Cortney Padua / capstone_i2c

initial code for i2c communication with accelerometers

Dependencies:   BLE_API mbed-dev nRF51822

Fork of capstone_i2c by Zachary Newman

wire.h@5:a52a03b6d13b, 2017-04-11 (annotated)

Committer:
cpadua
Date:
Tue Apr 11 20:39:41 2017 +0000
Revision:
5:a52a03b6d13b
Parent:
0:6a249a5be3a4 
fixed i2c-api.c

Who changed what in which revision?

UserRevisionLine numberNew contents of line
znew711 0:6a249a5be3a4 1
znew711 0:6a249a5be3a4 2 /*
znew711 0:6a249a5be3a4 3
znew711 0:6a249a5be3a4 4 Copyright (c) 2014 RedBearLab, All rights reserved.
znew711 0:6a249a5be3a4 5
znew711 0:6a249a5be3a4 6 This library is free software; you can redistribute it and/or
znew711 0:6a249a5be3a4 7 modify it under the terms of the GNU Lesser General Public
znew711 0:6a249a5be3a4 8 License as published by the Free Software Foundation; either
znew711 0:6a249a5be3a4 9 version 2.1 of the License, or (at your option) any later version.
znew711 0:6a249a5be3a4 10
znew711 0:6a249a5be3a4 11 This library is distributed in the hope that it will be useful,
znew711 0:6a249a5be3a4 12 but WITHOUT ANY WARRANTY; without even the implied warranty of
znew711 0:6a249a5be3a4 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
znew711 0:6a249a5be3a4 14 See the GNU Lesser General Public License for more details.
znew711 0:6a249a5be3a4 15
znew711 0:6a249a5be3a4 16 You should have received a copy of the GNU Lesser General Public
znew711 0:6a249a5be3a4 17 License along with this library; if not, write to the Free Software
znew711 0:6a249a5be3a4 18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
znew711 0:6a249a5be3a4 19
znew711 0:6a249a5be3a4 20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
znew711 0:6a249a5be3a4 21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
znew711 0:6a249a5be3a4 22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
znew711 0:6a249a5be3a4 23 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
znew711 0:6a249a5be3a4 24 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
znew711 0:6a249a5be3a4 25 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
znew711 0:6a249a5be3a4 26 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
znew711 0:6a249a5be3a4 27
znew711 0:6a249a5be3a4 28 */
znew711 0:6a249a5be3a4 29
znew711 0:6a249a5be3a4 30 #ifndef _WIRE_H_
znew711 0:6a249a5be3a4 31 #define _WIRE_H_
znew711 0:6a249a5be3a4 32
znew711 0:6a249a5be3a4 33 #include "mbed.h"
znew711 0:6a249a5be3a4 34
znew711 0:6a249a5be3a4 35 #define TWI_DELAY(x) wait_us(x);
znew711 0:6a249a5be3a4 36
znew711 0:6a249a5be3a4 37 #define BUFF_MAX_LENGTH 128
znew711 0:6a249a5be3a4 38
znew711 0:6a249a5be3a4 39 #define MAX_TIMEOUT_LOOPS (20000UL)
znew711 0:6a249a5be3a4 40
znew711 0:6a249a5be3a4 41 #define TWI_FREQUENCY_100K 0
znew711 0:6a249a5be3a4 42 #define TWI_FREQUENCY_250K 1
znew711 0:6a249a5be3a4 43 #define TWI_FREQUENCY_400K 2
