使用FwLib_STC8封裝庫
- // Copyright 2021 IOsetting
- /***
- * 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);
- }
- }
關于代碼的說明
https://www.cnblogs.com/milton/p/15821704.html
完整代碼查看
Github: https://github.com/IOsetting/FwLib_STC8/tree/master/demo/spi/adxl345
Gitee:
https://gitee.com/iosetting/fw-lib_-stc8/tree/master/demo/spi/adxl345
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