mpm: Fixed a plethora of SPI-related issues

13 files changed, 102 insertions, 53 deletions

diff --git a/host/lib/usrp/common/lmk04828.cpp b/host/lib/usrp/common/lmk04828.cpp
index 6a0f5fd14..9a9657ac8 100644
--- a/host/lib/usrp/common/lmk04828.cpp
+++ b/host/lib/usrp/common/lmk04828.cpp
@@ -31,11 +31,13 @@ lmk04828_iface::lmk04828_iface(write_fn_t write_fn, read_fn_t read_fn) : _write_
 void lmk04828_iface::verify_chip_id()
 {
     // Check ID Device Type, ID Prod, and ID Maskrev registers
-    uint8_t id_device_type = _read_fn(3);
+    uint8_t id_device_type = get_chip_id();
+
+    std::cout << "LMK device ID: " << int(id_device_type) << std::endl;
 
     // assert(id_device_type == 6);
     if (id_device_type != 6){
-        printf("id_device_type is not 6!");
+        std::cout << "id_device_type is not 6!" << std::endl;
     }
 }
 
@@ -48,15 +50,15 @@ void lmk04828_iface::init()
 {
     // Configure the LMK to start producing clocks
 // TODO: Convert to use ic_reg_map fields once values are finalized/working
-    std::vector<uint32_t> write_addrs = {
+    std::vector<uint16_t> write_addrs = {
         0x000000,0x000000,0x000002,0x000149,0x00014A,0x000100,0x000101,0x000103,0x000104,0x000105,0x000106,0x000107,0x000120,0x000121,0x000123,0x000124,0x000125,0x000126,0x000127,0x000130,0x000131,0x000133,0x000134,0x000135,0x000136,0x000137,0x000128,0x000129,0x00012B,0x00012C,0x00012D,0x00012E,0x00012F,0x000108,0x000109,0x00010B,0x00010C,0x00010D,0x00010E,0x00010F,0x000118,0x000119,0x00011B,0x00011C,0x00011D,0x00011E,0x00011F,0x000138,0x00013F,0x000140,0x000144,0x000146,0x000147,0x00014B,0x00014C,0x000153,0x000154,0x000155,0x000156,0x000157,0x000158,0x000159,0x00015A,0x00015B,0x00015E,0x000160,0x000161,0x000162,0x000163,0x000164,0x000165,0x000166,0x000167,0x000168,0x00016E,0x000173,0x000169,0x00016C,0x00016D};
 
-    std::vector<uint32_t> write_data = {
+    std::vector<uint8_t> write_data = {
         0x000090,0x000010,0x000000,0x000040,0x000033,0x000078,0x000055,0x000000,0x000020,0x000000,0x0000F1,0x000055,0x000078,0x000055,0x000000,0x000020,0x000000,0x0000F1,0x000055,0x000078,0x000055,0x000000,0x000020,0x000000,0x0000F1,0x000005,0x000078,0x000055,0x000000,0x000000,0x000000,0x0000F0,0x000050,0x00007E,0x000055,0x000000,0x000000,0x000000,0x0000F0,0x000055,0x000078,0x000055,0x000000,0x000020,0x000000,0x0000F1,0x000000,0x000030,0x000009,0x000000,0x000000,0x000010,0x00001A,0x00000D,0x0000F6,0x000000,0x000001,0x000000,0x00000A,0x000000,0x000001,0x000000,0x00007D,0x0000DB,0x000000,0x000000,0x000004,0x0000A0,0x000000,0x000000,0x000019,0x000000,0x000000,0x000019,0x00006B,0x000000,0x000051,0x000000,0x000000};
 
     std::vector<uint32_t> writes {};
     for (size_t index = 0; index < write_addrs.size(); index++) {
-        writes.push_back((write_addrs[index] << 11) | write_data[index]); 
+        writes.push_back((write_addrs[index] << 8) | write_data[index]); 
     }
 
     std::cout << "LMK Initialization writes" << std::endl;
@@ -66,12 +68,14 @@ void lmk04828_iface::init()
     std::cout << std::endl;
 
