stickbreaker
commented
5 years ago This example code is for a bit bang'd i2c interface. The esp32 has builtin hardware to handle I2c. It would be better to use it.
Do you have a link for the datasheet that contains the I2C commands for your sensors. I was unable to find one with a google search. All I found was the hardware spec, no listing of i2c commands or data fields.
If you can show me the command list I can help you communicate with the sensor.
Chuck.
Bryanbaring
beegee-tokyo
stale[bot]
j-u-h
gnieddu90
Hardware:
Board: wemos lolin esp32 Core Installation version: ?1.0.0 IDE name: ?Arduino IDE 1.8.5 Flash Frequency: ?40Mhz
Upload Speed: ?115200? Computer OS: ?Windows 10
Description:
ibeen stugling for 3mmnths and submission of output is near .my wemos lolin is working find in any file example in arduino ide.. im really sure that i installed properly the esp 32 to arduino ide.. my problem is when im uploading the sketch of my xgzp 6867 pressure sensor . "im getting error compiling sketch for wemos lolin32".. or just dont write it the right . please corrrect my sketch on how to compile it in my wemos lolin 32.. thank you in advance.
//Change the code below by your sketch
include "LCD1602.h"
include "Stdio.h"
include "XGZPC.h"
int main(void) { char DisplayBuff[20]; float XGZPC_Data = 100;
}
XGZP6867_Pressure_Sensor_Module[1].pdf
this are the source code for the main ;
include "XGZPC.h"
include
define _Nop() nop() //¶¨Òå¿ÕÖ¸Áî
sbit I2C_SDA = P1^4; sbit I2C_SCL = P1^3;
xdata char I2C_DataBuff[6];
//static void I2C_DelayUs2x(unsigned char t) //{
// while(--t); //}
//static void I2C_DelayMs(unsigned char t) //{ //
// while(t--) // { // //´óÖÂÑÓʱ1mS // I2C_DelayUs2x(245); // I2C_DelayUs2x(245); // } //}
/------------------------------------------------ Æô¶¯×ÜÏß ------------------------------------------------/ static void Start_I2c() { I2C_SDA=1; //·¢ËÍÆðʼÌõ¼þµÄÊý¾ÝÐźŠ_Nop(); I2C_SCL=1; _Nop(); //ÆðʼÌõ¼þ½¨Á¢Ê±¼ä´óÓÚ4.7us,ÑÓʱ _Nop(); _Nop(); _Nop(); _Nop();
I2C_SDA=0; //·¢ËÍÆðʼÐźŠ_Nop(); //ÆðʼÌõ¼þËø¶¨Ê±¼ä´óÓÚ4¦Ì _Nop(); _Nop(); _Nop(); _Nop();
I2C_SCL=0; //ǯסI2C×ÜÏߣ¬×¼±¸·¢ËÍ»ò½ÓÊÕÊý¾Ý _Nop(); _Nop(); } /------------------------------------------------ ½áÊø×ÜÏß ------------------------------------------------/ static void Stop_I2c() { I2C_SDA=0; //·¢ËͽáÊøÌõ¼þµÄÊý¾ÝÐźŠ_Nop(); //·¢ËͽáÊøÌõ¼þµÄʱÖÓÐźŠI2C_SCL=1; //½áÊøÌõ¼þ½¨Á¢Ê±¼ä´óÓÚ4¦Ì _Nop(); _Nop(); _Nop(); _Nop(); _Nop(); I2C_SDA=1; //·¢ËÍI2C×ÜÏß½áÊøÐźŠ_Nop(); _Nop(); _Nop(); _Nop(); }
/---------------------------------------------------------------- ·¢ËÍÊý¾Ý ------------------------------------------------------------------/ static unsigned char I2C_SendByte(unsigned char Byte) { unsigned char i,I2C_ACK;
for(i=0;i<8;i++) //Òª´«Ë͵ÄÊý¾Ý³¤¶ÈΪ8λ { if((Byte<<i)&0x80)I2C_SDA=1; //ÅжϷ¢ËÍλ else I2C_SDA=0;
_Nop(); I2C_SCL=1; //ÖÃʱÖÓÏßΪ¸ß£¬Í¨Öª±»¿ØÆ÷¿ªÊ¼½ÓÊÕÊý¾Ýλ _Nop(); _Nop(); //±£Ö¤Ê±ÖӸߵçƽÖÜÆÚ´óÓÚ4¦Ì _Nop(); _Nop(); _Nop();
I2C_SCL=0; }
}
/---------------------------------------------------------------- ¶ÁÈ¡Êý¾Ý ------------------------------------------------------------------/
