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Diffstat (limited to 'digital/avr/modules/trace/trace.c')
-rw-r--r--digital/avr/modules/trace/trace.c97
1 files changed, 56 insertions, 41 deletions
diff --git a/digital/avr/modules/trace/trace.c b/digital/avr/modules/trace/trace.c
index ac113f17..4fa01af8 100644
--- a/digital/avr/modules/trace/trace.c
+++ b/digital/avr/modules/trace/trace.c
@@ -32,36 +32,45 @@
#define TRACE_ARGS_MAX 6
#define TRACE_MAX_ARGS (TRACE_ARGS_MAX * TRACE_ARGS_MAX)
+enum trace_status_t
+{
+ TRACE_STATUS_OFF,
+ TRACE_STATUS_ON
+};
+
struct trace_t
{
/** Flash status. */
- uint8_t flash_status;
+ trace_status_t status;
+ /** Flash start address */
+ const uint32_t addr_start;
/** Flash address. */
- uint32_t flash_addr;
+ uint32_t addr;
/** Flash next sector */
- uint32_t flash_next_sector;
+ uint32_t next_sector;
};
typedef struct trace_t trace_t;
static trace_t trace_global;
-
-/** Verify the stat of the next sector.
- * If the next sector is not empty it shall send an erase command on the
- * sector of the flash memory.
+/** Erase the next sector on the Flash memory.
*/
static void
-trace_next_sector_prepare (void)
+trace_erase_next_sector (void)
{
- uint32_t addr_next;
- uint8_t data;
- if (trace_global.flash_status)
+ /* If the flash is enable and the start sector is not reached yet erase
+ * the sector. */
+ if (trace_global.status
+ && (flash_read (trace_global.next_sector) != 0xFF))
{
- addr_next = FLASH_PAGE(trace_global.flash_addr) + FLASH_PAGE_SIZE;
- data = flash_read (addr_next);
-
- if (data != 0XFF)
- flash_erase (FLASH_ERASE_4K, addr_next);
+ if (trace_global.next_sector != trace_global.addr_start)
+ {
+ /* Flash page size is equal to 4k. */
+ flash_erase (FLASH_ERASE_4K, trace_global.next_sector);
+ }
+ else
+ /* Disable the flash. */
+ trace_global.status = TRACE_STATUS_OFF;
}
}
@@ -91,27 +100,29 @@ trace_print_arg_4(uint32_t arg)
void
trace_init (void)
{
- uint8_t i;
- trace_global.flash_status = flash_init ();
+ int8_t i;
+ trace_global.status = flash_init ();
/* Get the first sector to write. */
- if (trace_global.flash_status)
+ if (trace_global.status)
{
- trace_global.flash_addr = flash_first_sector();
- trace_global.flash_next_sector =
- FLASH_PAGE (trace_global.flash_addr + FLASH_PAGE_SIZE);
+ trace_global.addr = flash_first_sector();
+ *((uint32_t *) &trace_global.addr_start) =
+ FLASH_PAGE(trace_global.addr);
+ trace_global.next_sector =
+ FLASH_PAGE (trace_global.addr + FLASH_PAGE_SIZE);
- /* If the next sector is not empty erase it. */
- trace_next_sector_prepare ();
+ /* If the next sector is the first one in the memory erase it. */
+ trace_erase_next_sector ();
/* Store the start code. */
- for (i = 0; i < 4; i ++)
- {
- flash_write (trace_global.flash_addr,
- v32_to_v8(TRACE_CODE_START, i));
- trace_global.flash_addr =
- FLASH_ADDRESS_INC(trace_global.flash_addr);
- }
+ for (i = 24; i >= 0; i -= 8)
+ {
+ flash_write (trace_global.addr,
+ TRACE_CODE_START >> i);
+ trace_global.addr =
+ FLASH_ADDRESS_INC(trace_global.addr);
+ }
}
}
@@ -119,24 +130,28 @@ void
trace_print (uint8_t arg)
{
/* Store the arg on flash */
- if (trace_global.flash_status)
+ if (trace_global.status)
{
- flash_write (trace_global.flash_addr, arg);
- trace_global.flash_addr = FLASH_ADDRESS_INC(trace_global.flash_addr);
+ uint32_t curr_sector;
+ flash_write (trace_global.addr, arg);
+ trace_global.addr = FLASH_ADDRESS_INC(trace_global.addr);
+
+ /* Compute the next sector address. */
+ curr_sector = trace_global.next_sector;
+ trace_global.next_sector = FLASH_PAGE (trace_global.addr +
+ FLASH_PAGE_SIZE);
+ if (curr_sector != trace_global.next_sector)
+ trace_erase_next_sector ();
}
-
- if ((trace_global.flash_next_sector - trace_global.flash_addr)
- < TRACE_MAX_ARGS)
- trace_next_sector_prepare ();
}
/** Get the current status of the trace module.
* \return 0x1 if the module is activate, 0x0 if the module is not active.
*/
-uint8_t
+trace_status_t
trace_status (void)
{
- return trace_global.flash_status;
+ return trace_global.status;
}
/** Get the current address.
@@ -145,5 +160,5 @@ trace_status (void)
uint32_t
trace_addr_current (void)
{
- return trace_global.flash_addr;
+ return trace_global.addr;
}