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drivers/mcp23x17: SAUL integration

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This commit is contained in:
Gunar Schorcht 2021-12-05 17:22:17 +01:00
parent a5da14835d
commit a23a849aeb
4 changed files with 114 additions and 2 deletions
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4
drivers/mcp23x17/include/mcp23x17_params.h
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@ -123,7 +123,7 @@ extern "C" {
#define MCP23X17_SAUL_GPIO_PARAMS { \
.dev = 0, \
.gpio = { \
.name = "PA0 Input", \
.name = "MCP23x17_0 PA0 Input", \
.pin = MCP23X17_GPIO_PIN(0, 0), \
.mode = GPIO_IN, \
.flags = 0, \
@ -132,7 +132,7 @@ extern "C" {
{ \
.dev = 0, \
.gpio = { \
.name = "PB5 Output", \
.name = "MCP23x17_0 PB5 Output", \
.pin = MCP23X17_GPIO_PIN(1, 5), \
.mode = GPIO_OUT, \
.flags = SAUL_GPIO_INIT_CLEAR, \

105
drivers/saul/init_devs/auto_init_mcp23x17.c Normal file
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@ -0,0 +1,105 @@
/*
* 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.
*/
/**
* @ingroup drivers_mcp23x17
* @ingroup sys_auto_init_saul
* @brief Auto initialization for Microchip MCP23x17 I/O expanders
* @author Gunar Schorcht <gunar@schorcht.net>
* @file
* @{
*/
#if MODULE_MCP23X17 && MODULE_SAUL_GPIO
#include "assert.h"
#include "log.h"
#include "saul_reg.h"
#include "saul/periph.h"
#include "mcp23x17.h"
#include "mcp23x17_params.h"
/**
* @brief Number of configured MCP23x17 I/O expander devices
*/
#define MCP23X17_NUM ARRAY_SIZE(mcp23x17_params)
/**
* @brief Number of configured SAUL MCP23x17 I/O pins
*/
#define MCP23X17_SAUL_GPIO_NUMOF ARRAY_SIZE(mcp23x17_saul_gpio_params)
/**
* @brief Number of saul info
*/
#define MCP23X17_INFO_NUM ARRAY_SIZE(mcp23x17_saul_info)
/**
* @brief Allocate the memory for the MCP23x17 I/O expander device descriptors
*/
mcp23x17_t mcp23x17_devs[MCP23X17_NUM];
/**
* @brief Allocate the memory for MCP23x17 I/O expander SAUL registry entries
*/
static saul_reg_t mcp23x17_saul_reg_entries[MCP23X17_SAUL_GPIO_NUMOF];
/**
* @brief Reference the MCP23x17 I/O expander input mode driver struct
*/
extern saul_driver_t mcp23x17_gpio_in_saul_driver;
/**
* @brief Reference to the MCP23x17 I/O expander output mode driver struct
*/
extern saul_driver_t mcp23x17_gpio_out_saul_driver;
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]);
}
for (unsigned int i = 0; i < MCP23X17_SAUL_GPIO_NUMOF; i++) {
const mcp23x17_saul_gpio_params_t *p = &mcp23x17_saul_gpio_params[i];
LOG_DEBUG("[auto_init_saul] initializing MCP23x17 GPIO #%u\n", i);
/* check the MCP23x17 device index */
assert(p->dev < MCP23X17_NUM);
/* check the MCP23x17 device index */
assert(p->gpio.pin < MCP23X17_GPIO_PIN_NUM);
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 */

4
drivers/saul/init_devs/init.c
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@ -211,6 +211,10 @@ void saul_init_devs(void)
extern void auto_init_max31855(void);
auto_init_max31855();
}
if (IS_USED(MODULE_MCP23X17)) {
extern void auto_init_mcp23x17(void);
auto_init_mcp23x17();
}
if (IS_USED(MODULE_MCP47XX)) {
extern void auto_init_mcp47xx(void);
auto_init_mcp47xx();

3
tests/drivers/saul_drivers/Makefile
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@ -34,6 +34,9 @@ endif
ifneq (,$(filter lpsxxx,$(DRIVERS)))
USEMODULE += lps22hh
endif
ifneq (,$(filter mcp23x17,$(DRIVERS)))
USEMODULE += mcp23x17_i2c
endif
ifneq (,$(filter mhz19,$(DRIVERS)))
USEMODULE += mhz19_uart
endif