Posted on June 10, 2013 at 23:19i used timer2 and it's clock source from APB1 and Prescaler value for APB1 is 4 it's mean's APB1 work at 42mhz ''168mhz/4 '' becuase the maximum frequency is 42mhz for APB1. i searched in internet and so...
Posted on June 01, 2013 at 14:45the problem is when i make Delay(1000); it must delay 1second but it make delay about 3second not 1second . it was 3time slower than the real time volatile uint32_t msTicks; void SysTick_Handler(void) { ms...
Posted on May 30, 2013 at 00:14i have problem with st link swd in discovery board. the usb device have problem in this picture. i think it need usb driver for discovery baord.
Posted on May 10, 2013 at 00:34what is this 1ul and 2ul and 3ul examble RCC->AHB1ENR |= ((1UL << 0) ); /* Enable GPIOA clock * GPIOA->MODER &= ~((3UL << 2*0) ); /* PA.0 is input */ what is the new ...
Posted on May 10, 2013 at 15:28 RCC->AHB1ENR |= 0x00000001; GPIOA->MODER &= 0xFFFFFFFC; // mask off low two bits ie ~0x00000003 thank you very much but how you convert this (3UL << 2*0) and this (1UL << 0) to number !
Posted on January 20, 2013 at 19:37thank you for your help and full support . when i add an external nor flash. can i make some function execute from external nor memory . and some function execute from internal flash memory.
Posted on January 15, 2013 at 20:50i see some data sheet about nor flash and sram. but all very slow .compared with internal flash and sram . if i use two sram and two nor flash it will increase speed and capacity. or will increase capacity only
