| User | Revision | Line number | New contents of line |
|---|
| joosttromp |
0:55ea30b5de1e
|
1
|
/**
|
| joosttromp |
0:55ea30b5de1e
|
2
|
* @section LICENSE
|
| joosttromp |
0:55ea30b5de1e
|
3
|
* This program is free software; you can redistribute it and/or modify
|
| joosttromp |
0:55ea30b5de1e
|
4
|
* it under the terms of the GNU General Public License as published by
|
| joosttromp |
0:55ea30b5de1e
|
5
|
* the Free Software Foundation; either version 2 of the License, or
|
| joosttromp |
0:55ea30b5de1e
|
6
|
* (at your option) any later version.
|
| joosttromp |
0:55ea30b5de1e
|
7
|
*
|
| joosttromp |
0:55ea30b5de1e
|
8
|
* This program is distributed in the hope that it will be useful, but
|
| joosttromp |
0:55ea30b5de1e
|
9
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
| joosttromp |
0:55ea30b5de1e
|
10
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
| joosttromp |
0:55ea30b5de1e
|
11
|
* for more details.
|
| joosttromp |
0:55ea30b5de1e
|
12
|
*
|
| joosttromp |
0:55ea30b5de1e
|
13
|
* You should have received a copy of the GNU General Public License along
|
| joosttromp |
0:55ea30b5de1e
|
14
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
| joosttromp |
0:55ea30b5de1e
|
15
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
| joosttromp |
0:55ea30b5de1e
|
16
|
*
|
| joosttromp |
0:55ea30b5de1e
|
17
|
* @section DESCRIPTION
|
| joosttromp |
0:55ea30b5de1e
|
18
|
* Library to interface with the SCP1000 pressure and temperature sensor.
|
| joosttromp |
0:55ea30b5de1e
|
19
|
*/
|
| joosttromp |
0:55ea30b5de1e
|
20
|
|
| joosttromp |
0:55ea30b5de1e
|
21
|
#include "SCP1000.h"
|
| joosttromp |
0:55ea30b5de1e
|
22
|
|
| joosttromp |
0:55ea30b5de1e
|
23
|
SCP1000::SCP1000(PinName mosi, PinName miso, PinName sclk, PinName cs)
|
| joosttromp |
0:55ea30b5de1e
|
24
|
: m_spi(mosi, miso, sclk)
|
| joosttromp |
0:55ea30b5de1e
|
25
|
, m_cs(cs) {
|
| joosttromp |
0:55ea30b5de1e
|
26
|
m_cs=1;
|
| joosttromp |
0:55ea30b5de1e
|
27
|
m_spi.frequency(500000); // the fastest of the sensor
|
| joosttromp |
0:55ea30b5de1e
|
28
|
m_spi.format(8, 0); // duda son dos palabras de 8 bits?
|
| joosttromp |
0:55ea30b5de1e
|
29
|
wait(0.5);
|
| joosttromp |
0:55ea30b5de1e
|
30
|
//------------------------------------------------
|
| joosttromp |
0:55ea30b5de1e
|
31
|
// pc.printf("RESET\r\n");
|
| joosttromp |
0:55ea30b5de1e
|
32
|
write_register(0x06,0x01);
|
| joosttromp |
0:55ea30b5de1e
|
33
|
wait(0.5);
|
| joosttromp |
0:55ea30b5de1e
|
34
|
|
| joosttromp |
0:55ea30b5de1e
|
35
|
// pc.printf("Initialize High Resolution Constant Reading Mode\r\n");
|
| joosttromp |
0:55ea30b5de1e
|
36
|
write_register(0x03,0x0A);
|
| joosttromp |
0:55ea30b5de1e
|
37
|
wait(0.5);
|
| joosttromp |
0:55ea30b5de1e
|
38
|
}
|
| joosttromp |
0:55ea30b5de1e
|
39
|
|
| joosttromp |
0:55ea30b5de1e
|
40
|
unsigned long SCP1000::readPressure() {
|
| joosttromp |
0:55ea30b5de1e
|
41
|
