uint8_t init_pca9685(uint8_t addr)
{
uint8_t rc;
uint8_t bytes[2];
ets_printf("PCA9685 init ... ");
// Write MODE1 register (key bits are to set auto-increment and turn off sleep mode
bytes[0] = 0x00; // MODE1 register
bytes[1] = 0b00100001; // reset = 1, AI = 1, sleep = 0, allcall = 1
brzo_i2c_start_transaction(addr, 100);
brzo_i2c_write(bytes, 2, FALSE);
rc = brzo_i2c_end_transaction();
if (rc)
{
ets_printf("failed write: %d\r\n", rc);
goto EXIT_LABEL;
}
// Now read back the register to check it took
brzo_i2c_start_transaction(addr, 100);
brzo_i2c_write(bytes, 1, FALSE);
brzo_i2c_read(bytes, 1, FALSE);
rc = brzo_i2c_end_transaction();
if (!rc)
{
if (bytes[0] == bytes[1])
{
ets_printf("success\r\n");
goto EXIT_LABEL;
}
else
{
ets_printf("failed read mismatch: 0x%02x\r\n", bytes[0]);
}
}
else
{
ets_printf("failed read: %d\r\n", rc);
}
EXIT_LABEL:
return rc;
}
void toggle_pca9685_leds(uint8_t addr, bool desired_state)
{
uint8_t rc;
bool will_be_on;
uint8_t bytes[8];
// Turn all LEDs on or off
// To turn specific LEDs on or off set byte 0 (register) to 0x06 for LED 0,
// 0x0A for LED 1, 0x0E for LED2, ...
bytes[0] = 0xfa; // All LEDs
// bytes[0] = 0x06; // LED 0 only
ets_printf("Turn LED(s) ");
if (!desired_state)
{
// Turn off
ets_printf("off ... ");
bytes[1] = 0;
bytes[2] = 0;
bytes[3] = 0;
bytes[4] = 0b00010000;
will_be_on = FALSE;
}
else
{
// Turn on
ets_printf("on ... ");
bytes[1] = 0;
bytes[2] = 0b00010000;
bytes[3] = 0;
bytes[4] = 0;
will_be_on = TRUE;
}
brzo_i2c_start_transaction(addr, 100);
brzo_i2c_write(bytes, 5, FALSE);
rc = brzo_i2c_end_transaction();
if (rc)
{
ets_printf("failed: %d\r\n", rc);
goto EXIT_LABEL;
}
if (!rc)
{
ets_printf("success\r\n");
}
pca9685_on = will_be_on;
EXIT_LABEL:
return;
}
uint8_t TwoWire::endTransmission(uint8_t sendStop){
//uint8_t ret = twi_writeTo(txAddress, txBuffer, txBufferLength, sendStop);
brzo_i2c_write(txBuffer, txBufferLength, !sendStop);
uint8_t ret = brzo_i2c_end_transaction();
txBufferIndex = 0;
txBufferLength = 0;
transmitting = 0;
//return ret;
return ret;
}
uint8_t reset_i2c(void)
{
uint8_t rc;
uint8_t bytes[2];
ets_printf("I2C Software Reset Call ... ");
bytes[0] = 0; // general call address
bytes[1] = 0b00000110; // SWRST data
brzo_i2c_start_transaction(PCA9685_ADDR, 100);
brzo_i2c_write(bytes, 2, FALSE);
rc = brzo_i2c_end_transaction();
if (!rc)
{
ets_printf("success\r\n");
}
else
{
ets_printf("failed\r\n");
}
return rc;
}
