BluePill - Revision history

Kc at 20:15, 25 January 2025

2025-01-25T20:15:11Z

← Older revision		Revision as of 13:15, 25 January 2025
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	[[File:BluePill pinout.png\|frameless\|501x501px]]		[[File:BluePill pinout.png\|frameless\|501x501px]]

			== Specifications ==

	The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price.		The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price.

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	The digital I/O pins are 5V tolerant so long as you don't use the internal pullups. The analog ADC is, of course, not 5V tolerant. Best just stick to 3v3 for everything if you can.		The digital I/O pins are 5V tolerant so long as you don't use the internal pullups. The analog ADC is, of course, not 5V tolerant. Best just stick to 3v3 for everything if you can.

	~~'''To flash:'''~~		== Flashing ==

	The USB port is basically useless.		The USB port is basically useless.

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	''The program will execute immediately upon uploading, but not upon reset until you set the "boot" jumper back to 0.''		''The program will execute immediately upon uploading, but not upon reset until you set the "boot" jumper back to 0.''

	'''PlatformIO Configuration:'''		=== '''PlatformIO Configuration''' ===

	''platform: ststm32; board: bluepill_f103c8; framework: arduino''		''platform: ststm32; board: bluepill_f103c8; framework: arduino''

			'''platformio.ini''' settings using arduino framework and TTL Serial Upload:<syntaxhighlight lang="ini">
			[env:bluepill_f103c8]
			platform = ststm32
			board = bluepill_f103c8
			framework = arduino
			upload_protocol = serial
			upload_port = /dev/ttyUSB0 # correct as needed
			</syntaxhighlight>

			== '''GPIOs''' ==
	~~'''platformio.ini''' settings using arduino framework and TTL Serial Upload:<blockquote><code>[env:bluepill_f103c8]</code>~~

	~~<code>platform~~ = ~~ststm32</code>~~

	~~<code>board~~ = ~~bluepill_f103c8</code>~~

	~~<code>framework = arduino</code>~~

	~~<code>upload_protocol = serial</code>~~

	~~<code>upload_port = /dev/ttyUSB0 # correct as needed</code></blockquote>~~

	'''~~The 37~~ GPIOs:'''

	PA0 - PA15, PB0 - PB15, PC13 - PC15.		PA0 - PA15, PB0 - PB15, PC13 - PC15.

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	[https://www.electronicshub.org/working-with-interrupts-in-stm32f103c8t6/ Good reference on interrupts on the STM32F103C8T6]		[https://www.electronicshub.org/working-with-interrupts-in-stm32f103c8t6/ Good reference on interrupts on the STM32F103C8T6]

	'''Analog (0-~~3.3v~~) ~~measurement:~~'''		=== '''Analog Measurement (0-3v3)''' ===

	The 10 analog input pins are '''12-bit''' resolution (0-4096 int).		The 10 analog input pins are '''12-bit''' resolution (0-4096 int).

	Analog inputs: PA0 - PA7, PB0, PB1		Analog inputs: PA0 - PA7, PB0, PB1

			=== '''PWM Output''' ===

	'''PWM Output:'''

	There are 15 PWM outputs total.		There are 15 PWM outputs total.

	PA0 - PA3, PA6 - PA10, PB0 - PB1, PB6 - PB9		PA0 - PA3, PA6 - PA10, PB0 - PB1, PB6 - PB9

			''!! First set the PWM settings for the chip in your setup():''<syntaxhighlight lang="c">
			analogWriteResolution(8); # of bits of PWM resolution, max 16 bits
	''!! First set the PWM settings for the chip in your setup():''		analogWriteFrequency(1000); # PWM frequency in Hz, max unknown
			</syntaxhighlight>Then you can use <code>analogWrite(PIN, VALUE)</code> as per usual.
	<~~code~~>analogWriteResolution(8); # of bits of PWM resolution, max 16 bits~~</code>~~

	~~<code>~~analogWriteFrequency(1000); # PWM frequency in Hz, max unknown</~~code~~>



	Then you can use <code>analogWrite(PIN, VALUE)</code> as per usual.

	''N.B.: If you want to drive a PWM output from an analog reading, you can just set the analogWriteResolution to 12 and then you don't have to map the values!''		''N.B.: If you want to drive a PWM output from an analog reading, you can just set the analogWriteResolution to 12 and then you don't have to map the values!''

			=== Miscellaneous ===

	~~'''Misc:'''~~

	The user-definable LED on the board is sink-ground through PC13. Set PC13 LOW to turn it on. '''Note: PC13 is not a PWM output.'''		The user-definable LED on the board is sink-ground through PC13. Set PC13 LOW to turn it on. '''Note: PC13 is not a PWM output.'''

