Diff: IS31SE5000.cpp

Revision:

0:b92d4b745118

Child:

2:215d002d2bbf

diff -r 000000000000 -r b92d4b745118 IS31SE5000.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/IS31SE5000.cpp	Thu Dec 24 00:40:19 2015 +0000
@@ -0,0 +1,181 @@
+/** 
+ * IS31SE5000 : IR sensor for touchless motion and proximity
+ *
+ */
+#include "mbed.h"
+#include "IS31SE5000.h"
+
+#define REG_STATUS      0x00
+#define REG_SHUTDOWN    0x01
+#define REG_CONFIG      0x11
+
+#define SSD_SHUTDOWN    0x00
+#define SSD_NORMAL      0x01
+
+#define EC_400MA        0x00
+#define EC_280MA        0x01
+#define EC_210MA        0x02
+#define EC_70MA         0x04
+
+#define PD_BE_OFF       0x01
+#define PD_BE_CLOSE     0x02
+
+#define MD_PD2_PD1      0x01
+#define MD_PD1_PD2      0x02
+
+#define MODE_MOTION     0x00
+#define MODE_PROXIMITY  0x01
+
+/** 
+ * Register Definitions
+ *
+ * Status Register 0x00 (Read Only)
+ * Bit [7:4] reserved
+ * Bit [3:2] PD
+ * Bit [1:0] MD
+ * The Status Register stores the motion 
+ * information which detected by IS31SE5000
+ * 
+ * PD : Proximity Detection
+ * 01 : Be off
+ * 10 : Be close
+ * Others : No motion
+ *
+ * MD : Motion Detection
+ * 01 : From PD2 to PD1
+ * 10 : From PD1 to PD2
+ * Others : No motion
+ *
+ * Shutdown Register 0x01 
+ * Bit [7:1] reserved
+ * Bit [0]   SSD (default = 0)
+ * The Shutdown Register sets software shutdown
+ * mode of IS31SE5000.
+ *
+ * SSD : Software Shutdown Enable
+ * 0   : Software shutdown mode (default)
+ * 1   : Normal operation
+ *
+ * Configuration Register
+ * Bit [7:4] Reserved
+ * Bit [3:1] EC   (default = 000)
+ * Bit [0]   MODE (default = 0)
+ * The Configuration Register sets the operating function.
+ * 
+ * EC : Emitting Current Setting
+ * (Adjusting detection distance, 
+ *  refer to detail information in Data Sheet Page 10)
+ * 000 : 400mA (default)
+ * 001 : 280mA
+ * 01x : 210mA
+ * 1xx :  70mA
+ *
+ * MODE : Mode Selection
+ * 0    : Motion mode (default)
+ * 1    : Proximity mode
+ */
+ 
+IS31SE5000::IS31SE5000(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr<<1) {
+    // activate the peripheral
+    shutdown_reg = 0x00 ;
+    config_reg = 0x00 ;
+}
+
+IS31SE5000::~IS31SE5000() { }
+
+ /* for Status Register */
+uint8_t IS31SE5000::getStatus(void)  /* returns status register */
+{
+    uint8_t status_reg = 0x00 ;
+    readRegs(REG_STATUS, &status_reg, 1) ;
+    return( status_reg ) ;
+}
+
+uint8_t IS31SE5000::getPD(void)  /* get Proximity Detection Value */
+{
+    uint8_t data ;
+    data = getStatus() ;
+    data = (data >> 2) & 0x03 ;
+    return(data) ;
+}
+
+uint8_t IS31SE5000::getMD(void)  /* get Motion Detection Value */
+{
+    uint8_t data ;
+    data = getStatus() ;
+    data &= 0x03 ;
+    return(data) ;
+}
+
+/* for Shutdown Register */
+void IS31SE5000::activate(void) 
+{
+    uint8_t data[2] = { REG_SHUTDOWN, SSD_NORMAL } ;
+    writeRegs(data, 2) ;
+}
+
+void IS31SE5000::shutdown(void)
+{
+    uint8_t data[2] = { REG_SHUTDOWN, SSD_SHUTDOWN } ;
+    writeRegs(data, 2) ;
+}
+ 
+ /* for Configuration Register */
+void IS31SE5000::setEC(uint8_t ec_value) 
+{
+    uint8_t data[2] ;
+    data[0] = REG_CONFIG ;
+    config_reg = ((ec_value << 1)&0x07) | (config_reg & 0x01) ;
+    data[1] = config_reg ;
+    writeRegs(data, 2) ;
+    
+}
+
+void IS31SE5000::motionMode(void)
+{
+    uint8_t data[2] ;
+    data[0] = REG_CONFIG ;
+    config_reg &= ~(MODE_PROXIMITY) ;
+    data[1] = config_reg ; 
+    writeRegs(data, 2) ;
+}
+
+void IS31SE5000::proximityMode(void) 
+{
+    uint8_t data[2] ;
+    data[0] = REG_CONFIG ;
+    config_reg |= MODE_PROXIMITY ;
+    data[1] = config_reg ; 
+    writeRegs(data, 2) ;
+}
+
+uint8_t IS31SE5000::getEC(void) 
+{
+    return( (config_reg >> 1) & 0x07) ;
+}
+
+uint8_t IS31SE5000::getMode(void) 
+{
+    return( config_reg & 0x01 ) ;
+}
+ 
+ /* */
+uint8_t IS31SE5000::get_shutdown_reg(void)
+{
+    return(shutdown_reg) ;
+}
+
+uint8_t IS31SE5000::get_config_reg(void) 
+{
+    return( config_reg ) ;
+}
+
+void IS31SE5000::readRegs(int addr, uint8_t * data, int len) {
+    char t[1] = {addr};
+    m_i2c.write(m_addr, t, 1, true);
+    m_i2c.read(m_addr, (char *)data, len);
+}
+
+void IS31SE5000::writeRegs(uint8_t * data, int len) {
+    m_i2c.write(m_addr, (char *)data, len);
+}
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