firmware merging

updating of install script - consolidation udev into driver and adding to main install

driver/install.sh

@@ -8,7 +8,8 @@ NC='\033[0m' # No Color
 ERROR="0"
 
 BUILD_DIR="build"
-
+BLOB_CREATOR_DIR="../software/utils/"
+USERSPACE_SMI_DIR="../software/libcariboulite/src/caribou_smi/kernel"
 
 [ $(id -u) = 0 ] && printf "${RED}Please do not run this script as root${NC}\n" && exit 100
 
@@ -29,9 +30,15 @@ install() {
     fi
     
     # enter build dir and build the ko file
-    cd "$BUILD_DIR"
+    cd "${ROOT_DIR}/$BUILD_DIR"
     cmake ../
     make
+    cd ${ROOT_DIR}
+    
+    # copy the outputs to internal software
+    ${BLOB_CREATOR_DIR}generate_bin_blob ${ROOT_DIR}/$BUILD_DIR/smi_stream_dev.ko smi_stream_dev ${USERSPACE_SMI_DIR}/smi_stream_dev_gen.h
+    cp ${ROOT_DIR}/bcm2835_smi.h ${USERSPACE_SMI_DIR}
+    cp ${ROOT_DIR}/smi_stream_dev.h ${USERSPACE_SMI_DIR}
     
     # find the location to install
     output_dir=$(find "/lib/modules" -type f -name "bcm2835_smi_dev*" -exec dirname {} \;)
@@ -45,8 +52,8 @@ install() {
     fi
     
     printf "\n[  3  ] ${GREEN}Installing into '${output_dir}'${NC}\n"
-    xz -z smi_stream_dev.ko -c > smi_stream_dev.ko.xz
-    sudo cp smi_stream_dev.ko.xz ${output_dir}/
+    xz -z ${ROOT_DIR}/$BUILD_DIR/smi_stream_dev.ko -c > ${ROOT_DIR}/$BUILD_DIR/smi_stream_dev.ko.xz
+    sudo cp ${ROOT_DIR}/$BUILD_DIR/smi_stream_dev.ko.xz ${output_dir}/
     
     printf "\n[  4  ] ${GREEN}Updating 'depmod'${NC}\n"
     sudo depmod -a
@@ -59,6 +66,11 @@ install() {
     echo "# load SMI stream driver on startup" | sudo tee "/etc/modules-load.d/smi_stream_mod.conf" > /dev/null
     echo "smi_stream_dev" | sudo tee -a "/etc/modules-load.d/smi_stream_mod.conf" > /dev/null
     
+    printf "\n[  7  ] ${GREEN}Adding UDEV rules${NC}\n"
+    cd ${ROOT_DIR}/udev
+    sudo ./install.sh install
+    cd ${ROOT_DIR}
+    
     printf "${GREEN}Installation completed.${NC}\n"
 }
 
@@ -90,6 +102,9 @@ uninstall() {
         sudo rm "/etc/modules-load.d/smi_stream_mod.conf"
     fi
     
+    printf "\n[  5  ] ${GREEN}Removing UDEV rules${NC}\n"
+    sudo udev/install.sh uninstall
+    
     printf "${GREEN}Uninstallation completed.${NC}\n"
 }
 

driver/udev/install.sh

@@ -20,8 +20,8 @@ uninstall() {
 
 
 ## FLOW
-printf "${GREEN}CaribouLite UDEV Rules (un)installation${NC}\n"
-printf "${GREEN}=======================================${NC}\n\n"
+printf "CaribouLite UDEV Rules (un)installation\n"
+printf "=======================================\n\n"
 
 if [ "$1" == "install" ]; then
     install
@@ -32,6 +32,6 @@ elif [ "$1" == "uninstall" ]; then
     
     exit 0
 else
-    printf "${CYAN}Usage: $0 [install|uninstall]${NC}\n"
+    printf "Usage: $0 [install|uninstall]\n"
     exit 1
 fi

