is it possible to minimize the time taken to send stop bit in repeated start mode #2503

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opened 2025-06-05 02:29:16 -05:00 by kowshick16 · 5 comments

kowshick16 commented

2025-06-05 02:29:16 -05:00

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Here in below image, stop bit coming after 5ms in repeated start mode. is it possible to configure that time ? i want the stop bit to go immediately / the time i specified is sent.

i'm looking for ways to control this in both start-stop method and repeated start method ?

Here in below image, stop bit coming after 5ms in repeated start mode. is it possible to configure that time ? i want the stop bit to go immediately / the time i specified is sent. i'm looking for ways to control this in both start-stop method and repeated start method ? ![Image](https://github.com/user-attachments/assets/6a069f52-c4cb-4b27-af1f-8cc701832b1c)

peterharperuk commented

2025-06-05 02:38:51 -05:00

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What code are you using? What hardware are you using?

kowshick16 commented

2025-06-05 07:19:46 -05:00

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I have PICO H RP2040. im using the function "i2c_write_blocking" for sending the data. similar one for read

int i2c_write_blocking(i2c_inst_t *i2c, uint8_t addr, const uint8_t *src, size_t len, bool nostop) {
return i2c_write_blocking_internal(i2c, addr, src, len, nostop, NULL, NULL);
}

I have PICO H RP2040. im using the function "i2c_write_blocking" for sending the data. similar one for read int i2c_write_blocking(i2c_inst_t *i2c, uint8_t addr, const uint8_t *src, size_t len, bool nostop) { return i2c_write_blocking_internal(i2c, addr, src, len, nostop, NULL, NULL); }

kowshick16 commented

2025-06-06 02:14:03 -05:00

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code for repeated start mode:

uint8_t i2c_if_read(i2c_inst_t *i2c, uint8_t address, uint8_t *data, uint8_t size)
{
return i2c_read_blocking(i2c, address, data, size, true);
}

code for repeated start mode: uint8_t i2c_if_read(i2c_inst_t *i2c, uint8_t address, uint8_t *data, uint8_t size) { return i2c_read_blocking(i2c, address, data, size, true); }

kowshick16 commented

2025-06-12 12:16:05 -05:00

(Migrated from github.com)