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targets/TARGET_Maxim/TARGET_MAX32630/gpio_api.c
- Committer:
- <>
- Date:
- 2017-02-02
- Revision:
- 157:ff67d9f36b67
- Child:
- 171:89b338f31ef1
File content as of revision 157:ff67d9f36b67:
/******************************************************************************* * 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 "gpio_api.h" #include "pinmap.h" #include "gpio_regs.h" #include "clkman_regs.h" uint32_t gpio_set(PinName name) { MBED_ASSERT(name != (PinName)NC); pin_function(name, 0); return 1 << PINNAME_TO_PIN(name); } void gpio_init(gpio_t *obj, PinName name) { obj->name = name; if (name == (PinName)NC) { return; } unsigned int port = PINNAME_TO_PORT(name); unsigned int pin = PINNAME_TO_PIN(name); obj->reg_out = (uint32_t*)BITBAND(&MXC_GPIO->out_val[port], pin); obj->reg_in = (uint32_t*)BITBAND(&MXC_GPIO->in_val[port], pin); obj->mode = PullDefault; /* Ensure that the GPIO clock is enabled */ MXC_CLKMAN->clk_gate_ctrl1 |= MXC_F_CLKMAN_CLK_GATE_CTRL1_GPIO_CLK_GATER; /* Ensure that the GPIO clock is enabled */ MXC_CLKMAN->sys_clk_ctrl_6_gpio = MXC_S_CLKMAN_CLK_SCALE_DIV_1; } void gpio_mode(gpio_t *obj, PinMode mode) { obj->mode = mode; pin_mode(obj->name, mode); } void pin_dir_mode(PinName name, PinDirection direction, PinMode mode) { MBED_ASSERT(name != (PinName)NC); unsigned int port = PINNAME_TO_PORT(name); unsigned int pin = PINNAME_TO_PIN(name); /* Set function; Firmware Control (GPIO mode) */ MXC_GPIO->func_sel[port] &= ~(0xF << (4 * pin)); /* Normal input is always enabled */ MXC_GPIO->in_mode[port] &= ~(0xF << (4 * pin)); uint32_t new_mode; if (direction == 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 */ uint32_t out_mode = MXC_GPIO->out_mode[port]; out_mode &= ~(0xF << (pin * 4)); out_mode |= (new_mode << (pin * 4)); MXC_GPIO->out_mode[port] = out_mode; } void gpio_dir(gpio_t *obj, PinDirection direction) { pin_dir_mode(obj->name, direction, obj->mode); }