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Diff: targets/TARGET_Maxim/TARGET_MAX32600/pinmap.c
- Revision:
- 149:156823d33999
- Parent:
- 144:ef7eb2e8f9f7
diff -r 21d94c44109e -r 156823d33999 targets/TARGET_Maxim/TARGET_MAX32600/pinmap.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/TARGET_Maxim/TARGET_MAX32600/pinmap.c Fri Oct 28 11:17:30 2016 +0100 @@ -0,0 +1,105 @@ +/******************************************************************************* + * Copyright (C) 2015 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. + ******************************************************************************* + */ + +#include "mbed_assert.h" +#include "pinmap.h" +#include "objects.h" +#include "gpio_regs.h" +#include "ioman_regs.h" + +void pin_function(PinName name, int function) +{ + MBED_ASSERT(name != (PinName)NC); + + if ((function >= 0) && (function <= 0xF)) { + unsigned int port = PINNAME_TO_PORT(name); + unsigned int pin = PINNAME_TO_PIN(name); + uint32_t temp = MXC_GPIO->func_sel[port] & ~(0xF << (pin*4)); + MXC_GPIO->func_sel[port] = temp | ((uint32_t)function << (pin*4)); + } else { + /* Assume this is a pointer to a pin function object */ + pin_function_t *obj = (pin_function_t*)function; + + if ((*obj->reg_ack & obj->ack_mask) != obj->req_val) { + /* Request pin mapping */ + *obj->reg_req |= obj->req_val; + + /* Check for acknowledgment */ + MBED_ASSERT((*obj->reg_ack & obj->ack_mask) == obj->req_val); + } + } +} + +void pin_mode(PinName name, PinMode mode) +{ + MBED_ASSERT(name != (PinName)NC); + unsigned int port = PINNAME_TO_PORT(name); + unsigned int pin = PINNAME_TO_PIN(name); + + /* Must set mode while retaining direction */ + + /* Get the current direction */ + uint32_t out_mode = MXC_GPIO->out_mode[port]; + uint32_t curr_mode = (out_mode >> (pin*4)) & 0xF; + PinDirection dir = PIN_OUTPUT; + if ((curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP) || (curr_mode == MXC_V_GPIO_OUT_MODE_HIGH_Z)) { + dir = PIN_INPUT; + } + + /* Set mode based on current direction */ + uint32_t new_mode; + if (dir == PIN_OUTPUT) { + // PullUp = not valid, + // OpenDrain = MXC_V_GPIO_OUT_MODE_OD, + // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL, + if (mode == OpenDrain) { + new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN; + } else { + new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_DRIVE; + } + } else { + // PullUp = MXC_V_GPIO_OUT_MODE_HIZPU, + // OpenDrain = not valid, + // PullNone = MXC_V_GPIO_OUT_MODE_HIZ, + if (mode == PullUp) { + new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP; + } else { + new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z; + } + } + + /* Set new mode */ + out_mode &= ~(0xF << (pin*4)); + out_mode |= (new_mode << (pin*4)); + MXC_GPIO->out_mode[port] = out_mode; +}