     _write_fn(writes);
+
+    verify_chip_id();
 }
 
-void lmk04828_iface::send_sysref_pulse()
+void lmk04828_iface::enable_sysref_pulse()
 {
     // Configure the LMK to issue a single SysRef pulse each time SYNC is asserted
-     
+
     // TODO: Convert to use ic reg map fields once functional
     // Addr 0x139 Value 0x2
     // Addr 0x144 Value 0xFF
diff --git a/host/lib/usrp/common/lmk04828.hpp b/host/lib/usrp/common/lmk04828.hpp
index 80a7a8917..36266bbfe 100644
--- a/host/lib/usrp/common/lmk04828.hpp
+++ b/host/lib/usrp/common/lmk04828.hpp
@@ -46,12 +46,16 @@ public:
 
     void init();
 
-    void send_sysref_pulse();
+    /*! Enable SYSREF pulses
+     *
+     * After calling this, triggering the sync pin will emit a SYSREF pulse.
+     */
+    void enable_sysref_pulse();
 
 private:
     // use IC Reg Map once values stabilize
 //    lmk04828_regs_t _regs;
-    
+
     write_fn_t _write_fn;
     read_fn_t _read_fn;
 };
diff --git a/mpm/include/mpm/ad937x/ad937x_ctrl.hpp b/mpm/include/mpm/ad937x/ad937x_ctrl.hpp
index 837d617c9..995f4c379 100644
--- a/mpm/include/mpm/ad937x/ad937x_ctrl.hpp
+++ b/mpm/include/mpm/ad937x/ad937x_ctrl.hpp
@@ -177,7 +177,7 @@ void export_mykonos(){
         .def("get_multichip_sync_status", &ad937x_ctrl::get_multichip_sync_status)
         .def("get_framer_status", &ad937x_ctrl::get_framer_status)
         .def("get_deframer_status", &ad937x_ctrl::get_deframer_status)
-        .def("get_deframer_irq", &ad937x_ctrl::get_deframer_irq)
+        //.def("get_deframer_irq", &ad937x_ctrl::get_deframer_irq)
         .def("get_ilas_config_match", &ad937x_ctrl::get_ilas_config_match)
         .def("enable_jesd_loopback", &ad937x_ctrl::enable_jesd_loopback)
         .def("get_rf_freq_range", &ad937x_ctrl::get_rf_freq_range)
diff --git a/mpm/include/mpm/ad937x/adi_ctrl.hpp b/mpm/include/mpm/ad937x/adi_ctrl.hpp
index 616f59ea4..34d9d891c 100644
--- a/mpm/include/mpm/ad937x/adi_ctrl.hpp
+++ b/mpm/include/mpm/ad937x/adi_ctrl.hpp
@@ -27,12 +27,12 @@ struct ad9371_spiSettings_t
         return reinterpret_cast<ad9371_spiSettings_t *>(sps);
     }
 
-    explicit ad9371_spiSettings_t(uhd::spi_iface::sptr uhd_iface);
+    explicit ad9371_spiSettings_t(uhd::spi_iface* uhd_iface);
 
     // spiSetting_t MUST be the first data member so that the
-    // reintrepret_cast in make() works
+    // reinterpret_cast in make() works
     spiSettings_t spi_settings;
-    uhd::spi_iface::sptr spi_iface;
+    uhd::spi_iface* spi_iface;
     std::chrono::time_point<std::chrono::steady_clock> timeout_start;
     std::chrono::microseconds timeout_duration;
 };
diff --git a/mpm/include/mpm/lmk04828/lmk04828_spi_iface.hpp b/mpm/include/mpm/lmk04828/lmk04828_spi_iface.hpp
index af068c9e0..4fe124298 100644
--- a/mpm/include/mpm/lmk04828/lmk04828_spi_iface.hpp
+++ b/mpm/include/mpm/lmk04828/lmk04828_spi_iface.hpp
@@ -35,7 +35,7 @@ void export_lmk(){
         .def("verify_chip_id", &lmk04828_iface::verify_chip_id)
         .def("get_chip_id", &lmk04828_iface::get_chip_id)
         .def("init", &lmk04828_iface::init)
-        .def("send_sysref_pulse", &lmk04828_iface::send_sysref_pulse)
+        .def("enable_sysref_pulse", &lmk04828_iface::enable_sysref_pulse)
    ;
 }
 //        .def("make", &lmk04828_iface::make)
diff --git a/mpm/lib/lmk04828/lmk04828_spi_iface.cpp b/mpm/lib/lmk04828/lmk04828_spi_iface.cpp
index d0ae26063..1251f4535 100644
--- a/mpm/lib/lmk04828/lmk04828_spi_iface.cpp
+++ b/mpm/lib/lmk04828/lmk04828_spi_iface.cpp
@@ -30,7 +30,7 @@ uint8_t lmk04828_spi_iface::spi_read(uint32_t addr) {
         // r/w[23] 0[22:21] addr[20:8] data[7:0] = 24 bits
         uint32_t transaction = 0;
         transaction |= LMK_SPI_READ_FLAG << LMK_SPI_READ_FLAG_OFFSET;
-        transaction &= LMK_SPI_RESERVED_FIELD_MASK;
+        //transaction &= LMK_SPI_RESERVED_FIELD_MASK;
         transaction |= addr << LMK_SPI_READ_ADDR_OFFSET;
 
