About pchala

pchala · 2014-06-26

Posted on June 26, 2014 at 11:40 I would like to optimize next snippet: void write16Data(u16 data) { GPIOA->BSRR = 0x00ff0000 | (u8)(data & 0xff); GPIOB->BSRR = 0x00ff0000 | (u8)(data >> 8); } Any ideas?

pchala · 2014-06-24

Posted on June 24, 2014 at 23:21 Does anyone have such issue? /* TIM3 clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); /* AFIO enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOC | RCC_APB2P...

pchala · 2013-10-04

Posted on October 04, 2013 at 11:13I have found working solution. But for me it look ugly.uint8_t command = 0x55; uint16_t u16Temp = 0; u16Temp = GPIO_ReadOutputData(GPIOA)&0xFF00; u16Temp |= command; GPIO_Write(GPIOA, u16Temp); Is there better way ...

pchala · 2014-06-26

Posted on June 26, 2014 at 16:25 Got it, So ((uint8_t __IO*)&GPIOA->ODR)[0] = data.bytes[0]; will not work on stm32f100 :(

pchala · 2014-06-26

Posted on June 26, 2014 at 14:31 Indeed this function called in a loop so I will add ''inline'' But I would like to do something like: union { u16 word; u8 bytes[2]; } data; (u8 * ) portA = data.bytes[0]; (u8 * ) portB = data.byte...

pchala · 2014-06-26

Posted on June 26, 2014 at 11:16Thank you clive1, Now it is working like a charm!

pchala · 2013-10-04

Posted on October 04, 2013 at 14:52What about (*(__IO uint8_t *)((uint32_t)&(GPIOA->ODR))) = command; ?

User statistics

User Activity

Output word into two bytes on different ports. Is there a faster way?

TIM3 on STM32F100RCT only CH1 giving PWM

Parallel output of 8bits

Re: Output word into two bytes on different ports. Is there a faster way?

Re: Output word into two bytes on different ports. Is there a faster way?

Re: TIM3 on STM32F100RCT only CH1 giving PWM

Re: Parallel output of 8bits