adc_period_sample/src/main.c File Reference

#include <string.h>
#include <stdio.h>
#include "device/fsl_device_registers.h"
#include "fsl_debug_uart.h"
#include "fsl_gpio_hal.h"
#include "fsl_port_hal.h"
#include "fsl_pit_driver.h"
#include "fsl_adc_driver.h"
#include "fsl_interrupt_manager.h"
#include "fsl_clock_manager.h"
#include "fsl_os_abstraction.h"
#include "board.h"

Data Structures
struct	sparse_node_ptr
	Define the sparse matrix node for display wave. More...

Macros
#define	ADC_INST
#define	MAX_CONSOLE_COL
#define	NR_SAMPLES
#define	FREQ_INPUT
#define	MAX_AMPLITUDE
#define	DEBUG_UART_BAUD

Functions
static void	adc_isr_callback (void)
	ADC0 interrupt handler for fetching sample data. More...
static int32_t	init_adc (uint32_t instance)
	Initialize the ADC0 for HW trigger. More...
static void	init_pit_period (void)
	Initialize the PIT for period trigger. More...
void	sparse_reset (void)
	Reset the sparse matrix. More...
void	sparse_insert (uint32_t index, uint32_t value)
	insert a node into the sparse matrix More...
void	main (void)
	Main demo function. More...

Variables
static sync_object_t	adc_result_sync
static uint16_t	result
static sparse_node_ptr	chart_head [MAX_AMPLITUDE]
static sparse_node_t	chart_nodes [NR_SAMPLES]
static uint32_t	free_node

---

Data Structure Documentation

struct sparse_node_t

Data Fields
struct sparse_node *	next	next node
uint32_t	value	the sample index

Macro Definition Documentation

#define ADC_INST

ADC instance

#define DEBUG_UART_BAUD

debug uart baudrate

#define FREQ_INPUT

input signal frequency, defult: 50HZ

#define MAX_AMPLITUDE

print chart for the sampled data

#define MAX_CONSOLE_COL

the console max column size

#define NR_SAMPLES

number of samples in one period

Function Documentation

static void adc_isr_callback ( void  )

static

static int32_t init_adc ( uint32_t  instance )

static

Parameters

instance

The ADC instance number

static void init_pit_period ( void  )

static

void main

(

void

)

void sparse_insert	(	uint32_t	index,
		uint32_t	value
	)

Parameters

index	The amplitude index
value	The sample count value

void sparse_reset

(

void

)

Variable Documentation

sync_object_t adc_result_sync

static

sync object for adc convert result

sparse_node_ptr chart_head[MAX_AMPLITUDE]

static

sparse matrix head

sparse_node_t chart_nodes[NR_SAMPLES]

static

sparse matrix nodes

uint32_t free_node

static

free node slot index for chart_nodes[]

uint16_t result

static

result from ADC Rn