void i2cInit(){ PORTB.DIRCLR = PIN5_bm; PORTB.PIN5CTRL = PORT_OPC_WIREDOR_gc; PORTE.DIRSET = PIN0_bm | PIN1_bm; twi = &twiMaster; TWI_MasterInit(&TWIE, TWI_MASTER_INTLVL_HI_gc, TWI_BAUD(F_CPU, 100000)); }
void i2c400_init(void) { m_options.speed_reg = TWI_BAUD(sysclk_get_cpu_hz(),m_options.speed); sysclk_enable_peripheral_clock(&TWI_I2C400); twi_master_init(&TWI_I2C400,&m_options); }
// Supporting function implementation Accelerometer::Accelerometer() { // Initialize variables uint8_t value; // Configure VDDIO, SDA and SCL pins ioport_set_pin_dir(ACCELEROMETER_VDDIO_PIN, IOPORT_DIR_OUTPUT); ioport_set_pin_level(ACCELEROMETER_VDDIO_PIN, IOPORT_PIN_LEVEL_HIGH); ioport_set_pin_mode(ACCELEROMETER_SDA_PIN, IOPORT_MODE_WIREDANDPULL); ioport_set_pin_mode(ACCELEROMETER_SCL_PIN, IOPORT_MODE_WIREDANDPULL); // Configure interface twi_options_t options; options.speed = BUS_SPEED; options.chip = MASTER_ADDRESS; options.speed_reg = TWI_BAUD(sysclk_get_cpu_hz(), BUS_SPEED); // Initialize interface sysclk_enable_peripheral_clock(&TWI_MASTER); twi_master_init(&TWI_MASTER, &options); twi_master_enable(&TWI_MASTER); // Create packet twi_package_t packet; packet.addr[0] = WHO_AM_I; packet.addr_length = 1; packet.chip = ACCELEROMETER_ADDRESS; packet.buffer = &value; packet.length = 1; packet.no_wait = false; // Check if transmitting or receiving failed if(twi_master_read(&TWI_MASTER, &packet) != TWI_SUCCESS || value != DEVICE_ID) // Clear is working isWorking = false; // Otherwise else { // Reset the accelerometer writeValue(CTRL_REG2, CTRL_REG2_RST); // Wait enough time for accelerometer to initialize delay_ms(1); // Initialize settings initializeSettings(); // Calibrate //calibrate(); // Set is working isWorking = true; } }
void i2c_init() { if (i2c_initialized) return; // Initialize TWI master. TWI_MasterInit(&i2c, &TWIE, TWI_MASTER_INTLVL_LO_gc, TWI_BAUD(F_CPU, 400000)); PMIC.CTRL |= PMIC_LOLVLEN_bm; i2c_initialized = true; }
void imu_init(void) { twi_master_init(&imu_twi, &IMU_TWI, TWI_MASTER_INTLVL_LO_gc, TWI_BAUD(F_CPU, 400000)); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_CTRL2, 0x37); /* HPF autoreset, cut-off @ 0.1hz when ODR=200 */ imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_CTRL3, 0x00); /* */ imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_CTRL4, 0x80); /* block data update, FS = 250dps */ imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_REF, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_INT1_THS_XH, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_INT1_THS_XL, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_INT1_THS_YH, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_INT1_THS_YL, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_INT1_THS_ZH, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_INT1_THS_ZL, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_INT1_DURATION, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_INT1_CFG, 0x00); imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_CTRL5, 0x13); /* HPF and LPF2 enable */ imu_write_reg(IMU_GYRO_ADDR, IMU_GYRO_CTRL1, 0x60); /* power off, LPF1->54hz, LPF2->50hz, ODR->200hz */ //////////////// //////////////// imu_write_reg(IMU_ACCEL_ADDR, IMU_ACCEL_CTRL1, 0x0f); /* power off, ODR->100hz, LPF->74hz */ // imu_write_reg(IMU_ACCEL_ADDR, IMU_ACCEL_CTRL2, 0x12); /* enable FDS, HPF cut-off @ 0.5hz */ imu_write_reg(IMU_ACCEL_ADDR, IMU_ACCEL_CTRL2, 0x00); /* disable FDS */ imu_write_reg(IMU_ACCEL_ADDR, IMU_ACCEL_CTRL3, 0x00); /* data ready on INT1 */ imu_write_reg(IMU_ACCEL_ADDR, IMU_ACCEL_CTRL4, 0x80); /* block data update, FS = 2g */ imu_write_reg(IMU_ACCEL_ADDR, IMU_ACCEL_CTRL5, 0x00); /* disable sleep to wake */ imu_write_reg(IMU_ACCEL_ADDR, IMU_ACCEL_INT1_CFG, 0x40); /* 6 direction movement */ }
