Diff: YDwifi/YDwifi_uartmsg.cpp

Revision:

0:61c402886fbb

Child:

1:c6e5f49dce5f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/YDwifi/YDwifi_uartmsg.cpp	Thu Mar 06 11:13:00 2014 +0000
@@ -0,0 +1,80 @@
+#include "YDwifi_uartmsg.h"
+
+C_YD_UartMsg::C_YD_UartMsg()
+{
+}
+
+unsigned short C_YD_UartMsg::makePayload( unsigned int cmd_len, unsigned char *cmd_p, unsigned char *payload_p )
+{
+    unsigned short payload_len = 0;
+    int i;
+    
+    for( i = 0; i < cmd_len; i++, payload_p++, payload_len++ )
+    {
+        /* check Escape code */
+        if( ( cmd_p[i] == UART_CMD_SOM ) || ( cmd_p[i] == UART_CMD_EOM ) || ( cmd_p[i] == UART_CMD_ESC ) )
+        {
+            /* Add ESC */
+            *payload_p = UART_CMD_ESC;
+            payload_len++;
+            
+            payload_p++;
+            *payload_p = (0x80 | cmd_p[i]);
+        }
+        else
+        {
+            *payload_p = cmd_p[i];
+        }
+    }
+    
+    return payload_len;
+}
+
+unsigned int C_YD_UartMsg::makeRequest( unsigned char cmd_id,unsigned char *payload_p
+                                , unsigned short payload_len, unsigned char *uart_command_p )
+{
+    unsigned char check_sum = 0;    // Check Sum
+    unsigned int  uart_cmd_len = 0;
+    int i;
+    
+    // set SOM
+    *uart_command_p = UART_CMD_SOM;
+    uart_command_p++;
+    uart_cmd_len++;
+    
+    // set payload length L0
+    *uart_command_p = (0x80 | (payload_len & 0x007f));
+    check_sum += *uart_command_p;
+    uart_command_p++;
+    uart_cmd_len++;
+
+    // set payload length L1
+    *uart_command_p = (0x80 | ( (payload_len >> 7) & 0x003f));
+    check_sum += *uart_command_p;
+    uart_command_p++;
+    uart_cmd_len++;
+    
+    // set Command ID
+    *uart_command_p = (0x80 | cmd_id);
+    check_sum += *uart_command_p;
+    uart_command_p++;
+    uart_cmd_len++;
+
+    // set Payload
+    for( i = 0; i < payload_len; i++, uart_command_p++, uart_cmd_len++ )
+    {
+        *uart_command_p = payload_p[i];
+        check_sum += *uart_command_p;
+    }
+
+    // set Check sum
+    *uart_command_p = (0x80 | check_sum);
+    uart_command_p++;
+    uart_cmd_len++;
+    
+    // set EOM
+    *uart_command_p = UART_CMD_EOM;
+    uart_cmd_len++;
+    
+    return uart_cmd_len;
+}