firmware/Makefile

@@ -5,7 +5,7 @@ pcf_file = ./io.pcf
 top.bin:
 	yosys -p 'synth_ice40 -top top -json $(filename).json -blif $(filename).blif' -p 'ice40_opt' -p 'fsm_opt' $(filename).v
 	#nextpnr-ice40 --lp1k --package qn84 --json $(filename).json --pcf $(pcf_file) --asc $(filename).asc
-	nextpnr-ice40 --lp1k --package qn84 --json $(filename).json --pcf $(pcf_file) --asc $(filename).asc --freq 80 --parallel-refine --opt-timing --placer-heap-timingweight 10
+	nextpnr-ice40 --lp1k --package qn84 --json $(filename).json --pcf $(pcf_file) --asc $(filename).asc --freq 64 --parallel-refine --opt-timing --timing-allow-fail
 	#nextpnr-ice40 --json blinky.json --pcf blinky.pcf --asc blinky.asc --gui
 	icepack $(filename).asc $(filename).bin
 

firmware/lvds_rx.v

@@ -5,7 +5,7 @@ module lvds_rx (
 
     input             i_fifo_full,
     output            o_fifo_write_clk,
-    output            o_fifo_push,
+    output reg        o_fifo_push,
     output reg [31:0] o_fifo_data,
     input             i_sync_input,
     output     [ 1:0] o_debug_state
@@ -22,7 +22,6 @@ module lvds_rx (
   reg [2:0] r_phase_count;
   reg r_sync_input;
 
-
   // Initial conditions
   initial begin
     r_state_if = state_idle;
@@ -45,25 +44,23 @@ module lvds_rx (
         state_idle: begin
           if (i_ddr_data == modem_i_sync) begin
             r_state_if   <= state_i_phase;
-            o_fifo_data  <= {30'b000000000000000000000000000000, i_ddr_data};
+            o_fifo_data[1:0]  <= 2'b10;
             r_sync_input <= i_sync_input;  // mark the sync input for this sample
           end
-          r_phase_count <= 3'b111;
+          r_phase_count <= 3'b110;
           o_fifo_push   <= 1'b0;
         end
 
         state_i_phase: begin
-          if (r_phase_count == 3'b000) begin
+          if (r_phase_count == 3'b111) begin
             if (i_ddr_data == modem_q_sync) begin
-              r_phase_count <= 3'b110;
               r_state_if <= state_q_phase;
             end else begin
               r_state_if <= state_idle;
             end
-          end else begin
-            r_phase_count <= r_phase_count - 1;
-          end
-
+          end 
+          
+          r_phase_count <= r_phase_count - 1;
           o_fifo_push <= 1'b0;
           o_fifo_data <= {o_fifo_data[29:0], i_ddr_data};
         end
@@ -72,13 +69,12 @@ module lvds_rx (
           if (r_phase_count == 3'b000) begin
             o_fifo_push <= ~i_fifo_full;
             r_state_if  <= state_idle;
-            o_fifo_data <= {o_fifo_data[29:0], i_ddr_data[1], 1'b0};
           end else begin
             o_fifo_push   <= 1'b0;
-            r_phase_count <= r_phase_count - 1;
-            o_fifo_data   <= {o_fifo_data[29:0], i_ddr_data};
           end
 
+          o_fifo_data   <= {o_fifo_data[29:0], i_ddr_data};
+          r_phase_count <= r_phase_count - 1;
         end
       endcase
     end

firmware/sys_ctrl.v

@@ -10,8 +10,6 @@ module sys_ctrl
         input               i_fetch_cmd,
         input               i_load_cmd,
 
