C++ (Cpp) i2c_wait_end_rx_transferの例

コード例 #1

ファイル: i2c_api.c プロジェクト: jasongaunt/mbed

int i2c_slave_read(i2c_t *obj, char *data, int length) {
    uint8_t dummy_read, count;
    uint8_t * ptr;
    
    // set rx mode
    obj->i2c->C1 &= ~I2C_C1_TX_MASK;
    
    // first dummy read
    dummy_read = obj->i2c->D;
    if(i2c_wait_end_rx_transfer(obj)) {
        return 0;
    }
    
    // read address
    dummy_read = obj->i2c->D;
    if(i2c_wait_end_rx_transfer(obj)) {
        return 0;
    }
    
    // read (length - 1) bytes
    for (count = 0; count < (length - 1); count++) {
        data[count] = obj->i2c->D;
        if(i2c_wait_end_rx_transfer(obj)) {
            return 0;
        }
    }

    // read last byte
    ptr = (length == 0) ? &dummy_read : (uint8_t *)&data[count];
    *ptr = obj->i2c->D;
    
    return (length) ? (count + 1) : 0;
}

コード例 #2

ファイル: i2c_api.c プロジェクト: goconnor/mbed

int i2c_slave_read(i2c_t *obj, char *data, int length) {
    uint8_t dummy_read;
    uint8_t *ptr;
    int count;

    // set rx mode
    i2c_hal_set_direction(obj->instance, kI2CTransmit);

    // first dummy read
    dummy_read = i2c_hal_read(obj->instance);
    if (i2c_wait_end_rx_transfer(obj))
        return 0;

    // read address
    dummy_read = i2c_hal_read(obj->instance);
    if (i2c_wait_end_rx_transfer(obj))
        return 0;

    // read (length - 1) bytes
    for (count = 0; count < (length - 1); count++) {
        data[count] = i2c_hal_read(obj->instance);
        if (i2c_wait_end_rx_transfer(obj))
            return count;
    }

    // read last byte
    ptr = (length == 0) ? &dummy_read : (uint8_t *)&data[count];
    *ptr = i2c_hal_read(obj->instance);

    return (length) ? (count + 1) : 0;
}

コード例 #3

ファイル: i2c_api.c プロジェクト: 1deus/tmk_keyboard

int i2c_slave_read(i2c_t *obj, char *data, int length) {
    uint8_t dummy_read;
    uint8_t *ptr;
    int count;
    uint32_t i2c_addrs[] = I2C_BASE_ADDRS;
    // set rx mode
    I2C_HAL_SetDirMode(i2c_addrs[obj->instance], kI2CSend);

    // first dummy read
    dummy_read = I2C_HAL_ReadByte(i2c_addrs[obj->instance]);
    if (i2c_wait_end_rx_transfer(obj))
        return 0;

    // read address
    dummy_read = I2C_HAL_ReadByte(i2c_addrs[obj->instance]);
    if (i2c_wait_end_rx_transfer(obj))
        return 0;

    // read (length - 1) bytes
    for (count = 0; count < (length - 1); count++) {
        data[count] = I2C_HAL_ReadByte(i2c_addrs[obj->instance]);
        if (i2c_wait_end_rx_transfer(obj))
            return count;
    }

    // read last byte
    ptr = (length == 0) ? &dummy_read : (uint8_t *)&data[count];
    *ptr = I2C_HAL_ReadByte(i2c_addrs[obj->instance]);

    return (length) ? (count + 1) : 0;
}

コード例 #4

ファイル: i2c_api.c プロジェクト: jasongaunt/mbed

static int i2c_do_read(i2c_t *obj, char * data, int last) {
    if (last)
        i2c_send_nack(obj);
    else
        i2c_send_ack(obj);

    *data = (obj->i2c->D & 0xFF);

    // start rx transfer and wait the end of the transfer
    return i2c_wait_end_rx_transfer(obj);
}

コード例 #5

ファイル: i2c_api.c プロジェクト: goconnor/mbed

static int i2c_do_read(i2c_t *obj, char * data, int last) {
    if (last) {
        i2c_hal_send_nak(obj->instance);
    } else {
        i2c_hal_send_ack(obj->instance);
    }

    *data = (i2c_hal_read(obj->instance) & 0xFF);

    // start rx transfer and wait the end of the transfer
    return i2c_wait_end_rx_transfer(obj);
}

コード例 #6

ファイル: i2c_api.c プロジェクト: 1deus/tmk_keyboard

static int i2c_do_read(i2c_t *obj, char * data, int last) {
    uint32_t i2c_addrs[] = I2C_BASE_ADDRS;
    if (last) {
        I2C_HAL_SendNak(i2c_addrs[obj->instance]);
    } else {
        I2C_HAL_SendAck(i2c_addrs[obj->instance]);
    }

    *data = (I2C_HAL_ReadByte(i2c_addrs[obj->instance]) & 0xFF);

    // start rx transfer and wait the end of the transfer
    return i2c_wait_end_rx_transfer(obj);
}

コード例 #7

ファイル: i2c_api.c プロジェクト: goconnor/mbed

int i2c_slave_write(i2c_t *obj, const char *data, int length) {
    int i, count = 0;

    // set tx mode
    i2c_hal_set_direction(obj->instance, kI2CTransmit);

    for (i = 0; i < length; i++) {
        if (i2c_do_write(obj, data[count++]) == 2)
            return i;
    }

    // set rx mode
    i2c_hal_set_direction(obj->instance, kI2CReceive);

    // dummy rx transfer needed
    // otherwise the master cannot generate a stop bit
    i2c_hal_read(obj->instance);
    if (i2c_wait_end_rx_transfer(obj) == 2)
        return count;

    return count;
}

コード例 #8

ファイル: i2c_api.c プロジェクト: 1deus/tmk_keyboard

int i2c_slave_write(i2c_t *obj, const char *data, int length) {
    int i, count = 0;
    uint32_t i2c_addrs[] = I2C_BASE_ADDRS;

    // set tx mode
    I2C_HAL_SetDirMode(i2c_addrs[obj->instance], kI2CSend);

    for (i = 0; i < length; i++) {
        if (i2c_do_write(obj, data[count++]) == 2)
            return i;
    }

    // set rx mode
    I2C_HAL_SetDirMode(i2c_addrs[obj->instance], kI2CReceive);

    // dummy rx transfer needed
    // otherwise the master cannot generate a stop bit
    I2C_HAL_ReadByte(i2c_addrs[obj->instance]);
    if (i2c_wait_end_rx_transfer(obj) == 2)
        return count;

    return count;
}

コード例 #9

ファイル: i2c_api.c プロジェクト: jasongaunt/mbed

int i2c_slave_write(i2c_t *obj, const char *data, int length) {
    uint32_t i, count = 0;
    
    // set tx mode
    obj->i2c->C1 |= I2C_C1_TX_MASK;
    
    for (i = 0; i < length; i++) {
        if(i2c_do_write(obj, data[count++]) == 2) {
            return 0;
        }
    }
    
    // set rx mode
    obj->i2c->C1 &= ~I2C_C1_TX_MASK;
    
    // dummy rx transfer needed
    // otherwise the master cannot generate a stop bit
    obj->i2c->D;
    if(i2c_wait_end_rx_transfer(obj) == 2) {
        return 0;
    }
    
    return count;
}