diff options
| author | Scott Shawcroft <[email protected]> | 2018-11-14 09:46:46 -0800 |
|---|---|---|
| committer | Scott Shawcroft <[email protected]> | 2018-11-23 11:15:39 -0800 |
| commit | 6aa0146c72fec825fcd55584bc9088cbd30fadec (patch) | |
| tree | cd8e3ea636992678ccc99182e60cff18b4681d70 /src | |
| parent | a1c596490aa40863cd5f1e36a821157ffeab2af6 (diff) | |
Reset USB peripheral and wait for startup
Diffstat (limited to 'src')
| -rw-r--r-- | src/portable/microchip/samd21/dcd_samd21.c | 11 | ||||
| -rw-r--r-- | src/portable/microchip/samd51/dcd_samd51.c | 10 |
2 files changed, 19 insertions, 2 deletions
diff --git a/src/portable/microchip/samd21/dcd_samd21.c b/src/portable/microchip/samd21/dcd_samd21.c index c6101f312..93425b63c 100644 --- a/src/portable/microchip/samd21/dcd_samd21.c +++ b/src/portable/microchip/samd21/dcd_samd21.c @@ -71,10 +71,19 @@ static void bus_reset(void) { *------------------------------------------------------------------*/ bool dcd_init (uint8_t rhport) { + // Reset to get in a clean state. + USB->DEVICE.CTRLA.bit.SWRST = true; + while (USB->DEVICE.SYNCBUSY.bit.SWRST == 0) { + + } + while (USB->DEVICE.SYNCBUSY.bit.SWRST == 1) {} + (void) rhport; USB->DEVICE.DESCADD.reg = (uint32_t) &sram_registers; USB->DEVICE.CTRLB.reg = USB_DEVICE_CTRLB_SPDCONF_FS; - USB->DEVICE.CTRLA.reg = USB_CTRLA_MODE_DEVICE | USB_CTRLA_ENABLE; + USB->DEVICE.CTRLA.reg = USB_CTRLA_MODE_DEVICE | USB_CTRLA_ENABLE | USB_CTRLA_RUNSTDBY; + while (USB->DEVICE.SYNCBUSY.bit.ENABLE == 1) {} + USB->DEVICE.INTENSET.reg = USB_DEVICE_INTENSET_SOF | USB_DEVICE_INTENSET_EORST; return true; diff --git a/src/portable/microchip/samd51/dcd_samd51.c b/src/portable/microchip/samd51/dcd_samd51.c index 6e8053e59..705e06e61 100644 --- a/src/portable/microchip/samd51/dcd_samd51.c +++ b/src/portable/microchip/samd51/dcd_samd51.c @@ -72,9 +72,17 @@ static void bus_reset(void) { bool dcd_init (uint8_t rhport) { (void) rhport; + // Reset to get in a clean state. + USB->DEVICE.CTRLA.bit.SWRST = true; + while (USB->DEVICE.SYNCBUSY.bit.SWRST == 0) { + + } + while (USB->DEVICE.SYNCBUSY.bit.SWRST == 1) {} + USB->DEVICE.DESCADD.reg = (uint32_t) &sram_registers; USB->DEVICE.CTRLB.reg = USB_DEVICE_CTRLB_SPDCONF_FS; - USB->DEVICE.CTRLA.reg = USB_CTRLA_MODE_DEVICE | USB_CTRLA_ENABLE; + USB->DEVICE.CTRLA.reg = USB_CTRLA_MODE_DEVICE | USB_CTRLA_ENABLE | USB_CTRLA_RUNSTDBY; + while (USB->DEVICE.SYNCBUSY.bit.ENABLE == 1) {} USB->DEVICE.INTENSET.reg = USB_DEVICE_INTENSET_SOF | USB_DEVICE_INTENSET_EORST; return true; |