-        input [7:0]         i_error_list,
-
         // controls output
         output              o_debug_fifo_push,
         output              o_debug_fifo_pull,
@@ -62,7 +60,6 @@ module sys_ctrl
                     ioc_module_version: o_data_out <= module_version;
                     ioc_system_version: o_data_out <= system_version;
                     ioc_manu_id: o_data_out <= manu_id;
-                    ioc_error_state: o_data_out <= i_error_list;
                 endcase
             end
             //=============================================

firmware/top.v

@@ -138,11 +138,9 @@ module top (
       .i_cs(w_cs[0]),
       .i_fetch_cmd(w_fetch),
       .i_load_cmd(w_load),
-
-      .i_error_list(8'b00000000),
-      .o_debug_fifo_push(w_debug_fifo_push),
-      .o_debug_fifo_pull(w_debug_fifo_pull),
-      .o_debug_smi_test(w_debug_smi_test),
+      .o_debug_fifo_push(),
+      .o_debug_fifo_pull(),
+      .o_debug_smi_test(),
   );
 
   wire w_debug_fifo_push;
@@ -163,12 +161,12 @@ module top (
       // Digital interfaces
       .i_button(i_button),
       .i_config(i_config),
-      .o_led0  (o_led0),
-      .o_led1  (o_led1),
+      .o_led0  (/*o_led0*/),
+      .o_led1  (/*o_led1*/),
       .o_pmod  (),
 
       // Analog interfaces
-      .o_mixer_fm(o_mixer_fm),
+      .o_mixer_fm(/*o_mixer_fm*/),
       .o_rx_h_tx_l(o_rx_h_tx_l),
       .o_rx_h_tx_l_b(o_rx_h_tx_l_b),
       .o_tr_vc1(o_tr_vc1),
@@ -176,9 +174,12 @@ module top (
       .o_tr_vc2(o_tr_vc2),
       .o_shdn_tx_lna(o_shdn_tx_lna),
       .o_shdn_rx_lna(o_shdn_rx_lna),
-      .o_mixer_en(o_mixer_en)
+      .o_mixer_en(/*o_mixer_en*/)
   );
 
+  assign o_led0 = i_smi_a2;
+  assign o_led1 = i_smi_a3;
+
   //=========================================================================
   // CONBINATORIAL ASSIGNMENTS
   //=========================================================================
@@ -244,9 +245,6 @@ module top (
       .D_IN_1(w_lvds_rx_24_d1)
   );  // the 180 deg data output
 
-  // TODO!!!: w_lvds_rx_24_d1's route reports long routing. We need to put a register between it and the 
-  // Consumer: lvds_rx_24_inst
-
   // Differential 0.9GHz I/Q DDR signal
   SB_IO #(
       .PIN_TYPE   (6'b000000),        // Input only, DDR mode (sample on both pos edge and
@@ -287,6 +285,22 @@ module top (
       .D_OUT_1(w_lvds_tx_d0)
   );
 
+  /*SB_IO #(
+      .PIN_TYPE(6'b0111_01),
+  ) tx_clk_neg (
+      .PACKAGE_PIN(o_iq_tx_clk_n),
+      .OUTPUT_CLK(lvds_clock_buf),
+      .D_OUT_0(lvds_clock_buf),
+  );
+
+  SB_IO #(
+      .PIN_TYPE(6'b0101_01),
+  ) tx_clk_pos (
+      .PACKAGE_PIN(o_iq_tx_clk_p),
+      .OUTPUT_CLK(lvds_clock_buf),
+      .D_OUT_0(lvds_clock_buf),
+  );*/
+
   // Logic on a clock signal is very bad - try to use a dedicated
   // SB_IO
   assign o_iq_tx_clk_p = lvds_clock_buf;
@@ -310,7 +324,7 @@ module top (
   wire [31:0] w_rx_24_fifo_data;
 
   lvds_rx lvds_rx_09_inst (
-      .i_rst_b  (i_rst_b),
+      .i_rst_b  (1'b1/*i_rst_b*/),
       .i_ddr_clk(lvds_clock_buf),
 
       .i_ddr_data({w_lvds_rx_09_d0, w_lvds_rx_09_d1}),
@@ -325,10 +339,10 @@ module top (
   );
 
   lvds_rx lvds_rx_24_inst (
-      .i_rst_b  (i_rst_b),
+      .i_rst_b  (1'b1/*i_rst_b*/),
       .i_ddr_clk(lvds_clock_buf),
 