         uint32_t data = _spi_iface->read_spi(DEFAULT_SLAVE, config, transaction, LMK_SPI_NUM_BITS);
diff --git a/mpm/lib/mykonos/ad937x_ctrl.cpp b/mpm/lib/mykonos/ad937x_ctrl.cpp
index dc4682598..d6360dad6 100644
--- a/mpm/lib/mykonos/ad937x_ctrl.cpp
+++ b/mpm/lib/mykonos/ad937x_ctrl.cpp
@@ -22,6 +22,7 @@
 #include <sstream>
 #include <set>
 #include <functional>
+#include <iostream>
 
 using namespace mpm::ad937x::device;
 
@@ -123,9 +124,10 @@ public:
         uhd::spi_iface::sptr iface,
         mpm::ad937x::gpio::gain_pins_t gain_pins) :
         spi_mutex(spi_mutex),
-        device(iface, gain_pins)
+        device(iface.get(), gain_pins),
+        _iface(iface)
     {
-
+        /* nop */
     }
 
     virtual void begin_initialization()
@@ -379,6 +381,7 @@ public:
 private:
     ad937x_device device;
     std::shared_ptr<std::mutex> spi_mutex;
+    uhd::spi_iface::sptr _iface;
 };
 
 ad937x_ctrl::sptr ad937x_ctrl::make(std::shared_ptr<std::mutex> spi_mutex, uhd::spi_iface::sptr iface, mpm::ad937x::gpio::gain_pins_t gain_pins)
diff --git a/mpm/lib/mykonos/ad937x_device.cpp b/mpm/lib/mykonos/ad937x_device.cpp
index 663acbf30..138e4e165 100644
--- a/mpm/lib/mykonos/ad937x_device.cpp
+++ b/mpm/lib/mykonos/ad937x_device.cpp
@@ -20,6 +20,8 @@
 #include "adi/mykonos_gpio.h"
 #include "adi/mykonos_debug/mykonos_dbgjesd.h"
 
+#include <boost/format.hpp>
+
 #include <functional>
 #include <iostream>
 
@@ -112,16 +114,16 @@ void ad937x_device::_call_gpio_api_function(std::function<mykonosGpioErr_t()> fu
     }
 }
 
-void ad937x_device::_call_debug_api_function(std::function<mykonosDbgErr_t()> func)
-{
-    auto error = func();
-    if (error != MYKONOS_ERR_DBG_OK)
-    {
-        std::cout << getDbgJesdMykonosErrorMessage(error);
-        // TODO: make UHD exception
-        //throw std::exception(getMykonosErrorMessage(error));
-    }
-}
+//void ad937x_device::_call_debug_api_function(std::function<mykonosDbgErr_t()> func)
+//{
+    //auto error = func();
+    //if (error != MYKONOS_ERR_DBG_OK)
+    //{
+        //std::cout << getDbgJesdMykonosErrorMessage(error);
+        //// TODO: make UHD exception
+        ////throw std::exception(getMykonosErrorMessage(error));
+    //}
+//}
 
 // TODO: delete this comment closer to release
 /*
@@ -193,14 +195,17 @@ void ad937x_device::begin_initialization()
 {
     // TODO: make this reset actually do something (implement CMB_HardReset or replace)
     _call_api_function(std::bind(MYKONOS_resetDevice, mykonos_config.device));
+    _call_api_function(std::bind(MYKONOS_initialize, mykonos_config.device));
 
-    if (get_product_id() != AD9371_PRODUCT_ID)
+    uint8_t product_id = get_product_id();
+    if (product_id != AD9371_PRODUCT_ID)
     {
-        throw runtime_error("AD9371 product ID does not match expected ID!");
+        throw runtime_error(str(
+            boost::format("AD9371 product ID does not match expected ID! Read: %X Expected: %X")
+            % int(product_id) % int(AD9371_PRODUCT_ID)
+        ));
     }
 
