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[bsp][lpc55s69]add softi2c (#7221)

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linshire 2023-04-14 09:41:38 +08:00 committed by GitHub
parent a08e930e20
commit 825cdefe70
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5 changed files with 327 additions and 0 deletions
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3
bsp/lpc55sxx/Libraries/drivers/SConscript
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@ -49,6 +49,9 @@ if GetDepend('BSP_USING_I2S'):
if GetDepend('BSP_USING_WM8904'):
src += ['drv_sound_wm8904.c']
if GetDepend('BSP_USING_SOFT_I2C'):
src += ['drv_soft_i2c.c']
path = [cwd,cwd + '/config']
group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)

213
bsp/lpc55sxx/Libraries/drivers/drv_soft_i2c.c Normal file
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@ -0,0 +1,213 @@
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-04-11 linshire the first version
*/
#include <board.h>
#include "drv_soft_i2c.h"
#ifdef RT_USING_I2C
#define LOG_TAG "drv.i2c"
#include <drv_log.h>
#if !defined(BSP_USING_I2C1) && !defined(BSP_USING_I2C2) && !defined(BSP_USING_I2C3) && !defined(BSP_USING_I2C4)
#error "Please define at least one BSP_USING_I2Cx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
static const struct lpc55s69_soft_i2c_config soft_i2c_config[] =
{
#ifdef BSP_USING_SOFT_I2C1
SOFT_I2C1_BUS_CONFIG,
#endif
#ifdef BSP_USING_SOFT_I2C2
SOFT_I2C2_BUS_CONFIG,
#endif
};
static struct lpc55s69_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0])];
/**
* This function initializes the i2c pin.
*
* @param lpc55s69 i2c dirver class.
*/
static void lpc55s69_i2c_gpio_init(struct lpc55s69_i2c *i2c)
{
struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)i2c->ops.data;
rt_pin_mode(cfg->scl, PIN_MODE_OUTPUT_OD);
rt_pin_mode(cfg->sda, PIN_MODE_OUTPUT_OD);
rt_pin_write(cfg->scl, PIN_HIGH);
rt_pin_write(cfg->sda, PIN_HIGH);
}
/**
* This function sets the sda pin.
*
* @param lpc55s69 config class.
* @param The sda pin state.
*/
static void lpc55s69_set_sda(void *data, rt_int32_t state)
{
struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)data;
if (state)
{
rt_pin_write(cfg->sda, PIN_HIGH);
}
else
{
rt_pin_write(cfg->sda, PIN_LOW);
}
}
/**
* This function sets the scl pin.
*
* @param lpc55s69 config class.
* @param The scl pin state.
*/
static void lpc55s69_set_scl(void *data, rt_int32_t state)
{
struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)data;
if (state)
{
rt_pin_write(cfg->scl, PIN_HIGH);
}
else
{
rt_pin_write(cfg->scl, PIN_LOW);
}
}
/**
* This function gets the sda pin state.
*
* @param The sda pin state.
*/
static rt_int32_t lpc55s69_get_sda(void *data)
{
struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)data;
return rt_pin_read(cfg->sda);
}
/**
* This function gets the scl pin state.
*
* @param The scl pin state.
*/
static rt_int32_t lpc55s69_get_scl(void *data)
{
struct lpc55s69_soft_i2c_config* cfg = (struct lpc55s69_soft_i2c_config*)data;
return rt_pin_read(cfg->scl);
}
/**
* The time delay function.
*
* @param microseconds.
*/
static void lpc55s69_udelay(rt_uint32_t us)
{
rt_uint32_t ticks;
rt_uint32_t told, tnow, tcnt = 0;
rt_uint32_t reload = SysTick->LOAD;
ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
told = SysTick->VAL;
while (1)
{
tnow = SysTick->VAL;
if (tnow != told)
{
if (tnow < told)
{
tcnt += told - tnow;
}
else
{
tcnt += reload - tnow + told;
}
told = tnow;
if (tcnt >= ticks)
{
break;
}
}
}
}
static const struct rt_i2c_bit_ops lpc55s69_bit_ops_default =
{
.data = RT_NULL,
.set_sda = lpc55s69_set_sda,
.set_scl = lpc55s69_set_scl,
.get_sda = lpc55s69_get_sda,
.get_scl = lpc55s69_get_scl,
.udelay = lpc55s69_udelay,
.delay_us = 1,
.timeout = 100
};
/**
* if i2c is locked, this function will unlock it
*
* @param lpc55s69 config class
*
* @return RT_EOK indicates successful unlock.
*/
static rt_err_t lpc55s69_i2c_bus_unlock(const struct lpc55s69_soft_i2c_config *cfg)
{
rt_int32_t i = 0;
if (PIN_LOW == rt_pin_read(cfg->sda))
{
while (i++ < 9)
{
rt_pin_write(cfg->scl, PIN_HIGH);
lpc55s69_udelay(100);
rt_pin_write(cfg->scl, PIN_LOW);
lpc55s69_udelay(100);
}
}
if (PIN_LOW == rt_pin_read(cfg->sda))
{
return -RT_ERROR;
}
return RT_EOK;
}
/* I2C initialization function */
int rt_hw_i2c_init(void)
{
rt_err_t result;
for (rt_size_t i = 0; i < sizeof(i2c_obj) / sizeof(struct lpc55s69_i2c); i++)
{
i2c_obj[i].ops = lpc55s69_bit_ops_default;
i2c_obj[i].ops.data = (void*)&soft_i2c_config[i];
i2c_obj[i].i2c2_bus.priv = &i2c_obj[i].ops;
lpc55s69_i2c_gpio_init(&i2c_obj[i]);
result = rt_i2c_bit_add_bus(&i2c_obj[i].i2c2_bus, soft_i2c_config[i].bus_name);
RT_ASSERT(result == RT_EOK);
lpc55s69_i2c_bus_unlock(&soft_i2c_config[i]);
LOG_D("software simulation %s init done, pin scl: %d, pin sda %d",
soft_i2c_config[i].bus_name,
soft_i2c_config[i].scl,
soft_i2c_config[i].sda);
}
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_i2c_init);
#endif /* RT_USING_I2C */

