prosjekt.X/i2c.c

@@ -8,7 +8,9 @@
 // read request
 volatile bool last_action_write = false;
 
-volatile uint8_t i2c_recv[I2C_RECV_BUF_SIZE] = {0};
+// Buffer to hold the received data
+volatile uint8_t i2c_recv_buf[I2C_RECV_BUF_SIZE] = {0};
+// Counter to know which datapoint we're on
 volatile uint8_t i2c_recv_len = 0;
 
 void init_i2c(void) {
@@ -45,7 +47,7 @@ void init_i2c(void) {
 void i2c_reset_recv() {
   i2c_recv_len = 0;
   for (int i = 0; i < I2C_RECV_BUF_SIZE; i++) {
-    i2c_recv[i] = 0;
+    i2c_recv_buf[i] = 0;
   }
 }
 
@@ -56,7 +58,7 @@ void i2c_write_handler(uint8_t data) {
   if (i2c_recv_len >= I2C_RECV_BUF_SIZE) { return; }
   
   // Write the data to the receive buffer
-  i2c_recv[i2c_recv_len] = data;
+  i2c_recv_buf[i2c_recv_len] = data;
   i2c_recv_len++;
 }
 
@@ -69,10 +71,10 @@ void i2c_read_handler() {
 void i2c_stop_handler() {
   if (last_action_write) {
     // Parse the received command data
-    parse_command(i2c_recv, i2c_recv_len);
+    parse_command(i2c_recv_buf, i2c_recv_len);
     
     // If the received command is a write only command we want to route it now.
-    if (i2c_recv[0] == CLEAR_BULK_FAN_SPEED || i2c_recv[0] == WRITE_CONFIG) {
+    if (i2c_recv_buf[0] == CLEAR_BULK_FAN_SPEED || i2c_recv_buf[0] == WRITE_CONFIG) {
         route_command(0);
     }
   }

prosjekt.X/i2c.h

@@ -20,8 +20,9 @@ extern "C" {
 #include <stdbool.h>
 #include <util/twi.h>
 
-// Received data info
-#define I2C_RECV_BUF_SIZE 64
+// Received data buffer size
+// The size is larger than any expected command lenght
+#define I2C_RECV_BUF_SIZE 16
 
 // Reset recv to initial state
 void i2c_reset_recv();