-      .i_ddr_data({w_lvds_rx_24_d0, w_lvds_rx_24_d1}),
+      .i_ddr_data({!w_lvds_rx_24_d0, !w_lvds_rx_24_d1}),
 
       .i_fifo_full(w_rx_fifo_full),
       .o_fifo_write_clk(w_rx_24_fifo_write_clk),
@@ -339,7 +353,7 @@ module top (
       .o_debug_state()
   );
 
-  wire w_rx_fifo_write_clk = (channel == 1'b0) ? w_rx_09_fifo_write_clk : w_rx_24_fifo_write_clk;
+  wire w_rx_fifo_write_clk = lvds_clock_buf; //(channel == 1'b0) ? w_rx_09_fifo_write_clk : w_rx_24_fifo_write_clk;
   wire w_rx_fifo_push = (channel == 1'b0) ? w_rx_09_fifo_push : w_rx_24_fifo_push;
   wire [31:0] w_rx_fifo_data = (channel == 1'b0) ? w_rx_09_fifo_data : w_rx_24_fifo_data;
   wire w_rx_fifo_pull;
@@ -348,16 +362,17 @@ module top (
   wire w_rx_fifo_empty;
   wire channel;
 
+  assign channel = i_smi_a3;
 
   complex_fifo  #(
       .ADDR_WIDTH(10),  // 1024 samples
       .DATA_WIDTH(16),  // 2x16 for I and Q 
   ) rx_fifo (
-      .wr_rst_b_i(i_rst_b),
+      .wr_rst_b_i(1'b1/*i_rst_b*/),
       .wr_clk_i(w_rx_fifo_write_clk),
       .wr_en_i(w_rx_fifo_push),
       .wr_data_i(w_rx_fifo_data),
-      .rd_rst_b_i(i_rst_b),
+      .rd_rst_b_i(1'b1/*i_rst_b*/),
       .rd_clk_i(w_clock_sys),
       .rd_en_i(w_rx_fifo_pull),
       .rd_data_o(w_rx_fifo_pulled_data),
@@ -373,9 +388,8 @@ module top (
   wire w_lvds_tx_d0;  // 0 degree
   wire w_lvds_tx_d1;  // 180 degree
   
-  
   lvds_tx lvds_tx_inst (
-      .i_rst_b(i_rst_b),
+      .i_rst_b(1'b1/*i_rst_b*/),
       .i_ddr_clk(lvds_clock_buf),
       .o_ddr_data({w_lvds_tx_d0, w_lvds_tx_d1}),
       .i_fifo_empty(w_tx_fifo_empty),
@@ -401,13 +415,13 @@ module top (
       .DATA_WIDTH(16),  // 2x16 for I and Q 
   ) tx_fifo (
       // smi clock is writing
-      .wr_rst_b_i(i_rst_b),
+      .wr_rst_b_i(1'b1/*i_rst_b*/),
       .wr_clk_i(w_tx_fifo_clock),
       .wr_en_i(w_tx_fifo_push),
       .wr_data_i(w_tx_fifo_data),
 	  
       // lvds clock is pulling (reading)
-      .rd_rst_b_i(i_rst_b),
+      .rd_rst_b_i(1'b1/*i_rst_b*/),
       .rd_clk_i(w_tx_fifo_read_clk),
       .rd_en_i(w_tx_fifo_pull),
       .rd_data_o(w_tx_fifo_pulled_data),
@@ -445,7 +459,7 @@ module top (
       .i_smi_data_in(w_smi_data_input),
       .o_smi_read_req(w_smi_read_req),
       .o_smi_write_req(w_smi_write_req),
-      .o_channel(channel),
+      .o_channel(/*channel*/),
       .i_smi_test(1'b0/*w_debug_smi_test*/),
       .o_cond_tx(),
       .o_address_error()

install.sh

@@ -1,5 +1,8 @@
 #! /bin/bash
 
+## --------------------------------------------------------------------
+## Variables
+## --------------------------------------------------------------------
 ROOT_DIR=`pwd`
 SOAPY_UTILS_EXE=SoapySDRUtil
 RED='\033[0;31m'
@@ -10,21 +13,26 @@ ERROR="0"
 
