From cbc941282074856fc6179761b70a0c9879b0b64d Mon Sep 17 00:00:00 2001
From: Yves Fischer <yvesf-git@xapek.org>
Date: Tue, 11 Oct 2011 21:56:36 +0200
Subject: update firmware to @319

---
 firmware/i2c.c | 113 +++++++++++++++++++++++++++------------------------------
 1 file changed, 53 insertions(+), 60 deletions(-)

(limited to 'firmware/i2c.c')

diff --git a/firmware/i2c.c b/firmware/i2c.c
index b7d55fe..4baa7bb 100644
--- a/firmware/i2c.c
+++ b/firmware/i2c.c
@@ -36,9 +36,12 @@
 #include "common.h"
 #include "protocol.h"
 #include "i2c.h"
+#define I2C_WAIT_FOR_COMPLETE() while (!(TWCR & (1<<TWINT)));
+
+void i2c_parser(char *buf)
+{
+  answer[0] = buf[0];
 
-void i2c_parser(char *buf) {
-answer[0] = buf[0];
   switch(buf[0]){
     case CMD_I2C_INIT:
       i2c_init_usb();
@@ -49,45 +52,32 @@ answer[0] = buf[0];
     case CMD_I2C_SET_BITRATE:  
       i2c_set_bitrate_usb((char)buf[2]);
       break;
-    case CMD_I2C_SEND_BYTE:
-      i2c_send_byte_usb((int)buf[2]);
+
+    case CMD_I2C_SEND:
+      i2c_send_usb((int)buf[2], &buf[3]);
       break;
-    case CMD_I2C_RECV_BYTES:
-      i2c_reveice_bytes_usb((int)buf[3],(int)buf[1]-4, (int)buf[2]);
+    case CMD_I2C_RECV:
+      i2c_recv_usb((int)buf[2],(int)buf[3]);
       break;
+
     case CMD_I2C_SEND_START:
       i2c_send_start_usb();
       break;
     case CMD_I2C_SEND_STOP:
       i2c_send_stop_usb();
       break;
+
     default:
-      answer[0]=buf[0];
-      answer[1]=RSP_UNKOWN_CMD;
-      answer[2]=0;
+      answer[1] = RSP_UNKOWN_CMD;
+      answer[2] = 0;
       CommandAnswer(3);
   }
 }
 
 
-unsigned char i2c_get_twsr(void)
-{
-  return (TWSR & 0xF8);
-}
-
-
-void i2c_wait_for_complete(void)
-{
-  while (!(TWCR & (1<<TWINT))){
-    //do nothing just wait
-    ;
-  }
-}
-
 
 void i2c_init_usb(void)
 {
-  answer[0]=CMD_I2C_INIT;
   answer[1]=(unsigned char)i2c_init();
   answer[2]=0;
   CommandAnswer(3);
@@ -105,7 +95,6 @@ int i2c_init(void)
 
 void i2c_deinit_usb(void)
 {
-  answer[0]=CMD_I2C_DEINIT;
   answer[1]=(unsigned char)i2c_deinit();
   answer[2]=0;
   CommandAnswer(3);
@@ -114,17 +103,16 @@ void i2c_deinit_usb(void)
 int i2c_deinit(void)
 {
   TWCR &= ~(1<<TWEN); // deinit
-  octopus.ports[12]=PIN_OUT;  // this is wrong!
-  octopus.ports[13]=PIN_OUT;  // this is wrong!
+  octopus.ports[12]=PIN_NONE;
+  octopus.ports[13]=PIN_NONE;
 
   return RSP_OK;
 }
 
 
 void i2c_set_bitrate_usb(char bitrate) {
-  answer[0] = CMD_I2C_SET_BITRATE;
   answer[1] = (unsigned char)i2c_set_bitrate(bitrate);
-  answer[2] =  '\0';
+  answer[2] =  0;
   CommandAnswer(3);
 }
 
@@ -140,77 +128,82 @@ int i2c_set_bitrate(char bitrate) {
 
 void i2c_send_start_usb(void)
 {
-  answer[0] = CMD_I2C_SEND_START;
   answer[1] = (unsigned char)i2c_send_start();
-  answer[2] = '\0';
+  answer[2] = 0;
   CommandAnswer(3);
 }
 
+unsigned char i2c_get_twsr(void)
+{
+  return (TWSR & 0xF8);
+}
+
 int i2c_send_start(void)
 {
   i2c_get_twsr();
   TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
-  i2c_wait_for_complete();
+  I2C_WAIT_FOR_COMPLETE();
   return RSP_OK;
 }
 
+
+
+
 void i2c_send_stop_usb(void)
 {
-  answer[0]=CMD_I2C_SEND_STOP;
   answer[1]=(unsigned char)i2c_send_stop();
   answer[2]=0;
   CommandAnswer(3);
 }
 
-
 int i2c_send_stop(void)
 {
   TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO);
+  while(TWCR & (1<<TWSTO));
   return RSP_OK;
 }
 
 
-void i2c_send_byte_usb(char data)
+void i2c_send_usb(int length, char *data)
 {
-  i2c_send_byte(data);
+  i2c_send(data, length);
 
-  answer[0] = CMD_I2C_SEND_BYTE;
   answer[1] = RSP_OK;
-  answer[2] = '\0';
+  answer[2] = 0;
   CommandAnswer(3);
 }
 
-void i2c_send_byte(char data)
+void i2c_send(char *data, int length)
 {
-  TWDR = data;
-  TWCR = (1<<TWINT) | (1<<TWEN);
-  i2c_wait_for_complete();
+  int i;
+
+  for(i = 0; i < length; i++) {
+    TWDR = data[i];
+    TWCR = (1<<TWINT) | (1<<TWEN);
+    I2C_WAIT_FOR_COMPLETE();
+  }
 }
 
-void i2c_reveice_bytes_usb(int address,int len, int timeout)
+
+void i2c_recv_usb(int address, int length)
 {
-    /* receive */
-    //i2c_get_twsr(); 
-    //print_hex(s);
-
-    //i2c_send_start();
-    /* slave address = 0x10; */
-    //buf[3] = (0x10 << 1)|1;  /* (00010000<<1) | R */
-    //i2c_send_byte( (0x10 << 1)|1);
-    
-    
-  answer[0]=CMD_I2C_RECV_BYTES;
+  int i;
+
+  answer[0]=CMD_I2C_RECV;
   answer[1]=RSP_OK;
-  answer[2]=1;
-  answer[3]=i2c_receive_byte();
-  CommandAnswer(5);
+
+  for(i = 0; i < length; i++)
+    answer[2+i] = i2c_recv_byte();
+
+  answer[length+2] = 0;
+
+  CommandAnswer(3+length);
 }
 
 
-unsigned char i2c_receive_byte(void)
+unsigned char i2c_recv_byte(void)
 {
   TWCR = (1<<TWINT) | (1<<TWEN);
-  i2c_wait_for_complete();
+  I2C_WAIT_FOR_COMPLETE();
   return TWDR;
 }
-
-- 
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