Port of the SHT2x example code from Sensirion
Dependents: sht21_test ENVLogger
SHT21_I2C.h@2:2464fed17980, 2011-04-23 (annotated)
- Committer:
- ssozonoff
- Date:
- Sat Apr 23 19:07:52 2011 +0000
- Revision:
- 2:2464fed17980
- Parent:
- 1:d0f691423bf1
Code cleanup
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
ssozonoff | 1:d0f691423bf1 | 1 | /* |
ssozonoff | 1:d0f691423bf1 | 2 | Copyright (c) 2010 Andy Kirkham |
ssozonoff | 1:d0f691423bf1 | 3 | |
ssozonoff | 1:d0f691423bf1 | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
ssozonoff | 1:d0f691423bf1 | 5 | of this software and associated documentation files (the "Software"), to deal |
ssozonoff | 1:d0f691423bf1 | 6 | in the Software without restriction, including without limitation the rights |
ssozonoff | 1:d0f691423bf1 | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
ssozonoff | 1:d0f691423bf1 | 8 | copies of the Software, and to permit persons to whom the Software is |
ssozonoff | 1:d0f691423bf1 | 9 | furnished to do so, subject to the following conditions: |
ssozonoff | 1:d0f691423bf1 | 10 | |
ssozonoff | 1:d0f691423bf1 | 11 | The above copyright notice and this permission notice shall be included in |
ssozonoff | 1:d0f691423bf1 | 12 | all copies or substantial portions of the Software. |
ssozonoff | 1:d0f691423bf1 | 13 | |
ssozonoff | 1:d0f691423bf1 | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
ssozonoff | 1:d0f691423bf1 | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
ssozonoff | 1:d0f691423bf1 | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
ssozonoff | 1:d0f691423bf1 | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
ssozonoff | 1:d0f691423bf1 | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
ssozonoff | 1:d0f691423bf1 | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
ssozonoff | 1:d0f691423bf1 | 20 | THE SOFTWARE. |
ssozonoff | 1:d0f691423bf1 | 21 | */ |
ssozonoff | 1:d0f691423bf1 | 22 | |
ssozonoff | 1:d0f691423bf1 | 23 | #include "mbed.h" |
ssozonoff | 1:d0f691423bf1 | 24 | |
ssozonoff | 1:d0f691423bf1 | 25 | #ifndef SHT21_I2C_H |
ssozonoff | 1:d0f691423bf1 | 26 | #define SHT21_I2C_H |
ssozonoff | 1:d0f691423bf1 | 27 | |
ssozonoff | 1:d0f691423bf1 | 28 | class SHT_I2C : public I2C { |
ssozonoff | 1:d0f691423bf1 | 29 | |
ssozonoff | 1:d0f691423bf1 | 30 | protected: |
ssozonoff | 1:d0f691423bf1 | 31 | PinName _scl; |
ssozonoff | 1:d0f691423bf1 | 32 | PinName _sda; |
ssozonoff | 1:d0f691423bf1 | 33 | |
ssozonoff | 1:d0f691423bf1 | 34 | public: |
ssozonoff | 1:d0f691423bf1 | 35 | |
ssozonoff | 1:d0f691423bf1 | 36 | SHT_I2C(PinName sda, PinName scl, const char *name = NULL) : I2C(sda, scl, name) { |
ssozonoff | 1:d0f691423bf1 | 37 | _sda = sda; |
ssozonoff | 1:d0f691423bf1 | 38 | _scl = scl; |
ssozonoff | 1:d0f691423bf1 | 39 | } |
ssozonoff | 1:d0f691423bf1 | 40 | |
ssozonoff | 1:d0f691423bf1 | 41 | void sclAsInput(void) { |
ssozonoff | 1:d0f691423bf1 | 42 | switch(_scl) { |
ssozonoff | 1:d0f691423bf1 | 43 | case p10: |
ssozonoff | 1:d0f691423bf1 | 44 | LPC_PINCON->PINSEL0 &= ~(3UL << 2); // p10, P0.1 as GPIO |
ssozonoff | 1:d0f691423bf1 | 45 | LPC_GPIO0->FIODIR &= ~(1UL << 1); // p10, P0.1 as Input |
ssozonoff | 1:d0f691423bf1 | 46 | break; |
ssozonoff | 1:d0f691423bf1 | 47 | case p27: |
ssozonoff | 1:d0f691423bf1 | 48 | LPC_PINCON->PINSEL0&=~(3UL << 22); // p27, P0.11 as GPIO |
ssozonoff | 1:d0f691423bf1 | 49 | LPC_GPIO0->FIODIR &= ~(1UL << 11); // p27, P0.11 as input |
ssozonoff | 1:d0f691423bf1 | 50 | break; |
ssozonoff | 1:d0f691423bf1 | 51 | } |
ssozonoff | 1:d0f691423bf1 | 52 | } |
ssozonoff | 1:d0f691423bf1 | 53 | |
ssozonoff | 1:d0f691423bf1 | 54 | int sclRead(void) { |
ssozonoff | 1:d0f691423bf1 | 55 | switch(_scl) { |
ssozonoff | 1:d0f691423bf1 | 56 | case p10: return (LPC_GPIO0->FIOPIN & (1UL << 1)) ? 1 : 0; |
ssozonoff | 1:d0f691423bf1 | 57 | case p27: return (LPC_GPIO0->FIOPIN & (1UL << 11)) ? 1 : 0; |
ssozonoff | 1:d0f691423bf1 | 58 | default: |
ssozonoff | 1:d0f691423bf1 | 59 | return 0; |
ssozonoff | 1:d0f691423bf1 | 60 | } |
ssozonoff | 1:d0f691423bf1 | 61 | } |
ssozonoff | 1:d0f691423bf1 | 62 | |
ssozonoff | 1:d0f691423bf1 | 63 | void sclNormal(void) { |
ssozonoff | 1:d0f691423bf1 | 64 | switch(_scl) { |
ssozonoff | 1:d0f691423bf1 | 65 | case p10: |
ssozonoff | 1:d0f691423bf1 | 66 | LPC_PINCON->PINSEL0 &= ~(3UL << 2); // p10, P0.1 as I2C SCL1 |
ssozonoff | 1:d0f691423bf1 | 67 | LPC_PINCON->PINSEL0 |= (3UL << 2); |
ssozonoff | 1:d0f691423bf1 | 68 | break; |
ssozonoff | 1:d0f691423bf1 | 69 | case p27: |
ssozonoff | 1:d0f691423bf1 | 70 | LPC_PINCON->PINSEL0 &= ~(3UL << 22); // p27, P0.11 as I2C SCL2 |
ssozonoff | 1:d0f691423bf1 | 71 | LPC_PINCON->PINSEL0 |= (2UL << 22); |
ssozonoff | 1:d0f691423bf1 | 72 | break; |
ssozonoff | 1:d0f691423bf1 | 73 | } |
ssozonoff | 1:d0f691423bf1 | 74 | } |
ssozonoff | 1:d0f691423bf1 | 75 | |
ssozonoff | 1:d0f691423bf1 | 76 | }; |
ssozonoff | 1:d0f691423bf1 | 77 | |
ssozonoff | 1:d0f691423bf1 | 78 | #endif |