LIS2DH12 FIFO水印中断配置

你好，
我正在使用以下寄存器设置来配置LIS2DH12以在INT1引脚上产生FIFO水印中断，但是INT1引脚始终保持低电平，我不确定我缺少什么。
INT1直接连接到设置为输入的MCU GPIO引脚。
以下是我目前使用的寄存器设置：
//启用BDU，CTRL_REG4 = 0x80
LIS2DH12_SetBDU（LIS2DH12_ENABLE）;
//设置为正常功耗模式，10位ACC数据，CTRL_REG1 = 0x00，CTRL_REG4 = 0x80
LIS2DH12_SetMode（LIS2DH12_NORMAL）;
//满量程选择，CTRL_REG4 = 0x80
LIS2DH12_SetFullScale（LIS2DH12_FULLSCALE_2）;
//启用轴，CTRL_REG1 = 0x07
LIS2DH12_SetAxesEnabled（LIS2DH12_X_ENABLE | LIS2DH12_Y_ENABLE | LIS2DH12_Z_ENABLE）;
//将ODR设置为1Hz，
CTRL_REG1 = 0x17
LIS2DH12_SetODR（LIS2DH12_ODR_1Hz）;
//将FIFO水印设置为24，FIFO_CTRL_REG = 0x18
LIS2DH12_SetWaterMark（
24
）;
//在INT1上设置Fifo水印中断，CTRL_REG3 = 0x04
LIS2DH12_Setint1Pin（
LIS2DH12_WTM_ON_INT1_ENABLE
）;
//中断1锁存使能，CTRL_REG5 = 0x08
LIS2DH12_Int1LatchEnable（LIS2DH12_ENABLE）;
//启用fifo模式，
CTRL_REG5 = 0x48
，FIFO_CTRL_REG = 0x58
LIS2DH12_FIFOModeEnable（LIS2DH12_FIFO_MODE）;
几秒钟后，我读取了FIFO_SRC_REG寄存器，FSS [4：0]字段正在计数，
最后是FIFO_SRC_REG = 0xDF的值。因此我认为FIFO工作正常，
但是我无法获得INT1的FIFO水印中断。
一个
关于如何正确配置中断的建议将不胜感激。
谢谢。

#incelegrometer-lis2dh12-configure＃lis2dh12 #no-interrupt



以下为原文




Hello,
I am using following resister setting to config the LIS2DH12 to generate FIFO watermark interrupt on INT1 pin, however the INT1 pin always stays LOW, I am not sure what I am missing.
INT1 is connect directly to the MCU GPIO pin which set to input.

Here are the register settings I'm currently using:

//Enable BDU, CTRL_REG4 = 0x80

LIS2DH12_SetBDU(LIS2DH12_ENABLE );

// Set to normal power mode, 10bit ACC data, CTRL_REG1 = 0x00, CTRL_REG4 = 0x80

LIS2DH12_SetMode(LIS2DH12_NORMAL );

// Full scale selection, CTRL_REG4 = 0x80

LIS2DH12_SetFullScale(LIS2DH12_FULLSCALE_2);

// Enable axes, CTRL_REG1 = 0x07

LIS2DH12_SetAxesEnabled(LIS2DH12_X_ENABLE | LIS2DH12_Y_ENABLE | LIS2DH12_Z_ENABLE);

// set ODR to 1Hz,
CTRL_REG1 = 0x17

LIS2DH12_SetODR(LIS2DH12_ODR_1Hz);

// set FIFO watermark to 24, FIFO_CTRL_REG = 0x18

LIS2DH12_SetWaterMark(
24
);

// set Fifo watermark interrupt on INT1, CTRL_REG3 = 0x04
LIS2DH12_SetInt1Pin(
LIS2DH12_WTM_ON_INT1_ENABLE
);

// Interrupt 1 Latch enable, CTRL_REG5 = 0x08

LIS2DH12_Int1LatchEnable(LIS2DH12_ENABLE);

// enable fifo mode,
CTRL_REG5 = 0x48
, FIFO_CTRL_REG = 0x58
LIS2DH12_FIFOModeEnable(LIS2DH12_FIFO_MODE);
After few seconds, I read the FIFO_SRC_REG register, the FSS[4:0] field is counting up,
and finally the value of FIFO_SRC_REG = 0xDF. Therefore I think FIFO is working,
however I cannot get the FIFO watermark interrupt for INT1.
A
ny suggestion on how to configure the interrupt correctly would be greatly appreciated.

Thank you.

#accelerometer-lis2dh12-configure #lis2dh12 #no-interrupt