ATCA_STATUS hal_i2c_discover_devices(int busNum, ATCAIfaceCfg cfg[], int *found ) { ATCAIfaceCfg *head = cfg; uint8_t slaveAddress = 0x01; ATCADevice device; ATCAIface discoverIface; ATCACommand command; ATCAPacket packet; uint32_t execution_time; ATCA_STATUS status; uint8_t revs508[1][4] = { { 0x00, 0x00, 0x50, 0x00 } }; uint8_t revs108[1][4] = { { 0x80, 0x00, 0x10, 0x01 } }; uint8_t revs204[2][4] = { { 0x00, 0x02, 0x00, 0x08 }, { 0x00, 0x04, 0x05, 0x00 } }; int i; /** \brief default configuration, to be reused during discovery process */ ATCAIfaceCfg discoverCfg = { .iface_type = ATCA_I2C_IFACE, .devtype = ATECC508A, .atcai2c.slave_address = 0x07, .atcai2c.bus = busNum, .atcai2c.baud = 400000, //.atcai2c.baud = 100000, .wake_delay = 800, .rx_retries = 3 }; // build an info command packet.param1 = INFO_MODE_REVISION; packet.param2 = 0; device = newATCADevice( &discoverCfg ); discoverIface = atGetIFace( device ); command = atGetCommands( device ); // iterate through all addresses on given i2c bus // all valid 7-bit addresses go from 0x07 to 0x78 for ( slaveAddress = 0x07; slaveAddress <= 0x78; slaveAddress++ ) { discoverCfg.atcai2c.slave_address = slaveAddress << 1; // turn it into an 8-bit address which is what the rest of the i2c HAL is expecting when a packet is sent // wake up device // If it wakes, send it a dev rev command. Based on that response, determine the device type // BTW - this will wake every cryptoauth device living on the same bus (ecc508a, sha204a) if ( hal_i2c_wake( discoverIface ) == ATCA_SUCCESS ) { (*found)++; memcpy( (uint8_t*)head, (uint8_t*)&discoverCfg, sizeof(ATCAIfaceCfg)); memset( packet.info, 0x00, sizeof(packet.info)); // get devrev info and set device type accordingly atInfo( command, &packet ); execution_time = atGetExecTime(command, CMD_INFO) + 1; // send the command if ( (status = atsend( discoverIface, (uint8_t*)&packet, packet.txsize )) != ATCA_SUCCESS ) { printf("packet send error\r\n"); continue; } // delay the appropriate amount of time for command to execute atca_delay_ms(execution_time); // receive the response if ( (status = atreceive( discoverIface, &(packet.info[0]), &(packet.rxsize) )) != ATCA_SUCCESS ) continue; if ( (status = isATCAError(packet.info)) != ATCA_SUCCESS ) { printf("command response error\r\n"); continue; } // determine device type from common info and dev rev response byte strings for ( i = 0; i < sizeof(revs508) / 4; i++ ) { if ( memcmp( &packet.info[1], &revs508[i], 4) == 0 ) { discoverCfg.devtype = ATECC508A; break; } } for ( i = 0; i < sizeof(revs204) / 4; i++ ) { if ( memcmp( &packet.info[1], &revs204[i], 4) == 0 ) { discoverCfg.devtype = ATSHA204A; break; } } for ( i = 0; i < sizeof(revs108) / 4; i++ ) { if ( memcmp( &packet.info[1], &revs108[i], 4) == 0 ) { discoverCfg.devtype = ATECC108A; break; } } atca_delay_ms(15); // now the device type is known, so update the caller's cfg array element with it head->devtype = discoverCfg.devtype; head++; } hal_i2c_idle(discoverIface); } deleteATCADevice(&device); return ATCA_SUCCESS; } /** \brief - this HAL implementation assumes you've included the ASF I2C libraries in your project, otherwise, the HAL layer will not compile because the ASF I2C drivers are a dependency * */ /** \brief hal_i2c_init manages requests to initialize a physical interface. it manages use counts so when an interface * has released the physical layer, it will disable the interface for some other use. * You can have multiple ATCAIFace instances using the same bus, and you can have multiple ATCAIFace instances on * multiple i2c buses, so hal_i2c_init manages these things and ATCAIFace is abstracted from the physical details. */ /** \brief initialize an I2C interface using given config * \param[in] hal - opaque ptr to HAL data * \param[in] cfg - interface configuration */ ATCA_STATUS hal_i2c_init(void *hal, ATCAIfaceCfg *cfg) { int bus = cfg->atcai2c.bus; // 0-based logical bus number ATCAHAL_t *phal = (ATCAHAL_t*)hal; if ( i2c_bus_ref_ct == 0 ) // power up state, no i2c buses will have been used for ( int i = 0; i < MAX_I2C_BUSES; i++ ) i2c_hal_data[i] = NULL; i2c_bus_ref_ct++; // total across buses if ( bus >= 0 && bus < MAX_I2C_BUSES ) { // if this is the