242 lines
7.5 KiB
C
242 lines
7.5 KiB
C
/*
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ChibiOS - Copyright (C) 2014-2015 Fabio Utzig
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file MK20D5/pal_lld.c
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* @brief PAL subsystem low level driver.
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*
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* @addtogroup PAL
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* @{
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*/
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#include "osal.h"
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#include "hal.h"
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#if HAL_USE_PAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/**
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* @brief Reads a logical state from an I/O pad.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @return The logical state.
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* @retval PAL_LOW low logical state.
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* @retval PAL_HIGH high logical state.
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*
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* @notapi
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*/
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uint8_t _pal_lld_readpad(ioportid_t port,
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uint8_t pad) {
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return (port->PDIR & ((uint32_t) 1 << pad)) ? PAL_HIGH : PAL_LOW;
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}
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/**
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* @brief Writes a logical state on an output pad.
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* @note This function is not meant to be invoked directly by the
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* application code.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @param[in] bit logical value, the value must be @p PAL_LOW or
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* @p PAL_HIGH
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*
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* @notapi
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*/
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void _pal_lld_writepad(ioportid_t port,
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uint8_t pad,
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uint8_t bit) {
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if (bit == PAL_HIGH)
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port->PDOR |= ((uint32_t) 1 << pad);
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else
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port->PDOR &= ~((uint32_t) 1 << pad);
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}
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/**
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* @brief Pad mode setup.
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* @details This function programs a pad with the specified mode.
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* @note The @ref PAL provides a default software implementation of this
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* functionality, implement this function if can optimize it by using
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* special hardware functionalities or special coding.
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* @note Programming an unknown or unsupported mode is silently ignored.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @param[in] mode pad mode
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*
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* @notapi
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*/
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void _pal_lld_setpadmode(ioportid_t port,
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uint8_t pad,
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iomode_t mode) {
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PORT_TypeDef *portcfg = NULL;
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chDbgAssert(pad <= 31, "pal_lld_setpadmode() #1, invalid pad");
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if (mode == PAL_MODE_OUTPUT_PUSHPULL)
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port->PDDR |= ((uint32_t) 1 << pad);
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else
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port->PDDR &= ~((uint32_t) 1 << pad);
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if (port == IOPORT1)
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portcfg = PORTA;
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else if (port == IOPORT2)
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portcfg = PORTB;
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else if (port == IOPORT3)
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portcfg = PORTC;
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else if (port == IOPORT4)
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portcfg = PORTD;
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else if (port == IOPORT5)
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portcfg = PORTE;
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chDbgAssert(portcfg != NULL, "pal_lld_setpadmode() #2, invalid port");
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switch (mode) {
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case PAL_MODE_RESET:
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case PAL_MODE_INPUT:
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case PAL_MODE_OUTPUT_PUSHPULL:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1);
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break;
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case PAL_MODE_OUTPUT_OPENDRAIN:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1) |
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PORTx_PCRn_ODE;
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break;
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case PAL_MODE_INPUT_PULLUP:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1) |
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PORTx_PCRn_PE |
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PORTx_PCRn_PS;
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break;
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case PAL_MODE_INPUT_PULLDOWN:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1) |
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PORTx_PCRn_PE;
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break;
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case PAL_MODE_UNCONNECTED:
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case PAL_MODE_INPUT_ANALOG:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(0);
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break;
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case PAL_MODE_ALTERNATIVE_1:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(1);
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break;
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case PAL_MODE_ALTERNATIVE_2:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(2);
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break;
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case PAL_MODE_ALTERNATIVE_3:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(3);
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break;
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case PAL_MODE_ALTERNATIVE_4:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(4);
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break;
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case PAL_MODE_ALTERNATIVE_5:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(5);
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break;
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case PAL_MODE_ALTERNATIVE_6:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(6);
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break;
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case PAL_MODE_ALTERNATIVE_7:
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portcfg->PCR[pad] = PIN_MUX_ALTERNATIVE(7);
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break;
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}
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}
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Kinetis I/O ports configuration.
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* @details Ports A-E clocks enabled.
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*
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* @param[in] config the Kinetis ports configuration
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*
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* @notapi
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*/
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void _pal_lld_init(const PALConfig *config) {
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int i, j;
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/* Enable clocking on all Ports */
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SIM->SCGC5 |= SIM_SCGC5_PORTA |
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SIM_SCGC5_PORTB |
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SIM_SCGC5_PORTC |
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SIM_SCGC5_PORTD |
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SIM_SCGC5_PORTE;
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/* Initial PORT and GPIO setup */
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for (i = 0; i < TOTAL_PORTS; i++) {
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for (j = 0; j < PADS_PER_PORT; j++) {
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pal_lld_setpadmode(config->ports[i].port,
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j,
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config->ports[i].pads[j]);
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}
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}
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}
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/**
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* @brief Pads mode setup.
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* @details This function programs a pads group belonging to the same port
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* with the specified mode.
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*
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* @param[in] port the port identifier
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* @param[in] mask the group mask
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* @param[in] mode the mode
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*
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* @notapi
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*/
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void _pal_lld_setgroupmode(ioportid_t port,
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ioportmask_t mask,
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iomode_t mode) {
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int i;
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(void)mask;
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for (i = 0; i < PADS_PER_PORT; i++) {
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pal_lld_setpadmode(port, i, mode);
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}
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}
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#endif /* HAL_USE_PAL */
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/** @} */
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