Keuronde/I2C_Slave
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fonctionnel

Browse Source
This commit is contained in:
Samuel 2026-01-17 18:18:39 +01:00
parent 80593efd46
commit 693446dfe0
1 changed files with 15 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
main.c
View File

@ -11,14 +11,16 @@
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
static const uint I2C_SLAVE_ADDRESS = 0x17; static const uint I2C_SLAVE_ADDRESS = 0x09;
static const uint I2C_BAUDRATE = 100000; // 100 kHz static const uint I2C_BAUDRATE = 100000; // 100 kHz
uint reception;
#ifdef i2c_default #ifdef i2c_default
// For this example, we run both the master and slave from the same board. // For this example, we run both the master and slave from the same board.
// You'll need to wire pin GP4 to GP6 (SDA), and pin GP5 to GP7 (SCL). // You'll need to wire pin GP4 to GP6 (SDA), and pin GP5 to GP7 (SCL).
static const uint I2C_SLAVE_SDA_PIN = 19; // 4 static const uint I2C_SLAVE_SDA_PIN = 17; // 17
static const uint I2C_SLAVE_SCL_PIN = 18; // 5 static const uint I2C_SLAVE_SCL_PIN = 16; // 16
static const uint I2C_MASTER_SDA_PIN = 6; static const uint I2C_MASTER_SDA_PIN = 6;
static const uint I2C_MASTER_SCL_PIN = 7; static const uint I2C_MASTER_SCL_PIN = 7;
@ -55,6 +57,7 @@ static void i2c_slave_handler(i2c_inst_t *i2c, i2c_slave_event_t event) {
break; break;
case I2C_SLAVE_FINISH: // master has signalled Stop / Restart case I2C_SLAVE_FINISH: // master has signalled Stop / Restart
context.mem_address_written = false; context.mem_address_written = false;
reception++;
break; break;
default: default:
break; break;
@ -70,9 +73,9 @@ static void setup_slave() {
gpio_set_function(I2C_SLAVE_SCL_PIN, GPIO_FUNC_I2C); gpio_set_function(I2C_SLAVE_SCL_PIN, GPIO_FUNC_I2C);
gpio_pull_up(I2C_SLAVE_SCL_PIN); gpio_pull_up(I2C_SLAVE_SCL_PIN);
i2c_init(i2c1, I2C_BAUDRATE); i2c_init(i2c0, I2C_BAUDRATE);
// configure I2C1 for slave mode // configure I2C1 for slave mode
i2c_slave_init(i2c1, I2C_SLAVE_ADDRESS, &i2c_slave_handler); i2c_slave_init(i2c0, I2C_SLAVE_ADDRESS, &i2c_slave_handler);
} }
#endif #endif
@ -90,8 +93,13 @@ int main() {
setup_slave(); setup_slave();
//run_master(); //run_master();
while(1){ while(1){
puts("\nI2C slave example\n"); if(reception != 0){
sleep_ms(1000); puts("reception != 0\n");
reception = 0;
printf(">a:%d\n", context.mem[0]);
}
puts("I2C slave example\n");
sleep_ms(10);
} }
#endif #endif
} }