diff --git a/src/ice40.cpp b/src/ice40.cpp
index 4f93412..dc3cb07 100644
--- a/src/ice40.cpp
+++ b/src/ice40.cpp
@@ -26,6 +26,7 @@
 #include "display.hpp"
 #include "ftdispi.hpp"
 #include "device.hpp"
+#include "progressBar.hpp"
 #include "rawParser.hpp"
 #include "spiFlash.hpp"
 
@@ -78,6 +79,9 @@ void Ice40::program(unsigned int offset)
 		return;
 	}
 
+	uint8_t *data = bit.getData();
+	int length = bit.getLength() / 8;
+
 	_spi->gpio_clear(_rst_pin);
 
 	SPIFlash flash(reinterpret_cast<SPIInterface *>(_spi), _quiet);
@@ -86,10 +90,32 @@ void Ice40::program(unsigned int offset)
 
 	printf("%02x\n", flash.read_status_reg());
 	flash.read_id();
-	flash.erase_and_prog(offset, bit.getData(), bit.getLength() / 8);
+	flash.erase_and_prog(offset, data, length);
 
-	if (_verify)
-		printWarn("writing verification not supported");
+	if (_verify) {
+		printInfo("Verifying write");
+		std::string verify_data;
+		verify_data.resize(length);
+		printInfo("Read flash ", false);
+		if (0 != flash.read(offset, (uint8_t*)&verify_data[0], length)) {
+			printError("FAIL");
+			return;
+		} else {
+			printSuccess("DONE");
+		}
+
+		ProgressBar progress("Check", length, 50, _quiet);
+		for (int i = 0; i < length; i++) {
+			if ((uint8_t)verify_data[i] != data[i]) {
+				progress.fail();
+				printError("Verification failed at " +
+						std::to_string(offset + i));
+				return;
+			}
+			progress.display(i);
+		}
+		progress.done();
+	}
 
 	_spi->gpio_set(_rst_pin);
 	usleep(12000);
@@ -104,3 +130,56 @@ void Ice40::program(unsigned int offset)
 	else
 		printSuccess("DONE");
 }
+
+bool Ice40::dumpFlash(const std::string &filename,
+		uint32_t base_addr, uint32_t len)
+{
+	uint32_t timeout = 1000;
+	_spi->gpio_clear(_rst_pin);
+
+	std::string data;
+	data.resize(len);
+
+	/* prepare SPI access */
+	printInfo("Read Flash ", false);
+	try {
+		SPIFlash flash(reinterpret_cast<SPIInterface *>(_spi), _verbose);
+		flash.reset();
+		flash.power_up();
+		flash.read_id();
+		flash.read_status_reg();
+		flash.read(base_addr, (uint8_t*)&data[0], len);
+	} catch (std::exception &e) {
+		printError("Fail");
+		printError(std::string(e.what()));
+		return false;
+	}
+
+	FILE *fd = fopen(filename.c_str(), "wb");
+	if (!fd) {
+		printError("Fail");
+		return false;
+	}
+
+	fwrite(data.c_str(), sizeof(uint8_t), len, fd);
+	fclose(fd);
+
+	printSuccess("Done");
+
+	/* prepare SPI access */
+
+	_spi->gpio_set(_rst_pin);
+	usleep(12000);
+
+	printInfo("Wait for CDONE ", false);
+	do {
+		timeout--;
+		usleep(12000);
+	} while (((_spi->gpio_get(true) & _done_pin) == 0) && timeout > 0);
+	if (timeout == 0)
+		printError("FAIL");
+	else
+		printSuccess("DONE");
+
+	return false;
+}
diff --git a/src/ice40.hpp b/src/ice40.hpp
index 8fdcaae..b02ee57 100644
--- a/src/ice40.hpp
+++ b/src/ice40.hpp
@@ -32,6 +32,8 @@ class Ice40: public Device {
 		~Ice40();
 
 		void program(unsigned int offset = 0) override;
+		bool dumpFlash(const std::string &filename,
+			uint32_t base_addr, uint32_t len);
 		/* not supported in SPI Active mode */
 		int idCode() override {return 0;}
 		void reset() override;
diff --git a/src/main.cpp b/src/main.cpp
index ac6c7bc..a06de85 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -194,7 +194,15 @@ int main(int argc, char **argv)
 		} else if (board->manufacturer == "lattice") {
 			Ice40 target(spi, args.bit_file, args.file_type,
 				board->reset_pin, board->done_pin, args.verify, args.verbose);
-			target.program(args.offset);
+			if (args.prg_type == Device::RD_FLASH) {
+				if (args.file_size == 0) {
+					printError("Error: 0 size for dump");
+				} else {
+					target.dumpFlash(args.bit_file, args.offset, args.file_size);
+				}
+			} else {
+				target.program(args.offset);
+			}
 		} else {
 			RawParser *bit = NULL;
 			if (board->reset_pin) {