Silicon C8051系列 官方例程源码

C8051F35x_中文数据手册.pdf ： https://download.csdn.net/download/sudaroot/10933707

官方例程C8051xxx Examples.rar ：https://download.csdn.net/download/sudaroot/12496814

不方便下载（无积分）可私聊发。

//-----------------------------------------------------------------------------
// F35x_ADC0_Buffered.c
//-----------------------------------------------------------------------------
// Copyright 2004 Silicon Laboratories, Inc.
//
// AUTH: BD / PC / BW
// LMOD: BW 15 JUL 2004
// DATE: 06 APR 2004
//
// This program demonstrates taking measurements using the 24-bit ADC on the
// C8051F350/51 devices.
//
// Input pin configuration shown in ADC0_Init().
//
// For a Noise measurement, connect AIN0 and AIN1 to AGND at the terminal
// block.  Set "USE_FLOAT" to '1', "PRINT_STATISTICS" to '1',
// "PRINT_SAMPLES" to '0', and "PRINT_VOLTAGES" to '0'.
//
// This software configures the ADC to use an external VREF.  Therefore,
// on the 'F350 target board, J13 and J14 should have their shorting blocks
// installed.
//
// The standard deviation (Sigma) of a sample set is equivalent to the
// effective RMS noise of the conversion system.  "Sigma", when converted
// to Volts, is equivalent to the input-referred noise floor of the
// sampling system.
//
// Typical values of Sigma from the C8051F350 rev B target board with
// AIN0 and AIN1 grounded at the terminal block are around 9 to 11 LSBs
// in bipolar mode.  For a DC measurement, this is equivalent to a Signal-
// to-Noise ratio of about 117dB, or about 20 bits of effective dynamic
// range.
//
// 117dB = 20 log10 ( 11 / 2^23)
// 20 bits = 117dB / 6dB/bit
//
// Another parameter of note for integrating converters is the number of
// Noise-Free bits.  For a Gaussian-distributed noise floor, this number
// can be obtained by multiplying Sigma by 6, evaluating the number of
// bits required to contain the result, and subtracting this number of
// bits from the 24 available bits, as follows:
//
// 10 LSBs * 6 = 60 LSBs, which can be contained in 6 bits.  Noise-free
// resolution is 24bits - 6 bits = 18 bits.
//
// Refer to 'F350 datasheet tables "ADC0 Electrical Characteristics" and
// "Absolute Maximum Ratings" for the MIN/MAX voltage range on input pins.
//
// If using the eval version of the Keil compiler, set "USE_FLOAT" to '0'
// and calculate the standard deviation by taking the square root
// of "variance".
//
// Target: C8051F35x
//
// Tool chain: KEIL C51
//
// v1.0 PC 26 MAY 2004
// Initial Revision (Adapted from 'F350 Temp Sensor Demo)
//

// set USE_FLOAT to '0' to use EVAL version of Keil compiler

#define USE_FLOAT 1
#define PRINT_STATISTICS 1
#define PRINT_SAMPLES 0
#define PRINT_VOLTAGES 0

//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------
#include <c8051f350.h>                    // SFR declarations
#include <stdio.h>                        // Standard I/O Library
#include <math.h>

//-----------------------------------------------------------------------------
// 16-bit SFR Definitions for 'F35x
//-----------------------------------------------------------------------------

sfr16 DP       = 0x82;