Diff: pca9544a.h

Revision:

2:31aceaca418e

Parent:

1:4d19097c0571

--- a/pca9544a.h	Thu Sep 14 00:20:01 2017 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,103 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2017 AT&T, IIoT Foundry, Plano, TX, USA
- *
- * 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.
- */
-
-/** \addtogroup drivers */
-
-/** Support for the NXP PCA9544A 4-channel I2C switch.
- *
- * Example:
- * @code
- *
- * #include "mbed.h"
- * #include "PCA9544A.h"
- *
- * // PCA9544A strapped for address option 0 (7-bit I2C address 0x70)
- *
- * I2C            i2c(I2C_SDA, I2C_SCL);
- * PCA9544A<I2C>  pca9544a(&i2c, 0);
- *
- * int main() {
- *     bool                ok;
- *
- *     // Enable channel 1
- *     bool ok = _pca9544a->select_channel(1);
- *     if (ok) {
- *         printf("I2C device on channel 1 is now accessible\r\n);
- *     } else {
- *         printf("pca9544a error!\r\n");
- *     }
- *
- *     // Disconnect all downstream devices from the I2C bus
- *     _pca9544a->reset();
- * }
- * @endcode
- * @ingroup drivers
- */
-
-#pragma once
-
-#define PCA9544A_BASE_ADDR_7BIT     0x70
-#define MAX_CHANNELS                4
-
-template <class T>
-class PCA9544A
-{
-public:
-    /**
-    * Constructor
-    *
-    * @param i2c I2C class servicing the multiplexer
-    * @param addr_3bit address of the multiplexer (A0-A2 pin strapping)
-    *          Valid values are 0-7
-    */
-    PCA9544A(T * i2c, uint8_t addr_3bit) : _i2c(i2c) {
-        _addr_8bit = ((addr_3bit & 0x7) + PCA9544A_BASE_ADDR_7BIT) << 1;
-    }
-
-    /**
-    * Reset the multiplexer.  All devices connected to the downstream side of
-    * the multiplexer are removed from the I2C bus.  Reset is accomplished by
-    * deselecting all channels through soft configuration.
-    *
-    * @returns true if successful
-    */
-    bool reset(void) {
-        const char channel = 0;
-        return _i2c->write(_addr_8bit, &channel, 1) == 0;
-    }
-
-    /**
-    * Enable access to one of the eight devices on the downstream side of
-    * the multiplexer.
-    *
-    * @param channel channel to activate.  Valid values are 0-7.
-    *
-    * @returns true if successful
-    */
-    bool select_channel(const uint8_t channel) {
-        if (channel < MAX_CHANNELS) {
-            char channel_mask = 0x4 | channel;
-            return _i2c->write(_addr_8bit, (const char *)&channel_mask, 1) == 0;
-        } else {
-            return false;
-        }
-    }
-
-protected:
-    int     _addr_8bit;
-    T      *_i2c;
-};
-