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opt: adxl345 demo

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This commit is contained in:
IOsetting 2022-01-19 02:15:03 +08:00
parent 1ce5e9386a
commit 98a9c04c5c
3 changed files with 35 additions and 19 deletions
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13
demo/spi/adxl345/adxl345.c
View File

@ -15,7 +15,7 @@
#include "adxl345.h"
uint8_t xbuf[2];
uint8_t xbuf[3];
uint8_t ADXL345_ReadByte(uint8_t addr)
{
@ -27,6 +27,17 @@ uint8_t ADXL345_ReadByte(uint8_t addr)
return xbuf[1];
}
uint16_t ADXL345_ReadInt(uint8_t addr)
{
ADXL345_CS = 0;
xbuf[0] = addr | 0xC0;
xbuf[1] = 0xFF;
xbuf[2] = 0xFF;
SPI_TxRxBytes(xbuf, 3);
ADXL345_CS = 1;
return *((uint16_t *)&xbuf[1]);
}
void ADXL345_WriteByte(uint8_t addr, uint8_t dat)
{
ADXL345_CS = 0;

1
demo/spi/adxl345/adxl345.h
View File

@ -150,6 +150,7 @@ typedef enum {
} ADXL345_G_Range_t;
uint8_t ADXL345_ReadByte(uint8_t addr);
uint16_t ADXL345_ReadInt(uint8_t addr);
void ADXL345_WriteByte(uint8_t addr, uint8_t dat);

40
demo/spi/adxl345/main.c
View File

@ -30,7 +30,8 @@
#include "adxl345.h"
#include <stdio.h>
uint8_t buf[6], count_int2 = 0, count_int3 = 0, count_double_tap = 0;
volatile uint8_t count_int2 = 0, count_int3 = 0, count_double_tap = 0;
volatile int16_t x, y, z;
void SPI_Init(void)
{
@ -77,17 +78,19 @@ INTERRUPT(Int2_Routine, EXTI_VectInt2)
{
count_double_tap++;
}
}
INTERRUPT(Int3_Routine, EXTI_VectInt3)
{
count_int3++;
x = ADXL345_ReadInt(ADXL345_REG_DATAX0);
y = ADXL345_ReadInt(ADXL345_REG_DATAY0);
z = ADXL345_ReadInt(ADXL345_REG_DATAZ0);
}
int main(void)
{
uint8_t intsrc;
int16_t x, y, z;
SYS_SetClock();
GPIO_Init();
UART1_Config8bitUart(UART1_BaudSource_Timer1, HAL_State_ON, 115200);
@ -101,29 +104,30 @@ int main(void)
ADXL345_DATA_ALIGNMENT_RIGHT,
ADXL345_G_RANGE_8G
);
ADXL345_WriteByte(ADXL345_REG_THRESH_TAP, 0x2F);
ADXL345_WriteByte(ADXL345_REG_DUR, 0x1F);
ADXL345_WriteByte(ADXL345_REG_LATENT, 0x1F);
ADXL345_WriteByte(ADXL345_REG_WINDOW, 0x7F);
// Tap threshold: 62.5mg / LSB, value = 2.5g / 0.0625g = 0x28
ADXL345_WriteByte(ADXL345_REG_THRESH_TAP, 0x28);
// Tap duration: 625us / LSB, value = 0.02s / 0.000625s = 0x20
ADXL345_WriteByte(ADXL345_REG_DUR, 0x20);
// Tap latency: 1.25ms / LSB, value = 0.1s / 0.00125s = 0x50
ADXL345_WriteByte(ADXL345_REG_LATENT, 0x50);
// Tap window: 1.25ms / LSB, value = 0.3s / 0.00125s = 0xF0
ADXL345_WriteByte(ADXL345_REG_WINDOW, 0xF0);
ADXL345_EnableTapDetectOnAxes(
ADXL345_TAP_DETECT_AXIS_X|ADXL345_TAP_DETECT_AXIS_Y|ADXL345_TAP_DETECT_AXIS_Z);
ADXL345_SetInterrupts(
ADXL345_INT_DATA_READY|ADXL345_INT_SINGLE_TAP|ADXL345_INT_DOUBLE_TAP);
ADXL345_RemapInterrupts(ADXL345_INT_DATA_READY);
// read to clear interrupts, or the counter will never receive interrupts
x = ADXL345_ReadInt(ADXL345_REG_DATAX0);
y = ADXL345_ReadInt(ADXL345_REG_DATAY0);
z = ADXL345_ReadInt(ADXL345_REG_DATAZ0);
x = ADXL345_ReadByte(ADXL345_REG_INT_SOURCE);
while(1)
{
buf[0] = ADXL345_ReadByte(ADXL345_REG_DATAX0);
buf[1] = ADXL345_ReadByte(ADXL345_REG_DATAX1);
buf[2] = ADXL345_ReadByte(ADXL345_REG_DATAY0);
buf[3] = ADXL345_ReadByte(ADXL345_REG_DATAY1);
buf[4] = ADXL345_ReadByte(ADXL345_REG_DATAZ0);
buf[5] = ADXL345_ReadByte(ADXL345_REG_DATAZ1);
x = *((int16_t *)&buf[0]);
y = *((int16_t *)&buf[2]);
z = *((int16_t *)&buf[4]);
printf("X:%6d, Y:%6d, Z:%6d, DAT:%3d, TAP:%3d, 2-TAP:%3d\r\n",
x, y, z, count_int2, count_int3, count_double_tap);
SYS_Delay(100);
x, y, z, count_int3, count_int2, count_double_tap);
SYS_Delay(50);
}
}