Revision 0:8203e12416bb, committed 2018-08-23

Comitter:

duchonic

Date:

Thu Aug 23 06:17:50 2018 +0000

Commit message:

First

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mtch112.cpp	Thu Aug 23 06:17:50 2018 +0000
@@ -0,0 +1,69 @@
+#include "mtch112.h"
+#include "main.h"
+
+MTCH112::MTCH112(PinName sda, PinName scl, uint8_t addr) : m_i2c(sda, scl), m_addr(addr) {}
+
+uint8_t MTCH112::MTCH112_Init(void)
+{
+    printf("MTCH112_Init\n");
+    
+    SetRegister(CONFIG_RESET_CALIB, CONFIG_RESET_CALIB_VALUE);
+    wait(0.5);
+    SetRegister(CONFIG_TIMEOUT_L, 0x03);
+    wait(0.1);
+    SetRegister(CONFIG_TIMEOUT_H, 0xff);
+    wait(0.1);
+    SetRegister(CONFIG_OUTCON, CONFIG_OUTCON_VALUE);
+    wait(0.1);
+    SetRegister(CONFIG_LPCON, SLEEP_16ms | CLK_16MHZ);
+    wait(0.1);
+    SetRegister(CONFIG_PROX_THRESH, CONFIG_PROX_THRESH_VALUE);
+    wait(0.1);
+    SetRegister(CONFIG_PRESS_THRESH, CONFIG_PRESS_THRESH_VALUE);
+    wait(0.5);
+    
+    printf("CONFIG_OUTCON:0x%02x\n", CONFIG_OUTCON_VALUE);
+    printf("CONFIG_PROX_THRESH:0x%02x\n", CONFIG_PROX_THRESH_VALUE);
+    printf("CONFIG_PRESS_THRESH:0x%02x\n", CONFIG_PRESS_THRESH_VALUE);
+    
+    return(0);
+}
+
+MTCH112::~MTCH112(void)
+{
+    
+};
+
+uint8_t MTCH112::MTCH112_GetState(void)
+{
+    return(GetRegister(OUTPUT_STATE));   
+}
+
+/** Private Functions */
+
+void MTCH112::SetRegister(uint8_t registerAddr, uint8_t data)
+{
+  char dataWrite[5];
+
+  dataWrite[0] = WRITE_PROTECT_BYTE_H;
+  dataWrite[1] = WRITE_PROTECT_BYTE_L;
+  dataWrite[2] = registerAddr;
+  dataWrite[3] = data;
+  dataWrite[4] = WRITE_PROTECT_BYTE_H ^ WRITE_PROTECT_BYTE_L ^ registerAddr ^ data;
+
+  m_i2c.write(m_addr, dataWrite, 5);
+}
+
+uint8_t MTCH112::GetRegister(uint8_t registerAddr)
+{
+  char dataWrite[1];
+  char dataRead[1];
+
+  dataWrite[0] = registerAddr;
+  dataRead[0] = 0x00;
+
+  m_i2c.write(m_addr, dataWrite, 1);
+  m_i2c.read(m_addr, dataRead, 1);
+  
+  return(dataRead[0]);
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mtch112.h	Thu Aug 23 06:17:50 2018 +0000
@@ -0,0 +1,74 @@
+#include <mbed.h>
+
+
+
+#define WRITE_PROTECT_BYTE_H      0x55
+#define WRITE_PROTECT_BYTE_L      0xAA
+
+//Configuration Registers
+#define CONFIG_RESET_CALIB        0x00
+#define CONFIG_OUTCON             0x01
+#define CONFIG_CALCON0            0x02
+#define CONFIG_CALCON1            0x03CONFIG_OUTCON_VALUE
+#define CONFIG_ADACQ0             0x04
+#define CONFIG_ADACQ1             0x05
+#define CONFIG_LPCON              0x06
+#define CONFIG_PRESS_THRESH       0x07
+#define CONFIG_PROX_THRESH        0x08
+#define CONFIG_TIMEOUT_L          0x09
+#define CONFIG_TIMEOUT_H          0x0A
+#define CONFIG_I2CADDR            0x0B
+
+#define CONFIG_RESET_CALIB_VALUE  0xFF
+#define CONFIG_OUTCON_VALUE       0x04
+#define CONFIG_PROX_THRESH_VALUE  0x14
+#define CONFIG_PRESS_THRESH_VALUE 0xFF
+
+//Read/Output Registers, readonly
+#define OUTPUT_STATE              0x80
+#define OUTPUT_READING0L          0X81
+#define OUTPUT_READING0H          0X82
+#define OUTPUT_READING1L          0X83
+#define OUTPUT_READING1H          0X84
+#define OUTPUT_BASELINE0L         0x85
+#define OUTPUT_BASELINE0H         0x86
+#define OUTPUT_BASELINE1L         0X87
+#define OUTPUT_BASELINE1H         0x88
+
+#define SLEEP_1ms                 0x00
+#define SLEEP_2ms                 0x02
+#define SLEEP_4ms                 0x04
+#define SLEEP_8ms                 0x06
+#define SLEEP_16ms                0x08
+#define SLEEP_32ms                0x0A
+#define SLEEP_64ms                0x0C
+#define SLEEP_128ms               0x0E
+#define SLEEP_256ms               0x10
+#define SLEEP_512ms               0x12
+#define SLEEP_1s                  0x14
+#define SLEEP_2s                  0x16
+#define SLEEP_4s                  0x18
+#define SLEEP_8s                  0x1A
+#define SLEEP_16S                 0x1C
+#define SLEEP_32s                 0x1E
+#define SLEEP_64s                 0x20
+#define SLEEP_128s                0x22
+#define SLEEP_256s                0x24
+#define CLK_32MHZ                 0x01
+#define CLK_16MHZ                 0x00
+
+
+class MTCH112
+{
+    public:
+        MTCH112(PinName sda, PinName scl, uint8_t addr);
+        ~MTCH112();
+        uint8_t MTCH112_Init(void);
+        uint8_t MTCH112_GetState(void);
+    
+    private:
+        I2C m_i2c;
+        uint8_t m_addr;
+        void SetRegister(uint8_t registerAddr, uint8_t data);  
+        uint8_t GetRegister(uint8_t registerAddr); 
+};
\ No newline at end of file