From: Andrey Skvortsov Date: Wed, 25 May 2016 10:11:18 +0000 (+0300) Subject: flash: nor: mdr: fix verification problem with 1986VE1T or 1986VE3T X-Git-Tag: v0.10.0-rc1~145 X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=commitdiff_plain;h=5d5c9bc4ecbc8c601e77c95b40fa09ec48a79aea flash: nor: mdr: fix verification problem with 1986VE1T or 1986VE3T 1986VE1T and 1986VE3T have issue with flash acceleration engine described in their errata (issue 0007). After programming flash acceleration engine's buffer contains old data, and therefore first read data are wrong. Because of this verification after programming fails always. Recommended workaround for the issue is to flush flash accelerator's buffer. To do so it's necessary to read at least 64 bytes of flash through accelerator. Reading bytes through JTAG using default_flash_read doesn't help. It seems that reading should be done by uC itself. Change-Id: I18ef464a68ad5c5b16d3933f31ca61f8e2e7cca3 Signed-off-by: Andrey Skvortsov Reviewed-on: http://openocd.zylin.com/3509 Tested-by: jenkins Reviewed-by: Paul Fertser --- diff --git a/src/flash/nor/mdr.c b/src/flash/nor/mdr.c index 68eaf13760..374cb6f297 100644 --- a/src/flash/nor/mdr.c +++ b/src/flash/nor/mdr.c @@ -469,6 +469,13 @@ free_buffer: if (new_buffer) free(new_buffer); + /* read some bytes bytes to flush buffer in flash accelerator. + * See errata for 1986VE1T and 1986VE3. Error 0007 */ + if ((retval == ERROR_OK) && (!mdr_info->mem_type)) { + uint32_t tmp; + target_checksum_memory(bank->target, bank->base, 64, &tmp); + } + return retval; }