Need help for use I2C Slave mode #1711

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opened 2024-05-22 04:14:33 -05:00 by pierrotm777 · 2 comments

pierrotm777 commented

2024-05-22 04:14:33 -05:00

(Migrated from github.com)

Hello,

I try to create a Hitec telemetry simulator and i need to define my I2C1 port as slave on the address 0x08.
I use this code:
`#include "hardware/i2c.h"
#include "hardware/irq.h"
#include "hardware/gpio.h"

uint8_t address = 0x08;

#define I2C_INTR_MASK_RD_REQ 0x00000020

void setup() {
Serial.begin(9600);
while (!Serial)
;
i2c_init(i2c1, 100000L);
i2c_set_slave_mode(i2c1, true, address);
gpio_set_function(2, GPIO_FUNC_I2C);
gpio_set_function(3, GPIO_FUNC_I2C);
gpio_pull_up(2);
gpio_pull_up(3);
i2c1->hw->intr_mask = I2C_INTR_MASK_RD_REQ;
irq_set_exclusive_handler(I2C1_IRQ, handler);
irq_set_enabled(I2C1_IRQ, true);
}

void loop() {
}

void handler() {
i2c1->hw->clr_rd_req;
Serial.print("\nRequest from address: 0x");
Serial.println(address);
uint8_t packet[7] = {0x18, 0x17, 0x0, 0x0, 0x0, 0x0, 0x18};

//i2c_write_raw_blocking(i2c1, packet, 7);

for (uint8_t i = 0; i < 7; i++) {
i2c_write_byte_raw(i2c1, packet[i]);
Serial.print(packet[i], HEX);
Serial.print(" ");
}
}`
But if i use my logique analyser on the pins 2 et 3 i receive nothing.
Can you help me to find my error please ?

Thanks,

Pierre

Hello, I try to create a Hitec telemetry simulator and i need to define my I2C1 port as slave on the address 0x08. I use this code: `#include "hardware/i2c.h" #include "hardware/irq.h" #include "hardware/gpio.h" uint8_t address = 0x08; #define I2C_INTR_MASK_RD_REQ 0x00000020 void setup() { Serial.begin(9600); while (!Serial) ; i2c_init(i2c1, 100000L); i2c_set_slave_mode(i2c1, true, address); gpio_set_function(2, GPIO_FUNC_I2C); gpio_set_function(3, GPIO_FUNC_I2C); gpio_pull_up(2); gpio_pull_up(3); i2c1->hw->intr_mask = I2C_INTR_MASK_RD_REQ; irq_set_exclusive_handler(I2C1_IRQ, handler); irq_set_enabled(I2C1_IRQ, true); } void loop() { } void handler() { i2c1->hw->clr_rd_req; Serial.print("\nRequest from address: 0x"); Serial.println(address); uint8_t packet[7] = {0x18, 0x17, 0x0, 0x0, 0x0, 0x0, 0x18}; //i2c_write_raw_blocking(i2c1, packet, 7); for (uint8_t i = 0; i < 7; i++) { i2c_write_byte_raw(i2c1, packet[i]); Serial.print(packet[i], HEX); Serial.print(" "); } }` But if i use my logique analyser on the pins 2 et 3 i receive nothing. Can you help me to find my error please ? Thanks, Pierre

lurch commented

2024-05-22 04:20:22 -05:00

(Migrated from github.com)

Your usage of setup() ad loop() makes it look like you're using one of the Arduino environments? That's not something that we support ourselves. Can you update your example to just use "pure" pico-sdk code please?
Also have you looked at https://github.com/raspberrypi/pico-examples/tree/master/i2c/slave_mem_i2c ?

Your usage of `setup()` ad `loop()` makes it look like you're using one of the Arduino environments? That's not something that we support ourselves. Can you update your example to just use "pure" `pico-sdk` code please? Also have you looked at https://github.com/raspberrypi/pico-examples/tree/master/i2c/slave_mem_i2c ?

pierrotm777 commented

2024-05-22 04:55:34 -05:00

(Migrated from github.com)

hitec.zip
This is my code for my tests.

I wait this result with my analyser but the analyser don't see my frames from 0x11 to 0x1B.
Hitec_Orig.txt

[hitec.zip](https://github.com/raspberrypi/pico-sdk/files/15401444/hitec.zip) This is my code for my tests. I wait this result with my analyser but the analyser don't see my frames from 0x11 to 0x1B. [Hitec_Orig.txt](https://github.com/raspberrypi/pico-sdk/files/15401458/Hitec_Orig.txt)