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https://github.com/RIOT-OS/RIOT.git
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106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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* Copyright (C) 2018 Gunar Schorcht
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup drivers_mcp23x17
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* @ingroup sys_auto_init_saul
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* @brief Auto initialization for Microchip MCP23x17 I/O expanders
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* @author Gunar Schorcht <gunar@schorcht.net>
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* @file
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* @{
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*/
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#if MODULE_MCP23X17 && MODULE_SAUL_GPIO
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#include "assert.h"
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#include "log.h"
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#include "saul_reg.h"
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#include "saul/periph.h"
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#include "mcp23x17.h"
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#include "mcp23x17_params.h"
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/**
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* @brief Number of configured MCP23x17 I/O expander devices
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*/
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#define MCP23X17_NUM ARRAY_SIZE(mcp23x17_params)
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/**
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* @brief Number of configured SAUL MCP23x17 I/O pins
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*/
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#define MCP23X17_SAUL_GPIO_NUMOF ARRAY_SIZE(mcp23x17_saul_gpio_params)
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/**
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* @brief Number of saul info
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*/
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#define MCP23X17_INFO_NUM ARRAY_SIZE(mcp23x17_saul_info)
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/**
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* @brief Allocate the memory for the MCP23x17 I/O expander device descriptors
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*/
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mcp23x17_t mcp23x17_devs[MCP23X17_NUM];
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/**
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* @brief Allocate the memory for MCP23x17 I/O expander SAUL registry entries
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*/
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static saul_reg_t mcp23x17_saul_reg_entries[MCP23X17_SAUL_GPIO_NUMOF];
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/**
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* @brief Reference the MCP23x17 I/O expander input mode driver struct
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*/
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extern saul_driver_t mcp23x17_gpio_in_saul_driver;
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/**
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* @brief Reference to the MCP23x17 I/O expander output mode driver struct
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*/
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extern saul_driver_t mcp23x17_gpio_out_saul_driver;
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void auto_init_mcp23x17(void)
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{
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for (unsigned int i = 0; i < MCP23X17_NUM; i++) {
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LOG_DEBUG("[auto_init_saul] initializing MCP23x17 I/O expander dev #%u\n", i);
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mcp23x17_init(&mcp23x17_devs[i], &mcp23x17_params[i]);
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}
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for (unsigned int i = 0; i < MCP23X17_SAUL_GPIO_NUMOF; i++) {
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const mcp23x17_saul_gpio_params_t *p = &mcp23x17_saul_gpio_params[i];
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LOG_DEBUG("[auto_init_saul] initializing MCP23x17 GPIO #%u\n", i);
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/* check the MCP23x17 device index */
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assert(p->dev < MCP23X17_NUM);
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/* check the MCP23x17 device index */
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assert(p->gpio.pin < MCP23X17_GPIO_PIN_NUM);
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mcp23x17_saul_reg_entries[i].dev = (void *)p;
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mcp23x17_saul_reg_entries[i].name = p->gpio.name;
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if ((p->gpio.mode == GPIO_IN) ||
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(p->gpio.mode == GPIO_IN_PD) ||
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(p->gpio.mode == GPIO_IN_PU)) {
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mcp23x17_saul_reg_entries[i].driver = &mcp23x17_gpio_in_saul_driver;
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}
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else {
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mcp23x17_saul_reg_entries[i].driver = &mcp23x17_gpio_out_saul_driver;
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}
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/* initialize the MCP23x17 pin */
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mcp23x17_gpio_init(&mcp23x17_devs[p->dev], p->gpio.pin, p->gpio.mode);
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/* set initial pin MCP23x17 state if configured */
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if (p->gpio.flags & (SAUL_GPIO_INIT_CLEAR | SAUL_GPIO_INIT_SET)) {
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phydat_t s;
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s.val[0] = (p->gpio.flags & SAUL_GPIO_INIT_SET);
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mcp23x17_saul_reg_entries[i].driver->write(p, &s);
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}
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/* add to registry */
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saul_reg_add(&(mcp23x17_saul_reg_entries[i]));
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}
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}
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#else
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typedef int dont_be_pedantic;
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#endif /* MODULE_MCP23x17 && MODULE_SAUL_GPIO */
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