 [ $(id -u) = 0 ] && echo "Please do not run this script as root" && exit 100
 
-# update the git repo on develop_R1 branch to include sub-modules
+## --------------------------------------------------------------------
+## update the git repo on develop_R1 branch to include sub-modules
+## --------------------------------------------------------------------
 printf "\n[  1  ] ${GREEN}CaribouLite Git Repo${NC}\n"
-#git checkout develop_R1
 git pull
 git submodule init
 git submodule update
 
+## --------------------------------------------------------------------
 ## kernel module dev dependencies
+## --------------------------------------------------------------------
 printf "\n[  2  ] ${GREEN}Updating system and installing dependencies...${NC}\n"
 sudo apt-get update
 sudo apt-get -y install raspberrypi-kernel-headers module-assistant pkg-config libncurses5-dev cmake git libzmq3-dev
 sudo apt-get -y install swig avahi-daemon libavahi-client-dev python3-distutils libpython3-dev
 sudo depmod -a
 
-# clone SoapySDR dependencies
+## --------------------------------------------------------------------
+## clone SoapySDR dependencies
+## --------------------------------------------------------------------
 printf "\n[  3  ] ${GREEN}Checking Soapy SDR installation ($SOAPY_UTILS_EXE)...${NC}\n"
 
 SOAPY_UTIL_PATH=`which $SOAPY_UTILS_EXE`
@@ -80,7 +88,9 @@ else
     fi
 fi
 
+## --------------------------------------------------------------------
 ## Main Software
+## --------------------------------------------------------------------
 printf "\n[  5  ] ${GREEN}Compiling main source...${NC}\n"
 printf "${CYAN}1. External Tools...${NC}\n"
 cd $ROOT_DIR/software/utils
@@ -101,9 +111,6 @@ printf "${CYAN}3. SMI kernel module & udev...${NC}\n"
 cd $ROOT_DIR/driver
 ./install.sh
 cd ..
-cd udev
-./install.sh
-cd ..
 
 printf "${CYAN}4. Main software...${NC}\n"
 cd $ROOT_DIR
@@ -112,7 +119,9 @@ cmake $ROOT_DIR/software/libcariboulite/
 make
 sudo make install
 
-# Configuration File
+## --------------------------------------------------------------------
+## Configuration File - RPI /boot/config.txt
+## --------------------------------------------------------------------
 printf "\n[  6  ] ${GREEN}Environmental Settings...${NC}\n"
 printf "${GREEN}1. SPI configuration...  "
 DtparamSPI=`cat /boot/config.txt | grep "dtparam=spi" | xargs | cut -d\= -f1`

