J M
/
MCP9808
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Revision 2:4f8e1fb852d3, committed 2017-01-20
- Comitter:
- Jmfox24
- Date:
- Fri Jan 20 19:48:45 2017 +0000
- Parent:
- 1:7e98ef2bd303
- Commit message:
- add sensor detection function
Changed in this revision
| MCP9808.cpp | Show annotated file Show diff for this revision Revisions of this file |
| MCP9808.hpp | Show annotated file Show diff for this revision Revisions of this file |
--- a/MCP9808.cpp Mon Jan 09 17:57:58 2017 +0000
+++ b/MCP9808.cpp Fri Jan 20 19:48:45 2017 +0000
@@ -7,6 +7,29 @@
MCP9808:: ~MCP9808() {}
+bool MCP9808::is_detected()
+{
+ uint16_t v = 0;
+
+ /* check MFG ID */
+ if (reg_read(MCP9808_REG_MFG_ID, &v)) {
+ return false;
+ }
+ if (v != MCP9808_MFG_ID) {
+ return false;
+ }
+
+ /* check DEV ID */
+ if (reg_read(MCP9808_REG_DEV_ID, &v)) {
+ return false;
+ }
+ if (v != MCP9808_DEV_ID) {
+ return false;
+ }
+
+ return true;
+}
+
int MCP9808::sleep()
{
return set_cfg_flag(MCP9808_CFG_FLAG_SHDN_ENABLED, true);
--- a/MCP9808.hpp Mon Jan 09 17:57:58 2017 +0000
+++ b/MCP9808.hpp Fri Jan 20 19:48:45 2017 +0000
@@ -56,6 +56,14 @@
MCP9808_CFG_FLAG_SHDN_ENABLED = (1 << 8),
};
+ /** Manufacturer ID from MCP9808_REG_MFG_ID register
+ */
+ static const uint16_t MCP9808_MFG_ID = 0x0054;
+
+ /** Device ID from MCP9808_REG_DEV_ID register
+ */
+ static const uint16_t MCP9808_DEV_ID = 0x0400;
+
/** Create an MCP9808 using the specified pins for I2C and specified I2C
* address
*
@@ -67,6 +75,12 @@
virtual ~MCP9808();
+ /** Detects the sensor's presence
+ *
+ * @returns true if sensor is detected
+ */
+ bool is_detected();
+
/** Puts the sensor into (low-power) shutdown mode
*
* @returns 0 on success, negative on error