Uploaded_8_28_2020

Brother_Typewriter/Brother_Typewriter.c

@@ -0,0 +1,168 @@
+//
+//
+// File Name : Brother_Typewriter.c
+// Author : Ted Fried, MicroCore Labs
+// Creation : 8/27/2020
+// Code Type : Synthesizable
+//
+// Description:
+// ============
+//  
+// Arduino-Leonardo converter for UART to Brother Word Processor Typewriter
+//
+//
+//------------------------------------------------------------------------
+
+#define SHIFT_ON 0x80
+#define SHIFT_OFF 0x81
+
+
+unsigned int char_count=0;  
+unsigned int decoded_character=0;  
+unsigned int uart_character=0;  
+
+
+
+
+byte decoder_array[128] = {
+/*       0     1     2     3     4     5     6     7     8     9   */
+/* 0 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+/* 1 */ 0xb0, 0x00, 0x00, 0xb0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+/* 2 */ 0x00, 0x49, 0x4b, 0x38, 0x37, 0x39, 0x3f, 0x4c, 0x23, 0x16,
+/* 3 */ 0x0c, 0x8c, 0x04, 0x8c, 0xe4, 0xcc, 0x2c, 0xac, 0xec, 0xe4,
+/* 4 */ 0x9c, 0x0c, 0x1c, 0xbc, 0xe4, 0xb4, 0x74, 0xf4, 0x0c, 0x8c,
+/* 5 */ 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0xdc, 0xdc,
+/* 6 */ 0x00, 0xbc, 0x59, 0xf4, 0x4c, 0x86, 0x46, 0xc6, 0x26, 0xa6,
+/* 7 */ 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
+/* 8 */ 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e,
+/* 9 */ 0x5e, 0xba, 0x03, 0xba, 0x5e, 0xb4, 0x53, 0x86, 0x46, 0xc6,
+/* 10 */ 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6,
+/* 11 */ 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
+/* 12 */ 0x1e, 0x9e, 0x5e, 0xba, 0x5e, 0xba, 0x53, 0x55 };
+
+
+
+//------------------------------------------------------------------------
+//------------------------------------------------------------------------
+
+void setup()
+{
+  Serial.begin(300);    // UART to the Host
+  pinMode (10, INPUT) ; // hi-Z the CLK Pin
+  pinMode (11, INPUT) ; // hi-Z the DATA Pin
+  pinMode (12, OUTPUT) ;  
+}
+
+//------------------------------------------------------------------------
+//------------------------------------------------------------------------
+
+void pause()
+{
+  digitalWrite(12, LOW);
+  digitalWrite(12, LOW);
+  digitalWrite(12, LOW);
+  digitalWrite(12, LOW);
+  digitalWrite(12, LOW);
+  return;
+}
+
+
+//------------------------------------------------------------------------
+//------------------------------------------------------------------------
+
+void send_to_typewriter(unsigned char char_out)
+{
+
+  // Shift out the converted byte to the typewriter.
+  // Send as "open collector", or drive logic '0', but
+  // let bus go high-impedance (turn off IO output) for logic '1'
+  //
+  
+  if ((char_out&0x80) != 0) pinMode (11, INPUT); else pinMode (11, OUTPUT); pause(); // DATA 7
+  pinMode (10, OUTPUT); pause(); // CLK = 0
+  pinMode (10, INPUT); pause(); // CLK = hi-Z
+ 
+  if ((char_out&0x40) != 0) pinMode (11, INPUT); else pinMode (11, OUTPUT); pause(); // DATA 6
+  pinMode (10, OUTPUT); pause(); // CLK = 0
+  pinMode (10, INPUT); pause(); // CLK = hi-Z
+ 
+  if ((char_out&0x20) != 0) pinMode (11, INPUT); else pinMode (11, OUTPUT); pause(); // DATA 5
+  pinMode (10, OUTPUT); pause(); // CLK = 0
+  pinMode (10, INPUT); pause(); // CLK = hi-Z
+ 
+  if ((char_out&0x10) != 0) pinMode (11, INPUT); else pinMode (11, OUTPUT); pause(); // DATA 4
+  pinMode (10, OUTPUT); pause(); // CLK = 0
+  pinMode (10, INPUT); pause(); // CLK = hi-Z
+ 
+  if ((char_out&0x08) != 0) pinMode (11, INPUT); else pinMode (11, OUTPUT); pause(); // DATA 3
+  pinMode (10, OUTPUT); pause(); // CLK = 0
+  pinMode (10, INPUT); pause(); // CLK = hi-Z
+ 
+  if ((char_out&0x04) != 0) pinMode (11, INPUT); else pinMode (11, OUTPUT); pause(); // DATA 2
+  pinMode (10, OUTPUT); pause(); // CLK = 0
+  pinMode (10, INPUT); pause(); // CLK = hi-Z
+ 
+  if ((char_out&0x02) != 0) pinMode (11, INPUT); else pinMode (11, OUTPUT); pause(); // DATA 1
+  pinMode (10, OUTPUT); pause(); // CLK = 0
+  pinMode (10, INPUT); pause(); // CLK = hi-Z
+ 
+  if ((char_out&0x01) != 0) pinMode (11, INPUT); else pinMode (11, OUTPUT); pause(); // DATA 0
+  pinMode (10, OUTPUT); pause(); // CLK = 0
+  pinMode (10, INPUT); pause(); // CLK = hi-Z
+
+ 
+  pinMode (11, INPUT) ; // hi-Z the DATA Pin
+
+  return;
+}
+
+  
+//------------------------------------------------------------------------
+//------------------------------------------------------------------------
+
+void caps_on(unsigned char char_in)  
+{
+  // Send the SHIFT key to the typewriter if required.
+  //
+  if (uart_character>62 && uart_character<92) send_to_typewriter(SHIFT_ON);
+  if (uart_character!=39 && uart_character>32 && uart_character<44) send_to_typewriter(SHIFT_ON);
+  return;
+}
+
+//------------------------------------------------------------------------
+//------------------------------------------------------------------------
+
+void caps_off(unsigned char char_in)  
+{
+  // Debounce the SHIFT key to the typewriter.
+  //
+  if (uart_character>62 && uart_character<92) send_to_typewriter(SHIFT_OFF);
+  if (uart_character!=39 && uart_character>32 && uart_character<44) send_to_typewriter(SHIFT_OFF);
+  return;
+}
+
+//------------------------------------------------------------------------
+//------------------------------------------------------------------------
+
+void loop()
+{
+
+  // Poll the Host-side UART for characters to send to the typewriter.
+  // Decode the ASCII characters into the sequence of commands to send to the typewriter.
+  //
+  if (Serial.available())
+  {
+  uart_character = Serial.read();
+  decoded_character = decoder_array[uart_character];
+
+  caps_on(uart_character);
+  delay(1);
+  send_to_typewriter(decoded_character);
+  delay(1);
+  caps_off(uart_character);
+  delay(1);
+
+  }
+ 
+}
+ 

README.md

@@ -26,6 +26,7 @@ Misc:
 
     Wheelwriter  - FPGA based Printer Option for the IBM Wheelwriter 5
     Wheelwriter2 - Arduino Leonardo based Printer Option for the IBM Wheelwriter 5
+	Brother Typewriter - Arduino Leonardo converts Serial RX to a Brother Word Processor
     
         
 For questions email me at www.MicroCoreLabs.com