You mean STM32 is slow when writing data into flash? But for ISP operation through COMM port(at a high baudrate), it can be as fast as 20KBytes/s as I remember.
2009-02-27 Best Regards, Simon Qian SimonQian([email protected]) ---- www.SimonQian.com 发件人： �yvind_Harboe 发送时间： 2009-02-27 23:51:53 收件人： openocd-development 抄送： 主题： [Openocd-development] STM32 flash programming performance I've looked a bit more into STM32 flash programming performance and most of the time is spent waiting for the target to complete flash programming, i.e. it appears that it is the *target* that is slow. Could this be the case? Algorithm from flash/stm32x.c u8 stm32x_flash_write_code[] = { /* write: */ 0xDF, 0xF8, 0x24, 0x40, /* ldr r4, STM32_FLASH_CR */ 0x09, 0x4D, /* ldr r5, STM32_FLASH_SR */ 0x4F, 0xF0, 0x01, 0x03, /* mov r3, #1 */ 0x23, 0x60, /* str r3, [r4, #0] */ 0x30, 0xF8, 0x02, 0x3B, /* ldrh r3, [r0], #2 */ 0x21, 0xF8, 0x02, 0x3B, /* strh r3, [r1], #2 */ /* busy: */ 0x2B, 0x68, /* ldr r3, [r5, #0] */ 0x13, 0xF0, 0x01, 0x0F, /* tst r3, #0x01 */ 0xFB, 0xD0, /* beq busy */ 0x13, 0xF0, 0x14, 0x0F, /* tst r3, #0x14 */ 0x01, 0xD1, /* bne exit */ 0x01, 0x3A, /* subs r2, r2, #1 */ 0xED, 0xD1, /* bne write */ /* exit: */ 0xFE, 0xE7, /* b exit */ 0x10, 0x20, 0x02, 0x40, /* STM32_FLASH_CR: .word 0x40022010 */ 0x0C, 0x20, 0x02, 0x40 /* STM32_FLASH_SR: .word 0x4002200C */ }; -- �yvind Harboe PayBack incident management system Reduce costs and increase quality, free Starter Edition http://www.payback.no/index_en.html _______________________________________________ Openocd-development mailing list [email protected] https://lists.berlios.de/mailman/listinfo/openocd-development
_______________________________________________ Openocd-development mailing list [email protected] https://lists.berlios.de/mailman/listinfo/openocd-development
