Add command to change arducontrol baud rate

[model-railway-devices.git] / arducontrol / interface.c

diff --git a/arducontrol/interface.c b/arducontrol/interface.c
index 63b1ebd1700b0c11d1e193ed1b0c1c3ef4eb0a91..a73189648669345eda9a8589bc7d56ab9e94f12d 100644 (file)
--- a/arducontrol/interface.c
+++ b/arducontrol/interface.c
@@ -1,4 +1,5 @@
 #include <avr/io.h>
+#include "clock.h"
 #include "interface.h"
 #include "mfx.h"
 #include "monitor.h"
@@ -10,15 +11,19 @@
 static uint8_t cmd_buffer[15];
 static uint8_t cmd_length = 0;
 static uint8_t cmd_read_pos = 0;
+static uint16_t baud_rate = 9600;
+static uint16_t baud_change = 0;
+static uint32_t baud_changed_at = 0;
 
 static uint8_t dispatch_command(const uint8_t *, uint8_t);
+uint8_t interface_command(const uint8_t *, uint8_t);
 
 void interface_init(void)
 {
        DDRB |= 0x01;
        DDRD = (DDRD&0xFC)|0x02;
 
-       serial_init(9600);
+       serial_init(baud_rate);
 }
 
 void interface_check(void)
@@ -61,6 +66,21 @@ void interface_check(void)
                }
                PORTB &= ~0x01;
        }
+
+       if(baud_change)
+       {
+               if(!baud_changed_at)
+               {
+                       baud_changed_at = clock_get();
+                       serial_set_baud(baud_change);
+               }
+               else if(clock_get()-baud_changed_at>3*CLOCK_RATE)
+               {
+                       baud_change = 0;
+                       serial_set_baud(baud_rate);
+                       interface_send1(BAUD_CHANGE_FAILED);
+               }
+       }
 }
 
 static uint8_t dispatch_command(const uint8_t *cmd, uint8_t length)
@@ -80,6 +100,8 @@ static uint8_t dispatch_command(const uint8_t *cmd, uint8_t length)
                return mfx_command(cmd, length);
        else if(type==3)
                return s88_command(cmd, length);
+       else if(type==7)
+               return interface_command(cmd, length);
        else
                return INVALID_COMMAND;
 }
@@ -96,3 +118,31 @@ void interface_send1(uint8_t cmd)
        serial_write(0xFE);
        serial_write(cmd);
 }
+
+uint8_t interface_command(const uint8_t *cmd, uint8_t length)
+{
+       if(cmd[0]==SET_BAUD_RATE)
+       {
+               if(length!=3)
+                       return LENGTH_ERROR;
+
+               uint16_t baud = (cmd[1]<<8)|cmd[2];
+               if(baud!=baud_rate)
+               {
+                       if(baud!=baud_change)
+                       {
+                               baud_change = baud;
+                               baud_changed_at = 0;
+                       }
+                       else
+                       {
+                               baud_rate = baud_change;
+                               baud_change = 0;
+                       }
+               }
+       }
+       else
+               return INVALID_COMMAND;
+
+       return COMMAND_OK;
+}