Abe Takumi
/
SCP1000
Important changes to repositories hosted on mbed.com
Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.
To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.
It is also possible to export all your personal repositories from the account settings page.
Fork of
SCP1000
by 
Kenneth Adams
SCP1000.cpp@7:61d2e698d988, 2010-10-08 (annotated)
- Committer:
- kadams6
- Date:
- Fri Oct 08 17:39:06 2010 +0000
- Revision:
- 7:61d2e698d988
- Parent:
- 6:70e36f2da425
- Child:
- 8:1049590388b6
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| kadams6 | 6:70e36f2da425 | 1 | /** \file |
| kadams6 | 7:61d2e698d988 | 2 | SCP1000 source file |
| kadams6 | 6:70e36f2da425 | 3 | */ |
| kadams6 | 6:70e36f2da425 | 4 | |
| kadams6 | 4:295e118b6e85 | 5 | #include "SCP1000.h" |
| kadams6 | 4:295e118b6e85 | 6 | |
| kadams6 | 5:8e06eb237dd2 | 7 | SCP1000::SCP1000(PinName mosi, PinName miso, PinName sclk, PinName cs) |
| kadams6 | 4:295e118b6e85 | 8 | : m_spi(mosi, miso, sclk) |
| kadams6 | 4:295e118b6e85 | 9 | , m_cs(cs) { |
| kadams6 | 4:295e118b6e85 | 10 | m_cs=1; |
| kadams6 | 4:295e118b6e85 | 11 | m_spi.frequency(500000); // the fastest of the sensor |
| kadams6 | 4:295e118b6e85 | 12 | m_spi.format(8, 0); // duda son dos palabras de 8 bits? |
| kadams6 | 4:295e118b6e85 | 13 | wait(0.5); |
| kadams6 | 4:295e118b6e85 | 14 | //------------------------------------------------ |
| kadams6 | 4:295e118b6e85 | 15 | // pc.printf("RESET\r\n"); |
| kadams6 | 4:295e118b6e85 | 16 | write_register(0x06,0x01); |
| kadams6 | 4:295e118b6e85 | 17 | wait(0.5); |
| kadams6 | 4:295e118b6e85 | 18 | |
| kadams6 | 4:295e118b6e85 | 19 | // pc.printf("Initialize High Resolution Constant Reading Mode\r\n"); |
| kadams6 | 4:295e118b6e85 | 20 | write_register(0x03,0x0A); |
| kadams6 | 4:295e118b6e85 | 21 | wait(0.5); |
| kadams6 | 4:295e118b6e85 | 22 | } |
| kadams6 | 4:295e118b6e85 | 23 | |
| kadams6 | 4:295e118b6e85 | 24 | unsigned long SCP1000::readPressure() { |
| kadams6 | 4:295e118b6e85 | 25 | unsigned long pressure_msb = read_register(PRESSURE); |
| kadams6 | 4:295e118b6e85 | 26 | pressure_msb &= 0x07; |
| kadams6 | 4:295e118b6e85 | 27 | unsigned long pressure_lsb = read_register16(PRESSURE_LSB); |
| kadams6 | 4:295e118b6e85 | 28 | unsigned long pressure = ((pressure_msb<<16)| pressure_lsb); |
| kadams6 | 4:295e118b6e85 | 29 | pressure /= 4; |
| kadams6 | 4:295e118b6e85 | 30 | |
| kadams6 | 4:295e118b6e85 | 31 | return pressure; |
| kadams6 | 4:295e118b6e85 | 32 | } |
| kadams6 | 4:295e118b6e85 | 33 | |
| kadams6 | 4:295e118b6e85 | 34 | float SCP1000::readTemperature() { |
| kadams6 | 4:295e118b6e85 | 35 | float temp_in = read_register16(TEMP); |
| kadams6 | 4:295e118b6e85 | 36 | temp_in /= 20; |
| kadams6 | 4:295e118b6e85 | 37 | return temp_in; |
| kadams6 | 4:295e118b6e85 | 38 | } |
| kadams6 | 4:295e118b6e85 | 39 | |
| kadams6 | 4:295e118b6e85 | 40 | char SCP1000::read_register(char register_name) { |
| kadams6 | 4:295e118b6e85 | 41 | register_name <<=2; |
| kadams6 | 4:295e118b6e85 | 42 | register_name &= 0xFC; |
| kadams6 | 4:295e118b6e85 | 43 | m_cs=0; //Select SPI device |
| kadams6 | 4:295e118b6e85 | 44 | m_spi.write(register_name); //Send register location |
| kadams6 | 4:295e118b6e85 | 45 | char register_value=m_spi.write(0x00); |
| kadams6 | 4:295e118b6e85 | 46 | m_cs=1; |
| kadams6 | 4:295e118b6e85 | 47 | return register_value; |
| kadams6 | 4:295e118b6e85 | 48 | } |
| kadams6 | 4:295e118b6e85 | 49 | |
| kadams6 | 4:295e118b6e85 | 50 | void SCP1000::write_register(char register_name, char register_value) { |
| kadams6 | 4:295e118b6e85 | 51 | register_name <<= 2; |
| kadams6 | 4:295e118b6e85 | 52 | register_name |= 0x02; //le estamos diciendo que escriba |
| kadams6 | 4:295e118b6e85 | 53 | m_cs=0; //Select SPI device |
| kadams6 | 4:295e118b6e85 | 54 | m_spi.write(register_name); //Send register location |
| kadams6 | 4:295e118b6e85 | 55 | m_spi.write(register_value); //Send value to record into register |
| kadams6 | 4:295e118b6e85 | 56 | m_cs=1; |
| kadams6 | 4:295e118b6e85 | 57 | } |
| kadams6 | 4:295e118b6e85 | 58 | |
| kadams6 | 4:295e118b6e85 | 59 | float SCP1000::read_register16(char register_name) { |
| kadams6 | 4:295e118b6e85 | 60 | register_name <<= 2; |
| kadams6 | 4:295e118b6e85 | 61 | register_name &= 0xFC; //Read command |
| kadams6 | 4:295e118b6e85 | 62 | m_cs=0; //Select SPI Device |
| kadams6 | 4:295e118b6e85 | 63 | m_spi.write(register_name); //Write byte to device |
| kadams6 | 4:295e118b6e85 | 64 | int in_byte1 = m_spi.write(0x00); |
| kadams6 | 4:295e118b6e85 | 65 | int in_byte2 = m_spi.write(0x00); |
| kadams6 | 4:295e118b6e85 | 66 | m_cs=1; |
| kadams6 | 4:295e118b6e85 | 67 | float in_word= (in_byte1<<=8) | (in_byte2); |
| kadams6 | 4:295e118b6e85 | 68 | return(in_word); |
| kadams6 | 4:295e118b6e85 | 69 | } |