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lpc176x: Permit flashing to addresses other than CONFIG_APPLICATION_START

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Allow flash_write_block() to write to arbitrary addresses as long as
the flash address starts at a 256 byte boundary.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2022-07-28 12:57:17 -04:00 committed by Eric Callahan
parent fb50570994
commit b45941967d
1 changed files with 7 additions and 4 deletions
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11
src/lpc176x/flash.c
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@ -19,7 +19,7 @@
typedef void (*IAP)(uint32_t *, uint32_t *);
static uint8_t iap_buf[IAP_BUF_MIN_SIZE] __aligned(4);
static uint32_t next_address = CONFIG_APPLICATION_START;
static uint32_t next_address;
static uint32_t page_write_count;
// Return the flash sector index for the page at the given address
@ -131,9 +131,12 @@ flash_write_block(uint32_t block_address, uint32_t *data)
// Not a block aligned address
return -1;
if (CONFIG_BLOCK_SIZE < IAP_BUF_MIN_SIZE) {
if (block_address != next_address)
// out of order request
return -2;
if (block_address != next_address) {
if ((block_address | next_address) & (IAP_BUF_MIN_SIZE - 1))
// out of order request
return -2;
next_address = block_address;
}
uint32_t buf_idx = block_address & (IAP_BUF_MIN_SIZE - 1);
memcpy(&iap_buf[buf_idx], data, CONFIG_BLOCK_SIZE);
if (buf_idx == IAP_BUF_MIN_SIZE - CONFIG_BLOCK_SIZE) {