Revision 1:8936ddb97551, committed 2018-06-24

Comitter:

Kentaro Okuda

Date:

Sun Jun 24 09:40:19 2018 -0400

Parent:

0:8c7de3096cac

Child:

2:f6c4ed9cbf0e

Commit message:

initial commit

Changed in this revision

--- a/MAX6955.cpp	Tue Aug 02 14:10:14 2011 +0000
+++ b/MAX6955.cpp	Sun Jun 24 09:40:19 2018 -0400
@@ -1,8 +1,13 @@
+/**
+ * @file MAX6955.cpp
+ */
+
 #include "MAX6955.h"
 
 MAX6955::MAX6955(PinName sda, PinName scl, char driver): i2c_(sda, scl), driver_(driver){}
 
-int MAX6955::write(char command, char data){
+
+int MAX6955::write(char command, char data) {
     char i2cData[2];
     i2cData[0] = command;
     i2cData[1] = data;
@@ -11,13 +16,23 @@
     return result;
 }
 
-int MAX6955::writeS(char* buffer){
-    int result = i2c_.write(driver_, (char *) buffer, 8);
+int MAX6955::writeS(char* buffer) {
+    int i;
+    char i2cData[9];
+    i2cData[0] = 0x20; // first digit
+    for (i = 0; i < 8; i++) {
+        if (buffer[i] < 32 || buffer[i] > 126) { // make sure its printable
+            i2cData[i+1] = 32; // if not, replace it with "space"
+        } else {
+            i2cData[i+1] = buffer[i];
+        }
+    }
+    int result = i2c_.write(driver_, (char *) i2cData, 9);
     wait(0.07);
     return result;
 }
 
-int MAX6955::init(){
+int MAX6955::init(void) {
     int result = 0;
     result = result + write(reg_decodeMode, 0x00);
     result = result + write(reg_scanLimit, 0x07);

--- a/MAX6955.h	Tue Aug 02 14:10:14 2011 +0000
+++ b/MAX6955.h	Sun Jun 24 09:40:19 2018 -0400
@@ -1,8 +1,15 @@
+/**
+ * @file MAX6955.h
+ * @brief MAX6955 I2C driver
+ *
+ */
+
 #ifndef MAX6955_H
 #define MAX6955_H
 
 #include "mbed.h"
 
+// max6955 commands
 #define reg_noOp 0x00
 #define reg_decodeMode 0x01
 #define reg_globalIntensity 0x02
@@ -42,16 +49,44 @@
 #define reg_digit6a 0x6E
 #define reg_digit7a 0x6F
 
-class MAX6955{
+
+class MAX6955 {
     public:
         /* 
          * @param sda mbed pin for I2C SDA
          * @param scl mbed pin for I2C SCL
          * @param driver I2C device address
          */
-        MAX6955(PinName sda, PinName scl, char driver);   
+        MAX6955(PinName sda, PinName scl, char driver); 
+
+        /**
+         * @brief This function writes command and data.
+         *
+         * @param command
+         *     MAX6955 command.
+         * @param data
+         *     data to write.
+         *
+         * @return[int] result
+         */
         int write(char command, char data);
+
+
+        /**
+         * @brief This function writes string.
+         *
+         * @param pointer to buffer
+         *
+         * @return result
+         */
         int writeS(char* buffer);
+
+
+        /**
+         * @brief init function.
+         *
+         * @return result
+         */
         int init(void);
         
     private: