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Can I program a factory fresh Atmega328P through UART pins without burning a bootloader?
I bought USB > FT232RL, can I use it to program a bootloader onto an Arduino?Problem programming Mini Pro via Arduino as ISPBootloader only works once with usb to serial moduleTrying to verify that Arduino Pro Micro ISP is workingConfusion with ATmega328P and 3.3V/8MHzHow do I know if bootloader flash was successful?Atmega328p ISP won't workfailure to burn bootloader in ATMEGA328P on breadboard32u4 using internal clock on custom PCB - loading sketchWhat would cause fuses to be writeable but bootloader not to be writeable?
Can I program a factory fresh ATMega328P using the UART pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins in the schematic below. They are not the ISP/SPI pins 10-13.
Arduino Pro Mini schematic
For example, if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer, you're not connected to the ISP pins (basically the SPI interface: MOSI, MISO, SCLK, SS), but rather to the serial i/o and reset pins.
My understanding is that a bootloader is required if you want to program through these pins, because the Arduino bootloader looks for UART traffic at these pins upon startup and hands off operation to the user's code if no attempt at programming happens during this time.
That said, I also understand burning a bootloader is done through the ISP/SPI pins, and my PCB is already manufactured, which makes burning a boatloader somewhat of a hassle. So...
Can I program an ATMega328P through the UART pins fresh off the reel, or will I need rig up a way to burn a bootloader through the ISP pins first?
avr bootloader isp
edited May 8 at 8:41
Juraj
8,62221129
asked May 3 at 15:23
schadjoschadjo
1214
migrated from electronics.stackexchange.com May 3 at 17:21
This question came from our site for electronics and electrical engineering professionals, students, and enthusiasts.
add a comment |
Can I program a factory fresh ATMega328P using the UART pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins in the schematic below. They are not the ISP/SPI pins 10-13.
Arduino Pro Mini schematic
For example, if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer, you're not connected to the ISP pins (basically the SPI interface: MOSI, MISO, SCLK, SS), but rather to the serial i/o and reset pins.
My understanding is that a bootloader is required if you want to program through these pins, because the Arduino bootloader looks for UART traffic at these pins upon startup and hands off operation to the user's code if no attempt at programming happens during this time.
That said, I also understand burning a bootloader is done through the ISP/SPI pins, and my PCB is already manufactured, which makes burning a boatloader somewhat of a hassle. So...
Can I program an ATMega328P through the UART pins fresh off the reel, or will I need rig up a way to burn a bootloader through the ISP pins first?
avr bootloader isp
edited May 8 at 8:41
Juraj
8,62221129
asked May 3 at 15:23
schadjoschadjo
1214
migrated from electronics.stackexchange.com May 3 at 17:21
This question came from our site for electronics and electrical engineering professionals, students, and enthusiasts.
1
"... using the ICSP pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins ... They are not the ISP/SPI pins ..." - ICSP is commonly used as a synonym of ISP, so for the 328P, that means through the SPI pins. Yes, you can do this to a factory-fresh 328P, but not through the pins you have in mind.
– marcelm
May 3 at 16:15
3
"if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer," no, for Mini Pro you need an USB to TTL Serial adapter for programming over UART and bootloader
– Juraj
May 3 at 18:56
add a comment |
Can I program a factory fresh ATMega328P using the UART pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins in the schematic below. They are not the ISP/SPI pins 10-13.
Arduino Pro Mini schematic
For example, if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer, you're not connected to the ISP pins (basically the SPI interface: MOSI, MISO, SCLK, SS), but rather to the serial i/o and reset pins.
My understanding is that a bootloader is required if you want to program through these pins, because the Arduino bootloader looks for UART traffic at these pins upon startup and hands off operation to the user's code if no attempt at programming happens during this time.
That said, I also understand burning a bootloader is done through the ISP/SPI pins, and my PCB is already manufactured, which makes burning a boatloader somewhat of a hassle. So...
Can I program an ATMega328P through the UART pins fresh off the reel, or will I need rig up a way to burn a bootloader through the ISP pins first?
avr bootloader isp
edited May 8 at 8:41
Juraj
8,62221129
asked May 3 at 15:23
schadjoschadjo
1214
Can I program a factory fresh ATMega328P using the UART pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins in the schematic below. They are not the ISP/SPI pins 10-13.
Arduino Pro Mini schematic
For example, if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer, you're not connected to the ISP pins (basically the SPI interface: MOSI, MISO, SCLK, SS), but rather to the serial i/o and reset pins.
My understanding is that a bootloader is required if you want to program through these pins, because the Arduino bootloader looks for UART traffic at these pins upon startup and hands off operation to the user's code if no attempt at programming happens during this time.
That said, I also understand burning a bootloader is done through the ISP/SPI pins, and my PCB is already manufactured, which makes burning a boatloader somewhat of a hassle. So...
Can I program an ATMega328P through the UART pins fresh off the reel, or will I need rig up a way to burn a bootloader through the ISP pins first?
avr bootloader isp
avr bootloader isp
edited May 8 at 8:41
Juraj
8,62221129
asked May 3 at 15:23
schadjoschadjo
1214
edited May 8 at 8:41
Juraj
8,62221129
asked May 3 at 15:23
schadjoschadjo
1214
edited May 8 at 8:41
Juraj
8,62221129
edited May 8 at 8:41
Juraj
8,62221129
edited May 8 at 8:41
Juraj
8,62221129
8,62221129
asked May 3 at 15:23
schadjoschadjo
1214
asked May 3 at 15:23
schadjoschadjo
1214
asked May 3 at 15:23
schadjoschadjo
1214
1214
migrated from electronics.stackexchange.com May 3 at 17:21
This question came from our site for electronics and electrical engineering professionals, students, and enthusiasts.
migrated from electronics.stackexchange.com May 3 at 17:21
This question came from our site for electronics and electrical engineering professionals, students, and enthusiasts.
