原创 开源物联网技术--IIC I/O扩展芯片的软硬件设计分享

Demo位于amaziot_bloom_os_sdk\sample\3rd\1.0_XL9535

Gitee源码地址：https://gitee.com/ning./hongdou

Github源码地址：https://github.com/ayumid/hongdou

编译指令：.\build.bat -l .\amaziot_bloom_os_sdk\sample\3rd\1.0_XL9535

C
//初始化i2c总线
ret = drv_xl9535_i2c_init();

C
RegAddr = 0x00;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 00 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);

C
RegAddr = 0x06;
RegWriteValue = 0xFF;
ret = drv_xl9535_i2c_write(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("write i2c value=0x%x, ret=%d\n", RegWriteValue, ret);

C
int ret = 0;
GPIOConfiguration config = {0};

//创建定时器
OSATimerCreate(&sample_xl9535_int_detect_timer_ref);
//创建中断事件
OSAFlagCreate( &sample_xl9535_int_detect_flg_ref);
Os_Create_HISR(&sample_xl9535_int_detect_hisr, "sample_xl9535_int_detect_hisr", sample_xl9535_detect_handler, 2);
//创建中断处理任务
OSATaskCreate(&sample_xl9535_int_detect_task_ref, sample_xl9535_int_detect_stack_ptr, SAMPLE_XL9535_STACK_SIZE, 100, "detect_task", sample_xl9535_detect_task, NULL);

//初始化int引脚，这里使用70脚 gpio126
config.pinDir = GPIO_IN_PIN;
config.pinEd = GPIO_RISE_EDGE;
config.pinPull = GPIO_PULLUP_ENABLE;
config.isr = sample_xl9535_irq_handler;
GpioInitConfiguration(SAMPLE_GPIO_ISR_PIN_NUM, config);

C
void sample_xl9535_detect_task(void *param)
{
GPIO_ReturnCode ret = 0;
UINT32 value = 0;
OSA_STATUS status = OS_SUCCESS;
UINT32 flag_value = 0;
unsigned char RegAddr = 0;
unsigned char RegWriteValue = 0;
unsigned char RegReadValue0 = 0;
unsigned char RegReadValue1 = 0;
UINT8 down_en = 0;
UINT8 up_en = 0;
UINT8 sig_en = 0;
UINT8 mul_en = 0;
UINT8 read_en = 0;
UINT8 de_en = 0;
UINT8 ck_en = 0;
UINT8 sim_en = 0;
UINT8 gnss_en = 0;
UINT8 nb_en = 0;
UINT8 fourg_en = 0;

//初始化i2c总线
ret = drv_xl9535_i2c_init();
sample_xl9535_catstudio_printf("ql_i2c_init ret %d", ret);

//上电后，读xl9535 io扩展芯片的8个寄存器，测试用
RegAddr = 0x00;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 00 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);
RegAddr = 0x01;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 01 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);
RegAddr = 0x02;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 02 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);
RegAddr = 0x03;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 03 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);
RegAddr = 0x04;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 04 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);
RegAddr = 0x05;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 05 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);
RegAddr = 0x06;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 06 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);
RegAddr = 0x07;
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("read reg 07 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);

//等1s
OSATaskSleep(1 * 200);

//初始化xl0535 io扩展芯片的06 07寄存器，设置所有的io都是输入
RegAddr = 0x06;
RegWriteValue = 0xFF;
ret = drv_xl9535_i2c_write(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("write i2c value=0x%x, ret=%d\n", RegWriteValue, ret);
RegAddr = 0x07;
RegWriteValue = 0xFF;
ret = drv_xl9535_i2c_write(&RegAddr, &RegReadValue0);
sample_xl9535_catstudio_printf("write i2c value=0x%x, ret=%d\n", RegWriteValue, ret);

while(1)
{
// sample_xl9535_catstudio_printf("sample_xl9535_detect_task\r\n");
status = OSAFlagWait(sample_xl9535_int_detect_flg_ref, 0x01, OSA_FLAG_OR_CLEAR, &flag_value, OSA_SUSPEND);

