Diff: main.cpp

Revision:

0:24e90e3ca3f4

Child:

1:3a338e553a54

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Oct 05 07:02:51 2016 +0000
@@ -0,0 +1,113 @@
+#include "mbed.h"
+
+#define DEBUG_SPI
+
+#ifdef DEBUG_SPI
+#define PRINTD(arg1,arg2...)    printf(arg1,##arg2)
+#endif
+
+SPISlave spislave(PA_7, PA_6, PA_5, PA_4); // MOSI, MISO, SCLK(CLK), SSEL(CS)=NC
+Serial pc(USBTX, USBRX);
+
+void SPI_SlaveInit()
+{
+    PRINTD("Set the SPI SLAVE format\n");
+    spislave.format(8,0); // setup 8bit 0 mode
+    PRINTD("Set the SPI SLAVE frequency\n");
+    spislave.frequency(); // default 1MHz
+}
+
+void SPI_SlaveWrite()
+{
+    char tx_buffer[255]={0};
+    char reply;
+    char i;
+    char temp;
+    char tx_cnt = 0;
+    int value;
+    PRINTD("Input Strging=");
+    while(1)
+    {
+        
+        temp=getchar();
+        tx_buffer[tx_cnt++]=temp;
+        if(temp==0x0d)
+        {
+            tx_buffer[tx_cnt]=0;
+            PRINTD("\nData send Finish...\n");
+            for(i=0;i<=tx_cnt;++i)
+            {
+                PRINTD("%c[%02x]",tx_buffer[i],tx_buffer[i]);
+            }
+            PRINTD("\n\n");
+            for(i=0;i<=tx_cnt;++i)
+            {
+                value=tx_buffer[i];
+                PRINTD("write[%d]=%c[%02x]\n",i,value,value);
+                spislave.reply(value);
+            }
+            for(i=0;i<tx_cnt;++i)
+            {
+                tx_buffer[i]=0;
+                PRINTD("init_tx_buf[%d]=%c\n",i,tx_buffer[i]);
+            }
+            tx_cnt=0;
+            PRINTD("break\n");
+            break;
+        }
+        else
+        {
+            PRINTD("%c[%02x]",tx_buffer[tx_cnt],tx_buffer[tx_cnt]);
+        }
+    }
+    return;
+}
+
+int main()
+{
+    int i;
+    char valueFromMaster;
+    char rx_buffer[255]={0};
+    char rx_cnt = -1;
+    PRINTD("\n=========SLAVE=========\n");
+    SPI_SlaveInit();
+    
+    while(1)
+    {
+
+        if(spislave.receive())
+        { 
+            PRINTD("----1\n");
+            if(pc.readable())
+            {
+                SPI_SlaveWrite();
+            }
+            PRINTD("----2\n");
+            valueFromMaster = spislave.read();
+            PRINTD("----3\n");
+            //PRINTD("valueFromMaster=");
+            //PRINTD("[%c]%x\n",valueFromMaster,valueFromMaster);
+            rx_buffer[++rx_cnt]=valueFromMaster;
+            if(valueFromMaster==0)
+            {   
+                PRINTD("rx_string=");
+                for(i=0;i<rx_cnt;i++) 
+                {    
+                    PRINTD("%c",rx_buffer[i]);
+                }
+                PRINTD("\n");
+                for(i=0;i<=rx_cnt;i++)
+                {
+                    rx_buffer[i]=0;
+                    PRINTD("Init_rx_buf[%d]=%c\n",i,rx_buffer[i]);
+                }
+                rx_cnt=-1;
+               
+            }//valueFromMaster if
+            
+        }// spislave.receive() if
+     /*
+                
+            */
+    }//end of while
+}//end of main