I2C boot loader with Blinky code Should test it with Freescale boards fingers crossed should work
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main.cpp@4:df6232c70efd, 2015-03-27 (annotated)
- Committer:
- mbedAustin
- Date:
- Fri Mar 27 20:14:09 2015 +0000
- Revision:
- 4:df6232c70efd
- Parent:
- 3:ab0e4b55d7da
Added license to main.c file.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbedAustin | 4:df6232c70efd | 1 | /* mbed Example Program |
mbedAustin | 4:df6232c70efd | 2 | * Copyright (c) 2006-2014 ARM Limited |
mbedAustin | 4:df6232c70efd | 3 | * |
mbedAustin | 4:df6232c70efd | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbedAustin | 4:df6232c70efd | 5 | * you may not use this file except in compliance with the License. |
mbedAustin | 4:df6232c70efd | 6 | * You may obtain a copy of the License at |
mbedAustin | 4:df6232c70efd | 7 | * |
mbedAustin | 4:df6232c70efd | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbedAustin | 4:df6232c70efd | 9 | * |
mbedAustin | 4:df6232c70efd | 10 | * Unless required by applicable law or agreed to in writing, software |
mbedAustin | 4:df6232c70efd | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbedAustin | 4:df6232c70efd | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbedAustin | 4:df6232c70efd | 13 | * See the License for the specific language governing permissions and |
mbedAustin | 4:df6232c70efd | 14 | * limitations under the License. |
mbedAustin | 4:df6232c70efd | 15 | */ |
mbed_official | 0:f76c26307f9a | 16 | #include "mbed.h" |
mbed_official | 0:f76c26307f9a | 17 | |
mbed_official | 0:f76c26307f9a | 18 | // Read temperature from LM75BD |
mbed_official | 0:f76c26307f9a | 19 | |
mbedAustin | 3:ab0e4b55d7da | 20 | I2C i2c(I2C_SDA , I2C_SCL ); |
mbed_official | 0:f76c26307f9a | 21 | |
mbedAustin | 3:ab0e4b55d7da | 22 | const int addr7bit = 0x48; // 7 bit I2C address |
mbedAustin | 3:ab0e4b55d7da | 23 | const int addr8bit = 0x48 << 1; // 8bit I2C address, 0x90 |
mbed_official | 0:f76c26307f9a | 24 | |
mbed_official | 0:f76c26307f9a | 25 | int main() { |
mbed_official | 0:f76c26307f9a | 26 | char cmd[2]; |
mbed_official | 0:f76c26307f9a | 27 | while (1) { |
mbed_official | 0:f76c26307f9a | 28 | cmd[0] = 0x01; |
mbed_official | 0:f76c26307f9a | 29 | cmd[1] = 0x00; |
mbedAustin | 3:ab0e4b55d7da | 30 | i2c.write(addr8bit, cmd, 2); |
mbed_official | 0:f76c26307f9a | 31 | |
mbed_official | 0:f76c26307f9a | 32 | wait(0.5); |
mbed_official | 0:f76c26307f9a | 33 | |
mbed_official | 0:f76c26307f9a | 34 | cmd[0] = 0x00; |
mbedAustin | 3:ab0e4b55d7da | 35 | i2c.write(addr8bit, cmd, 1); |
mbedAustin | 3:ab0e4b55d7da | 36 | i2c.read( addr8bit, cmd, 2); |
mbed_official | 0:f76c26307f9a | 37 | |
mbed_official | 0:f76c26307f9a | 38 | float tmp = (float((cmd[0]<<8)|cmd[1]) / 256.0); |
mbed_official | 0:f76c26307f9a | 39 | printf("Temp = %.2f\n", tmp); |
mbed_official | 0:f76c26307f9a | 40 | } |
mbed_official | 0:f76c26307f9a | 41 | } |