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by VaporGame
Mon Aug 18, 2025 5:13 am
Forum: General Discussion
Topic: ESP32-S3 Bare metal UART not working
Replies: 1
Views: 187

Re: ESP32-S3 Bare metal UART not working

I have gotten it to transmit by fixing my register accesses, but now when i try to switch it to the APB clock, for some reason with the correct divisor for 115200 baud at 80Mhz it doesnt work, but it works with the divisor for 115200 baud at 20Mhz. From what i read the APB clock should always be at ...
by VaporGame
Sat Aug 16, 2025 1:52 pm
Forum: General Discussion
Topic: ESP32-S3 Bare metal UART not working
Replies: 1
Views: 187

ESP32-S3 Bare metal UART not working

I have been trying to write code for the ESP32-S3 without using the IDF that initializes the uart and writes something to it, but i have been unable to get it to work with many attempts.

Here is my current code:

#define UART_TX_PIN 1
#define UART_RX_PIN 2

void uart_init(uint32_t baud_rate ...

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