David Wahl
Fixed some I2C items to work on STM Nucleo F446RE
Diff: MCP9600.cpp
- Revision:
- 1:4fbdf7768530
- Parent:
- 0:f33e95899738
--- a/MCP9600.cpp Tue Oct 02 23:00:22 2018 +0000
+++ b/MCP9600.cpp Thu Aug 08 15:36:58 2019 +0000
@@ -18,28 +18,34 @@
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
+
+ * Modified by David Wahl to work with STM Nucleo boards (tested on Nucleo F446RE). Rewrote I2C related items.
*/
-
- #include "MCP9600.h"
- #include "mbed.h"
-
+
+#include "MCP9600.h"
+#include "mbed.h"
+
// Constructor with I2C instance and I2C Device Address of MCP9600
-MCP9600::MCP9600(I2C *i2c, char addr) : i2cMcp9600(i2c) {
- Mcp9600Addr = addr;
+MCP9600::MCP9600(I2C &i2c, int i2cAddress) : i2c(i2c), mi2cAddress(i2cAddress << 1)
+{
+ //Mcp9600Addr = addr;
}
// Destructor
-MCP9600::~MCP9600() {
+MCP9600::~MCP9600()
+{
}
// Set I2C Device Address of MCP9600
-void MCP9600::setAddress(char addr) {
- Mcp9600Addr = addr;
-}
+//void MCP9600::setAddress(char addr)
+//{
+// Mcp9600Addr = addr;
+//}
// Get I2C Device Address of this instance
-char MCP9600::getAddress(void) {
- return (Mcp9600Addr);
+char MCP9600::getAddress(void)
+{
+ return (mi2cAddress >> 1); // Return 7-bit address
}
// Read Temperature from Temperature Register
@@ -50,20 +56,19 @@
char data[2];
float float_val;
- i2cMcp9600->write( Mcp9600Addr, &tempRegister, 1, 1);
-
+ i2c.write( mi2cAddress, &tempRegister, 1, 1);
+
// Read temp (data[0] for MSB, data[1] for LSB)
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 1 );
- i2cMcp9600->read( Mcp9600Addr, &data[1], 1, 0 );
-
+ i2c.read( mi2cAddress, &data[0], 1, 1 );
+ i2c.read( mi2cAddress, &data[1], 1, 0 );
+
// Convert to real value
if ((data[0] & 0x80) == 0x80) { // TH < 0
data[0] = data[0] & 0x7F; // Clear Sign
float_val = 2032.0f - (data[0] * 16.0f);
float_val = float_val + (15.9375f - data[1] / 16.0f);
float_val = float_val * (-1.0f);
- }
- else { // TH >= 0
+ } else { // TH >= 0
float_val = (data[0] * 16.0 + data[1] / 16.0);
}
return(float_val);
@@ -77,13 +82,13 @@
long long_val;
adcRegister = 0x03;
- i2cMcp9600->write( Mcp9600Addr, &adcRegister, 1, 1);
-
+ i2c.write( mi2cAddress, &adcRegister, 1, 1);
+
// Read ADC Register (data[0] for MSB, data[2] for LSB)
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 1 );
- i2cMcp9600->read( Mcp9600Addr, &data[1], 1, 1 );
- i2cMcp9600->read( Mcp9600Addr, &data[2], 1, 0 );
-
+ i2c.read( mi2cAddress, &data[0], 1, 1 );
+ i2c.read( mi2cAddress, &data[1], 1, 1 );
+ i2c.read( mi2cAddress, &data[2], 1, 0 );
+
// Convert to long value
long_val = data[0];
long_val = long_val << 8;
@@ -98,16 +103,16 @@
char MCP9600::writeStatusRegister( char statRegister )
{
char data[2];
-
+
data[0] = 0x04;
data[1] = statRegister;
-
- i2cMcp9600->write( Mcp9600Addr, data, 2, 1);
-
+
+ i2c.write( mi2cAddress, data, 2, 1);
+
// Readbeck Status Register
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 0 );
+ i2c.read( mi2cAddress, &data[0], 1, 0 );
- return(data[0]);
+ return(data[0]);
}
@@ -116,41 +121,41 @@
char data;