-    _call_api_function(std::bind(MYKONOS_initialize, mykonos_config.device));
-
     if (!get_pll_lock_status(pll_t::CLK_SYNTH))
     {
         throw runtime_error("AD937x CLK_SYNTH PLL failed to lock in initialize()");
@@ -267,7 +272,7 @@ uint8_t ad937x_device::get_deframer_status()
 uint8_t ad937x_device::get_deframer_irq()
 {
     uint8_t irq_status = 0;
-    _call_debug_api_function(std::bind(MYKONOS_deframerGetIrq, mykonos_config.device, &irq_status));
+    //_call_debug_api_function(std::bind(MYKONOS_deframerGetIrq, mykonos_config.device, &irq_status));
     return irq_status;
 }
 
@@ -284,11 +289,17 @@ void ad937x_device::enable_jesd_loopback(uint8_t enable)
     _call_api_function(std::bind(MYKONOS_setRxFramerDataSource, mykonos_config.device, enable));
 }
 
-ad937x_device::ad937x_device(spi_iface::sptr iface, gain_pins_t gain_pins) :
+ad937x_device::ad937x_device(spi_iface* iface, gain_pins_t gain_pins) :
     full_spi_settings(iface),
     mykonos_config(&full_spi_settings.spi_settings),
     gain_ctrl(gain_pins)
 {
+    std::cout << "full spi settings addr " << &full_spi_settings << std::endl;
+    iface->read_spi(0, uhd::spi_config_t::EDGE_RISE, 400, 24);
+    std::cout << "adi spi settings addr " << &(full_spi_settings.spi_settings) << std::endl;
+    std::cout << "iface addr " << std::hex << iface << std::dec << std::endl;
+
+    std::cout << "myk dev addr " << std::hex << mykonos_config.device->spiSettings << std::dec << std::endl;
 
 }
 
diff --git a/mpm/lib/mykonos/ad937x_device.hpp b/mpm/lib/mykonos/ad937x_device.hpp
index 1b21a5a04..729912adf 100644
--- a/mpm/lib/mykonos/ad937x_device.hpp
+++ b/mpm/lib/mykonos/ad937x_device.hpp
@@ -39,7 +39,7 @@ public:
     enum class gain_mode_t { MANUAL, AUTOMATIC, HYBRID };
     enum class pll_t {CLK_SYNTH, RX_SYNTH, TX_SYNTH, SNIFF_SYNTH, CALPLL_SDM};
 
-    ad937x_device(uhd::spi_iface::sptr iface, mpm::ad937x::gpio::gain_pins_t gain_pins);
+    ad937x_device(uhd::spi_iface* iface, mpm::ad937x::gpio::gain_pins_t gain_pins);
 
     void begin_initialization();
     void finish_initialization();
@@ -96,7 +96,7 @@ private:
 
     void _call_api_function(std::function<mykonosErr_t()> func);
     void _call_gpio_api_function(std::function<mykonosGpioErr_t()> func);
-    void _call_debug_api_function(std::function<mykonosDbgErr_t()> func);
+    //void _call_debug_api_function(std::function<mykonosDbgErr_t()> func);
 
     static uint8_t _convert_rx_gain(double gain);
     static uint16_t _convert_tx_gain(double gain);
diff --git a/mpm/lib/mykonos/adi_ctrl.cpp b/mpm/lib/mykonos/adi_ctrl.cpp
index c7fcceaa9..9a5f73607 100644
--- a/mpm/lib/mykonos/adi_ctrl.cpp
+++ b/mpm/lib/mykonos/adi_ctrl.cpp
@@ -24,7 +24,9 @@
 #include <chrono>
 #include <thread>
 
