134 lines
4.1 KiB
C
134 lines
4.1 KiB
C
// Copyright 2021 IOsetting <iosetting(at)outlook.com>
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
/***
|
|
* Demo: ADXL345
|
|
* Board: STC8H8K64U
|
|
* 8H8K64U
|
|
* GND -> GND G
|
|
* VDD(Vcc) -> VCC V
|
|
* CS -> GPIO OUT P35 34
|
|
* INT1 -> GPIO IN P36 INT2 35
|
|
* INT2 -> GPIO IN P37 INT3 36
|
|
* SDO -> MISO P33 30
|
|
* SDI/SDA -> MOSI P34 31
|
|
* SCL -> SCLK P32 29
|
|
*/
|
|
|
|
#include "fw_hal.h"
|
|
#include "adxl345.h"
|
|
#include <stdio.h>
|
|
|
|
volatile uint8_t count_int2 = 0, count_int3 = 0, count_double_tap = 0;
|
|
volatile int16_t x, y, z;
|
|
|
|
void SPI_Init(void)
|
|
{
|
|
// ADXL345, SPI CLK max frequency is 5MHz
|
|
SPI_SetClockPrescaler(SPI_ClockPreScaler_16);
|
|
// Clock is high when idle
|
|
SPI_SetClockPolarity(HAL_State_ON);
|
|
// Data transfer is driven by lower SS pin
|
|
SPI_SetClockPhase(SPI_ClockPhase_TrailingEdge);
|
|
// MSB first
|
|
SPI_SetDataOrder(SPI_DataOrder_MSB);
|
|
// Define the output pins
|
|
SPI_SetPort(SPI_AlterPort_P35_P34_P33_P32);
|
|
// Ignore SS pin, use MSTR to swith between master/slave mode
|
|
SPI_IgnoreSlaveSelect(HAL_State_ON);
|
|
// Master mode
|
|
SPI_SetMasterMode(HAL_State_ON);
|
|
// Start SPI
|
|
SPI_SetEnabled(HAL_State_ON);
|
|
}
|
|
|
|
void GPIO_Init(void)
|
|
{
|
|
// Configure GPIO pins before SPI and device
|
|
// MISO(P33), MOSI(P34)
|
|
GPIO_P3_SetMode(GPIO_Pin_3|GPIO_Pin_4, GPIO_Mode_InOut_QBD);
|
|
// SCLK(P32), CS(P35),
|
|
GPIO_P3_SetMode(GPIO_Pin_2|GPIO_Pin_5, GPIO_Mode_Output_PP);
|
|
// INT2(P36), INT3(P37)
|
|
GPIO_P3_SetMode(GPIO_Pin_6|GPIO_Pin_7, GPIO_Mode_Input_HIP);
|
|
}
|
|
|
|
void INT_Init()
|
|
{
|
|
EXTI_Int2_SetIntState(HAL_State_ON);
|
|
EXTI_Int3_SetIntState(HAL_State_ON);
|
|
EXTI_Global_SetIntState(HAL_State_ON);
|
|
}
|
|
|
|
INTERRUPT(Int2_Routine, EXTI_VectInt2)
|
|
{
|
|
count_int2++;
|
|
if (ADXL345_IsInterrupt(ADXL345_INT_DOUBLE_TAP) > 0)
|
|
{
|
|
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)
|
|
{
|
|
SYS_SetClock();
|
|
GPIO_Init();
|
|
UART1_Config8bitUart(UART1_BaudSource_Timer1, HAL_State_ON, 115200);
|
|
SPI_Init();
|
|
INT_Init();
|
|
ADXL345_Init(
|
|
ADXL345_DATARATE_100_HZ,
|
|
ADXL345_SPI_WIRE_4,
|
|
ADXL345_INT_ACTIVE_LOW,
|
|
ADXL345_DATA_RESOLVE_FULL,
|
|
ADXL345_DATA_ALIGNMENT_RIGHT,
|
|
ADXL345_G_RANGE_8G
|
|
);
|
|
// 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)
|
|
{
|
|
printf("X:%6d, Y:%6d, Z:%6d, DAT:%3d, TAP:%3d, 2-TAP:%3d\r\n",
|
|
x, y, z, count_int3, count_int2, count_double_tap);
|
|
SYS_Delay(50);
|
|
}
|
|
}
|