mbed library sources. Supersedes mbed-src.
Dependents: Hobbyking_Cheetah_Compact Hobbyking_Cheetah_Compact_DRV8323_14bit Hobbyking_Cheetah_Compact_DRV8323_V51_201907 HKC_MiniCheetah ... more
Fork of mbed-dev by
targets/TARGET_Maxim/TARGET_MAX32620/pinmap.c
- Committer:
- benkatz
- Date:
- 2018-07-30
- Revision:
- 181:36facd806e4a
- Parent:
- 149:156823d33999
File content as of revision 181:36facd806e4a:
/******************************************************************************* * 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. ******************************************************************************* */ #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_WEAK_PULLDOWN) || (curr_mode == MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z)) { dir = PIN_INPUT; } /* Set mode based on current direction */ uint32_t new_mode; if (dir == PIN_OUTPUT) { // PullUp = not valid, // PullDown = 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; } } else { // PullUp = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP // PullDown = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN // OpenDrain = MXC_V_GPIO_OUT_MODE_OD // PullNone = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z if (mode == PullUp) { new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLUP; MXC_GPIO->out_val[port] |= 1 << pin; } else if (mode == PullDown) { new_mode = MXC_V_GPIO_OUT_MODE_HIGH_Z_WEAK_PULLDOWN; MXC_GPIO->out_val[port] &= ~(1 << pin); } else if (mode == OpenDrain) { new_mode = MXC_V_GPIO_OUT_MODE_OPEN_DRAIN; MXC_GPIO->out_val[port] |= 1 << pin; } else { new_mode = MXC_V_GPIO_OUT_MODE_NORMAL_HIGH_Z; MXC_GPIO->out_val[port] &= ~(1 << pin); } } /* Set new mode */ out_mode &= ~(0xF << (pin * 4)); out_mode |= (new_mode << (pin * 4)); MXC_GPIO->out_mode[port] = out_mode; }