, and rtouch_process().

volatile uint32_t g_ul_tick_count = 0

static

Tick Counter united by ms.