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/*
* Copyright (c) 2022-2024, Xiaohua Semiconductor Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-12-30 CDT first version
*/
/*
* 程序清单：这是一个 I2C 设备使用例程
* 例程导出了 pcf8563 命令到控制终端
* 命令调用格式：i2c_pcf8563_sample i2c1
* 命令解释：命令第二个参数是要使用的I2C总线设备名称，为空则使用默认的I2C总线设备
* 程序功能：通过 I2C 设备读取时间信息并打印
*/
#include <rtthread.h>
#include <rtdevice.h>
#if defined(BSP_USING_I2C)
#define PFC8563_I2C_BUS_NAME "i2c1" /* I2C总线设备名称 */
#define PFC8563_ADDR 0x51 /* 从机地址 */
#define PFC8563_REG_SEC 0x02 /* 校准命令 */
#define PFC8563_REG_CTRL_SR1 0x00 /* 校准命令 */
#define PFC8563_TIME_LEN 0x7 /* 获取数据长度 */
#define RTC_DEC2BCD(__DATA__) ((((__DATA__) / 10U) << 4U) + ((__DATA__) % 10U))
#define RTC_BCD2DEC(__DATA__) ((((__DATA__) >> 4U) * 10U) + ((__DATA__) & 0x0FU))
static struct rt_i2c_bus_device *i2c_bus = RT_NULL; /* I2C总线设备句柄 */
static rt_bool_t initialized = RT_FALSE; /* 传感器初始化状态 */
/* 写传感器寄存器 */
static rt_err_t write_regs(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8_t *data, rt_uint8_t len)
{
rt_uint8_t buf[16 + 1];
struct rt_i2c_msg msgs;
rt_uint32_t buf_size = 1;
buf[0] = reg; // cmd
if (data != RT_NULL)
{
memcpy(&buf[1], data, len);
buf_size += len;
}
msgs.addr = PFC8563_ADDR;
msgs.flags = RT_I2C_WR;
msgs.buf = buf;
msgs.len = buf_size;
/* 调用I2C设备接口传输数据 */
if (rt_i2c_transfer(bus, &msgs, 1) == 1)
{
return RT_EOK;
}
else
{
rt_kprintf("write regs failed!\n");
return -RT_ERROR;
}
}
/* 读传感器寄存器数据 */
static rt_err_t read_regs(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8_t *data, rt_uint8_t len)
{
struct rt_i2c_msg msgs[2];
rt_uint8_t buf[16 + 1];
rt_uint32_t buf_size = 1;
buf[0] = reg; // cmd
msgs[0].addr = PFC8563_ADDR;
msgs[0].flags = RT_I2C_WR;
msgs[0].buf = buf;
msgs[0].len = buf_size;
msgs[1].addr = PFC8563_ADDR;
msgs[1].flags = RT_I2C_RD;
msgs[1].buf = data;
msgs[1].len = len;
/* 调用I2C设备接口传输数据 */
if (rt_i2c_transfer(bus, &msgs[0], 2) == 2)
{
return RT_EOK;
}
else
{
rt_kprintf("read regs failed!\n");
return -RT_ERROR;
}
}
static void pcf8563_init(const char *name)
{
rt_uint8_t temp[16];
/* 查找I2C总线设备，获取I2C总线设备句柄 */
i2c_bus = (struct rt_i2c_bus_device *)rt_device_find(name);
if (i2c_bus == RT_NULL)
{
rt_kprintf("can't find %s device!\n", name);
}
else
{
rt_thread_mdelay(500);
temp[0] = 0x28U;
write_regs(i2c_bus, PFC8563_REG_CTRL_SR1, temp, 1);
rt_thread_mdelay(100);
temp[0] = 0x08U;
write_regs(i2c_bus, PFC8563_REG_CTRL_SR1, temp, 1);
rt_thread_mdelay(100);
temp[0] = RTC_DEC2BCD(55);
temp[1] = RTC_DEC2BCD(59);
temp[2] = RTC_DEC2BCD(23);
temp[3] = RTC_DEC2BCD(1);
temp[4] = RTC_DEC2BCD(3);
temp[5] = RTC_DEC2BCD(1);
temp[6] = RTC_DEC2BCD(20);
write_regs(i2c_bus, PFC8563_REG_SEC, temp, PFC8563_TIME_LEN);
rt_thread_mdelay(100);
initialized = RT_TRUE;
}
}
static void serial_thread_entry(void *parameter)
{
rt_uint8_t time[16];
memset(time, 0, 16);
rt_thread_mdelay(500);
rt_thread_mdelay(500);
while (1)
{
// if (RT_EOK == read_regs(i2c_bus, PFC8563_REG_SEC, time, PFC8563_TIME_LEN))
if (RT_EOK == read_regs(i2c_bus, PFC8563_REG_SEC, time, 1))
{
time[0] &= 0x7FU;
time[1] &= 0x7FU;
time[2] &= 0x3FU;
time[3] &= 0x3FU;
time[4] &= 0x7U;
time[5] &= 0x1FU;
time[6] &= 0xFFU;
/* Print current date and time */
rt_kprintf("Time: 20%02d/%02d/%02d %02d:%02d:%02d\n", RTC_BCD2DEC(time[6]), RTC_BCD2DEC(time[5]),
RTC_BCD2DEC(time[3]), RTC_BCD2DEC(time[2]), RTC_BCD2DEC(time[1]), RTC_BCD2DEC(time[0]));
}
else
{
rt_kprintf("Get time failed!\n");
}
rt_thread_mdelay(100);
}
}
void i2c_pcf8563_sample(int argc, char *argv[])
{
char bus_name[RT_NAME_MAX];
if (argc == 2)
{
rt_strncpy(bus_name, argv[1], RT_NAME_MAX);
}
else
{
rt_strncpy(bus_name, PFC8563_I2C_BUS_NAME, RT_NAME_MAX);
}
if (!initialized)
{
/* 传感器初始化 */
pcf8563_init(bus_name);
}
if (initialized)
{
/* 创建 serial 线程 */
rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 1024, 25, 10);
/* 创建成功则启动线程 */
if (thread != RT_NULL)
{
rt_thread_startup(thread);
}
else
{
rt_kprintf("startup thread failed!\n");
}
}
else
{
rt_kprintf("initialize sensor failed!\n");
}
}
/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(i2c_pcf8563_sample, i2c aht10 sample);
#endif
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