Revision 0:38c206f19bb7, committed 2016-04-11

Comitter:

MikkoZ

Date:

Mon Apr 11 08:26:39 2016 +0000

Child:

1:4d6dc19a2347

Commit message:

Added initial version of i2C HAL

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.gitignore	Mon Apr 11 08:26:39 2016 +0000
@@ -0,0 +1,39 @@
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+
+# Yotta files
+yotta_modules/
+yotta_targets/
+build/
+upload.tar.gz
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/README.md	Mon Apr 11 08:26:39 2016 +0000
@@ -0,0 +1,3 @@
+# rohm-sensor-hal
+Platform HAL for rohm sensor drivers. Used for abstracting Arduino/mbed os/mbed classic.
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/module.json	Mon Apr 11 08:26:39 2016 +0000
@@ -0,0 +1,17 @@
+{
+  "name": "rohm-sensor-hal",
+  "version": "0.0.0",
+  "description": "Rohm HAL for sensor driver development",
+  "keywords": [
+    "rohm",
+    "hal"
+  ],
+  "author": "Mikko Koivunen",
+  "repository": {
+    "url": "",
+    "type": "git"
+  },
+  "license": "Apache-2.0",
+  "dependencies": {}
+}
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rohm-sensor-hal/I2CCommon.h	Mon Apr 11 08:26:39 2016 +0000
@@ -0,0 +1,32 @@
+/*   Copyright 2016 Rohm Semiconductor
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+#ifndef i2c_common_h
+#define i2c_common_h
+/*  i2c common functions 
+    This interface is the same for Arduino hardware i2c lib Wire, Arduino software i2c lib SoftI2CMaster and mbed hardware lib I2C.
+    Choosing between them is done by compile time using flags, for mbed use USE_MBED_HARDWARE_I2C -flag.
+    Note: This method doesn't allow multiple i2c busses to be used at same time.
+*/
+#include "rohm_hal.h"       //types, DEBUG_print*, USE_*_HARDWARE_I2C
+
+bool I2CCommonBegin();
+uint8_t read_register(uint8_t sad, uint8_t reg, uint8_t* buf, uint8_t buf_len);
+void write_registers(uint8_t sad, uint8_t reg, uint8_t* data, uint8_t data_len);
+void write_register(uint8_t sad, uint8_t reg, uint8_t data);
+bool change_bits(uint8_t sad, uint8_t reg, uint8_t mask, uint8_t bits);
+
+#endif
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rohm-sensor-hal/rohm_hal.h	Mon Apr 11 08:26:39 2016 +0000
@@ -0,0 +1,49 @@
+/*   Copyright 2016 Rohm Semiconductor
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+#ifndef ROHM_HAL_H
+#define ROHM_HAL_H
+
+/* This file is meant for making same code work on many platforms easier. */
+#ifdef __MBED__
+    #include "mbed.h"               //types
+
+    #define USE_MBED_HARDWARE_I2C
+    extern Serial pc;
+    //Serial pc(USBTX, USBRX); done in main.cpp
+    #define DEBUG_print(...)    pc.printf(__VA_ARGS__)
+    #define DEBUG_printf(...)   pc.printf(__VA_ARGS__)
+    #define DEBUG_println(...)  pc.printf(__VA_ARGS__);pc.printf("\r\n")
+
+#elif __ARDUINO__
+    #include <arduino.h>            //types, Serial
+
+    //#define USE_ARDUINO_SOFTWARE_I2C
+    #define USE_ARDUINO_HARDWARE_I2C
+
+    #define DEBUG_printf(a)         Serial.print(a)
+    #define DEBUG_printf(a, b)      Serial.print(a);Serial.print(b)
+    #define DEBUG_printf(a, b, c)       Serial.print(a);Serial.print(b);Serial.print(c)
+    #define DEBUG_printf(a, b, c, ...)  Serial.print(a);Serial.print(b);Serial.print(c)
+    #define DEBUG_print()           Serial.print()
+    #define DEBUG_println()         Serial.println()
+#endif
+
+#if 0       //Enable/disable debug prints
+    #define DEBUG_print()
+    #define DEBUG_printf()
+    #define DEBUG_println()
+#endif
+
+#endif /* ROHM_HAL_H */

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/I2CCommonMbedHardwareLib.cpp	Mon Apr 11 08:26:39 2016 +0000
@@ -0,0 +1,76 @@
+/*   Copyright 2016 Rohm Semiconductor
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+#include "../rohm-sensor-hal/rohm_hal.h"           //types, USE_MBED_HARDWARE_I2C, DEBUG_print*, I2C_SDA, I2C_SCL
+#ifdef USE_MBED_HARDWARE_I2C
+#include "../rohm-sensor-hal/I2CCommon.h"          //prototypes
+#include "I2C.h"                //I2C
+#define I2C_WRITE 0
+#define I2C_READ  1
+I2C i2c(I2C_SDA, I2C_SCL);
+
+
+//Note that I2CCommonBegin() must be called before using read/write functions.
+bool I2CCommonBegin(){
+    return( true );        //always succeeds
+}
+
+/* i2c common functions */
+uint8_t read_register(uint8_t sad, uint8_t reg, uint8_t* buf, uint8_t buf_len) {
+    uint8_t received_bytes;
+    int read_ok;
+
+    i2c.write( (int)((sad << 1) | I2C_WRITE), (char*)&reg, (int)1 );
+    read_ok = i2c.read( (int)((sad << 1) | I2C_READ), (char*)buf, (int)buf_len);
+
+    if( read_ok == 0 ){     //0 == success(ack)
+        received_bytes = buf_len;
+        }
+    else{                   //non0 == fail (nack)
+        received_bytes = 0;
+        }
+    return( received_bytes );
+}
+
+void write_registers(uint8_t sad, uint8_t reg, uint8_t* data, uint8_t data_len) {
+    i2c.write( (int)((sad << 1) | I2C_WRITE ), (char*)&reg, (int)1, true);
+    i2c.write( (int)((sad << 1) | I2C_WRITE ), (char*)data, (int)data_len, false);
+}
+
+void write_register(uint8_t sad, uint8_t reg, uint8_t data) {
+    char data_to_send[2];
+
+    data_to_send[0] = reg;
+    data_to_send[1] = data;
+    i2c.write( (int)((sad << 1) | I2C_WRITE ), &data_to_send[0], 2);
+}
+
+bool change_bits(uint8_t sad, uint8_t reg, uint8_t mask, uint8_t bits){
+    uint8_t value, read_bytes;
+    read_bytes = read_register(sad, reg, &value, 1);
+    if( read_bytes != 0 ){
+        value = value & ~mask;
+        value = value | (bits & mask);
+        write_register(sad, reg, value);
+        return true;
+        }
+    else{
+        //DEBUG_printf("Read before change_bits() failed.");
+        return false;
+        }
+}
+
+#endif
+
+