Tool/software: Code Composer Studio
Hi!
I would like to ask your help on the following issue:
Using as base project: “Simple_peripheral_cc2640r2lp_oad_offchip” , I am developing on CC2640R2 Launchpad. It was working perfectly.
I had developed a custom hardware, which electronic circuit build-up differ from the Launchpad’s one, because I need to provide the CC2640R2 power supply from 1.8V externally.
For the hardware re-design, I used CC2650EM-4XS-Ext_Reg_2_0_0 as reference project.
The bim_oad_offchip_cc2640r2lp_app is part of the Simple_peripheral. But the bim_oad_offchip_cc2640r2lp_app contains a ccfg.c file, where it is possible configure the DC/DC converter.
Based on my knowledge, the simple_peripheral_cc2640r2lp_oad_offchip_app project does not has a ccfg configuration, due to the fact that the bootloader set these parameters. Am I correct ?
I had been modified the ccfg.c file in the Bim project as described in swra486a.pdf. Based on the custom hardware, I had written a custom board.h file, and I had uploaded the previously tested and working software on the custom hardware.
My ccfg.c DC/DC settings:
//##################################### // Alternative DC/DC settings //##################################### #ifndef SET_CCFG_SIZE_AND_DIS_FLAGS_DIS_ALT_DCDC_SETTING // #define SET_CCFG_SIZE_AND_DIS_FLAGS_DIS_ALT_DCDC_SETTING 0x0 // Alternative DC/DC setting enabled #define SET_CCFG_SIZE_AND_DIS_FLAGS_DIS_ALT_DCDC_SETTING 0x1 // Alternative DC/DC setting disabled #endif #ifndef SET_CCFG_MODE_CONF_1_ALT_DCDC_VMIN #define SET_CCFG_MODE_CONF_1_ALT_DCDC_VMIN 0x0 // 2.25V #endif #ifndef SET_CCFG_MODE_CONF_1_ALT_DCDC_DITHER_EN #define SET_CCFG_MODE_CONF_1_ALT_DCDC_DITHER_EN 0x0 // Disable // #define SET_CCFG_MODE_CONF_1_ALT_DCDC_DITHER_EN 0x1 // Enable #endif #ifndef SET_CCFG_MODE_CONF_1_ALT_DCDC_IPEAK #define SET_CCFG_MODE_CONF_1_ALT_DCDC_IPEAK 0x2 // 39mA #endif //##################################### // Power settings //##################################### #ifndef SET_CCFG_MODE_CONF_VDDR_TRIM_SLEEP_DELTA #define SET_CCFG_MODE_CONF_VDDR_TRIM_SLEEP_DELTA 0xF // Signed delta value +1 to apply to the VDDR_TRIM_SLEEP target (0xF=-1=default=no compensation) #endif #ifndef SET_CCFG_MODE_CONF_DCDC_RECHARGE // #define SET_CCFG_MODE_CONF_DCDC_RECHARGE 0x0 // Use the DC/DC during recharge in powerdown #define SET_CCFG_MODE_CONF_DCDC_RECHARGE 0x1 // Do not use the DC/DC during recharge in powerdown #endif #ifndef SET_CCFG_MODE_CONF_DCDC_ACTIVE // #define SET_CCFG_MODE_CONF_DCDC_ACTIVE 0x0 // Use the DC/DC during active mode #define SET_CCFG_MODE_CONF_DCDC_ACTIVE 0x1 // Do not use the DC/DC during active mode #endif #ifndef SET_CCFG_MODE_CONF_VDDS_BOD_LEVEL // #define SET_CCFG_MODE_CONF_VDDS_BOD_LEVEL 0x0 // VDDS BOD level is 2.0V #define SET_CCFG_MODE_CONF_VDDS_BOD_LEVEL 0x1 // VDDS BOD level is 1.8V (or 1.65V for external regulator mode) #endif #ifndef SET_CCFG_MODE_CONF_VDDR_CAP #define SET_CCFG_MODE_CONF_VDDR_CAP 0x3A // Unsigned 8-bit integer representing the min. decoupling capacitance on VDDR in units of 100nF #endif #ifndef SET_CCFG_MODE_CONF_VDDR_TRIM_SLEEP_TC #define SET_CCFG_MODE_CONF_VDDR_TRIM_SLEEP_TC 0x1 // Temperature compensation on VDDR sleep trim disabled (default) // #define SET_CCFG_MODE_CONF_VDDR_TRIM_SLEEP_TC 0x0 // Temperature compensation on VDDR sleep trim enabled #endif
The software is running, and UART monitoring confirms all OK. Sensors are operating, the BLE waiting for connection in “Advertising” mode.
BUT ERROR: the device can be discovered by other devices, but cannot be connected, cannot retrieve the service list, cannot communicate. Device name "N/A" or "Unknown" in BLE monitor. The BLE packet sniffer list the advertising packages, but there are tons of "FCE ERROR" (50%).
I was suspect the 32Khz oscillator instability, but I had tried 3 different type of oscillator. I had also measured the oscillator signal with an oscilloscope, but it always showed perfectly stable.
After this, based on the documentation of swra499b.pdf I had switch to internal RC oscillator, but the problem still exist.
The RF front-end design identical with the Launchpad’s one. The power supply is stable 1.8V.
In my opinion the error is in correlation with the power supply build-up design, but I cannot identify what else should be modified apart form those I listed above, to ensure, that the BLE communication work perfectly.
Many thanks for your concrete help and support,
Laszlo
Simplelink CC2640R2 SDK 1.50.00.58 | CCS 7.3.0.00019
