Diff: MAX30205.cpp

Revision:

0:6cf99fa71e1b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX30205.cpp	Tue Apr 25 05:04:06 2017 +0000
@@ -0,0 +1,96 @@
+#include "mbed.h"
+#include "MAX30205.h"
+
+/**
+ * Internal Registers
+ * The device contains four registers,
+ * each of which consists of 2bytes.
+ * The configuration register contains only 1 byte of
+ * actual data and, when read as a 2-byte register,
+ * repeats the same data for the second byte.
+ */
+ 
+#define REG_TEMP  0x00
+#define REG_CONF  0x01
+#define REG_THYST 0x02
+#define REG_TOS   0x03
+
+MAX30205::MAX30205(PinName sda, PinName scl, int addr): m_i2c(sda, scl), m_addr(addr<<1) 
+{
+    // activate the peripheral
+}
+
+MAX30205::~MAX30205()
+{
+}
+
+uint16_t MAX30205::getTemp(void) 
+{
+    uint16_t temp ;
+    uint8_t data[2] ;
+    readRegs(REG_TEMP, data, 2) ;
+    temp = (data[0] << 8) | data[1] ;
+    return(temp) ;
+}
+
+uint8_t MAX30205::getConf(void)
+{
+    uint8_t data[2] ;
+    readRegs(REG_CONF, data, 2) ;
+    return(data[0]) ;
+}
+
+void MAX30205::setConf(uint8_t conf)
+{
+    uint8_t data[3] ;
+    data[0] = REG_CONF ;
+    data[1] = conf ;
+    data[2] = conf ;
+    writeRegs(data, 3) ;
+}
+
+uint16_t MAX30205::getThyst(void)
+{
+    uint16_t thyst ;
+    uint8_t data[2] ;
+    readRegs(REG_THYST, data, 2) ;
+    thyst = (data[0] << 8) | data[1] ;
+    return(thyst) ;
+}
+
+void MAX30205::setThyst(uint16_t thyst)
+{
+    uint8_t data[3] ;
+    data[0] = REG_THYST ;
+    data[1] = (thyst >> 8) & 0xFF ;
+    data[2] = thyst & 0xFF ;
+    writeRegs(data, 3) ;
+}
+
+uint16_t MAX30205::getTos(void)
+{
+    uint16_t tos ;
+    uint8_t data[2] ;
+    readRegs(REG_TOS, data, 2) ;
+    tos = (data[0] << 8) | data[1] ;
+    return(tos) ;
+}
+
+void MAX30205::setTos(uint16_t tos)
+{
+    uint8_t data[3] ;
+    data[0] = REG_TOS ;
+    data[1] = (tos >> 8) & 0xFF ;
+    data[2] = tos & 0xFF ;
+    writeRegs(data, 3) ;
+}
+
+void MAX30205::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 MAX30205::writeRegs(uint8_t * data, int len) {
+    m_i2c.write(m_addr, (char *)data, len);
+}
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