diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lpc176x/usbserial.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/lpc176x/usbserial.c b/src/lpc176x/usbserial.c index d6db8565..847746d8 100644 --- a/src/lpc176x/usbserial.c +++ b/src/lpc176x/usbserial.c @@ -8,6 +8,7 @@ #include "LPC17xx.h" // LPC_SC #include "autoconf.h" // CONFIG_SMOOTHIEWARE_BOOTLOADER #include "board/irq.h" // irq_disable +#include "board/misc.h" // timer_read_time #include "byteorder.h" // cpu_to_le32 #include "command.h" // output #include "generic/usb_cdc.h" // usb_notify_ep0 @@ -248,9 +249,14 @@ usb_request_bootloader(void) { if (!CONFIG_SMOOTHIEWARE_BOOTLOADER) return; + // Disable USB and pause for 5ms so host recognizes a disconnect + irq_disable(); + sie_cmd_write(SIE_CMD_SET_DEVICE_STATUS, 0); + uint32_t end = timer_read_time() + timer_from_us(5000); + while (timer_is_before(timer_read_time(), end)) + ; // The "LPC17xx-DFU-Bootloader" will enter the bootloader if the // watchdog timeout flag is set. - irq_disable(); LPC_WDT->WDMOD = 0x07; NVIC_SystemReset(); } |