- #Missing software packs in keil 5 for nrf52 how to
- #Missing software packs in keil 5 for nrf52 32 bit
- #Missing software packs in keil 5 for nrf52 code
Among other things the ESPR tracks whether or not the processor is in thumb mode state. INVSTATE - Indicates the processor has tried to execute an instruction with an invalidĮxecution Program Status Register ( EPSR) value.If this fault flag is set, it means a reserved EXC_RETURN value was used on exception exit. EXC_RETURN is the value branched to upon return from an exception. INVPC - Indicates an integrity check failure on EXC_RETURN.
#Missing software packs in keil 5 for nrf52 code
One common case where this fault happens is when code is compiled to use the Floating Point extension ( -mfloat-abi=hard -mfpu=fpv4-sp-d16) but the coprocessor was not enabled on boot. NOCP - Indicates that a Cortex-M coprocessor instruction was issued but the coprocessor wasĭisabled or not present.With the exception of Cortex-M0 MCUs, whether or not unaligned accesses below 4 bytes generate a fault is also configurable. Unaligned multiple word accesses, such as accessing a uint64_t that is not 8-byte aligned, will always generate this fault. UNALIGNED - Indicates an unaligned access operation occurred.DIVBYZERO - Indicates a divide instruction was executed where the denominator was zero.This register is a 2 byte register which summarizes any faults that are not related to memory access failures, such as executing invalid instructions or trying to enter invalid states. UsageFault Status Register (UFSR) - 0圎000ED2A Fields are only cleared by a system reset or by writing a 1 to them. NOTE: If multiple faults have occurred, bits related to several faults may be set. MemManage Status Register (MMFSR) - print/x *(uint8_t *)0圎000ED28.BusFault Status Register (BFSR) - print/x *(uint8_t *)0圎000ED29.UsageFault Status Register (UFSR) - print/x *(uint16_t *)0圎000ED2A.For example, in GDB it would look something like this:
#Missing software packs in keil 5 for nrf52 32 bit
The register can be accessed via a 32 bit read at 0圎000ED28 or each register can be read individually. The register is comprised of three different status registers – UsageFault, BusFault & MemManage Fault Status Registers: This 32 bit register contains a summary of the fault(s) which took place and resulted in the exception. Relevant Status Registers Configurable Fault Status Registers (CFSR) - 0圎000ED28
#Missing software packs in keil 5 for nrf52 how to
NOTE: If you already know the state to inspect when a fault occurs, you may want to skip ahead to the section about how to automate the analysis. If you are trying to debug a Cortex-M0, you can skip ahead to the next section where we discuss how to recover the core register state and instruction being executed at the time of the exception.