diff options
Diffstat (limited to 'quantum/variable_trace.c')
| -rw-r--r-- | quantum/variable_trace.c | 110 | 
1 files changed, 110 insertions, 0 deletions
| diff --git a/quantum/variable_trace.c b/quantum/variable_trace.c new file mode 100644 index 0000000000..de580244c3 --- /dev/null +++ b/quantum/variable_trace.c @@ -0,0 +1,110 @@ +#include "variable_trace.h" +#include <stddef.h> +#include <string.h> + +#ifdef NO_PRINT +#error "You need undef NO_PRINT to use the variable trace feature" +#endif + +#ifndef CONSOLE_ENABLE +#error "The console needs to be enabled in the makefile to use the variable trace feature" +#endif + + +#define NUM_TRACED_VARIABLES 1 +#ifndef MAX_VARIABLE_TRACE_SIZE +    #define MAX_VARIABLE_TRACE_SIZE 4 +#endif + +typedef struct { +    const char* name; +    void* addr; +    unsigned size; +    const char* func; +    int line; +    uint8_t last_value[MAX_VARIABLE_TRACE_SIZE]; + +} traced_variable_t; + +static traced_variable_t traced_variables[NUM_TRACED_VARIABLES]; + +void add_traced_variable(const char* name, void* addr, unsigned size, const char* func, int line) { +    verify_traced_variables(func, line); +    if (size > MAX_VARIABLE_TRACE_SIZE) { +#if defined(__AVR__) +       xprintf("Traced variable \"%S\" exceeds the maximum size %d\n", name, size); +#else +       xprintf("Traced variable \"%s\" exceeds the maximum size %d\n", name, size); +#endif +       size = MAX_VARIABLE_TRACE_SIZE; +    } +    int index = -1; +    for (int i = 0; i < NUM_TRACED_VARIABLES; i++) { +        if (index == -1 && traced_variables[i].addr == NULL){ +            index = i; +        } +        else if (strcmp_P(name, traced_variables[i].name)==0) { +            index = i; +            break; +        } +    } + +    if (index == -1) { +        xprintf("You can only trace %d variables at the same time\n", NUM_TRACED_VARIABLES); +        return; +    } + +    traced_variable_t* t = &traced_variables[index]; +    t->name = name; +    t->addr = addr; +    t->size = size; +    t->func = func; +    t->line = line; +    memcpy(&t->last_value[0], addr, size); + +} + +void remove_traced_variable(const char* name, const char* func, int line) { +    verify_traced_variables(func, line); +    for (int i = 0; i < NUM_TRACED_VARIABLES; i++) { +        if (strcmp_P(name, traced_variables[i].name)==0) { +            traced_variables[i].name = 0; +            traced_variables[i].addr = NULL; +            break; +        } +    } +} + +void verify_traced_variables(const char* func, int line) { +    for (int i = 0; i < NUM_TRACED_VARIABLES; i++) { +        traced_variable_t* t = &traced_variables[i]; +        if (t->addr != NULL && t->name != NULL) { +            if (memcmp(t->last_value, t->addr, t->size)!=0){ +#if defined(__AVR__) +               xprintf("Traced variable \"%S\" has been modified\n", t->name); +               xprintf("Between %S:%d\n", t->func, t->line); +               xprintf("And %S:%d\n", func, line); + +#else +               xprintf("Traced variable \"%s\" has been modified\n", t->name); +               xprintf("Between %s:%d\n", t->func, t->line); +               xprintf("And %s:%d\n", func, line); +#endif +               xprintf("Previous value "); +               for (int j=0; j<t->size;j++) { +                   print_hex8(t->last_value[j]); +               } +               xprintf("\nNew value "); +               uint8_t* addr = (uint8_t*)(t->addr); +               for (int j=0; j<t->size;j++) { +                   print_hex8(addr[j]); +               } +               xprintf("\n"); +               memcpy(t->last_value, addr, t->size); +           } +        } + +        t->func = func; +        t->line = line; +    } +} | 
