Thanks Chuck, I am still trying to get the Blackmagic Probe firmware running. I
did get the usb_cdcacm example running on my hardware so at least I know that
is good. In getting that example to work I was using the latest libopencm3
commit so I am now trying to get the probe working again. I can’t imagine the
clock selection difference is significant but I thought I should eliminate it.
Sid
Sid Price
Desktop Application and Embedded System Design
From: Chuck McManis [mailto:chuck.mcma...@gmail.com]
Sent: Friday, January 27, 2017 3:16 PM
To: Sid Price <sidpr...@softtools.com>
Cc: libopencm3-devel@lists.sourceforge.net
Subject: Re: [libopencm3-devel] Newbie clock questions
Hi Sid,
There aren't too many differences other than the old one takes a bit mask and
pointer to a register and the new one just takes an enum. The old one required
you to know which RCC enable register you had to set the bits in but it also
let you set multiple bits at the same time in the same register, the new one
encodes the register it needs in the enum but you can only set one at a time.
In general the new one is easier, and certainly requires fewer (if any)
referring to the docs to get 'right'. RCC_peripheralname is the enum value to
enable so RCC_GPIOA is GPIOA and RCC_SPI2 is the second SPI port.
--Chuck
On Fri, Jan 27, 2017 at 1:34 PM, Sid Price <sidpr...@softtools.com
<mailto:sidpr...@softtools.com> > wrote:
I am building a USB device based upon STM32F411RE, the source code uses an
older version of libopencm3. It uses the old-style peripheral clock enables,
e.g. rcc_peripheral_enable_clock and I would like to update it to use the newer
“rcc_periph_clock_enable” method. Are there some notes anywhere about how to do
this, since I am very new to libopencm3 and don’t fully understand the
differences?
Thanks
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