Diff: wire.h

Revision:

23:708cc5ef2604

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wire.h	Wed May 31 22:13:36 2017 +0000
@@ -0,0 +1,104 @@
+
+/*
+
+    Copyright (c) 2014 RedBearLab, All rights reserved.
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+    See the GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+    TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+    SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+#ifndef _WIRE_H_
+#define _WIRE_H_
+
+#include "mbed.h"
+
+#define TWI_DELAY(x)                    wait_us(x);
+
+#define BUFF_MAX_LENGTH                 128
+
+#define MAX_TIMEOUT_LOOPS               (20000UL)
+
+#define TWI_FREQUENCY_100K              0 
+#define TWI_FREQUENCY_250K              1 
+#define TWI_FREQUENCY_400K              2 
+
+#define TWI_SCL                         28
+#define TWI_SDA                         29
+
+
+class TwoWire
+{  
+    public :
+        TwoWire(NRF_TWI_Type *twi_use);
+        void begin();
+        void begin(uint32_t scl_pin, uint32_t sda_pin, uint8_t speed);
+        void beginTransmission(uint8_t);
+        void beginTransmission(int);
+        uint8_t endTransmission(void);
+        uint8_t endTransmission(uint8_t);
+        uint8_t requestFrom(uint8_t, uint8_t);
+        uint8_t requestFrom(uint8_t, uint8_t, uint8_t);
+        uint8_t requestFrom(int, int);
+        uint8_t requestFrom(int, int, int);
+        int write(uint8_t);
+        int write(const uint8_t *, size_t);
+        int available(void);
+        int read(void);  
+        
+     private : 
+        uint8_t RX_Buffer[BUFF_MAX_LENGTH];
+        uint8_t RX_BufferIndex;
+        uint8_t RX_BufferLength;
+        
+        uint8_t TX_Buffer[BUFF_MAX_LENGTH];
+        uint8_t TX_BufferIndex;
+        uint8_t TX_BufferLength;
+        
+        NRF_TWI_Type *twi;
+        
+        uint8_t PPI_channel;
+        uint8_t Transform_Addr;
+        
+        uint32_t SDA_Pin;
+        uint32_t SCL_Pin;
+        
+        uint32_t twi_frequency;
+
+        enum TwoWireStatus {
+            UNINITIALIZED,
+            MASTER_IDLE,
+            MASTER_SEND,
+            MASTER_RECV,
+            SLAVE_IDLE,
+            SLAVE_RECV,
+            SLAVE_SEND
+        };
+        TwoWireStatus twi_status;
+        
+        bool twi_master_clear_bus(void);
+        bool twi_master_init(void);
+        uint8_t twi_master_read(uint8_t *data, uint8_t data_length, uint8_t issue_stop_condition);
+        uint8_t twi_master_write(uint8_t *data, uint8_t data_length, uint8_t issue_stop_condition);
+};
+
+#endif