switched to using default i2c pins

Author: Louis31423142

i2c/ina228_i2c/ina228_i2c.c

@@ -3,12 +3,10 @@
 #include "hardware/i2c.h"
 #include <math.h>
 
-// GPIOs, see circuit diagram
-#define I2C_SDA 8
-#define I2C_SCL 9
+// LED GPIOs
 #define EXT_LED_GPIO 2
 
-// Shunt resistor  values in ohms
+// INA228 integrated shunt resistance
 #define R_SHUNT 0.015
 
 // Max expected current through shunt resistor
@@ -49,16 +47,15 @@ static void ina228_init() {
     i2c_write_blocking(i2c_default, I2C_ADDR, shunt_buf, 3, false);
 
     // Write to ADC config register (need to enable continuous mode to access accumilation variables energy and charge)
-    // To enable contintinuous vbus, vshunt and temp, write 0x0F to bits 15-12
-    uint8_t adc_msb = 0xF1;
-    uint8_t adc_lsb = 0x11;
+    uint8_t adc_msb = 0xF0;
+    uint8_t adc_lsb = 0x00;
     uint8_t adc_buf[3] = {ADC_CONFIG_REG, adc_msb, adc_lsb};
     i2c_write_blocking(i2c_default, I2C_ADDR, adc_buf, 3, false);
 }
 
 static void ina228_read(float *vshunt, float *vbus, float *dietemp, float *current, float *power, float *energy, float *charge) {
     // Buffers for writing register measurments to
-    // Some registers are 2 byte, some are 3 byte, the accumilation registers are 5 byte
+    // Some registers are 2 bytes, some are 3 bytes, the accumilation registers are 5 bytes
     uint8_t buffer_2[2];
     uint8_t buffer_3[3];
     uint8_t buffer_5[5];
@@ -106,10 +103,10 @@ int main()
     i2c_init(i2c_default, 400*1000);
 
     // GPIO initialisiation
-    gpio_set_function(I2C_SDA, GPIO_FUNC_I2C);
-    gpio_set_function(I2C_SCL, GPIO_FUNC_I2C);
-    gpio_pull_up(I2C_SDA);
-    gpio_pull_up(I2C_SCL);
+    gpio_set_function(PICO_DEFAULT_I2C_SDA_PIN, GPIO_FUNC_I2C);
+    gpio_set_function(PICO_DEFAULT_I2C_SCL_PIN, GPIO_FUNC_I2C);
+    gpio_pull_up(PICO_DEFAULT_I2C_SDA_PIN);
+    gpio_pull_up(PICO_DEFAULT_I2C_SCL_PIN);
 
     // Initialise ina228
     ina228_init();