Diff: Masters/TARGET_Maxim/TARGET_MAX32600/OwGpio/OwGpio.cpp

Revision:

138:5bd0a7a82bb4

Child:

139:f0e0a7976846

diff -r a1f0069f1832 -r 5bd0a7a82bb4 Masters/TARGET_Maxim/TARGET_MAX32600/OwGpio/OwGpio.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Masters/TARGET_Maxim/TARGET_MAX32600/OwGpio/OwGpio.cpp	Fri Dec 02 19:21:55 2016 +0000
@@ -0,0 +1,226 @@
+/******************************************************************//**
+* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* 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 MAXIM INTEGRATED 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.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+**********************************************************************/
+
+#ifdef TARGET_MAX32600
+
+#include "Masters/TARGET_Maxim/TARGET_MAX32600/OwGpio/OwGpio.h"
+#include "Masters/TARGET_Maxim/TARGET_MAX32600/OwGpio/owlink.h"
+#include "gpio_regs.h"
+#include "clkman_regs.h"
+
+
+using OneWire::OneWireMaster;
+using OneWire::OwGpio;
+
+static const OwTiming stdTiming = {
+                                      560, // tRSTL
+                                      68, // tMSP
+                                      64, // tW0L
+                                      8, // tW1L
+                                      12, // tMSR
+                                      70, // tSLOT
+                                  };
+
+static const OwTiming odTiming = {
+                                      56, // tRSTL
+                                      8, // tMSP
+                                      8, // tW0L
+                                      1, // tW1L
+                                      1, // tMSR
+                                      10, // tSLOT
+                                 };
+
+OwGpio::OwGpio(PinName owGpio, PinName extSpu, bool extSpuActiveHigh)
+    : owPort(PINNAME_TO_PORT(owGpio)), owPin(PINNAME_TO_PIN(owGpio)), owSpeed(StandardSpeed),
+        extSpu(extSpu), extSpuActiveHigh(extSpuActiveHigh)
+{
+
+}
+
+OneWireMaster::CmdResult OwGpio::OWInitMaster()
+{
+    if (MXC_CLKMAN->clk_ctrl_1_gpio == MXC_E_CLKMAN_CLK_SCALE_DISABLED)
+    {
+        MXC_CLKMAN->clk_ctrl_1_gpio = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
+    }
+
+    /* Set function */
+    MXC_GPIO->func_sel[owPort] &= ~(0xF << (4 * owPin));
+
+    /* Normal input is always enabled */
+    MXC_GPIO->in_mode[owPort] &= ~(0xF << (4 * owPin));
+
+    writeOwGpioHigh();
+    OWSetLevel(NormalLevel);
+
+    return OneWireMaster::Success;
+}
+
+OneWireMaster::CmdResult OwGpio::OWReset()
+{
+    const OwTiming & curTiming(owSpeed == OverdriveSpeed ? odTiming : stdTiming);
+    uint16_t tREC = curTiming.tRSTL - curTiming.tMSP; // tSLOT = 2 *tRSTL
+
+    __disable_irq(); // Enter critical section
+    
+    writeOwGpioLow(); // Pull low
+    ow_usdelay(curTiming.tRSTL); // Wait specified time for reset pulse
+    writeOwGpioHigh(); // Let go of pin
+    ow_usdelay(curTiming.tMSP); // Wait specified time for master sample
+    uint8_t pd_pulse = readOwGpio(); // Get sample
+    ow_usdelay(tREC); // Wait for slot time to finish including recovery
+    
+    __enable_irq(); // Exit critical section
+
+    return((pd_pulse == 0) ? OneWireMaster::Success : OneWireMaster::OperationFailure);
+}
+
+OneWireMaster::CmdResult OwGpio::OWTouchBitSetLevel(uint8_t & sendRecvBit, OWLevel afterLevel)
+{
+    __disable_irq(); // Enter critical section
+
+    ow_bit(&sendRecvBit, &MXC_GPIO->in_val[owPort], &MXC_GPIO->out_val[owPort], (1 << owPin),
+            ((owSpeed == OverdriveSpeed) ? &odTiming : &stdTiming));
+    OWSetLevel(afterLevel);
+
+    __enable_irq(); // Exit critical section
+
+    return OneWireMaster::Success;
+}
+
+OneWireMaster::CmdResult OwGpio::OWWriteByteSetLevel(uint8_t sendByte, OWLevel afterLevel)
+{
+    OneWireMaster::CmdResult result;
+
+    for (uint8_t idx = 0; idx < 8; idx++)
+    {
+        result = OneWireMaster::OWWriteBit(0x01 & (sendByte >> idx));
+        if (result != OneWireMaster::Success)
+        {
+            break;
+        }
+    }
+
+    if (result == OneWireMaster::Success)
+    {
+        OWSetLevel(afterLevel);
+    }
+
+    return result;
+}
+
+OneWireMaster::CmdResult OwGpio::OWReadByteSetLevel(uint8_t & recvByte, OWLevel afterLevel)
+{
+    OneWireMaster::CmdResult result;
+    uint8_t recvBit;
+    recvByte = 0;
+
+    for (unsigned int idx = 0; idx < 8; idx++)
+    {
+        result = OneWireMaster::OWReadBit(recvBit);
+        if (result != OneWireMaster::Success)
+        {
+            break;
+        }
+        //else
+        recvByte |= ((0x01 & recvBit) << idx);
+    }
+
+    if (result == OneWireMaster::Success)
+    {
+        OWSetLevel(afterLevel);
+    }
+
+    return result;
+}
+
+OneWireMaster::CmdResult OwGpio::OWSetSpeed(OWSpeed newSpeed)
+{
+    owSpeed = newSpeed;
+    return OneWireMaster::Success;
+}
+
+OneWireMaster::CmdResult OwGpio::OWSetLevel(OWLevel newLevel)
+{    
+    switch (newLevel)
+    {
+    case NormalLevel:
+    default:
+        setOwGpioMode(MXC_V_GPIO_OUT_MODE_OPEN_DRAIN);
+        if (extSpu.is_connected())
+        {
+            extSpu = !extSpuActiveHigh;
+        }
+        break;
+
+    case StrongLevel:
+        if (extSpu.is_connected())
+        {
+            extSpu = extSpuActiveHigh;
+        }
+        else
+        {
+            setOwGpioMode(MXC_V_GPIO_OUT_MODE_NORMAL_DRIVE);
+        }
+        break;
+    }
+
+    return OneWireMaster::Success;
+}
+
+inline void OwGpio::writeOwGpioLow()
+{
+    MXC_GPIO->out_val[owPort] &= ~(1 << owPin);
+}
+
+inline void OwGpio::writeOwGpioHigh()
+{
+    MXC_GPIO->out_val[owPort] |= (1 << owPin);
+}
+
+inline bool OwGpio::readOwGpio()
+{
+    return ((MXC_GPIO->in_val[owPort] & (1 << owPin)) >> owPin);
+}
+
+inline void OwGpio::setOwGpioMode(unsigned int mode)
+{
+    //read port out_mode
+    uint32_t ow_out_mode = MXC_GPIO->out_mode[owPort];
+    //clear the mode for ow_pin
+    ow_out_mode &= ~(0xF << (owPin * 4));
+    //write ow_pin mode and original data back
+    MXC_GPIO->out_mode[owPort] = (ow_out_mode | (mode << (owPin * 4)));
+}
+
+#endif /* TARGET_MAX32600 */
+