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AVR32: Software I2C driver: Initial working commit (#8324) 

implemented the software I2C drivers for the AVR32 target.
This commit is contained in:
Raman 2023-12-09 21:16:12 +05:30 committed by GitHub
parent e843561e46
commit fe11e85eea
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 259 additions and 30 deletions
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24
bsp/avr32/at32uc3a0256/.config
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@ -8,6 +8,7 @@
#
CONFIG_RT_NAME_MAX=8
# CONFIG_RT_USING_ARCH_DATA_TYPE is not set
# CONFIG_RT_USING_NANO is not set
# CONFIG_RT_USING_AMP is not set
# CONFIG_RT_USING_SMP is not set
CONFIG_RT_CPUS_NR=1
@ -34,10 +35,7 @@ CONFIG_RT_TIMER_THREAD_STACK_SIZE=512
# CONFIG_RT_KSERVICE_USING_TINY_SIZE is not set
# CONFIG_RT_USING_TINY_FFS is not set
# CONFIG_RT_KPRINTF_USING_LONGLONG is not set
CONFIG_RT_USING_DEBUG=y
CONFIG_RT_DEBUGING_COLOR=y
# CONFIG_RT_DEBUGING_CONTEXT is not set
# CONFIG_RT_DEBUGING_INIT is not set
# CONFIG_RT_USING_DEBUG is not set
#
# Inter-Thread communication
@ -206,6 +204,12 @@ CONFIG_RT_LIBC_TZ_DEFAULT_SEC=0
# CONFIG_RT_USING_LWIP is not set
# CONFIG_RT_USING_AT is not set
#
# Memory protection
#
# CONFIG_RT_USING_MEM_PROTECTION is not set
# CONFIG_RT_USING_HW_STACK_GUARD is not set
#
# Utilities
#
@ -218,17 +222,6 @@ CONFIG_RT_LIBC_TZ_DEFAULT_SEC=0
# CONFIG_RT_USING_RT_LINK is not set
# CONFIG_RT_USING_VBUS is not set
#
# Memory management
#
# CONFIG_RT_USING_MEMBLOCK is not set
#
# Memory protection
#
# CONFIG_RT_USING_MEM_PROTECTION is not set
# CONFIG_RT_USING_HW_STACK_GUARD is not set
#
# RT-Thread Utestcases
#
@ -1014,3 +1007,4 @@ CONFIG_BSP_UART1_RX_PIN_5=y
# CONFIG_BSP_UART1_RX_PIN_96 is not set
CONFIG_BSP_UART1_RX_PIN=5
CONFIG_BSP_UART1_RX_PIN_FUNCTION=0
# CONFIG_BSP_USING_SOFT_I2C is not set

20
bsp/avr32/at32uc3a0256/Kconfig
View File

@ -132,5 +132,25 @@ menu "On-chip Peripheral Drivers"
default 1 if BSP_UART1_RX_PIN_96
endif
endif
menuconfig BSP_USING_SOFT_I2C
bool "Enable I2C BUS (software simulation)"
default n
select RT_USING_I2C
select RT_USING_I2C_BITOPS
select RT_USING_PIN
if BSP_USING_SOFT_I2C
config BSP_USING_SOFT_I2C1
bool "Enable I2C1 Bus (software simulation)"
default n
if BSP_USING_SOFT_I2C1
config BSP_SOFT_I2C1_SCL_PIN
int "I2C1 SCL pin number (GP)"
default 30
config BSP_SOFT_I2C1_SDA_PIN
int "I2C1 SDA pin number (GP)"
default 29
endif
endif
endmenu
endmenu

6
bsp/avr32/at32uc3a0256/board.c
View File

@ -8,6 +8,7 @@
* 2010-03-30 Kyle First version
* 2023-10-13 Raman Gopalan Move UART specific code sections into the drv_uart files
* 2023-10-20 Raman Gopalan Initialize GPIO sub-system
* 2023-12-01 Raman Gopalan Initialize software I2C sub-system
*/
#include <rtthread.h>
@ -18,6 +19,7 @@
#include "intc.h"
#include "drv_uart.h"
#include "drv_gpio.h"
#include "drv_soft_i2c.h"
/**
* System tick interrupt handler.
@ -78,6 +80,10 @@ void rt_hw_board_init(void)
rt_hw_gpio_init();
#endif
#ifdef BSP_USING_SOFT_I2C
rt_sw_i2c_init();
#endif
#ifdef RT_USING_CONSOLE
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif

11
bsp/avr32/at32uc3a0256/rtconfig.h
View File

@ -24,8 +24,6 @@
/* kservice optimization */
#define RT_USING_DEBUG
#define RT_DEBUGING_COLOR
/* Inter-Thread communication */
@ -103,15 +101,12 @@
/* Network */
/* Utilities */
/* Memory management */
/* Memory protection */
/* Utilities */
/* RT-Thread Utestcases */

14
bsp/avr32/drivers/SConscript
View File

@ -7,16 +7,16 @@ cwd = GetCurrentDir()
# add the general drivers.
src = []
if GetDepend(['RT_USING_PIN']):
if GetDepend(['BSP_USING_PIN']):
src += ['drv_gpio.c']
if GetDepend(['RT_USING_SERIAL']):
if GetDepend(['RT_USING_SERIAL_V2']):
src += ['drv_uart_v2.c']
else:
src += ['drv_uart.c']
if GetDepend(['BSP_USING_UART']):
src += ['drv_uart.c']
path = [cwd]
if GetDepend(['BSP_USING_SOFT_I2C']):
src += ['drv_soft_i2c.c']
path = [cwd]
group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)

