Feature/nbfm rx

driver/smi_stream_ioctl.h

@@ -0,0 +1,25 @@
+
+#ifndef __SMI_STREAM_IOCTL_H__
+#define __SMI_STREAM_IOCTL_H__
+
+#ifdef __KERNEL__
+    #include <linux/types.h>   // u32, etc.
+#else
+    #include <stdint.h>        // uint32_t
+#endif
+
+// Unique magic number for our ioctl calls (arbitrary, must be unique)
+#define SMI_STREAM_IOCTL_MAGIC 's'
+
+// IOCTL command to read all key SMI registers
+#define SMI_IOCTL_READ_REGS _IOR(SMI_STREAM_IOCTL_MAGIC, 0x01, struct smi_registers_t)
+
+// Struct to carry SMI register values between kernel and user space
+struct smi_registers_t {
+    uint32_t smics;    // Control and Status
+    uint32_t smil;     // Length
+    uint32_t smids;    // DMA status
+    uint32_t smisw0;   // Write register 0
+};
+
+#endif // __SMI_STREAM_IOCTL_H__

examples/python/soapy_rf_sweep_generator.py

@@ -77,7 +77,7 @@ def setup_freq_power(sdr, stream, freq_KHz, power=10.0):
 	sdr.setGain(SOAPY_SDR_TX, 0, power+10)
 
 def setup_transmitter(sdr, freq_KHz=2304100):
-	stream = sdr.setupStream(SOAPY_SDR_TX, SOAPY_SDR_CS16, [0], dict(CW="1"))
+	stream = sdr.setupStream(SOAPY_SDR_TX, SOAPY_SDR_CS16, [0])
 	setup_freq_power(sdr, stream, freq_KHz)
 	return stream
 
@@ -115,7 +115,7 @@ def main():
 
 		#---------------------------------------------
 		if (event == "Exit" or event == WIN_CLOSED):
-			break;
+			break
 
 		#---------------------------------------------
 		elif event == "Set Power":

firmware/Makefile

@@ -6,7 +6,7 @@ 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 --parallel-refine --opt-timing --seed 16 --timing-allow-fail
+	nextpnr-ice40 --lp1k --package qn84 --json $(filename).json --pcf $(pcf_file) --asc $(filename).asc --parallel-refine --opt-timing --seed 16 --timing-allow-fail --no-promote-globals --report nextpnr_timing.json 2>&1 | tee nextpnr.log
 	icepack $(filename).asc $(filename).bin
 
 build: top.bin

firmware/complex_fifo.v

@@ -14,7 +14,7 @@ module complex_fifo #(
 	output reg [2*DATA_WIDTH-1:0]	rd_data_o,
 
 	output reg 						full_o,
-	output reg 						empty_o,
+	output reg 						empty_o
 );
 
 	reg [ADDR_WIDTH-1:0]	wr_addr;

firmware/io_ctrl.v

@@ -15,7 +15,7 @@ module io_ctrl
 	input [3:0]         i_config,
 	output              o_led0,
 	output              o_led1,
-	output [3:0]        o_pmod,
+	//output [3:0]        o_pmod,
 
 	// Analog interfaces
 	output              o_mixer_fm,
@@ -91,7 +91,7 @@ module io_ctrl
     //=========================================================================
     assign o_led0 = led0_state;
     assign o_led1 = led1_state;
-    assign o_pmod = pmod_state;
+    //assign o_pmod = pmod_state;
 
     // Analog interfaces
     assign o_mixer_fm = 1'b0;
@@ -113,7 +113,7 @@ module io_ctrl
         if (i_rst_b == 1'b0) begin
             debug_mode <= debug_mode_none;
             rf_mode <= rf_mode_low_power;
-            led0_state <= 1'b0;
+            led0_state <= 1'b0; // a marker, to show it is my version of the firmware
             led1_state <= 1'b0;
         end else begin
             if (i_cs == 1'b1) begin
@@ -307,4 +307,4 @@ module io_ctrl
         end
     end
 
-endmodule // io_ctrl
+endmodule // io_ctrl