Kc: Added datasheet

2023-11-05T23:21:13Z

Added datasheet

← Older revision		Revision as of 16:21, 5 November 2023
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	The BluePill is an inexpensive Arduino style microcontroller board built around the STMicroelectronics ARM Cortex-M3 STM32F103CT6 microcontroller.		The BluePill is an inexpensive Arduino style microcontroller board built around the STMicroelectronics ARM Cortex-M3 [https://www.st.com/resource/en/datasheet/stm32f103rc.pdf STM32F103CT6] microcontroller.

	[[File:BluePill pinout.png\|frameless\|501x501px]]		[[File:BluePill pinout.png\|frameless\|501x501px]]

Kc at 23:19, 5 November 2023

2023-11-05T23:19:31Z

← Older revision		Revision as of 16:19, 5 November 2023
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	The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price.		The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price.

			VBAT/5V can accept from 3 - 5VDC.

			3V3 pins can alternatively be used to power the chip directly (nothing on the board requires 5V)
	~~VBAT can accept from 3 - 5VDC.~~

	3V3 pins can alternatively be used to power the chip directly.

	VBAT is not connected directly to USB P+. '''Do not power it from one of the pins and from the USB port at the same time.'''		VBAT is not connected directly to USB P+. '''Do not power it from one of the pins and from the USB port at the same time.'''

			The digital I/O pins are 5V tolerant so long as you don't use the internal pullups. The analog ADC is, of course, not 5V tolerant. Best just stick to 3v3 for everything if you can.

	'''To flash:'''		'''To flash:'''
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	The USB port is basically useless.		The USB port is basically useless.

	- Connect a TTL-Serial adapter connected to UART1 (Pins PA9 & PA10 above, A9 A10 on the silkscreen).		* Connect a TTL-Serial adapter connected to UART1 (Pins PA9 & PA10 above, A9 A10 on the silkscreen).
			* Set the "boot" jumper (top) to 1 (rightmost position).
	- Set the "boot" jumper (top) to 1 (rightmost position).		* Press the [RESET] button
			* Start your upload
	- Press the [RESET] button

	- Start your upload

	''The program will execute immediately upon uploading, but not upon reset until you set the "boot" jumper back to 0.''		''The program will execute immediately upon uploading, but not upon reset until you set the "boot" jumper back to 0.''



	'''PlatformIO Configuration:'''		'''PlatformIO Configuration:'''
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	'''platformio.ini''' settings using arduino framework and TTL Serial Upload:		'''platformio.ini''' settings using arduino framework and TTL Serial Upload:<blockquote><code>[env:bluepill_f103c8]</code>

	<code>[env:bluepill_f103c8]</code>

	<code>platform = ststm32</code>		<code>platform = ststm32</code>
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	<code>upload_protocol = serial</code>		<code>upload_protocol = serial</code>

	<code>upload_port = /dev/ttyUSB0 # correct as needed</code>		<code>upload_port = /dev/ttyUSB0 # correct as needed</code></blockquote>

			'''The 37 GPIOs:'''

			PA0 - PA15, PB0 - PB15, PC13 - PC15.

			The Arduino library references them directly by name (e.g. PA0).

			Any IO pin can be an interrupt driver, and there are '''16''' external interrupts configurable.

			[https://www.electronicshub.org/working-with-interrupts-in-stm32f103c8t6/ Good reference on interrupts on the STM32F103C8T6]

	'''Analog (0-3.3v) measurement:'''		'''Analog (0-3.3v) measurement:'''

	The 10 analog input pins are 12-bit resolution.		The 10 analog input pins are '''12-bit''' resolution (0-4096 int).

	Analog inputs: PA0 - PA7, PB0, PB1		Analog inputs: PA0 - PA7, PB0, PB1



	'''PWM Output:'''		'''PWM Output:'''

	There are 15 PWM ~~pins~~ total.		There are 15 PWM outputs total.

	PA0 - PA3, PA6 - PA10, PB0 - PB1, PB6 - PB9		PA0 - PA3, PA6 - PA10, PB0 - PB1, PB6 - PB9



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	<code>analogWriteFrequency(1000); # PWM frequency in Hz, max unknown</code>		<code>analogWriteFrequency(1000); # PWM frequency in Hz, max unknown</code>



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	''N.B.: If you want to drive a PWM output from an analog reading, you can just set the analogWriteResolution to 12 and then you don't have to map the values!''		''N.B.: If you want to drive a PWM output from an analog reading, you can just set the analogWriteResolution to 12 and then you don't have to map the values!''

Kc at 23:10, 5 November 2023

2023-11-05T23:10:15Z

← Older revision		Revision as of 16:10, 5 November 2023
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	[[File:BluePill pinout.png\|frameless\|501x501px]]		[[File:BluePill pinout.png\|frameless\|501x501px]]



	The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price.		The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price.



