void vI2CInit( I2C_ID_T i2c_id, I2C_Mode mode )
{
char pcI2C_Tag[4];
uint8_t sla_addr;
sprintf( pcI2C_Tag, "I2C%u", i2c_id );
/*! @todo Maybe wrap these functions, or use some board-specific defines
* so this code is generic enough to be applied on other hardware.
* Example: (if using LPC17xx and LPCOpen library)
* @code
* #define PIN_FUNC_CFG( port, pin, func ) Chip_IOCON_PinMux(...)
* @endcode
*/
Chip_IOCON_PinMux( LPC_IOCON, i2c_cfg[i2c_id].pins.sda_port, i2c_cfg[i2c_id].pins.sda_pin, IOCON_MODE_INACT, i2c_cfg[i2c_id].pins.pin_func );
Chip_IOCON_PinMux( LPC_IOCON, i2c_cfg[i2c_id].pins.scl_port, i2c_cfg[i2c_id].pins.scl_pin, IOCON_MODE_INACT, i2c_cfg[i2c_id].pins.pin_func );
Chip_IOCON_EnableOD( LPC_IOCON, i2c_cfg[i2c_id].pins.sda_port, i2c_cfg[i2c_id].pins.sda_pin );
Chip_IOCON_EnableOD( LPC_IOCON, i2c_cfg[i2c_id].pins.scl_port, i2c_cfg[i2c_id].pins.scl_pin );
NVIC_SetPriority(i2c_cfg[i2c_id].irq, configMAX_SYSCALL_INTERRUPT_PRIORITY);
NVIC_EnableIRQ( i2c_cfg[i2c_id].irq );
/* Create mutex for accessing the shared memory (i2c_cfg) */
I2C_mutex[i2c_id] = xSemaphoreCreateMutex();
/* Make sure that the mutex is freed */
xSemaphoreGive( I2C_mutex[i2c_id] );
/* Set I2C operating mode */
if( xSemaphoreTake( I2C_mutex[i2c_id], 0 ) ) {
i2c_cfg[i2c_id].mode = mode;
xSemaphoreGive( I2C_mutex[i2c_id] );
}
/* Enable and configure I2C clock */
Chip_I2C_Init( i2c_id );
Chip_I2C_SetClockRate( i2c_id, 100000 );
/* Enable I2C interface (Master Mode only) */
I2CCONSET( i2c_id, I2C_I2EN );
if ( mode == I2C_Mode_IPMB )
{
/* Configure Slave Address */
sla_addr = get_ipmb_addr( );
I2CADDR_WRITE( i2c_id, sla_addr );
/* Configure Slave Address Mask */
I2CMASK( i2c_id, 0xFE);
/* Enable slave mode */
I2CCONSET( i2c_id, I2C_AA );
}
/* Clear I2C0 interrupt (just in case) */
I2CCONCLR( i2c_id, I2C_SI );
} /* End of vI2C_Init */
/* Sets up board specific I2C interface */
void Board_I2C_Init(I2C_ID_T id)
{
switch (id) {
case I2C0:
Chip_IOCON_PinMux(LPC_IOCON, 0, 27, IOCON_MODE_INACT, IOCON_FUNC1);
Chip_IOCON_PinMux(LPC_IOCON, 0, 28, IOCON_MODE_INACT, IOCON_FUNC1);
Chip_IOCON_SetI2CPad(LPC_IOCON, I2CPADCFG_STD_MODE);
break;
case I2C1:
Chip_IOCON_PinMux(LPC_IOCON, 0, 19, IOCON_MODE_INACT, IOCON_FUNC2);
Chip_IOCON_PinMux(LPC_IOCON, 0, 20, IOCON_MODE_INACT, IOCON_FUNC2);
Chip_IOCON_EnableOD(LPC_IOCON, 0, 19);
Chip_IOCON_EnableOD(LPC_IOCON, 0, 20);
break;
case I2C2:
Chip_IOCON_PinMux(LPC_IOCON, 0, 10, IOCON_MODE_INACT, IOCON_FUNC2);
Chip_IOCON_PinMux(LPC_IOCON, 0, 11, IOCON_MODE_INACT, IOCON_FUNC2);
Chip_IOCON_EnableOD(LPC_IOCON, 0, 10);
Chip_IOCON_EnableOD(LPC_IOCON, 0, 11);
break;
}
}
static void initHardware(void)
{
#if defined (__USE_LPCOPEN)
#if !defined(NO_BOARD_LIB)
// Read clock settings and update SystemCoreClock variable
SystemCoreClockUpdate();
// Set up and initialize all required blocks and
// functions related to the board hardware
Board_Init();
// Set the LED to the state of "Off"
Board_LED_Set(0, false);
#endif
#endif
Board_I2C_Init(I2C1);
/* pines del stick */
Chip_IOCON_PinMux(LPC_IOCON, 0, 0, IOCON_MODE_INACT, IOCON_FUNC3);
Chip_IOCON_PinMux(LPC_IOCON, 0, 1, IOCON_MODE_INACT, IOCON_FUNC3);
Chip_IOCON_EnableOD(LPC_IOCON, 0, 0);
Chip_IOCON_EnableOD(LPC_IOCON, 0, 1);
Chip_I2C_SetClockRate(I2C1, 100000);
Chip_I2C_SetMasterEventHandler(I2C1, Chip_I2C_EventHandlerPolling);
}