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authorGareth McMullin2013-03-27 14:10:07 -0700
committerGareth McMullin2013-03-27 14:10:07 -0700
commit3a70b81cce8f1e571b324453bc1e109010684647 (patch)
tree9310dacf8f7aa024f4e756052dab166589e49681 /src/stm32f4.c
parentd7a6f0165e7d26a82d6b8bb3797bb7cc8c6e44f3 (diff)
Add erase_mass command for stm32f4 devices.
Diffstat (limited to 'src/stm32f4.c')
-rw-r--r--src/stm32f4.c48
1 files changed, 45 insertions, 3 deletions
diff --git a/src/stm32f4.c b/src/stm32f4.c
index 724e8d0..09c7965 100644
--- a/src/stm32f4.c
+++ b/src/stm32f4.c
@@ -38,9 +38,11 @@
#include "target.h"
#include "command.h"
+static bool stm32f4_cmd_erase_mass(target *t);
static bool stm32f4_cmd_option(target *t, int argc, char *argv[]);
const struct command_s stm32f4_cmd_list[] = {
+ {"erase_mass", (cmd_handler)stm32f4_cmd_erase_mass, "Erase entire flash memory"},
{"option", (cmd_handler)stm32f4_cmd_option, "Manipulate option bytes"},
{NULL, NULL, NULL}
};
@@ -100,6 +102,7 @@ static const char stm32f4_xml_memory_map[] = "<?xml version=\"1.0\"?>"
#define FLASH_CR_EOPIE (1 << 24)
#define FLASH_CR_ERRIE (1 << 25)
#define FLASH_CR_STRT (1 << 16)
+#define FLASH_CR_LOCK (1 << 31)
#define FLASH_SR_BSY (1 << 16)
@@ -177,6 +180,14 @@ bool stm32f4_probe(struct target_s *target)
return false;
}
+static void stm32f4_flash_unlock(ADIv5_AP_t *ap)
+{
+ if (adiv5_ap_mem_read(ap, FLASH_CR) & FLASH_CR_LOCK) {
+ /* Enable FPEC controller access */
+ adiv5_ap_mem_write(ap, FLASH_KEYR, KEY1);
+ adiv5_ap_mem_write(ap, FLASH_KEYR, KEY2);
+ }
+}
static int stm32f4_flash_erase(struct target_s *target, uint32_t addr, int len)
{
@@ -187,9 +198,8 @@ static int stm32f4_flash_erase(struct target_s *target, uint32_t addr, int len)
addr &= 0x07FFC000;
- /* Enable FPEC controller access */
- adiv5_ap_mem_write(ap, FLASH_KEYR, KEY1);
- adiv5_ap_mem_write(ap, FLASH_KEYR, KEY2);
+ stm32f4_flash_unlock(ap);
+
while(len) {
if (addr < 0x10000) { /* Sector 0..3 */
cr = (addr >> 11);
@@ -261,6 +271,38 @@ static int stm32f4_flash_write(struct target_s *target, uint32_t dest,
return 0;
}
+static bool stm32f4_cmd_erase_mass(target *t)
+{
+ const char spinner[] = "|/-\\";
+ int spinindex = 0;
+
+ ADIv5_AP_t *ap = adiv5_target_ap(t);
+
+ gdb_out("Erasing flash... This may take a few seconds. ");
+ stm32f4_flash_unlock(ap);
+
+ /* Flash mass erase start instruction */
+ adiv5_ap_mem_write(ap, FLASH_CR, FLASH_CR_MER);
+ adiv5_ap_mem_write(ap, FLASH_CR, FLASH_CR_STRT | FLASH_CR_MER);
+
+ /* Read FLASH_SR to poll for BSY bit */
+ while(adiv5_ap_mem_read(ap, FLASH_SR) & FLASH_SR_BSY) {
+ gdb_outf("\b%c", spinner[spinindex++ % 4]);
+ if(target_check_error(t)) {
+ gdb_out("\n");
+ return false;
+ }
+ }
+ gdb_out("\n");
+
+ /* Check for error */
+ uint16_t sr = adiv5_ap_mem_read(ap, FLASH_SR);
+ if ((sr & SR_ERROR_MASK) || !(sr & SR_EOP))
+ return false;
+
+ return true;
+}
+
static bool stm32f4_option_write(target *t, uint32_t value)
{
ADIv5_AP_t *ap = adiv5_target_ap(t);