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stm32l: workaround missing mass erase feature

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The STM32L15xx monitor does not implement the mass erase,
so we need to use the page erase feature and loop.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BUG=None
TEST=on Discovery, fill the flash with a pattern, then erase, write a
firmware image, read back the content of the flash, run the firmware.

Change-Id: Icf0e9812a5d491fea78472a0203ddbbc3e813b2f
This commit is contained in:
Vincent Palatin
2012-03-06 21:28:00 +00:00
parent d3843a5afb
commit 050bd0b1d3
1 changed files with 26 additions and 10 deletions
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36
util/stm32mon.c
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@@ -51,9 +51,10 @@ struct stm32_def {
const char *name;
uint32_t flash_start;
uint32_t flash_size;
uint32_t page_size;
} chip_defs[] = {
{0x416, "STM32L15xx", 0x08000000, 0x20000},
{0x420, "STM32F100xx", 0x08000000, 0x20000},
{0x416, "STM32L15xx", 0x08000000, 0x20000, 256},
{0x420, "STM32F100xx", 0x08000000, 0x20000, 1024},
{ 0 }
};
@@ -79,6 +80,8 @@ typedef struct {
uint8_t *data;
} payload_t;
#define MIN(a, b) ((a) < (b) ? (a) : (b))
int open_serial(const char *port)
{
int fd, res;
@@ -380,24 +383,32 @@ int command_write_mem(int fd, uint32_t address, uint32_t size, uint8_t *buffer)
return size;
}
int command_ext_erase(int fd, uint16_t count, uint16_t *pages)
int command_ext_erase(int fd, uint16_t count, uint16_t start)
{
int res;
uint16_t count_be = htons(count);
payload_t load = { 2, (uint8_t *)&count_be };
uint16_t *pages = NULL;
if (count < 0xfff0) {
/* not a special value */
/* TODO implement page-list erase */
int i;
/* not a special value : build a list of pages */
load.size = 2 * (count + 1);
pages = malloc(load.size);
if (!pages)
return -EINVAL;
return -ENOMEM;
load.data = (uint8_t *)pages;
pages[0] = htons(count - 1);
for (i = 0; i < count; i++)
pages[i+1] = htons(start + i);
}
res = send_command(fd, CMD_EXTERASE, &load, 1, NULL, 0);
if (res >= 0)
printf("Flash erased.\n");
printf("ERASE res = %d\n", res);
if (pages)
free(pages);
return res;
}
@@ -637,11 +648,16 @@ int main(int argc, char **argv)
if (flags & FLAG_UNPROTECT)
command_write_unprotect(ser);
if (flags & FLAG_ERASE)
command_ext_erase(ser, ERASE_ALL, NULL);
if (flags & FLAG_ERASE || output_filename) {
/* Mass erase is not supported on STM32L15xx */
/* command_ext_erase(ser, ERASE_ALL, 0); */
int i, page_count = chip->flash_size / chip->page_size;
for (i = 0; i < page_count; i += 128)
command_ext_erase(ser, MIN(128, page_count - i), i);
}
if (input_filename)
read_flash(ser, chip, input_filename, 0, 0);
read_flash(ser, chip, input_filename, 0, chip->flash_size);
if (output_filename)
write_flash(ser, chip, output_filename, 0);