-ad9371_spiSettings_t::ad9371_spiSettings_t(uhd::spi_iface::sptr uhd_iface) :
+static const uint32_t MYKONOS_READ_BIT = (1 << 23);
+
+ad9371_spiSettings_t::ad9371_spiSettings_t(uhd::spi_iface* uhd_iface) :
     spi_iface(uhd_iface)
 {
     spi_settings.chipSelectIndex = 0;       // set later
@@ -98,7 +100,7 @@ commonErr_t CMB_SPIWriteByte(spiSettings_t *spiSettings, uint16_t addr, uint8_t
         mpm_spi->spi_iface->write_spi(spiSettings->chipSelectIndex, config, data_word, 24);
         return COMMONERR_OK;
     } catch (const std::exception &e) {
-        // ... error handling ...
+        std::cout << "AAAAAAAAAAAAH" << std::endl;
     }
     return COMMONERR_FAILED;
 }
@@ -124,7 +126,7 @@ commonErr_t CMB_SPIWriteBytes(spiSettings_t *spiSettings, uint16_t *addr, uint8_
         }
         return COMMONERR_OK;
     } catch (const std::exception &e) {
-        // ... error handling ...
+        std::cout << "AAAAAAAAAAAAH" << std::endl;
     }
     return COMMONERR_FAILED;
 }
@@ -141,13 +143,14 @@ commonErr_t CMB_SPIReadByte (spiSettings_t *spiSettings, uint16_t addr, uint8_t
 
     ad9371_spiSettings_t *mpm_spi = ad9371_spiSettings_t::make(spiSettings);
     uhd::spi_config_t config(_get_edge(*spiSettings));
-    uint32_t data_word = (0) | (addr << 8);
+    uint32_t read_word = MYKONOS_READ_BIT | (addr << 8);
 
     try {
         *readdata = static_cast<uint8_t>(
-            mpm_spi->spi_iface->read_spi(spiSettings->chipSelectIndex, config, data_word, 24));
+            mpm_spi->spi_iface->read_spi(spiSettings->chipSelectIndex, config, read_word, 24));
         return COMMONERR_OK;
     } catch (const std::exception &e) {
+        std::cout << "AAAAAAAAAAAAH READ" << std::endl;
         // ... error handling ...
     }
     return COMMONERR_FAILED;
@@ -170,6 +173,7 @@ commonErr_t CMB_SPIWriteField(
         mpm_spi->spi_iface->write_spi(spiSettings->chipSelectIndex, config, write_word, 24);
         return COMMONERR_OK;
     } catch (const std::exception &e) {
+        std::cout << "AAAAAAAAAAAAH WRITE FIELD" << std::endl;
         // ... error handling ...
     }
     return COMMONERR_FAILED;
@@ -184,13 +188,14 @@ commonErr_t CMB_SPIReadField(
 ) {
     ad9371_spiSettings_t *mpm_spi = ad9371_spiSettings_t::make(spiSettings);
     uhd::spi_config_t config(_get_edge(*spiSettings));
-    uint32_t read_word = (0) | (addr << 8);
+    uint32_t read_word = MYKONOS_READ_BIT | (addr << 8);
 
     try {
         uint32_t value = mpm_spi->spi_iface->read_spi(spiSettings->chipSelectIndex, config, read_word, 24);
         *field_val = static_cast<uint8_t>((value & mask) >> start_bit);
         return COMMONERR_OK;
     } catch (const std::exception &e) {
+        std::cout << "AAAAAAAAAAAAH READ FIELD" << std::endl;
         /* ... error handling ... */
     }
     return COMMONERR_FAILED;
@@ -250,7 +255,7 @@ commonErr_t CMB_closeLog(void)
 
 commonErr_t CMB_writeToLog(ADI_LOGLEVEL level, uint8_t deviceIndex, uint32_t errorCode, const char *comment)
 {
-    std::cout << level << " " << errorCode << " " << comment << std::endl;
+    std::cout << "[CMB_writeToLog] level==" << level << " errorCode==" << errorCode << " " << comment << std::endl;
     return COMMONERR_OK;
 }
 commonErr_t CMB_flushLog(void)
diff --git a/mpm/lib/mykonos/config/ad937x_config_t.cpp b/mpm/lib/mykonos/config/ad937x_config_t.cpp
index 941690d06..eac294299 100644
--- a/mpm/lib/mykonos/config/ad937x_config_t.cpp
+++ b/mpm/lib/mykonos/config/ad937x_config_t.cpp
@@ -24,6 +24,8 @@ ad937x_config_t::ad937x_config_t(spiSettings_t* sps)
 