unsigned long pressure_msb = read_register(PRESSURE);
|
| joosttromp |
0:55ea30b5de1e
|
42
|
pressure_msb &= 0x07;
|
| joosttromp |
0:55ea30b5de1e
|
43
|
unsigned long pressure_lsb = read_register16(PRESSURE_LSB);
|
| joosttromp |
0:55ea30b5de1e
|
44
|
unsigned long pressure = ((pressure_msb<<16)| pressure_lsb);
|
| joosttromp |
0:55ea30b5de1e
|
45
|
pressure /= 4;
|
| joosttromp |
0:55ea30b5de1e
|
46
|
|
| joosttromp |
0:55ea30b5de1e
|
47
|
return pressure;
|
| joosttromp |
0:55ea30b5de1e
|
48
|
}
|
| joosttromp |
0:55ea30b5de1e
|
49
|
|
| joosttromp |
0:55ea30b5de1e
|
50
|
float SCP1000::readTemperature() {
|
| joosttromp |
0:55ea30b5de1e
|
51
|
float temp_in = read_register16(TEMP);
|
| joosttromp |
0:55ea30b5de1e
|
52
|
temp_in /= 20;
|
| joosttromp |
0:55ea30b5de1e
|
53
|
return temp_in;
|
| joosttromp |
0:55ea30b5de1e
|
54
|
}
|
| joosttromp |
0:55ea30b5de1e
|
55
|
|
| joosttromp |
0:55ea30b5de1e
|
56
|
char SCP1000::read_register(char register_name) {
|
| joosttromp |
0:55ea30b5de1e
|
57
|
register_name <<=2;
|
| joosttromp |
0:55ea30b5de1e
|
58
|
register_name &= 0xFC;
|
| joosttromp |
0:55ea30b5de1e
|
59
|
m_cs=0; //Select SPI device
|
| joosttromp |
0:55ea30b5de1e
|
60
|
m_spi.write(register_name); //Send register location
|
| joosttromp |
0:55ea30b5de1e
|
61
|
char register_value=m_spi.write(0x00);
|
| joosttromp |
0:55ea30b5de1e
|
62
|
m_cs=1;
|
| joosttromp |
0:55ea30b5de1e
|
63
|
return register_value;
|
| joosttromp |
0:55ea30b5de1e
|
64
|
}
|
| joosttromp |
0:55ea30b5de1e
|
65
|
|
| joosttromp |
0:55ea30b5de1e
|
66
|
void SCP1000::write_register(char register_name, char register_value) {
|
| joosttromp |
0:55ea30b5de1e
|
67
|
register_name <<= 2;
|
| joosttromp |
0:55ea30b5de1e
|
68
|
register_name |= 0x02; //le estamos diciendo que escriba
|
| joosttromp |
0:55ea30b5de1e
|
69
|
m_cs=0; //Select SPI device
|
| joosttromp |
0:55ea30b5de1e
|
70
|
m_spi.write(register_name); //Send register location
|
| joosttromp |
0:55ea30b5de1e
|
71
|
m_spi.write(register_value); //Send value to record into register
|
| joosttromp |
0:55ea30b5de1e
|
72
|
m_cs=1;
|
| joosttromp |
0:55ea30b5de1e
|
73
|
}
|
| joosttromp |
0:55ea30b5de1e
|
74
|
|
| joosttromp |
0:55ea30b5de1e
|
75
|
float SCP1000::read_register16(char register_name) {
|
| joosttromp |
0:55ea30b5de1e
|
76
|
register_name <<= 2;
|
| joosttromp |
0:55ea30b5de1e
|
77
|
register_name &= 0xFC; //Read command
|
| joosttromp |
0:55ea30b5de1e
|
78
|
m_cs=0; //Select SPI Device
|
| joosttromp |
0:55ea30b5de1e
|
79
|
m_spi.write(register_name); //Write byte to device
|
| joosttromp |
0:55ea30b5de1e
|
80
|
int in_byte1 = m_spi.write(0x00);
|
| joosttromp |
0:55ea30b5de1e
|
81
|
int in_byte2 = m_spi.write(0x00);
|
| joosttromp |
0:55ea30b5de1e
|
82
|
m_cs=1;
|
| joosttromp |
0:55ea30b5de1e
|
83
|
float in_word= (in_byte1<<=8) | (in_byte2);
|
| joosttromp |
0:55ea30b5de1e
|
84
|
return(in_word);
|
| joosttromp |
0:55ea30b5de1e
|
85
|
} |
Joost Tromp