//红豆版，设置了边沿，但是还是会上升沿，下降沿都触发，所以会执行两次
if(flag_value & 0x01)
{
RegAddr = 0x00;
//ret = ql_i2c_read(i2c_no, SAMPLE_I2C_SLAVE_ADDR, RegAddr, &RegReadValue0, 1);
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue0);
// sample_xl9535_catstudio_printf("read reg 00 i2c value=0x%x, ret=%d\n", RegReadValue0, ret);
RegAddr = 0x01;
//ret = ql_i2c_read(i2c_no, SAMPLE_I2C_SLAVE_ADDR, RegAddr, &RegReadValue0, 1);
ret = drv_xl9535_i2c_read(&RegAddr, &RegReadValue1);
// sample_xl9535_catstudio_printf("read reg 01 i2c value=0x%x, ret=%d\n", RegReadValue1, ret);

//寄存器值非默认值，表示有io输入，否则表示是上升沿中断
if(RegReadValue0 != 0xff || RegReadValue1 != 0x07)
{
event_ticks = OSAGetTicks();
int_status = 0;

//判断是那个IO这里使用寄存器值判断，后续可以改为根据位判断
if(RegReadValue1 == DRV_XL9535_BUTTON_DOWN_EN)
{
// sample_xl9535_catstudio_printf("down int");
down_en = 1;
}
else if(RegReadValue1 == DRV_XL9535_BUTTON_UP_EN)
{
// sample_xl9535_catstudio_printf("up int");
up_en = 1;
}
else if(RegReadValue1 == DRV_XL9535_BUTTON_SIG_EN)
{
// sample_xl9535_catstudio_printf("sig int");
sig_en = 1;
}
else if(RegReadValue0 == DRV_XL9535_BUTTON_MUL_EN)
{
// sample_xl9535_catstudio_printf("mul int");
mul_en = 1;
}
else if(RegReadValue0 == DRV_XL9535_BUTTON_READ_EN)
{
// sample_xl9535_catstudio_printf("read int");
read_en = 1;
}
else if(RegReadValue0 == DRV_XL9535_BUTTON_DE_EN)
{
// sample_xl9535_catstudio_printf("de int");
de_en = 1;
}
else if(RegReadValue0 == DRV_XL9535_BUTTON_CK_EN)
{
// sample_xl9535_catstudio_printf("ck int");
ck_en = 1;
}
else if(RegReadValue0 == DRV_XL9535_BUTTON_SIM_EN)
{
// sample_xl9535_catstudio_printf("sim int");
sim_en = 1;
}
else if(RegReadValue0 == DRV_XL9535_BUTTON_GNSS_EN)
{
// sample_xl9535_catstudio_printf("gnss int");
gnss_en = 1;
}
else if(RegReadValue0 == DRV_XL9535_BUTTON_NB_EN)
{
// sample_xl9535_catstudio_printf("nb int");
nb_en = 1;
}
else if(RegReadValue0 == DRV_XL9535_BUTTON_4G_EN)
{
// sample_xl9535_catstudio_printf("4g int");
fourg_en = 1;
}
}
else
{
if(int_status == 0)
{
UINT32 keep_ticks = OSAGetTicks() - event_ticks;

if(keep_ticks > 20)
{
//检测到某个IO被按下后，可以在这里，或者发送信号，消息等去其它任务执行相应操作
// sample_xl9535_catstudio_printf("keep_ticks:%d, event_ticks:%d", keep_ticks, event_ticks);
if(down_en == 1)
{
sample_xl9535_catstudio_printf("down en");
}
else if(up_en == 1)
{
sample_xl9535_catstudio_printf("up en");
}
else if(sig_en == 1)
{
sample_xl9535_catstudio_printf("sig en");
}
else if(mul_en == 1)
{
sample_xl9535_catstudio_printf("mul en");
}
else if(read_en == 1)
{
sample_xl9535_catstudio_printf("read en");
}
else if(de_en == 1)
{
sample_xl9535_catstudio_printf("de en");
}
else if(ck_en == 1)
{
sample_xl9535_catstudio_printf("ck en");
}
else if(sim_en == 1)
{
sample_xl9535_catstudio_printf("sim en");
}
else if(gnss_en == 1)
{
sample_xl9535_catstudio_printf("gnss en");
}
else if(nb_en == 1)
{
sample_xl9535_catstudio_printf("nb en");
}
else if(fourg_en == 1)
{
sample_xl9535_catstudio_printf("4g en");
}
}
down_en = 0;
up_en = 0;
sig_en = 0;
mul_en = 0;
read_en = 0;
de_en = 0;
ck_en = 0;
sim_en = 0;
gnss_en = 0;
nb_en = 0;
fourg_en = 0;
}
int_status = 1;
}

}
}
}