Search found 19 matches

by Xavi92
Fri Mar 20, 2020 10:38 am
Forum: ESP32 IDF
Topic: esp-idf use of std=gnu99
Replies: 3
Views: 635

Re: esp-idf use of std=gnu99

Hi Angus,

Thank you very much for your answer and the examples provided. Then I guess std=gnu99 is there for historical reasons, right?

Best regards,
Xavi
by Xavi92
Thu Mar 19, 2020 2:54 pm
Forum: ESP32 IDF
Topic: esp-idf use of std=gnu99
Replies: 3
Views: 635

Re: esp-idf use of std=gnu99

Could anyone please provide an answer to this topic?
Thank you very much.
by Xavi92
Thu Mar 19, 2020 2:53 pm
Forum: Report Bugs
Topic: parttool.py crashes when retrieving partition info
Replies: 2
Views: 2137

Re: parttool.py crashes when retrieving partition info

Could anyone please confirm this issue?
Thank you very much.
by Xavi92
Thu Mar 05, 2020 10:29 am
Forum: Report Bugs
Topic: parttool.py crashes when retrieving partition info
Replies: 2
Views: 2137

parttool.py crashes when retrieving partition info

Using parttool.py from esp-idf v4.0 tag ( commit hash f9cb434eeb90be4f34893a278d0a70a8b21e4ca2 ), the following error appears when attempting to retrieve partition info: $ parttool.py --partition-table-file partition_table.csv get_partition_info --partition-name ota_data Traceback (most recent call ...
by Xavi92
Tue Mar 03, 2020 8:56 am
Forum: ESP32 IDF
Topic: esp-idf use of std=gnu99
Replies: 3
Views: 635

esp-idf use of std=gnu99

Hello, Is there any technical reason why esp-idf v4.0 and release/v4.1 are still using std=gnu99 over newer versions of the language (such as gnu11)? The following preprocessor-time error triggers on std=gnu99: #define STR(x) #x #define _STR(x) STR(x) #if __STDC_VERSION__ >= 201112L /* C11-compliant...
by Xavi92
Thu Feb 13, 2020 8:04 am
Forum: Report Bugs
Topic: openocd-esp32: missing repository py_debug_backend
Replies: 0
Views: 1987

openocd-esp32: missing repository py_debug_backend

As already referenced by this issue : I cloned openocd-esp32 from github yesterday and the following error appeared when running ./bootstrap: $ ./bootstrap + aclocal + libtoolize --automake --copy + autoconf configure.ac:12: error: possibly undefined macro: AC_MSG_WARN If this token and others are l...
by Xavi92
Mon Nov 25, 2019 9:54 pm
Forum: Hardware
Topic: Improving debug speed on an Altera USB Blaster clone
Replies: 7
Views: 2898

Re: Improving debug speed on an Altera USB Blaster clone

I am sorry for reviving such an old topic, but I wanted to bring some news on this area. Finally I got one of these units and debugging is now as responsive as one could expect. I used the esp32_devkitj_v1.cfg script included on the openocd fork by Espressif, but had to make a couple of slight modif...
by Xavi92
Mon Nov 04, 2019 1:46 am
Forum: Hardware
Topic: Is it possible to drive a 480x320 TFT at >43 Hz?
Replies: 0
Views: 363

Is it possible to drive a 480x320 TFT at >43 Hz?

Hello, I am considering a 3.5" TFT ILI9481-based (480x320 pixels, 16 bpp) display with an ESP32-WROOM-32, and I am aiming for display moving pictures with no tearing at all. According to the ILI9481 datasheet, frame rate can be adjusted via the "Frame Rate and Inversion Control" command (ID C5h) as ...
by Xavi92
Mon Jun 10, 2019 4:21 pm
Forum: Hardware
Topic: How to use I2S along with 8-bit parallel bus
Replies: 5
Views: 1477

Re: How to use I2S along with 8-bit parallel bus

As shown below, a complete screen takes ~38 ms, but the tearing effect signal (see D4) asserts every 24 ms. 480 x 320 x 2bpp = 307200 bytes are being sent there, so this approaches to ~8 Mbytes per second. However, is there any way to make I2S1 transfer shorter than 24 ms? https://i.postimg.cc/Y9RWM...
by Xavi92
Tue Jun 04, 2019 7:10 pm
Forum: Hardware
Topic: How to use I2S along with 8-bit parallel bus
Replies: 5
Views: 1477

Re: How to use I2S along with 8-bit parallel bus

I don't see anything particularly sketchy in your code, but you are aware that the I2S peripheral shifts out the bytes in a weird way? If I recall correctly, a word like 0x12345678 would be sent as 0x34, 0x12, 0x78, 0x56. You probably need to shift your DMA data in a similar way. I can confirm such...

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