1
"... using the ICSP pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins ... They are not the ISP/SPI pins ..." - ICSP is commonly used as a synonym of ISP, so for the 328P, that means through the SPI pins. Yes, you can do this to a factory-fresh 328P, but not through the pins you have in mind.
– marcelm
May 3 at 16:15
3
"if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer," no, for Mini Pro you need an USB to TTL Serial adapter for programming over UART and bootloader
– Juraj
May 3 at 18:56
add a comment |
1
"... using the ICSP pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins ... They are not the ISP/SPI pins ..." - ICSP is commonly used as a synonym of ISP, so for the 328P, that means through the SPI pins. Yes, you can do this to a factory-fresh 328P, but not through the pins you have in mind.
– marcelm
May 3 at 16:15
3
"if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer," no, for Mini Pro you need an USB to TTL Serial adapter for programming over UART and bootloader
– Juraj
May 3 at 18:56
1
1
"... using the ICSP pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins ... They are not the ISP/SPI pins ..." - ICSP is commonly used as a synonym of ISP, so for the 328P, that means through the SPI pins. Yes, you can do this to a factory-fresh 328P, but not through the pins you have in mind.
– marcelm
May 3 at 16:15
"... using the ICSP pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins ... They are not the ISP/SPI pins ..." - ICSP is commonly used as a synonym of ISP, so for the 328P, that means through the SPI pins. Yes, you can do this to a factory-fresh 328P, but not through the pins you have in mind.
– marcelm
May 3 at 16:15
3
3
"if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer," no, for Mini Pro you need an USB to TTL Serial adapter for programming over UART and bootloader
– Juraj
May 3 at 18:56
"if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer," no, for Mini Pro you need an USB to TTL Serial adapter for programming over UART and bootloader
– Juraj
May 3 at 18:56
add a comment |
1 Answer
1
active
oldest
votes
No, the ATmega's ISP does not operate over the UART pins but only the ISP pins.
To program it via a UART, you need to first load a bootloader, unless your chip was pre-programmed by the vendor, something some offer as a value-added service (or even as an essential stock item, with an Arduino type bootloader)
answered May 3 at 15:26
Chris StrattonChris Stratton
5,0741028
Thanks for confirming.... Whenever I think I've done enough research, I find out that, nope, I don't know anything. It's good to have experts around.
– schadjo
May 3 at 15:29
add a comment |
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1 Answer
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1 Answer
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votes
No, the ATmega's ISP does not operate over the UART pins but only the ISP pins.
To program it via a UART, you need to first load a bootloader, unless your chip was pre-programmed by the vendor, something some offer as a value-added service (or even as an essential stock item, with an Arduino type bootloader)
answered May 3 at 15:26
Chris StrattonChris Stratton
5,0741028
Thanks for confirming.... Whenever I think I've done enough research, I find out that, nope, I don't know anything. It's good to have experts around.
– schadjo
May 3 at 15:29
add a comment |
No, the ATmega's ISP does not operate over the UART pins but only the ISP pins.
To program it via a UART, you need to first load a bootloader, unless your chip was pre-programmed by the vendor, something some offer as a value-added service (or even as an essential stock item, with an Arduino type bootloader)
answered May 3 at 15:26
Chris StrattonChris Stratton
5,0741028
Thanks for confirming.... Whenever I think I've done enough research, I find out that, nope, I don't know anything. It's good to have experts around.
– schadjo
May 3 at 15:29
add a comment |
No, the ATmega's ISP does not operate over the UART pins but only the ISP pins.
To program it via a UART, you need to first load a bootloader, unless your chip was pre-programmed by the vendor, something some offer as a value-added service (or even as an essential stock item, with an Arduino type bootloader)
answered May 3 at 15:26
Chris StrattonChris Stratton
5,0741028
No, the ATmega's ISP does not operate over the UART pins but only the ISP pins.
To program it via a UART, you need to first load a bootloader, unless your chip was pre-programmed by the vendor, something some offer as a value-added service (or even as an essential stock item, with an Arduino type bootloader)
answered May 3 at 15:26
Chris StrattonChris Stratton
5,0741028
answered May 3 at 15:26
Chris StrattonChris Stratton
5,0741028
answered May 3 at 15:26
Chris StrattonChris Stratton
5,0741028
answered May 3 at 15:26
Chris StrattonChris Stratton
5,0741028
5,0741028
Thanks for confirming.... Whenever I think I've done enough research, I find out that, nope, I don't know anything. It's good to have experts around.
– schadjo
May 3 at 15:29
add a comment |
Thanks for confirming.... Whenever I think I've done enough research, I find out that, nope, I don't know anything. It's good to have experts around.
– schadjo
May 3 at 15:29
Thanks for confirming.... Whenever I think I've done enough research, I find out that, nope, I don't know anything. It's good to have experts around.
– schadjo
May 3 at 15:29
Thanks for confirming.... Whenever I think I've done enough research, I find out that, nope, I don't know anything. It's good to have experts around.
– schadjo
May 3 at 15:29
add a comment |
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1
"... using the ICSP pins without burning a bootloader? These pins are TX, RX, VCC, GND, and DTR pins ... They are not the ISP/SPI pins ..." - ICSP is commonly used as a synonym of ISP, so for the 328P, that means through the SPI pins. Yes, you can do this to a factory-fresh 328P, but not through the pins you have in mind.
– marcelm
May 3 at 16:15
3
"if you program an Arduino Pro Mini (which requires an ICSP programmer) with a programmer," no, for Mini Pro you need an USB to TTL Serial adapter for programming over UART and bootloader
– Juraj
May 3 at 18:56