Search found 31 matches

by Dylan Hsieh
06 Aug 2019, 14:40
Forum: Nuvoton Cortex-M4 MCU
Topic: Could M483 disable VBUS function?
Replies: 3
Views: 597

Re: Could M483 disable VBUS function?

Hi,

1, we connect the HSUSB_VBUS to 5V directly
It's OK.

2, use external 24M HXT source
The M480 HSUSB clock source can only come from 12M HXT

Please repleace the HXT from 24M to 12M then download the simplest example [HSUSBD_HID_Mouse] in M480 BSP to check the hardware is fine first.

Thanks
by Dylan Hsieh
06 Aug 2019, 14:26
Forum: Nuvoton Cortex-M4 MCU
Topic: how to decide M483 HSUSB descriptors
Replies: 2
Views: 547

Re: how to decide M483 HSUSB descriptors

Hi,

The examples in the M480 BSP are suitable for all the part of M480 series.
Could you please download the simplest example such likes "HSUSBD_HID_Mouse" in the M480 BSP first to check the haredware which you used is work.

Thanks
by Dylan Hsieh
10 Jun 2019, 10:27
Forum: Nuvoton Cortex-M4 MCU
Topic: HSUSB ISO TXPKIF strange behavior
Replies: 2
Views: 3111

Re: HSUSB ISO TXPKIF strange behavior

HI vsf,

Could you show us the USB packet during transmission, without that I have no idea what's USB going on.

Thanks
by Dylan Hsieh
10 Jun 2019, 10:13
Forum: Nuvoton Cortex-M4 MCU
Topic: How to configure for external HXT source?
Replies: 2
Views: 2352

Re: How to configure for external HXT source?

Hi David, Please enable the CKO (clock output) function to check the HXT is fine or not. We have a sample code which shows how to use the external clock as HXT clock source, but the readme file is written by Chinese: https://www.nuvoton.com/hq/resource-download.jsp?tp_GUID=EC0120171219135320 Thanks
by Dylan Hsieh
19 Mar 2019, 11:08
Forum: Nuvoton Cortex-M4 MCU
Topic: HsUSBD Fly-Mode packetizing size control
Replies: 1
Views: 20925

Re: HsUSBD Fly-Mode packetizing size control

Hi Kojima-san, The fly-mode only care how many data in the endpoint buffer, if the data in the EP buffer is less than maximum packet size, the HS-USBD will send all of data in A package after receive the in-token from HOST. But if data is more than the maximum packet size, the data will be divided i...
by Dylan Hsieh
15 Feb 2019, 16:07
Forum: NuMaker Resources
Topic: How to activate ETM on M48x ?
Replies: 2
Views: 52874

Re: How to activate ETM on M48x ?

Hi, To enable the ETM trace function, you need to add some code to switch the pin's multi-function to ETM trace pin at the initial state: /* Setup ETM Pin Usage - PE.8: DAT3 - PE.9: DAT2 - PE.10: DAT1 - PE.11: DAT0 - PE.12: CLK */ SYS->GPE_MFPH &= ~(SYS_GPE_MFPH_PE8MFP_Msk | SYS_GPE_MFPH_PE9MFP_Msk ...
by Dylan Hsieh
15 Feb 2019, 15:22
Forum: Nuvoton Cortex-M4 MCU
Topic: HsUSBD Proper Read-out method for Bulk-OUT EPs
Replies: 9
Views: 20698

Re: HsUSBD Proper Read-out method for Bulk-OUT EPs

Hi Kojima-san, [Checking emptiness] _BUFEMPTYIF is just a status flag indicate that do endpoint buffer have data or not. If endpoint buffer have unread data inside it will keep "0", even there is only 1 byte unread data inside endpoint buffer. [Memory space management done by USBD IP] If the endpoin...
by Dylan Hsieh
12 Feb 2019, 14:23
Forum: Nuvoton Cortex-M4 MCU
Topic: HsUSBD Proper Read-out method for Bulk-OUT EPs
Replies: 9
Views: 20698

Re: HsUSBD Proper Read-out method for Bulk-OUT EPs

Hi Kojima-san The _DATCNT always indicate how many data in the endpoint buffer, and it will decrease by "1" each time you read-out (byte accessed) the data from the endpoint buffer. And the endpoint buffer is work likes "Ring Buffer", if it have enough space to stored "A data package", the USB hardw...
by Dylan Hsieh
11 Feb 2019, 16:30
Forum: Nuvoton Cortex-M4 MCU
Topic: HsUSBD Proper Read-out method for Bulk-OUT EPs
Replies: 9
Views: 20698

Re: HsUSBD Proper Read-out method for Bulk-OUT EPs

Hi Kojima-san, Allow me to simplify your question: You want to operate the endpoint buffer likes the "double-buffer", allocates double packet size for a endpoint (BUF1, BUF2), the first package from HOST will be stored into BUF1, the next package will be stored into BUF2, so you can handle the previ...