znew711 0:6a249a5be3a4 44
znew711 0:6a249a5be3a4 45 #define TWI_SCL 28
znew711 0:6a249a5be3a4 46 #define TWI_SDA 29
znew711 0:6a249a5be3a4 47
znew711 0:6a249a5be3a4 48
znew711 0:6a249a5be3a4 49 class TwoWire
znew711 0:6a249a5be3a4 50 {
znew711 0:6a249a5be3a4 51 public :
znew711 0:6a249a5be3a4 52 TwoWire(NRF_TWI_Type *twi_use);
znew711 0:6a249a5be3a4 53 void begin();
znew711 0:6a249a5be3a4 54 void begin(uint32_t scl_pin, uint32_t sda_pin, uint8_t speed);
znew711 0:6a249a5be3a4 55 void beginTransmission(uint8_t);
znew711 0:6a249a5be3a4 56 void beginTransmission(int);
znew711 0:6a249a5be3a4 57 uint8_t endTransmission(void);
znew711 0:6a249a5be3a4 58 uint8_t endTransmission(uint8_t);
znew711 0:6a249a5be3a4 59 uint8_t requestFrom(uint8_t, uint8_t);
znew711 0:6a249a5be3a4 60 uint8_t requestFrom(uint8_t, uint8_t, uint8_t);
znew711 0:6a249a5be3a4 61 uint8_t requestFrom(int, int);
znew711 0:6a249a5be3a4 62 uint8_t requestFrom(int, int, int);
znew711 0:6a249a5be3a4 63 int write(uint8_t);
znew711 0:6a249a5be3a4 64 int write(const uint8_t *, size_t);
znew711 0:6a249a5be3a4 65 int available(void);
znew711 0:6a249a5be3a4 66 int read(void);
znew711 0:6a249a5be3a4 67
znew711 0:6a249a5be3a4 68 private :
znew711 0:6a249a5be3a4 69 uint8_t RX_Buffer[BUFF_MAX_LENGTH];
znew711 0:6a249a5be3a4 70 uint8_t RX_BufferIndex;
znew711 0:6a249a5be3a4 71 uint8_t RX_BufferLength;
znew711 0:6a249a5be3a4 72
znew711 0:6a249a5be3a4 73 uint8_t TX_Buffer[BUFF_MAX_LENGTH];
znew711 0:6a249a5be3a4 74 uint8_t TX_BufferIndex;
znew711 0:6a249a5be3a4 75 uint8_t TX_BufferLength;
znew711 0:6a249a5be3a4 76
znew711 0:6a249a5be3a4 77 NRF_TWI_Type *twi;
znew711 0:6a249a5be3a4 78
znew711 0:6a249a5be3a4 79 uint8_t PPI_channel;
znew711 0:6a249a5be3a4 80 uint8_t Transform_Addr;
znew711 0:6a249a5be3a4 81
znew711 0:6a249a5be3a4 82 uint32_t SDA_Pin;
znew711 0:6a249a5be3a4 83 uint32_t SCL_Pin;
znew711 0:6a249a5be3a4 84
znew711 0:6a249a5be3a4 85 uint32_t twi_frequency;
znew711 0:6a249a5be3a4 86
znew711 0:6a249a5be3a4 87 enum TwoWireStatus {
znew711 0:6a249a5be3a4 88 UNINITIALIZED,
znew711 0:6a249a5be3a4 89 MASTER_IDLE,
znew711 0:6a249a5be3a4 90 MASTER_SEND,
znew711 0:6a249a5be3a4 91 MASTER_RECV,
znew711 0:6a249a5be3a4 92 SLAVE_IDLE,
znew711 0:6a249a5be3a4 93 SLAVE_RECV,
znew711 0:6a249a5be3a4 94 SLAVE_SEND
znew711 0:6a249a5be3a4 95 };
znew711 0:6a249a5be3a4 96 TwoWireStatus twi_status;
znew711 0:6a249a5be3a4 97
znew711 0:6a249a5be3a4 98 bool twi_master_clear_bus(void);
znew711 0:6a249a5be3a4 99 bool twi_master_init(void);
znew711 0:6a249a5be3a4 100 uint8_t twi_master_read(uint8_t *data, uint8_t data_length, uint8_t issue_stop_condition);
znew711 0:6a249a5be3a4 101 uint8_t twi_master_write(uint8_t *data, uint8_t data_length, uint8_t issue_stop_condition);
znew711 0:6a249a5be3a4 102 };
znew711 0:6a249a5be3a4 103
znew711 0:6a249a5be3a4 104 #endif