data = 0x04;
- i2cMcp9600->write( Mcp9600Addr, &data, 1, 0);
-
+ i2c.write( mi2cAddress, &data, 1, 0);
+
// Read Status Register
- i2cMcp9600->read( Mcp9600Addr, &data, 1, 0 );
-
+ i2c.read( mi2cAddress, &data, 1, 0 );
+
return(data);
-
+
}
char MCP9600::writeSensorConfigRegister( char cnfgRegister )
{
char data[2];
-
+
data[0] = 0x05;
data[1] = cnfgRegister;
-
- i2cMcp9600->write( Mcp9600Addr, data, 2, 1);
+
+ i2c.write( mi2cAddress, data, 2, 1);
// Readback Sensor Configuration Register
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 0 );
+ i2c.read( mi2cAddress, &data[0], 1, 0 );
- return(data[0]);
+ return(data[0]);
}
char MCP9600::readSensorConfigRegister( void )
{
char data;
-
+
data = 0x05; // Device ID / Revision Register
- i2cMcp9600->write( Mcp9600Addr, &data, 1, 1);
-
- i2cMcp9600->read( Mcp9600Addr, &data, 1, 0 );
-
+ i2c.write( mi2cAddress, &data, 1, 1);
+
+ i2c.read( mi2cAddress, &data, 1, 0 );
+
return (data);
}
@@ -158,17 +163,17 @@
char MCP9600::writeDeviceConfigRegister( char cnfgRegister )
{
char data[2];
-
+
data[0] = 0x06;
data[1] = cnfgRegister;
-
- i2cMcp9600->write( Mcp9600Addr, data, 2, 1);
-
+
+ i2c.write( mi2cAddress, data, 2, 1);
+
// Readback Device Configuration Register
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 0 );
+ i2c.read( mi2cAddress, &data[0], 1, 0 );
- return(data[0]);
+ return(data[0]);
}
@@ -177,13 +182,13 @@
char data;
data = 0x06;
- i2cMcp9600->write( Mcp9600Addr, &data, 1, 1);
-
+ i2c.write( mi2cAddress, &data, 1, 1);
+
// Read Device Configuration Register
- i2cMcp9600->read( Mcp9600Addr, &data, 1, 0 );
-
+ i2c.read( mi2cAddress, &data, 1, 0 );
+
return(data);
-
+
}
@@ -202,13 +207,13 @@
char data[2];
if ((alertCH > 0) && (alertCH < 5)) {
- data[0] = 0x07 + alertCH; // Alert Configuration Register
+ data[0] = 0x07 + alertCH; // Alert Configuration Register
data[1] = alertConfig; // Alert Configuration data
- i2cMcp9600->write( Mcp9600Addr, data, 2, 1);
+ i2c.write( mi2cAddress, data, 2, 1);
// Read register
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 0 );
- }
+ i2c.read( mi2cAddress, &data[0], 1, 0 );
+ }
return (data[0]);
}
@@ -216,13 +221,13 @@
char MCP9600::readAlertConfigRegister(char alertCH)
{
char data;
-
+
if ((alertCH > 0) && (alertCH < 5)) {
data = 0x07 + alertCH; // Alert Configuration Register
- i2cMcp9600->write( Mcp9600Addr, &data, 1, 1);
+ i2c.write( mi2cAddress, &data, 1, 1);
- i2cMcp9600->read( Mcp9600Addr, &data, 1, 0 );
- }
+ i2c.read( mi2cAddress, &data, 1, 0 );
+ }
return (data);
}
@@ -242,13 +247,13 @@
char data[2];
if ((alertCH > 0) && (alertCH < 5)) {
- data[0] = 0x0B + alertCH; // Alert Histerisis Register
+ data[0] = 0x0B + alertCH; // Alert Histerisis Register
data[1] = alertHist; // Alert Histerisis data
- i2cMcp9600->write( Mcp9600Addr, data, 2, 1);
+ i2c.write( mi2cAddress, data, 2, 1);
// Read register
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 0 );
- }
+ i2c.read( mi2cAddress, &data[0], 1, 0 );
+ }
return (data[0]);
}
@@ -256,13 +261,13 @@
