diff options
Diffstat (limited to 'libloragw/src/loragw_fpga.c')
| -rw-r--r-- | libloragw/src/loragw_fpga.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/libloragw/src/loragw_fpga.c b/libloragw/src/loragw_fpga.c index ce1c9c6..63c6d3b 100644 --- a/libloragw/src/loragw_fpga.c +++ b/libloragw/src/loragw_fpga.c @@ -175,9 +175,14 @@ int lgw_fpga_configure(uint32_t tx_notch_freq) { DEBUG_MSG("ERROR: Failed to configure FPGA polarity\n"); return LGW_REG_ERROR; } - /* Set Attenuator mode to be used for the full card*/ - if (fpga_version == 32) { - lgw_fpga_reg_w(LGW_FPGA_RF_ATTN_MODE, 0); + } + + /* Set Attenuator mode to 1 to allow it to use it*/ + if (fpga_supports_attenuator()) { + x = lgw_fpga_reg_w(LGW_FPGA_RF_ATTN_MODE, 1); + if (x != LGW_REG_SUCCESS) { + DEBUG_MSG("ERROR: Failed to configure Attenuator mode\n"); + return LGW_REG_ERROR; } } @@ -361,17 +366,21 @@ int lgw_fpga_reg_rb(uint16_t register_id, uint8_t *data, uint16_t size) { /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ -int lgw_set_attenuation(float attenuation) { - int i; - int32_t val; - if (attenuation > 31.75 || attenuation < 0) { +int lgw_set_attenuation(uint8_t *attn) { + if (*attn > 127) { return LGW_HAL_ERROR; } - i = lgw_fpga_reg_w(LGW_FPGA_RF_ATTN_VALUE, (uint8_t)(attenuation * LGW_RF_ATTN_CONV_CONST)); + int i; + /* The max value allowed for 7 bits of a register */ + uint8_t max_attn = 127; + + /* Shifting the float value to apply get the adjusted integer */ + uint8_t shifted_attn = (uint8_t)(*attn * LGW_RF_ATTN_CONV_CONST); - i = lgw_fpga_reg_r(LGW_FPGA_RF_ATTN_VALUE, &val); + /* The attenuator value is bit 0-6 of the register hence must be limited to 127 */ + uint8_t reg_attn = max_attn ^ ((shifted_attn ^ max_attn) & -(shifted_attn < max_attn)); + i = lgw_fpga_reg_w(LGW_FPGA_RF_ATTN_VALUE, reg_attn); if (i == LGW_REG_SUCCESS) { - DEBUG_PRINTF("INFO: Attenuator set to %u \n", (uint8_t)val); return LGW_HAL_SUCCESS; } else { return LGW_HAL_ERROR; |