static unsigned char I2C_RcvByte() { unsigned char retc; unsigned char i;
retc=0; I2C_SDA=1; //ÖÃÊý¾ÝÏßΪÊäÈ뷽ʽ for(i=0;i<8;i++) { _Nop();
I2C_SCL=0; //ÖÃʱÖÓÏßΪµÍ£¬×¼±¸½ÓÊÕÊý¾Ýλ _Nop(); _Nop(); //ʱÖӵ͵çƽÖÜÆÚ´óÓÚ4.7us _Nop(); _Nop(); _Nop(); I2C_SCL=1; //ÖÃʱÖÓÏßΪ¸ßʹÊý¾ÝÏßÉÏÊý¾ÝÓÐЧ _Nop(); _Nop(); retc=retc<<1; if(I2C_SDA==1)retc=retc+1; //¶ÁÊý¾Ýλ,½ÓÊÕµÄÊý¾Ýλ·ÅÈëretcÖÐ _Nop(); _Nop(); } I2C_SCL=0;
_Nop(); _Nop(); return(retc); }
/---------------------------------------------------------------- Ó¦´ð×Óº¯Êý ----------------------------------------------------------------/ static void Ack_I2c(void) {
I2C_SDA=0;
_Nop(); _Nop(); _Nop();
I2C_SCL=1; _Nop(); _Nop(); //ʱÖӵ͵çƽÖÜÆÚ´óÓÚ4¦Ì _Nop(); _Nop(); _Nop();
I2C_SCL=0; //ÇåʱÖÓÏߣ¬Ç¯×¡I2C×ÜÏßÒÔ±ã¼ÌÐø½ÓÊÕ _Nop(); _Nop();
} /---------------------------------------------------------------- ·ÇÓ¦´ð×Óº¯Êý ----------------------------------------------------------------/ static void NoAck_I2c(void) {
I2C_SDA=1; _Nop(); _Nop(); _Nop();
I2C_SCL=1; _Nop(); _Nop(); //ʱÖӵ͵çƽÖÜÆÚ´óÓÚ4¦Ì _Nop(); _Nop(); _Nop();
I2C_SCL=0; //ÇåʱÖÓÏߣ¬Ç¯×¡I2C×ÜÏßÒÔ±ã¼ÌÐø½ÓÊÕ _Nop(); _Nop();
}
/---------------------------------------------------------------- ÏòÓÐ×ÓµØÖ·Æ÷¼þ·¢ËͶà×Ö½ÚÊý¾Ýº¯Êý
----------------------------------------------------------------/ bit I2C_SendByteLen(unsigned char DeviceAddress,unsigned char RegAddress,unsigned char *s,unsigned char DataLen) { unsigned char i;
Start_I2c(); //Æô¶¯×ÜÏß if(I2C_SendByte(DeviceAddress) == 0) //·¢ËÍÆ÷¼þµØÖ· return(0); if(I2C_SendByte(RegAddress) == 0) //·¢ËÍÆ÷¼þ×ÓµØÖ· return(0);
for(i=0;i<DataLen;i++) {
if(I2C_SendByte(*s) == 0) //·¢ËÍÊý¾Ý return(0); s++; } Stop_I2c(); //½áÊø×ÜÏß return(1); }
/---------------------------------------------------------------- ÏòÓÐ×ÓµØÖ·Æ÷¼þ¶ÁÈ¡¶à×Ö½ÚÊý¾Ýº¯Êý
----------------------------------------------------------------/ bit I2C_RecvByteLen(unsigned char DeviceAddress,unsigned char RegAddress,unsigned char *s,unsigned char DataLen) { unsigned char i;
Start_I2c(); //Æô¶¯×ÜÏß if(I2C_SendByte(DeviceAddress) == 0) //·¢ËÍÆ÷¼þµØÖ· return(0); if(I2C_SendByte(RegAddress) == 0) //·¢ËÍÆ÷¼þ×ÓµØÖ· return(0);
Start_I2c(); if(I2C_SendByte(DeviceAddress+1) == 0) return(0);
for(i=0;i<DataLen-1;i++) {
s=I2C_RcvByte(); //·¢ËÍÊý¾Ý Ack_I2c(); //·¢Ë;ʹðλ s++; } s=I2C_RcvByte(); NoAck_I2c(); //·¢ËÍ·ÇӦλ Stop_I2c(); //½áÊø×ÜÏß return(1); }
unsigned char XGZPC_Init(void) { I2C_SDA = 1; I2C_SCL = 1; if(I2C_RecvByteLen(0xda,0xa5,I2C_DataBuff,1) == 0) return 0; I2C_DataBuff[0] &= 0xfd; if(I2C_SendByteLen(0xda,0xa5,I2C_DataBuff,1) == 0) return 0; I2C_DataBuff[0] = 0x0a; if(!I2C_SendByteLen(0xda,0x30,I2C_DataBuff,1)) return 0; return 1; }
unsigned char Get_XGZPC_Value(float Value) { float XGZPC_Value = 0; if(I2C_RecvByteLen(0xda,0x06,I2C_DataBuff,3)) { XGZPC_Value = I2C_DataBuff[0] 65536 + I2C_DataBuff[1] 256 + I2C_DataBuff[2]; XGZPC_Value = (XGZPC_Value / 8388608) 100;
// if(XGZPC_Value > 8388608) // XGZPC_Value = (XGZPC_Value - 16777216) / 8388608 8.192; // else // XGZPC_Value = XGZPC_Value / 8388608 8.192; *Value = XGZPC_Value; I2C_DataBuff[0] = 0x0a; if(!I2C_SendByteLen(0xda,0x30,I2C_DataBuff,1)) return 0; return 1; } return 0; }