char MCP9600::readAlertHisterisisRegister(char alertCH)
{
char data;
-
+
if ((alertCH > 0) && (alertCH < 5)) {
data = 0x0B + alertCH; // Alert Histerisis Register
- i2cMcp9600->write( Mcp9600Addr, &data, 1, 1);
+ i2c.write( mi2cAddress, &data, 1, 1);
- i2cMcp9600->read( Mcp9600Addr, &data, 1, 0 );
- }
+ i2c.read( mi2cAddress, &data, 1, 0 );
+ }
return (data);
}
@@ -276,19 +281,18 @@
// atertLimitLSB
// bit 7-2: Limit Value ( Div. 16)
// bit 1-0: Not Used
-
+
char data[3];
float float_val;
char alertLimitMSB;
char alertLimitLSB;
-
+
// Convert to 2 bytes
if (alertLimit_val >= 0.0f) {
alertLimitMSB = alertLimit_val / 16.0f;
alertLimit_val = alertLimit_val - alertLimitMSB * 16.0f;
alertLimitLSB = alertLimit_val * 16.0f;
- }
- else {
+ } else {
alertLimit_val = alertLimit_val * (-1.0f);
data[0] = alertLimit_val / 16.0f;
alertLimitMSB = 1+ (2032.0f - alertLimit_val) / 16.0f;
@@ -297,15 +301,15 @@
alertLimitLSB = alertLimit_val * 16.0f;
alertLimitMSB = alertLimitMSB | 0x80; // Set Sign Flag
}
-
- data[0] = 0x0F + alertCH; // Alert Limit Value Register
+
+ data[0] = 0x0F + alertCH; // Alert Limit Value Register
data[1] = alertLimitMSB; // Alert Limit Value (MSB)
data[2] = alertLimitLSB; // Alert Limit Value (LSB)
- i2cMcp9600->write( Mcp9600Addr, data, 3, 1 );
+ i2c.write( mi2cAddress, data, 3, 1 );
// Read Register
- i2cMcp9600->read( Mcp9600Addr, &data[1], 1, 1 );
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 0 );
+ i2c.read( mi2cAddress, &data[1], 1, 1 );
+ i2c.read( mi2cAddress, &data[0], 1, 0 );
// Convert to real value
if ((data[1] & 0x80) == 0x80) { // Limit Value < 0
@@ -313,8 +317,7 @@
float_val = 2032.0f - (data[1] * 16.0f);
float_val = float_val + (15.75f - data[0] / 16.0f);
float_val = (-1.0f) * float_val;
- }
- else { // Limit Value >= 0
+ } else { // Limit Value >= 0
float_val = (data[1] * 16.0 + data[0] / 16.0);
}
return(float_val);
@@ -326,20 +329,19 @@
char data[2];
float float_val;
- data[0] = 0x0F + alertCH; // Alert Limit Value Register
- i2cMcp9600->write( Mcp9600Addr, &data[0], 1, 1);
-
+ data[0] = 0x0F + alertCH; // Alert Limit Value Register
+ i2c.write( mi2cAddress, &data[0], 1, 1);
+
// Read register
- i2cMcp9600->read( Mcp9600Addr, &data[1], 1, 1 );
- i2cMcp9600->read( Mcp9600Addr, &data[0], 1, 0 );
-
+ i2c.read( mi2cAddress, &data[1], 1, 1 );
+ i2c.read( mi2cAddress, &data[0], 1, 0 );
+
// Convert to real value
if ((data[1] & 0x80) == 0x80) { // Limit Value < 0
data[1] = data[1] & 0x7F; // Clear Sign
float_val = 2032.0 - (data[1] * 16.0);
float_val = float_val - (15.75 - data[0] / 16.0);
- }
- else { // Limit Value >= 0
+ } else { // Limit Value >= 0
float_val = (data[1] * 16.0 + data[0] / 16.0);
}
return(float_val);
@@ -349,11 +351,11 @@
char MCP9600::readIDRevisionRegister(void)
{
char data;
-
+
data = 0x20; // Device ID / Revision Register
- i2cMcp9600->write( Mcp9600Addr, &data, 1, 1);
-
- i2cMcp9600->read( Mcp9600Addr, &data, 1, 0 );
-
+ i2c.write( mi2cAddress, &data, 1, 1);
+
+ i2c.read( mi2cAddress, &data, 1, 0 );
+
return (data);
}