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	VBAT is not connected directly to USB P+. '''Do not power it from one of the pins and from the USB port at the same time.'''		VBAT is not connected directly to USB P+. '''Do not power it from one of the pins and from the USB port at the same time.'''



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	''The program will execute immediately upon uploading, but not upon reset until you set the "boot" jumper back to 0.''		''The program will execute immediately upon uploading, but not upon reset until you set the "boot" jumper back to 0.''



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	''platform: ststm32; board: bluepill_f103c8; framework: arduino''		''platform: ststm32; board: bluepill_f103c8; framework: arduino''



	'''platformio.ini''' settings using arduino framework and TTL Serial Upload:		'''platformio.ini''' settings using arduino framework and TTL Serial Upload:

	<code>		<code>[env:bluepill_f103c8]</code>
	[env:bluepill_f103c8]
	platform = ststm32		<code>platform = ststm32</code>
	board = bluepill_f103c8
	framework = arduino		<code>board = bluepill_f103c8</code>
	upload_protocol = serial
	upload_port = /dev/ttyUSB0		<code>framework = arduino</code>
	</code>
			<code>upload_protocol = serial</code>

			<code>upload_port = /dev/ttyUSB0 # correct as needed</code>



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	'''Analog (0-3.3v) measurement:'''		'''Analog (0-3.3v) measurement:'''

	The 10 analog ~~Input~~ pins are 12-bit resolution.		The 10 analog input pins are 12-bit resolution.

	Analog inputs: PA0 - PA7, PB0, PB1		Analog inputs: PA0 - PA7, PB0, PB1


			'''PWM Output:'''

			There are 15 PWM pins total.

			PA0 - PA3, PA6 - PA10, PB0 - PB1, PB6 - PB9


			''!! First set the PWM settings for the chip in your setup():''

			<code>analogWriteResolution(8); # of bits of PWM resolution, max 16 bits</code>

			<code>analogWriteFrequency(1000); # PWM frequency in Hz, max unknown</code>


			Then you can use <code>analogWrite(PIN, VALUE)</code> as per usual.

			''N.B.: If you want to drive a PWM output from an analog reading, you can just set the analogWriteResolution to 12 and then you don't have to map the values!''


			'''Misc:'''

			The user-definable LED on the board is sink-ground through PC13. Set PC13 LOW to turn it on. '''Note: PC13 is not a PWM output.'''

Kc: Created page with " The BluePill is an inexpensive Arduino style microcontroller board built around the STMicroelectronics ARM Cortex-M3 STM32F103CT6 microcontroller. 501x501px The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price. VBAT can accept from 3 - 5VDC. 3V3 pins can alternatively be used to..."

2023-11-05T22:58:36Z

Created page with " The BluePill is an inexpensive Arduino style microcontroller board built around the STMicroelectronics ARM Cortex-M3 STM32F103CT6 microcontroller. frameless|501x501px The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price. VBAT can accept from 3 - 5VDC. 3V3 pins can alternatively be used to..."

New page

The BluePill is an inexpensive Arduino style microcontroller board built around the STMicroelectronics ARM Cortex-M3 STM32F103CT6 microcontroller.

[[File:BluePill pinout.png|frameless|501x501px]]

The 32-bit microcontroller runs at 72MHz, has 20k of RAM, 128k of flash, and a shitload of GPIO pins. At around $5 each, it's basically superior to all the Arduino options, at a fraction of the price.

VBAT can accept from 3 - 5VDC.

3V3 pins can alternatively be used to power the chip directly.

VBAT is not connected directly to USB P+. '''Do not power it from one of the pins and from the USB port at the same time.'''

'''To flash:'''

The USB port is basically useless.

- Connect a TTL-Serial adapter connected to UART1 (Pins PA9 & PA10 above, A9 A10 on the silkscreen).

- Set the "boot" jumper (top) to 1 (rightmost position).

- Press the [RESET] button

- Start your upload

''The program will execute immediately upon uploading, but not upon reset until you set the "boot" jumper back to 0.''

'''PlatformIO Configuration:'''

''platform: ststm32; board: bluepill_f103c8; framework: arduino''

'''platformio.ini''' settings using arduino framework and TTL Serial Upload:

<code>
[env:bluepill_f103c8]
platform = ststm32
board = bluepill_f103c8
framework = arduino
upload_protocol = serial
upload_port = /dev/ttyUSB0
</code>

'''Analog (0-3.3v) measurement:'''

The 10 analog Input pins are 12-bit resolution.

Analog inputs: PA0 - PA7, PB0, PB1