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Add an extra delay after erasing a flash memory page

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Erasing a flash memory page is a relative slow operation and takes a
significant amount of time. Therefore, the ready byte is delayed, and
the standard timeout is no longer sufficient. Estimate the required
delay and wait.

Reported-by: Ralph Lembcke <mail@ralph-lembcke.de>
This commit is contained in:
Jef Driesen 2020-03-10 22:02:12 +01:00
parent d1b865d192
commit 7b9b6b4005
1 changed files with 5 additions and 1 deletions
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6
src/hw_ostc3.c
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@ -1219,12 +1219,16 @@ hw_ostc3_firmware_erase (hw_ostc3_device_t *device, unsigned int addr, unsigned
// Convert size to number of pages, rounded up.
unsigned char blocks = ((size + SZ_FIRMWARE_BLOCK - 1) / SZ_FIRMWARE_BLOCK);
// Estimate the required delay. Erasing a 4K flash memory page
// takes around 25 milliseconds.
unsigned int delay = blocks * 25;
// Erase just the needed pages.
unsigned char buffer[4];
array_uint24_be_set (buffer, addr);
buffer[3] = blocks;
return hw_ostc3_transfer (device, NULL, S_ERASE, buffer, sizeof (buffer), NULL, 0, NODELAY);
return hw_ostc3_transfer (device, NULL, S_ERASE, buffer, sizeof (buffer), NULL, 0, delay);
}
static dc_status_t