Hi folks, I'm trying to receive a string on UART0, and at the most basic step to get the number of bytes available in the RX FIFO buffer. I try to use the magic formulae fifo_len = (READ_PERI_REG(UART_STATUS(UART0)) >> UART_RXFIFO_CNT_S) & UART_RXFIFO_CNT; in a callback function, and from my PC ...

Okay, most of these issues were because the code in uart.c - which I believed to be a simple classic UART driver - actually implemented some processing of the bytes like reprinting them. I simply removed most of the code in this file to write my own driver. (https://bbs.espressif.com/viewtopic.php?f...

It's a custom firmware written in C (I also test with the few lines of code above) built with NON-OS SDK (esp-open-sdk). I just hacked the SDKto enable the modf() functions (https://bbs.espressif.com/viewtopic.php?f=7&t=9432)... Maybe PWM is somehow linked to modudulus functions ant that breaks ...

So I erased the flash with "esptool.py erase_flash", and then as he ESP was bricked with error "rf_cal[0] !=0x05,is 0xFF", I re-flashed all the blank.bin, eagle.irom0.bin and so to init the ROM and re-flashed my software. I got the same glitches and frequency offset on my PWM. I ...

I'm using NONOS-SDK-2.2.0, built with esp-open-sdk toolchain.
I'll try the previous SDK in few days if I have a little free time...

Hey folks, Now I'm playing with the PWM API on a ESP-WROOM-02. I can get a PWM output on the pin, but the signal is quite dirty: - Each cycle is preceeded by a glitch - The period is longer than the one set in the code, probably because of this glitch - It occures with different duty cycles and peri...

Okay, thanks to have made it clear !

Hey, In this raw brute ugly test code, indeed I receive a HTTP header before the data but I don't bother parsing it. I just store the bytes as they arrive in buffer_g_u8[] until I have 512 bytes. Then I assume that in this 512 bytes there is the full header and the start of the data payload (my .bin...

(Just a though, but could it be because you are flirting with the time resolution of system_get_time() which is 1 mirosec ? Also maybe the roundings to compute bit_time lead to the loss of synchronization between the ESP and the receiver at the other end...)

Hey folks, It's still unclear for me. When generating an image for the ESP or when flashing it, we are asked to indicate what flash map, which SPI mode and which SPI frequency we want to use. This info is then included in the header of the image. My question is: Do we have to select the values that ...