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標題: STC8H單片機通過SPI驅動ADXL345三軸加速度計 [打印本頁]
作者: michaelchain    時間: 2022-1-22 16:53
標題: STC8H單片機通過SPI驅動ADXL345三軸加速度計
使用FwLib_STC8封裝庫

  1. // Copyright 2021 IOsetting

  3. /***
  4. * Demo: ADXL345
  5. * Board: STC8H8K64U
  6. *                                8H8K64U
  7. * GND       -> GND               G
  8. * VDD(Vcc)  -> VCC               V
  9. * CS        -> GPIO OUT P35      34
  10. * INT1      -> GPIO IN  P36 INT2 35
  11. * INT2      -> GPIO IN  P37 INT3 36
  12. * SDO       -> MISO     P33      30
  13. * SDI/SDA   -> MOSI     P34      31
  14. * SCL       -> SCLK     P32      29
  15. */

  17. #include "fw_hal.h"
  18. #include "adxl345.h"
  19. #include <stdio.h>

  21. volatile uint8_t count_int2 = 0, count_int3 = 0, count_double_tap = 0;
  22. volatile int16_t x, y, z;

  24. void SPI_Init(void)
  25. {
  26.     // ADXL345, SPI CLK max frequency is 5MHz
  27.     SPI_SetClockPrescaler(SPI_ClockPreScaler_16);
  28.     // Clock is high when idle
  29.     SPI_SetClockPolarity(HAL_State_ON);
  30.     // Data transfer is driven by lower SS pin
  31.     SPI_SetClockPhase(SPI_ClockPhase_TrailingEdge);
  32.     // MSB first
  33.     SPI_SetDataOrder(SPI_DataOrder_MSB);
  34.     // Define the output pins
  35.     SPI_SetPort(SPI_AlterPort_P35_P34_P33_P32);
  36.     // Ignore SS pin, use MSTR to swith between master/slave mode
  37.     SPI_IgnoreSlaveSelect(HAL_State_ON);
  38.     // Master mode
  39.     SPI_SetMasterMode(HAL_State_ON);
  40.     // Start SPI
  41.     SPI_SetEnabled(HAL_State_ON);
  42. }

  44. void GPIO_Init(void)
  45. {
  46.     // Configure GPIO pins before SPI and device
  47.     // MISO(P33), MOSI(P34)
  48.     GPIO_P3_SetMode(GPIO_Pin_3|GPIO_Pin_4, GPIO_Mode_InOut_QBD);
  49.     // SCLK(P32), CS(P35),
  50.     GPIO_P3_SetMode(GPIO_Pin_2|GPIO_Pin_5, GPIO_Mode_Output_PP);
  51.     // INT2(P36), INT3(P37)
  52.     GPIO_P3_SetMode(GPIO_Pin_6|GPIO_Pin_7, GPIO_Mode_Input_HIP);
  53. }

  55. void INT_Init()
  56. {
  57.     EXTI_Int2_SetIntState(HAL_State_ON);
  58.     EXTI_Int3_SetIntState(HAL_State_ON);
  59.     EXTI_Global_SetIntState(HAL_State_ON);
  60. }

  62. INTERRUPT(Int2_Routine, EXTI_VectInt2)
  63. {
  64.     count_int2++;
  65.     if (ADXL345_IsInterrupt(ADXL345_INT_DOUBLE_TAP) > 0)
  66.     {
  67.         count_double_tap++;
  68.     }
  69.    
  70. }

  72. INTERRUPT(Int3_Routine, EXTI_VectInt3)
  73. {
  74.     count_int3++;
  75.     x = ADXL345_ReadInt(ADXL345_REG_DATAX0);
  76.     y = ADXL345_ReadInt(ADXL345_REG_DATAY0);
  77.     z = ADXL345_ReadInt(ADXL345_REG_DATAZ0);
  78. }

  80. int main(void)
  81. {
  82.     SYS_SetClock();
  83.     GPIO_Init();
  84.     UART1_Config8bitUart(UART1_BaudSource_Timer1, HAL_State_ON, 115200);
  85.     SPI_Init();
  86.     INT_Init();
  87.     ADXL345_Init(
  88.         ADXL345_DATARATE_100_HZ,
  89.         ADXL345_SPI_WIRE_4,
  90.         ADXL345_INT_ACTIVE_LOW,
  91.         ADXL345_DATA_RESOLVE_FULL,
  92.         ADXL345_DATA_ALIGNMENT_RIGHT,
  93.         ADXL345_G_RANGE_8G
  94.     );
  95.     // Tap threshold: 62.5mg / LSB, value = 2.5g / 0.0625g = 0x28
  96.     ADXL345_WriteByte(ADXL345_REG_THRESH_TAP, 0x28);
  97.     // Tap duration: 625us / LSB, value = 0.02s / 0.000625s = 0x20
  98.     ADXL345_WriteByte(ADXL345_REG_DUR, 0x20);
  99.     // Tap latency: 1.25ms / LSB, value = 0.1s / 0.00125s = 0x50
  100.     ADXL345_WriteByte(ADXL345_REG_LATENT, 0x50);
  101.     // Tap window: 1.25ms / LSB, value = 0.3s / 0.00125s = 0xF0
  102.     ADXL345_WriteByte(ADXL345_REG_WINDOW, 0xF0);
  103.     ADXL345_EnableTapDetectOnAxes(
  104.         ADXL345_TAP_DETECT_AXIS_X|ADXL345_TAP_DETECT_AXIS_Y|ADXL345_TAP_DETECT_AXIS_Z);
  105.     ADXL345_SetInterrupts(
  106.         ADXL345_INT_DATA_READY|ADXL345_INT_SINGLE_TAP|ADXL345_INT_DOUBLE_TAP);
  107.     ADXL345_RemapInterrupts(ADXL345_INT_DATA_READY);

  109.     // read to clear interrupts, or the counter will never receive interrupts
  110.     x = ADXL345_ReadInt(ADXL345_REG_DATAX0);
  111.     y = ADXL345_ReadInt(ADXL345_REG_DATAY0);
  112.     z = ADXL345_ReadInt(ADXL345_REG_DATAZ0);
  113.     x = ADXL345_ReadByte(ADXL345_REG_INT_SOURCE);

  115.     while(1)
  116.     {
  117.         printf("X:%6d, Y:%6d, Z:%6d, DAT:%3d, TAP:%3d, 2-TAP:%3d\r\n",
  118.             x, y, z, count_int3, count_int2, count_double_tap);
  119.         SYS_Delay(50);
  120.     }
  121. }
復制代碼

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

作者: chenyucy72    時間: 2022-7-9 16:29
老師好，請教一下，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); }，，，，，，再加上上面的FW_hal庫，這個好像是STM32HAL的代碼吧？為什么在這里能上STC8，不明白



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