diff options
Diffstat (limited to 'ao_usb.c')
| -rw-r--r-- | ao_usb.c | 33 |
1 files changed, 22 insertions, 11 deletions
@@ -23,7 +23,20 @@ struct ao_task __xdata ao_usb_task; static __xdata uint16_t ao_usb_in_bytes; static __xdata uint16_t ao_usb_out_bytes; static __xdata uint8_t ao_usb_iif; -static __xdata uint8_t ao_usb_oif; +static __xdata uint8_t ao_usb_running; + +static void +ao_usb_set_interrupts(void) +{ + /* IN interrupts on the control an IN endpoints */ + USBIIE = (1 << AO_USB_CONTROL_EP) | (1 << AO_USB_IN_EP); + + /* OUT interrupts on the OUT endpoint */ + USBOIE = (1 << AO_USB_OUT_EP); + + /* Only care about reset */ + USBCIE = USBCIE_RSTIE; +} /* This interrupt is shared with port 2, * so when we hook that up, fix this @@ -38,9 +51,11 @@ ao_usb_isr(void) interrupt 6 if (ao_usb_iif & (1 << AO_USB_IN_EP)) ao_wakeup(&ao_usb_in_bytes); - ao_usb_oif |= USBOIF; - if (ao_usb_oif & (1 << AO_USB_OUT_EP)) + if (USBOIF & (1 << AO_USB_OUT_EP)) ao_wakeup(&ao_usb_out_bytes); + + if (USBCIF & USBCIF_RSTIF) + ao_usb_set_interrupts(); } struct ao_usb_setup { @@ -136,6 +151,7 @@ ao_usb_ep0_queue_byte(uint8_t a) void ao_usb_set_address(uint8_t address) { + ao_usb_running = 1; USBADDR = address | 0x80; while (USBADDR & 0x80) ; @@ -318,6 +334,8 @@ ao_usb_flush(void) __critical void ao_usb_putchar(char c) __critical { + if (!ao_usb_running) + return; for (;;) { USBINDEX = AO_USB_IN_EP; if ((USBCSIL & USBCSIL_INPKT_RDY) == 0) @@ -362,15 +380,8 @@ ao_usb_enable(void) ao_usb_set_configuration(); - /* IN interrupts on the control an IN endpoints */ - USBIIE = (1 << AO_USB_CONTROL_EP) | (1 << AO_USB_IN_EP); + ao_usb_set_interrupts(); - /* OUT interrupts on the OUT endpoint */ - USBOIE = (1 << AO_USB_OUT_EP); - - /* Ignore control interrupts */ - USBCIE = 0; - /* enable USB interrupts */ IEN2 |= IEN2_USBIE; |