2016-11-24 10:04 PM
Hi!
I have STM32F103C8 and want to configure SPI1!I wrote the program//spi1_mosi-pa7,spi1_miso-pa6,spi1_sck-pa5,spi1_nss-pa4#include ''stm32f10x.h''int main() { RCC->APB2ENR=RCC_APB2ENR_IOPAEN; RCC->APB2ENR|=RCC_APB2ENR_AFIOEN; RCC->APB2ENR|=RCC_APB2ENR_SPI1EN; GPIOA->CRL|=GPIO_CRL_CNF7_1;//mosi GPIOA->CRL|=GPIO_CRL_MODE7; GPIOA->CRL|=GPIO_CRL_CNF6_1;//miso GPIOA->CRL&=~GPIO_CRL_MODE6; GPIOA->CRL|=GPIO_CRL_CNF5_1;//sck GPIOA->CRL|=GPIO_CRL_MODE5; GPIOA->CRL|=GPIO_CRL_CNF4_1;//miso GPIOA->CRL&=~GPIO_CRL_MODE4; SPI1->CR1=SPI_CR1_BR_0|SPI_CR1_BR_1|SPI_CR1_BR_2; //SPI1->CR1=SPI_CR1_BIDIMODE; //SPI1->CR1|=SPI_CR1_BIDIOE; SPI1->CR1|=SPI_CR1_SSM; SPI1->CR1|=SPI_CR1_SSI; SPI1->CR1|=SPI_CR1_MSTR; //SPI1->CR2=SPI_CR2_SSOE; SPI1->CR1|=SPI_CR1_SPE; while (1) { SPI1->DR=0x55; while (!(SPI1->SR&SPI_SR_TXE)); } There are no impulses on pins MOSI and SCK What I did wrong? Thank You!2016-11-25 04:50 AM
Read out and post the content of relevant GPIO and SPI registers.
JW