參數(shù)資料
型號： DC956A
廠商： Linear Technology
文件頁數(shù)： 29/40頁
文件大小： 0K
描述： BOARD DELTA SIGMA ADC LTC2485
軟件下載： QuikEval System
設(shè)計資源： DC956A Design File
DC956A Schematic
標準包裝： 1
系列： Easy Drive™, QuikEval™
ADC 的數(shù)量： 1
位數(shù)： 24
采樣率（每秒）： 6.8
數(shù)據(jù)接口： I²C，串行
工作溫度： 0°C ~ 70°C
已用 IC / 零件： LTC2485
已供物品： 板
相關(guān)產(chǎn)品： LTC2485CDD#TRPBF-ND - IC ADC 24BIT I2C 10-DFN
LTC2485IDD#TRPBF-ND - IC ADC 24BIT I2C 10-DFN
LTC2485IDD#PBF-ND - IC ADC 24BIT I2C 10-DFN
LTC2485CDD#PBF-ND - IC ADC 24BIT I2C 10-DFN
LTC2485
35
2485fc
APPLICATIONS INFORMATION
/*
LTC2485.c
Basic voltmeter test program for LTC2485
Reads LTC2485, converts result to volts,
and prints voltage to a 2 line by 16 character LCD display.
Mark Thoren
Linear Technology Corporation
June 23, 2005
Written for CCS PCM compiler, Version 3.182
*/
#include “LTC248X.h”
/*** read_LTC2485() ************************************************************
This is the function that actually does all the work of talking to the LTC2485.
Arguments:
addr - device address
cong - conguration bits for next conversion
Returns:
zero if conversion is in progress,
32 bit signed integer LTC2485 output word.
the i2c_xxxx() functions do the following:
void i2c_start(void): generate an i2c start or repeat start condition
void i2c_stop(void): generate an i2c stop condition
char i2c_read(boolean): return 8 bit i2c data while generating an ack or nack
boolean i2c_write(): send 8 bit i2c data and return ack or nack from slave device
These functions are very compiler specic, and can use either a hardware i2c
port or software emulation of an i2c port. This example uses software emulation.
A good starting point when porting to other processors is to write your own
i2c functions. Note that each processor has its own way of conguring
the i2c port, and different compilers may or may not have built-in functions
for the i2c port.
When in doubt, you can always write a “bit bang” function for troubleshooting
purposes.
The “fourbytes” structure allows byte access to the 32 bit return value:
struct fourbytes
// Dene structure of four consecutive bytes
{
// To allow byte access to a 32 bit int or oat.
int8 te0;
//
int8 te1;
// The make32() function in this compiler will
int8 te2;
// also work, but a union of 4 bytes and a 32 bit int
int8 te3;
// is probably more portable.
};
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