     _assign_default_configuration();
     _init_pointers();
+
+    device = &_device;
 }
 
 void ad937x_config_t::_assign_default_configuration()
@@ -70,7 +72,6 @@ void ad937x_config_t::_assign_default_configuration()
 
 void ad937x_config_t::_init_pointers()
 {
-    _device.spiSettings = &_spiSettings;
     _device.rx = &_rx;
     _device.tx = &_tx;
     _device.obsRx = &_obsRx;
diff --git a/mpm/lib/mykonos/config/ad937x_config_t.hpp b/mpm/lib/mykonos/config/ad937x_config_t.hpp
index 5663517c7..94d14c733 100644
--- a/mpm/lib/mykonos/config/ad937x_config_t.hpp
+++ b/mpm/lib/mykonos/config/ad937x_config_t.hpp
@@ -28,7 +28,8 @@ class ad937x_config_t  : public boost::noncopyable
     // a user could technically modify the pointers in the structs, but we have no way of preventing that
 public:
     ad937x_config_t(spiSettings_t* sps);
-    mykonosDevice_t * const device = &_device;
+    //mykonosDevice_t * const device = &_device;
+    mykonosDevice_t * device;
 
     ad937x_fir rx_fir_config;
     ad937x_fir tx_fir_config;
@@ -40,7 +41,6 @@ private:
 
     // in general, this organization stinks
     // TODO: group and make more sense of these fields and pointers
-    spiSettings_t _spiSettings;
     mykonosRxSettings_t _rx;
     mykonosTxSettings_t _tx;
     mykonosObsRxSettings_t _obsRx;
diff --git a/mpm/lib/spi/spidev_iface.cpp b/mpm/lib/spi/spidev_iface.cpp
index 7108759f8..88ee46824 100644
--- a/mpm/lib/spi/spidev_iface.cpp
+++ b/mpm/lib/spi/spidev_iface.cpp
@@ -23,6 +23,8 @@
 #include <linux/spi/spidev.h>
 #include <boost/format.hpp>
 
+#include <iostream>
+
 using namespace mpm::spi;
 
 /******************************************************************************
@@ -45,34 +47,53 @@ public:
             ));
         }
 
-        ret = ioctl(_fd, SPI_IOC_WR_MODE32, &_mode);
+        int MODE = 3;
+        ret = ioctl(_fd, SPI_IOC_WR_MODE32, &MODE);
         if (ret == -1) {
-            throw std::runtime_error("Could not set spidev mode");
+            throw std::runtime_error(str(
+                    boost::format("Could not set spidev mode to %X for spidev %s")
+                    % uint16_t(_mode) % device
+            ));
         }
 
         ret = ioctl(_fd, SPI_IOC_RD_MODE32, &_mode);
         if (ret == -1) {
-            throw std::runtime_error("Could not get spidev mode");
+            throw std::runtime_error(str(
+                    boost::format("Could not get spidev mode for spidev %s")
+                    % device
+            ));
         }
 
         ret = ioctl(_fd, SPI_IOC_WR_BITS_PER_WORD, &_bits);
         if (ret == -1) {
-            throw std::runtime_error("Could not set spidev bits per word");
+            throw std::runtime_error(str(
+                    boost::format("Could not set spidev bits per word to %d for spidev %s")
+                    % uint16_t(_bits) % device
+            ));
         }
 
         ret = ioctl(_fd, SPI_IOC_RD_BITS_PER_WORD, &_bits);
         if (ret == -1) {
-            throw std::runtime_error("Could not get spidev bits per word");
+            throw std::runtime_error(str(
+                    boost::format("Could not get spidev bits per word for spidev %s")
+                    % device
+            ));
         }
 
         ret = ioctl(_fd, SPI_IOC_WR_MAX_SPEED_HZ, &_speed);
         if (ret == -1) {
-            throw std::runtime_error("Could not set spidev max speed");
+            throw std::runtime_error(str(
+                    boost::format("Could not set spidev max speed to %d for spidev %s")
+                    % _speed % device
+            ));
         }
 
         ret = ioctl(_fd, SPI_IOC_RD_MAX_SPEED_HZ, &_speed);
         if (ret == -1) {
-            throw std::runtime_error("Could not get spidev max speed");
+            throw std::runtime_error(str(
+                    boost::format("Could not get spidev max speed for spidev %s")
+                    % device
+            ));
         }
     }
 
@@ -138,7 +159,7 @@ public:
 
 private:
     int _fd;
-    uint8_t _mode = SPI_CPHA | SPI_CPOL;
+    uint32_t _mode = SPI_CPHA | SPI_CPOL;
     uint32_t _speed = 2000000;
     uint8_t _bits = 8;
     uint16_t _delay = 0;