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CH341: Use 923077 baud 

Signed-off-by: Tormod Volden <debian.tormod@gmail.com>
This commit is contained in:
Tormod Volden 2024-03-16 10:05:58 +01:00
parent 3d95a5806e
commit a1f64d8008
1 changed files with 7 additions and 0 deletions
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7
system/usbhcd.c
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@ -301,6 +301,7 @@ static bool configure_keyboard(const usb_hcd_t *hcd, const usb_ep_t *ep0, int in
}
#define CH341_REQ_SERIAL_INIT 0xA1
#define CH341_REQ_WRITE_REG 0x9A
static bool configure_ch341(const usb_hcd_t *hcd, const usb_ep_t *ep0)
{
@ -312,6 +313,12 @@ static bool configure_ch341(const usb_hcd_t *hcd, const usb_ep_t *ep0)
return false;
}
// div/prescale F3 07 gives 923077 baud, set bit 7 for non-buffered
build_setup_packet(&setup_pkt, USB_REQ_TO_DEVICE | USB_REQ_VENDOR, CH341_REQ_WRITE_REG, 0x1312, 0xf387, 0);
if (!hcd->methods->setup_request(hcd, ep0, &setup_pkt)) {
return false;
}
return true;
}