52
bsp/lpc55sxx/Libraries/drivers/drv_soft_i2c.h Normal file
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@ -0,0 +1,52 @@
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-04-11 linshrie first version
*/
#ifndef __DRV_I2C__
#define __DRV_I2C__
#include <rtthread.h>
#include <rthw.h>
#include <rtdevice.h>
/* lpc55s69 config class */
struct lpc55s69_soft_i2c_config
{
rt_uint8_t scl;
rt_uint8_t sda;
const char *bus_name;
};
/* lpc55s69 i2c dirver class */
struct lpc55s69_i2c
{
struct rt_i2c_bit_ops ops;
struct rt_i2c_bus_device i2c2_bus;
};
#ifdef BSP_USING_SOFT_I2C1
#define SOFT_I2C1_BUS_CONFIG \
{ \
.scl = BSP_SOFT_I2C1_SCL_PIN, \
.sda = BSP_SOFT_I2C1_SCL_PIN, \
.bus_name = "i2c1", \
}
#endif
#ifdef BSP_USING_SOFT_I2C2
#define SOFT_I2C2_BUS_CONFIG \
{ \
.scl = BSP_SOFT_I2C2_SCL_PIN, \
.sda = BSP_SOFT_I2C2_SCL_PIN, \
.bus_name = "i2c2", \
}
#endif /*BSP_USING_I2C2*/
int rt_hw_i2c_init(void);
#endif

42
bsp/lpc55sxx/lpc55s69_nxp_evk/board/Kconfig
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@ -116,6 +116,48 @@ menu "On-chip Peripheral Drivers"
endchoice
endif
endif
menuconfig BSP_USING_SOFT_I2C
bool "Enable I2C Bus"
select RT_USING_I2C
select RT_USING_I2C_BITOPS
select RT_USING_PIN
default n
if BSP_USING_SOFT_I2C
config BSP_USING_SOFT_I2C1
bool "Enable I2C1 Bus (software simulation)"
default n
if BSP_USING_SOFT_I2C1
comment "Notice: PB10 --> 26; PB11 --> 27"
config BSP_SOFT_I2C1_SCL_PIN
int "i2c1 SCL pin number"
range 0 79
default 26
config BSP_SOFT_I2C1_SDA_PIN
int "i2c1 SDA pin number"
range 0 79
default 27
endif
config BSP_USING_SOFT_I2C2
bool "Enable I2C2 Bus (software simulation)"
default n
if BSP_USING_SOFT_I2C2
comment "Notice: PC1 --> 33; PC0 --> 32"
config BSP_SOFT_I2C2_SCL_PIN
int "i2c2 SCL pin number"
range 0 79
default 32
config BSP_SOFT_I2C2_SDA_PIN
int "i2c2 SDA pin number"
range 0 79
default 33
endif
endif
menuconfig BSP_USING_SPI
config BSP_USING_SPI

17
bsp/lpc55sxx/tools/sdk_dist.py
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@ -18,3 +18,20 @@ def dist_do_building(BSP_ROOT, dist_dir):
print("=> copy bsp library")
bsp_copy_files(os.path.join(library_path, rtconfig.BSP_LIBRARY_TYPE), os.path.join(library_dir, rtconfig.BSP_LIBRARY_TYPE))
shutil.copyfile(os.path.join(library_path, 'Kconfig'), os.path.join(library_dir, 'Kconfig'))
# change RTT_ROOT in Kconfig
if not os.path.isfile(os.path.join(dist_dir, 'Kconfig')):
return
with open(os.path.join(dist_dir, 'Kconfig'), 'r') as f:
data = f.readlines()
with open(os.path.join(dist_dir, 'Kconfig'), 'w') as f:
found = 0
for line in data:
if line.find('RTT_ROOT') != -1:
found = 1
if line.find('../Libraries') != -1 and found:
position = line.find('../Libraries')
line = line[0:position] + 'Libraries/Kconfig"\n'
found = 0
f.write(line)