Revision 0:aa97de8e628a, committed 2017-04-23

Comitter:

sog_yang

Date:

Sun Apr 23 01:04:47 2017 +0000

Child:

1:510ee396d140

Commit message:

AS7000 ARM mBedOS C++ Driver

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AS7000.cpp	Sun Apr 23 01:04:47 2017 +0000
@@ -0,0 +1,61 @@
+#include "AS7000.h"
+#include "mbed.h"
+
+DigitalOut AS7000_GPIO8(p5); //NNN50-P5 map to GPIO-8 for AS7000 on/off
+DigitalInOut AS7000_INT(p4); //NNN50-P4 GPIO-5 for AS7000 INT
+
+
+AS7000::AS7000(PinName SDA, PinName SCL) : _i2c(SDA,SCL){
+    //Set I2C fast and bring reset line high
+    _i2c.frequency(100000);
+    address = AS7000Address;
+    
+    AS7000_INT.mode(PullNone);
+    
+    AS7000_INT.output();
+     
+    AS7000_GPIO8.write(1); // Power OFF AS7000
+    AS7000_INT.write(1); // AS7000 GPIO OUTPUT LOW
+    AS7000_INT.input();
+    wait_ms(100);
+}
+    
+void AS7000::enable(void){
+        char cmd[2];
+        
+        AS7000_GPIO8.write(0); //Power ON AS7000
+        wait_ms(280);    //Wait for > 250ms for booting
+        
+            
+        cmd[0] = AS7000_STARTUP; //0x04;       
+        cmd[1] = 0x02;
+        _i2c.write(address, cmd, 2);
+         wait_ms(35);  
+    
+}
+
+void AS7000::update(void){
+    hrm.transaction_id = rawdata[0];
+    hrm.status         = rawdata[1];
+    hrm.hreat_rate     = rawdata[2];
+    hrm.signal_QA      = rawdata[3];
+    hrm.LED_current    = ((rawdata[4]<<8)+rawdata[5]);
+    hrm.SYNC           = rawdata[6];    
+}
+
+void AS7000::hr_only(void){
+    char cmd[2];
+     cmd[0] = HR_ONLY;
+     if(AS7000_INT == 0) {
+        _i2c.write(address, cmd, 1);
+        _i2c.read(address, rawdata, 7, false);
+        wait_ms(10);
+        update();
+    }      
+   printf("*HR=%03d#", hrm.hreat_rate); 
+    //printf("\n");
+    //printf("transaction_id:=%03d# status:=%03d# hreat_rate:=%03d#", hrm.transaction_id,hrm.status,hrm.hreat_rate); 
+    //printf("signal_QA:=%03d# LED_current:=%6.2f# SYNC:=%03d#", hrm.signal_QA,hrm.LED_current,hrm.SYNC); 
+}
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AS7000.h	Sun Apr 23 01:04:47 2017 +0000
@@ -0,0 +1,63 @@
+#ifndef AS7000_H
+#define AS7000_H
+
+#include "mbed.h"
+//
+#define AS7000Address 0x60
+//Register definitions
+#define AS7000_STARTUP  0x04 //4
+#define HR_ONLY         0x08 //8
+#define HR_ONLY_LEN     0x07 //7
+#define HR_REG          0x12 //18
+#define HR_LEN          21
+
+typedef struct{
+  uint8_t  transaction_id;
+  uint8_t  status;
+  uint8_t  hreat_rate;
+  uint8_t  signal_QA;
+  uint16_t LED_current;
+  uint8_t  SYNC;
+  uint8_t  startup_flag;
+  bool     contact_detected;
+}as7000_t;
+
+
+
+
+/** Class for operating Bosch BNO055 sensor over I2C **/
+class AS7000 
+{ 
+public: 
+
+/** Create BNO055 instance **/
+    AS7000(PinName SDA, PinName SCL); 
+    
+    void gpio_init(void);
+    void enable   (void);
+    void startup  (void);
+    void hr_only  (void);
+    void update (void);  
+    as7000_t hrm;  
+
+    
+    private:    
+        I2C _i2c;
+        char rx,tx[2],address;  //I2C variables
+        char rawdata[22]; //Temporary array for input data values
+        char hreat_rate;
+        char startup_flag;
+        
+void readchar(char location){
+    tx[0] = location;
+    _i2c.write(address,tx,1,true);
+    _i2c.read(address,&rx,1,false);
+}
+
+void writechar(char location, char value){
+    tx[0] = location;
+    tx[1] = value;
+    _i2c.write(address,tx,2);
+}
+    };
+#endif
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