ADC temperature sensor example for SAM.

#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "asf.h"
#include "conf_board.h"

Macros
#define	BUFFER_SIZE (100)
	Size of the receive buffer and transmit buffer. More...

#define	STRING_EOL "\r"
	The maximal digital value. More...

#define	STRING_HEADER

#define	VOLT_REF (3300)
	Reference voltage for ADC,in mv. More...

Functions
void	ADC_Handler (void)
	ADC interrupt handler. More...

static uint32_t	adc_read_buffer (Adc pADC, int16_t pwBuffer, uint32_t dwSize)
	Read converted data through PDC channel. More...

static void	configure_console (void)
	Configure UART console. More...

int	main (void)
	adc_temp_sensor Application entry point. More...

static void	print_temp (float temp)
	Simple function to replace printf with float formatting. More...

void	SysTick_Handler (void)
	Systick handler, start new conversion. More...

Variables
static int16_t	gs_s_adc_values [BUFFER_SIZE] = { 0 }
	adc buffer More...

#define BUFFER_SIZE (100)

Size of the receive buffer and transmit buffer.

Referenced by ADC_Handler(), and main().

#define STRING_EOL "\r"

The maximal digital value.

#define STRING_HEADER

Value:

"-- ADC Temperature Sensor Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

#define VOLT_REF (3300)

Reference voltage for ADC,in mv.

Referenced by ADC_Handler().

void ADC_Handler ( void )

ADC interrupt handler.

References adc_get_status(), adc_read_buffer(), BUFFER_SIZE, gs_s_adc_values, MAX_DIGITAL, print_temp(), and VOLT_REF.

static uint32_t adc_read_buffer	(	Adc *	pADC,
		int16_t *	pwBuffer,
		uint32_t	dwSize
	)

static

Read converted data through PDC channel.

Parameters

pADC	The pointer of adc peripheral.
pwBuffer	The destination buffer.
dwSize	The size of the buffer.

Referenced by ADC_Handler(), main(), and start_adc().

static void configure_console ( void )

static

Configure UART console.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_PARITY, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

int main ( void )

adc_temp_sensor Application entry point.

Initialize adc to 12-bit, enable channel 15,turn on temp sensor, pdc channel interrupt for temp sensor and start conversion.

Returns: Unused (ANSI-C compatibility).

References adc_enable_channel(), adc_enable_interrupt(), adc_read_buffer(), adc_start(), ADC_TRIG_SW, board_init(), BUFFER_SIZE, configure_console(), gs_s_adc_values, pmc_enable_periph_clk(), SAM4C, SAM4CM, STRING_HEADER, sysclk_get_cpu_hz(), and sysclk_init().

static void print_temp ( float temp )

static

Simple function to replace printf with float formatting.

One decimal with rounding support.

References Assert.

Referenced by ADC_Handler().

void SysTick_Handler ( void )

Systick handler, start new conversion.

References adc_get_status(), and adc_start().

int16_t gs_s_adc_values[BUFFER_SIZE] = { 0 }

static

adc buffer

Referenced by ADC_Handler(), and main().

Microchip® Advanced Software Framework

Macros

Functions

Variables