first time this bus and interface has been created, do the physical work of enabling it if ( i2c_hal_data[bus] == NULL ) { i2c_hal_data[bus] = malloc( sizeof(ATCAI2CMaster_t) ); i2c_hal_data[bus]->ref_ct = 1; // buses are shared, this is the first instance config_i2c_master.speed = cfg->atcai2c.baud; config_i2c_master.chip = 0x50; config_i2c_master.speed_reg = TWI_BAUD(sysclk_get_cpu_hz(), cfg->atcai2c.baud); switch (bus) { case 0: i2c_hal_data[bus]->i2c_master_instance = &TWIC; break; //case 1: i2c_hal_data[bus]->i2c_master_instance = &TWID; break; // for XMEGA-A1 case 2: i2c_hal_data[bus]->i2c_master_instance = &TWIE; break; //case 3: i2c_hal_data[bus]->i2c_master_instance = &TWIF; break; // for XMEGA-A1 } twi_master_setup((i2c_hal_data[bus]->i2c_master_instance), &config_i2c_master); // store this for use during the release phase i2c_hal_data[bus]->bus_index = bus; twi_master_enable(i2c_hal_data[bus]->i2c_master_instance); } else{ // otherwise, another interface already initialized the bus, so this interface will share it and any different // cfg parameters will be ignored...first one to initialize this sets the configuration i2c_hal_data[bus]->ref_ct++; } phal->hal_data = i2c_hal_data[bus]; return ATCA_SUCCESS; } return ATCA_COMM_FAIL; }
ATCA_STATUS hal_i2c_send(ATCAIface iface, uint8_t *txdata, int txlength) { ATCAIfaceCfg *cfg = atgetifacecfg(iface); int bus = cfg->atcai2c.bus; twi_package_t packet = { .addr_length = 0, // TWI slave memory address data size .chip = cfg->atcai2c.slave_address >> 1, // TWI slave bus address .buffer = txdata, // transfer data source buffer .length = txlength, // transfer data size (bytes) }; // for this implementation of I2C with CryptoAuth chips, txdata is assumed to have ATCAPacket format // other device types that don't require i/o tokens on the front end of a command need a different hal_i2c_send and wire it up instead of this one // this covers devices such as ATSHA204A and ATECCx08A that require a word address value pre-pended to the packet // txdata[0] is using _reserved byte of the ATCAPacket txdata[0] = 0x03; // insert the Word Address Value, Command token txlength++; // account for word address value byte. packet.length = txlength; if ( twi_master_write(i2c_hal_data[bus]->i2c_master_instance, &packet) != STATUS_OK ) return ATCA_COMM_FAIL; return ATCA_SUCCESS; } /** \brief HAL implementation of I2C receive function for ASF I2C * \param[in] iface instance * \param[in] rxdata pointer to space to receive the data * \param[in] rxlength ptr to expected number of receive bytes to request * \return ATCA_STATUS */ ATCA_STATUS hal_i2c_receive( ATCAIface iface, uint8_t *rxdata, uint16_t *rxlength) { ATCAIfaceCfg *cfg = atgetifacecfg(iface); int bus = cfg->atcai2c.bus; int retries = cfg->rx_retries; int status = !STATUS_OK; twi_package_t packet = { .addr_length = 0, // TWI slave memory address data size .chip = cfg->atcai2c.slave_address >> 1, // TWI slave bus address .buffer = rxdata, // transfer data source buffer .length = *rxlength, // transfer data size (bytes) }; while ( retries-- > 0 && status != STATUS_OK ) status = twi_master_read(i2c_hal_data[bus]->i2c_master_instance, &packet); if ( status != STATUS_OK ) return ATCA_COMM_FAIL; return ATCA_SUCCESS; } /** \brief method to change the bus speec of I2C * \param[in] iface interface on which to change bus speed * \param[in] speed baud rate (typically 100000 or 400000) */ void change_i2c_speed( ATCAIface iface, uint32_t speed ) { ATCAIfaceCfg *cfg = atgetifacecfg(iface); int bus = cfg->atcai2c.bus; config_i2c_master.speed = speed; config_i2c_master.speed_reg = TWI_BAUD(sysclk_get_cpu_hz(), speed); twi_master_disable(i2c_hal_data[bus]->i2c_master_instance); switch (bus) { case 0: i2c_hal_data[bus]->i2c_master_instance = &TWIC; break; case 2: i2c_hal_data[bus]->i2c_master_instance = &TWIE; break; } twi_master_setup((i2c_hal_data[bus]->i2c_master_instance), &config_i2c_master); twi_master_enable(i2c_hal_data[bus]->i2c_master_instance); }