参数资料
型号: 101-0563
厂商: Rabbit Semiconductor
文件页数: 49/154页
文件大小: 0K
描述: RCM3400 PROTO BOARD
标准包装: 1
系列: RabbitCore 3000
类型: MPU 核心模块
适用于相关产品: RCM3400
所含物品:
unsigned int anaInDriver(unsigned int cmd,
unsigned int len);
Reads the voltage of an analog input channel by serial-clocking an 8-bit command to the A/D converter
by its Direct Mode method. This function assumes that Mode1 (most significant byte first) and the A/D
converter oscillator have been enabled. See anaInConfig() for the setup.
The conversion begins immediately after the last data bit has been transferred. An exception error will
occur if Direct Mode bit D7 is not set.
PARAMETERS
cmd contains a gain code and a channel code as follows.
D7—1; D6–D4—Gain Code; D3–D0—Channel Code
Use the following calculation and the tables below to determine cmd :
cmd = 0x80 | (gain_code*16) + channel_code
Gain Code
0
1
2
3
4
5
6
7
Multiplier
×1
×2
×4
×5
×8
×10
×16
×20
Channel Code
0
1
2
3 ?
4
5
6
7*
Differential Input
Lines
+AIN0 -AIN1
+AIN2 -AIN3
+AIN4 -AIN5
+AIN6 -AIN7
-AIN0 +AIN1
-AIN2 +AIN3
-AIN4 +AIN5
-AIN6 +AIN7
Channel Code
8
9
10
11
12
13
14
15
Single-Ended
Input Lines *
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
4–20 mA
Lines
AIN0*
AIN1*
AIN2*
AIN3
AIN4
AIN5
AIN6
AIN7*
* Negative input is ground.
? Not accessible on Prototyping Board
len , the output bit length, is always 12 for 11-bit conversions
User ’s Manual
43
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