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