About cyril_praz

If we look the picture below we can see that the last sample retrieved from the FIFO is not  read completely.   I have investigated and see that for the function bma400_get_regs the number of dummy byte is added to the actual number of byte we want to read:     int8_t bma400_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint8_t len, const struct bma400_dev *dev) { int8_t rslt; uint16_t index; uint16_t temp_len = len + dev->dummy_byte; uint8_t temp_buff[temp_len]; ... /* Read the data from the reg_addr */ rslt = dev->read(dev->dev_id, reg_addr, temp_buff, temp_len); ... }     but this is not done into the function read_fifo:     static int8_t read_fifo(const struct bma400_fifo_data *fifo, const struct bma400_dev *dev) { int8_t rslt; uint8_t reg_data; uint8_t fifo_addr = BMA400_FIFO_DATA_ADDR; ... rslt = dev->read(dev->dev_id, fifo_addr, fifo->data, fifo->length); ... } int8_t bma400_get_fifo_data(struct bma400_fifo_data *fifo, const struct bma400_dev *dev) { int8_t rslt; uint8_t data; uint16_t fifo_byte_cnt = 0; uint16_t user_fifo_len = 0; ... /* Reading the FIFO length */ rslt = get_fifo_length(&fifo_byte_cnt, dev); if (rslt == BMA400_OK) { ... user_fifo_len = fifo->length; if (fifo->length > fifo_byte_cnt) { /* Handling case where user requests * more data than available in FIFO */ fifo->length = fifo_byte_cnt; } ... rslt = read_fifo(fifo, dev); } ... }     by adding the number of dummy bytes into fifo_byte_cnt the problem was fixed.   This issue is present on the commit: https://github.com/BoschSensortec/BMA400-API/commit/f87f5ec1b91db7a9f7fb55e777d2a3d8ab99d7db   ... View more