Diff: main.cpp

Revision:

0:3f43ed494764

Child:

1:93504aad8a05

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Sep 28 03:32:27 2017 +0000
@@ -0,0 +1,146 @@
+#include "mbed.h"
+#include "font_5x7.h"
+
+struct UART_buf
+{ 
+    uint8_t STA;
+    uint8_t MODE; 
+    uint8_t CMD;
+    uint8_t LEN;
+    uint8_t DATA[32];
+    uint8_t END; 
+};
+ 
+// I2C address
+int DoT_ADDR = 0x71<<1;
+
+I2C Dotmatrix(I2C_SDA, I2C_SCL);
+
+char Data_BUF[17] = {0, 0 ,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+
+Serial SerialUART(PA_2, PA_3);
+
+UART_buf RX_BUF;
+
+void SerialUARTRX_ISR(void);
+void data_write(char *data, int len);
+void Command_Write(uint8_t com);
+void Dotmatrix_init(void);
+void char_data_write(char data);
+
+int main() {
+    
+    SerialUART.baud(115200);
+    
+    SerialUART.attach(&SerialUARTRX_ISR);
+    
+    Dotmatrix_init();
+    
+    while(1)
+    {
+    }
+}
+
+void SerialUARTRX_ISR(void)
+{
+    static uint8_t RX_count = 0, RX_Len = 32, RX_Status = 0;
+    uint8_t rx_da = SerialUART.getc();
+    switch(RX_Status)
+    {
+        case 0:
+            if(rx_da == 0x76)
+            {
+                RX_BUF.STA = rx_da;
+                RX_Status++;
+            }
+            break;
+        case 1:
+            RX_BUF.MODE = rx_da;
+            RX_Status++;
+            break;
+        case 2:
+            RX_BUF.CMD = rx_da;
+            RX_Status++;
+            break;
+        case 3:
+            RX_BUF.LEN = rx_da;
+            RX_Len = RX_BUF.LEN;
+            RX_Status++;
+            if(RX_Len == 0)
+                RX_Status++;
+            break;
+        case 4:
+            RX_BUF.DATA[RX_count] = rx_da;
+            RX_count++;
+            if(RX_count == RX_Len)
+            {
+                RX_Status++;
+                RX_count = 0;
+                RX_Len = 32;
+            }
+            break;
+        case 5:
+            if(rx_da == 0x3E)
+            {
+                RX_BUF.END = rx_da;
+                RX_Status = 0;
+                switch(RX_BUF.MODE)
+                {
+                    case 0x01:
+                        if(RX_BUF.CMD == 0x17)
+                        {
+                            char_data_write(RX_BUF.DATA[0]);
+                        }
+                        break;
+                }
+            }
+            break;
+    }
+}
+
+void data_write(char *data, int len)
+{
+    data[0] = 0;
+    Dotmatrix.write(DoT_ADDR, data, len);
+}
+
+void Command_Write(char com)
+{
+    Dotmatrix.write(DoT_ADDR, &com, 1);
+}
+
+void Dotmatrix_init(void)
+{
+    // Internal System Clock enable
+    Command_Write((char)0x21);
+    // INT/ROW output pin Set -> ROW Driver output
+    Command_Write((char)0xA0);
+    // Dimming Set -> 15
+    Command_Write((char)0xEF);
+    // Blinking Set -> off
+    // Display Set -> on
+    Command_Write((char)0x81);
+}
+
+void char_data_write(char data)
+{
+    uint8_t read_c, i, j, c_buff[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+    for(i=0; i<5; i++)
+    {
+        read_c = font[data-0x20][i];
+        if(read_c)
+        {
+            for(j=0; j<8; j++)
+            {
+                if(read_c & (0x80 >> j))
+                {
+                    c_buff[j] |= (0x01 << (i+1));
+                }
+            }
+        }
+    }
+    for(i=0; i<8; i++)
+        Data_BUF[i*2+1] = c_buff[i];
+
+    data_write(Data_BUF, 17);
+}