/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * 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. */ #include "mbed_assert.h" #include "pinmap.h" #include "mbed_error.h" #include "fsl_port.h" /* Array of PORT peripheral base address. */ static PORT_Type *const port_addrs[] = PORT_BASE_PTRS; void pin_function(PinName pin, int function) { MBED_ASSERT(pin != (PinName)NC); clock_ip_name_t port_clocks[] = PORT_CLOCKS; CLOCK_EnableClock(port_clocks[pin >> GPIO_PORT_SHIFT]); PORT_SetPinMux(port_addrs[pin >> GPIO_PORT_SHIFT], pin & 0xFF, (port_mux_t)function); } void pin_mode(PinName pin, PinMode mode) { MBED_ASSERT(pin != (PinName)NC); uint32_t instance = pin >> GPIO_PORT_SHIFT; uint32_t pinName = pin & 0xFF; PORT_Type *base = port_addrs[instance]; uint32_t reg = base->PCR[pinName]; switch (mode) { case PullNone: /* Write 0 to the PE, PS and ISF bits */ reg &= ~(PORT_PCR_PE_MASK | PORT_PCR_PS_MASK | PORT_PCR_ISF_MASK); break; case PullDown: /* Write 0 to PS and ISF bits and 1 to the PE bit to enable the pull configuration */ reg &= ~(PORT_PCR_PS_MASK | PORT_PCR_ISF_MASK); reg |= PORT_PCR_PE_MASK; break; case PullUp: /* Write 0 ISF bit, 1 to the PE & PS bits to enable the pull up configuration */ reg &= ~(PORT_PCR_ISF_MASK); reg |= (PORT_PCR_PE_MASK | PORT_PCR_PS_MASK); break; default: break; } base->PCR[pinName] = reg; }