software/libcariboulite/src/caribou_smi/kernel/CMakeLists.txt

@@ -1,57 +0,0 @@
-cmake_minimum_required(VERSION 3.15)
-project(smi_modules VERSION 0.1.0 LANGUAGES C)
-set(CMAKE_C_STANDARD 11)
-set(CMAKE_C_STANDARD_REQUIRED ON)
-
-# Module info
-add_definitions(-D__KERNEL__ -DMODULE)
-
-# Find the kernel release
-execute_process(
-        COMMAND uname -r
-        OUTPUT_VARIABLE KERNEL_RELEASE
-        OUTPUT_STRIP_TRAILING_WHITESPACE
-)
-
-# Find the headers
-find_path(
-        KERNELHEADERS_DIR
-        include/linux/user.h
-        PATHS /usr/src/linux-headers-${KERNEL_RELEASE}
-)
-
-message(STATUS "Kernel release: ${KERNEL_RELEASE}")
-message(STATUS "Kernel headers: ${KERNELHEADERS_DIR}")
-
-function(compile_module obj)
-	set(TARGET_NAME ${obj})
-	add_custom_target(${TARGET_NAME} ALL cp -f ${CMAKE_CURRENT_SOURCE_DIR}/*.c ${CMAKE_CURRENT_SOURCE_DIR}/*.h ${CMAKE_CURRENT_BINARY_DIR}/
-		COMMAND echo "compiling module ${obj}.ko...")
-	list(LENGTH ARGN argn_len)
-	set(i 0)
-	set(depend_objlist "")
-	while(i LESS ${argn_len})  
-		list(GET ARGN ${i} argn_value)  
-		set(depend_objlist "${depend_objlist} ${argn_value}.o") 
-		math(EXPR i "${i} + 1")  
-	endwhile() 
-
-	add_custom_command(TARGET ${TARGET_NAME}
-		     POST_BUILD
-			 COMMAND cp Makefile Makefile.bak
-		     COMMAND echo "obj-m += ${obj}.o" > ${CMAKE_CURRENT_BINARY_DIR}/Makefile
-			 COMMAND echo "MY_CFLAGS += -g -DDEBUG" >> ${CMAKE_CURRENT_BINARY_DIR}/Makefile
-			 COMMAND echo "ccflags-y += -g -DDEBUG" >> ${CMAKE_CURRENT_BINARY_DIR}/Makefile
-			 COMMAND echo "CC += -g -DDEBUG" >> ${CMAKE_CURRENT_BINARY_DIR}/Makefile
-		     COMMAND echo "${obj}-objs:=${depend_objlist}" >> ${CMAKE_CURRENT_BINARY_DIR}/Makefile
-		     COMMAND make -C ${KERNELHEADERS_DIR} M=${CMAKE_CURRENT_BINARY_DIR} modules EXTRA_CFLAGS="-g"
-			 #>>NO DEBUG OPTION<<  COMMAND make -C ${KERNELHEADERS_DIR} M=${CMAKE_CURRENT_BINARY_DIR} modules
-			 COMMAND ../../../../../utils/generate_bin_blob ${obj}.ko ${obj} ../${obj}_gen.h
-			 COMMAND cp Makefile Makefile.op
-			 COMMAND cp Makefile.bak Makefile
-		     )
-endfunction()
-
-#compile_module(bcm2835_smi)
-compile_module(smi_stream_dev)
-#compile_module(bcm2835_smi_dev)

software/libcariboulite/src/caribou_smi/kernel/README.md

@@ -1,2 +1,3 @@
-# README
-TODO...
+This directory contains generated files.
+Do not edit directly.
+Editing can be done through the "[root]/driver/" directory.