168
bsp/avr32/drivers/drv_soft_i2c.c Normal file
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@ -0,0 +1,168 @@
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023/12/01 Raman Gopalan First version
*/
#include "drv_soft_i2c.h"
#ifdef BSP_USING_SOFT_I2C
#define DBG_LEVEL DBG_LOG
#include <rtdbg.h>
#define LOG_TAG "DRV.I2C"
static const struct avr32_soft_i2c_config soft_i2c_config[] =
{
#ifdef BSP_USING_SOFT_I2C1
I2C1_BUS_CONFIG,
#endif
};
static struct avr32_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0])];
/**
* This function initializes the I2C pin.
*
* @param AVR32 I2C driver class.
*/
static void avr32_i2c_gpio_init(struct avr32_i2c *i2c)
{
struct avr32_soft_i2c_config* cfg = (struct avr32_soft_i2c_config*)i2c->ops.data;
rt_pin_mode(cfg->scl, PIN_MODE_OUTPUT_OD);
gpio_set_gpio_open_drain_pin(cfg->scl);
rt_pin_mode(cfg->sda, PIN_MODE_OUTPUT_OD);
gpio_set_gpio_open_drain_pin(cfg->sda);
}
/**
* This function sets the SDA pin.
*
* @param AVR32 config class.
* @param The SDA pin state.
*/
static void avr32_set_sda(void *data, rt_int32_t state)
{
struct avr32_soft_i2c_config* cfg = (struct avr32_soft_i2c_config*)data;
if (state)
{
gpio_set_gpio_open_drain_pin(cfg->sda);
}
else
{
gpio_clr_gpio_open_drain_pin(cfg->sda);
}
}
/**
* This function sets the SCL pin.
*
* @param AVR32 config class.
* @param The SCL pin state.
*/
static void avr32_set_scl(void *data, rt_int32_t state)
{
struct avr32_soft_i2c_config* cfg = (struct avr32_soft_i2c_config*)data;
if (state)
{
gpio_set_gpio_open_drain_pin(cfg->scl);
}
else
{
gpio_clr_gpio_open_drain_pin(cfg->scl);
}
}
/**
* This function gets the SDA pin state.
*
* @param The SDA pin state.
*/
static rt_int32_t avr32_get_sda(void *data)
{
struct avr32_soft_i2c_config* cfg = (struct avr32_soft_i2c_config*)data;
return gpio_get_gpio_open_drain_pin_output_value(cfg->sda);
}
/**
* This function gets the SCL pin state.
*
* @param The SCL pin state.
*/
static rt_int32_t avr32_get_scl(void *data)
{
struct avr32_soft_i2c_config* cfg = (struct avr32_soft_i2c_config*)data;
return gpio_get_gpio_open_drain_pin_output_value(cfg->scl);
}
static const struct rt_i2c_bit_ops avr32_bit_ops_default =
{
.data = RT_NULL,
.set_sda = avr32_set_sda,
.set_scl = avr32_set_scl,
.get_sda = avr32_get_sda,
.get_scl = avr32_get_scl,
.udelay = rt_hw_us_delay,
.delay_us = 1,
.timeout = 100
};
/**
* If I2C is locked, this function will unlock it.
*
* @param AVR32 config class
*
* @return RT_EOK indicates successful unlock.
*/
static rt_err_t avr32_i2c_bus_unlock(const struct avr32_soft_i2c_config *cfg)
{
rt_int32_t i = 0;
if (PIN_LOW == gpio_get_gpio_open_drain_pin_output_value(cfg->sda))
{
while (i++ < 9)
{
gpio_set_gpio_open_drain_pin(cfg->scl);
rt_hw_us_delay(100);
gpio_clr_gpio_open_drain_pin(cfg->scl);
rt_hw_us_delay(100);
}
}
if (PIN_LOW == gpio_get_gpio_open_drain_pin_output_value(cfg->sda))
{
return -RT_ERROR;
}
return RT_EOK;
}
/* I2C initialization function */
int rt_sw_i2c_init(void)
{
rt_err_t result;
rt_size_t i;
for (i = 0; i < sizeof(i2c_obj) / sizeof(struct avr32_i2c); i++)
{
i2c_obj[i].ops = avr32_bit_ops_default;
i2c_obj[i].ops.data = (void*)&soft_i2c_config[i];
i2c_obj[i].i2c2_bus.priv = &i2c_obj[i].ops;
avr32_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);
avr32_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;
}
#endif /* BSP_USING_SOFT_I2C */

46
bsp/avr32/drivers/drv_soft_i2c.h Normal file
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@ -0,0 +1,46 @@
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023/12/01 Raman Gopalan First version
*/
#ifndef __DRV_SOFT_I2C__
#define __DRV_SOFT_I2C__
#include <rtdevice.h>
#include "drv_gpio.h"
#include "gpio.h"
#ifdef BSP_USING_SOFT_I2C
/* AVR32 software I2C driver class */
struct avr32_i2c
{
struct rt_i2c_bit_ops ops;
struct rt_i2c_bus_device i2c2_bus;
};
/* AVR32 config class */
struct avr32_soft_i2c_config
{
rt_uint8_t scl;
rt_uint8_t sda;
const char *bus_name;
};
#ifdef BSP_USING_SOFT_I2C1
#define I2C1_BUS_CONFIG \
{ \
.scl = BSP_SOFT_I2C1_SCL_PIN, \
.sda = BSP_SOFT_I2C1_SDA_PIN, \
.bus_name = "i2c1", \
}
#endif
int rt_sw_i2c_init(void);
#endif /* BSP_USING_SOFT_I2C */
#endif /* #ifndef __DRV_SOFT_I2C__ */