Usb serial (#1648)

* enabled usb clock
* added usb stack to application
* fixed pll0usb clock setup
* implemented serial usb handshake
* implemented serial communication
* integrated chibios shell
* implemented device reset
* implemented enter dfu mode
* implemented hackrf mode command
* implemented flash command
* implemented memory manipulation
* implemented button control
* fixed mode change
* improved reset behavior
* implemented directory commands
* implemented file commands
* improved data communication
* refactorings

firmware/baseband/proc_flash_utility.cpp

@@ -58,6 +58,8 @@ int main() {
 
     f_close(&firmware_file);
 
+    LPC_RGU->RESET_CTRL[0] = (1 << 0);
+
     while (1)
         __WFE();
 

firmware/baseband/sd_over_usb/scsi.c

@@ -22,6 +22,9 @@
 
 #include "scsi.h"
 #include "diskio.h"
+#include <libopencm3/lpc43xx/scu.h>
+#include <libopencm3/lpc43xx/rgu.h>
+#include <libopencm3/lpc43xx/wwdt.h>
 
 volatile bool usb_bulk_block_done = false;
 
@@ -281,6 +284,17 @@ void scsi_command(msd_cbw_t* msd_cbw_data) {
         case SCSI_CMD_VERIFY_10:
             status = 0;
             break;
+
+        case SCSI_CMD_START_STOP_UNIT:
+            SCU_SFSP2_8 = (SCU_SFSP2_8 & ~(7)) | 4;
+            struct gpio_t dfu = GPIO(5, 7);
+            gpio_output(&dfu);
+            gpio_clear(&dfu);
+
+            delay(50 * 40800);
+
+            RESET_CTRL0 = (1 << 0);
+            break;
     }
 
     usb_send_csw(msd_cbw_data, status);

firmware/baseband/sd_over_usb/sd_over_usb.c

@@ -36,7 +36,7 @@ usb_request_status_t report_max_lun(
             1,
             NULL,
             NULL);
-
+    } else if (stage == USB_TRANSFER_STAGE_DATA) {
         usb_transfer_schedule_ack(endpoint->out);
 
         scsi_running = true;