software/libcariboulite/src/caribou_smi/kernel/smi_module_tester.c

@@ -1,166 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <fcntl.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <sched.h>
-#include <errno.h>
-#include <pthread.h>
-#include "../caribou_smi.h"
-#include "bcm2835_smi.h"
-
-
-#define SMI_STREAM_IOC_GET_NATIVE_BUF_SIZE		_IO(BCM2835_SMI_IOC_MAGIC, 3)
-#define SMI_STREAM_IOC_SET_NON_BLOCK_READ	 	_IO(BCM2835_SMI_IOC_MAGIC, 4)
-#define SMI_STREAM_IOC_SET_NON_BLOCK_WRITE	 	_IO(BCM2835_SMI_IOC_MAGIC, 5)
-#define SMI_STREAM_IOC_SET_STREAM_STATUS	 	_IO(BCM2835_SMI_IOC_MAGIC, 6)
-
-static void setup_settings (struct smi_settings *settings)
-{
-    settings->read_setup_time = 0;
-    settings->read_strobe_time = 5;
-    settings->read_hold_time = 0;
-    settings->read_pace_time = 0;
-    settings->write_setup_time = 0;
-    settings->write_hold_time = 0;
-    settings->write_pace_time = 0;
-    settings->write_strobe_time = 4;
-    settings->data_width = SMI_WIDTH_8BIT;
-    settings->dma_enable = 1;
-    settings->pack_data = 1;
-    settings->dma_passthrough_enable = 1;
-}
-
-pthread_t tid;
-int fd = -1;
-size_t native_batch_length_bytes = 0;
-int thread_running = 0;
-
-void* read_thread(void *arg)
-{  
-	fd_set set;
-	int rv;
-	int timeout_num_millisec = 500;
-	uint8_t *buffer = malloc(native_batch_length_bytes);
-	int size_of_buf = native_batch_length_bytes;
-
-    while (thread_running)
-	{
-		while (1)
-		{
-			struct timeval timeout = {0};
-			FD_ZERO(&set);       // clear the set mask
-			FD_SET(fd, &set);    // add our file descriptor to the set - and only it
-			int num_sec = timeout_num_millisec / 1000;
-    		timeout.tv_sec = num_sec;
-    		timeout.tv_usec = (timeout_num_millisec - num_sec*1000) * 1000;
-
-			rv = select(fd + 1, &set, NULL, NULL, &timeout);
-			if(rv == -1)
-			{
-				int error = errno;
-				switch(error)
-				{
-					case EINTR:	        // A signal was caught.
-						continue;
-
-					case EBADF:         // An invalid file descriptor was given in one of the sets. 
-										// (Perhaps a file descriptor that was already closed, or one on which an error has occurred.)
-					case EINVAL:        // nfds is negative or the value contained within timeout is invalid.
-					case ENOMEM:        // unable to allocate memory for internal tables.
-					default: goto exit;
-				};
-			}
-			else if (rv == 0)
-			{
-				printf("Read poll timeout\n");
-				break;
-			}
-			else if (FD_ISSET(fd, &set))
-			{
-				int num_read = read(fd, buffer, size_of_buf);
-				printf("Read %d bytes\n", num_read);
-				break;
-			}
-		}
-	}
-
-exit:
-	free(buffer);
-    return NULL;
-}
-
-
-int main()
-{
-	char smi_file[] = "/dev/smi";
-    struct smi_settings settings = {0};
-
-    fd = open(smi_file, O_RDWR);
-    if (fd < 0)
-    {
-        printf("can't open smi driver file '%s'\n", smi_file);
-        return -1;
-    }
-
-	// Get the current settings
-    int ret = ioctl(fd, BCM2835_SMI_IOC_GET_SETTINGS, &settings);
-    if (ret != 0)
-    {
-        printf("failed reading ioctl from smi fd (settings)\n");
-        close (fd);
-        return -1;
-    }
-
-	// apply the new settings
-    setup_settings(&settings);
-    ret = ioctl(fd, BCM2835_SMI_IOC_WRITE_SETTINGS, &settings);
-    if (ret != 0)
-    {
-        printf("failed writing ioctl to the smi fd (settings)\n");
-        close (fd);
-        return -1;
-    }
-
-	// set the address to idle
-    ret = ioctl(fd, BCM2835_SMI_IOC_ADDRESS, caribou_smi_address_idle);
-    if (ret != 0)
-    {
-        printf("failed setting smi address (idle / %d) to device\n", caribou_smi_address_idle);
-        close (fd);
-        return -1;
-    }
-
-	// get the native batch length in bytes
-	ret = ioctl(fd, SMI_STREAM_IOC_GET_NATIVE_BUF_SIZE, &native_batch_length_bytes);
-    if (ret != 0)
-    {
-        printf("failed reading native batch length, setting default\n");
-		native_batch_length_bytes = (1024)*(1024)/2;
-    }
-	printf("Native batch size: %u\n", native_batch_length_bytes);
-
-	// start streaming data
-	ret = ioctl(fd, SMI_STREAM_IOC_SET_STREAM_STATUS, 1);
-
-	// start the reader thread
-	thread_running = 1;
-	int err = pthread_create(&tid, NULL, &read_thread, NULL);
-	if (err != 0)
-	{
-		printf("\ncan't create thread :[%s]", strerror(err));
-	}
-
-	getchar();
-	thread_running = 0;
-
-	pthread_join(tid, NULL);
-
-	ret = ioctl(fd, SMI_STREAM_IOC_SET_STREAM_STATUS, 0);
-
-	close (fd);
-    return 0;
-}