此时,通过设置时钟配置寄存器(Clk_CFG)可以调整同步时钟SPICLK的频率,从而改变数据传输率。SPI有3个可用时钟源:内部时钟源PCLK,外部时钟源Epll clock和USBCLK。其同步时钟计算公式为: 同步时钟频率=f/[2×(预分频值+1)] 其中f是所选时钟源的频率,预分频值的取值范围是0～255。若取f=400 MHz,则同步时钟频率最...
CLOCK_AttachClk(lpc_obj[i].clock_attach_id); lpc_obj[i].parent.parent.user_data = &lpc_obj[i]; lpc_obj[i].sem = rt_sem_create("sem_spi", 0, RT_IPC_FLAG_FIFO); lpspi_master_config_t masterConfig; LPSPI_MasterGetDefaultConfig(&masterConfig); masterConfig.baudRate = 12 * 1000...
Question 1: In the datasheet section 2.1 you can read that slew rate disabled and normal drive strength, what is the meaning of disabled (fast or slow) and normal (high or low) ? Question 2: I'am using PTD1 pin as SPI clock line. The drive strength enable control can not be change...
此时,通过设置时钟配置寄存器(Clk_CFG)可以调整同步时钟SPICLK的频率,从而改变数据传输率。SPI有3个可用时钟源:内部时钟源PCLK,外部时钟源Epll clock和USBCLK。其同步时钟计算公式为: 同步时钟频率=f/[2×(预分频值+1)] 其中f是所选时钟源的频率,预分频值的取值范围是0～255。若取f=400 MHz,则同步时钟频率最...
RCC_APB2_Peripheral_Clock_Enable(SPI_MASTER_PERIPH | SPI_SLAVE_PERIPH | RCC_APB2_PERIPH_AFIO);...
{structrt_spi_busparent;LPSPI_Type *LPSPIx;clock_attach_id_tclock_attach_id;clock_div_name_tclock_div_name;clock_name_tclock_name;DMA_Type *DMAx;uint8_ttx_dma_chl;uint8_trx_dma_chl;edma_handle_tdma_tx_handle;edma_handle_tdma_rx_handle;dma_request_source_ttx_dma_request;dma_request_...
SCK (Serial Clock):时钟信号线,用于通讯数据同步。它由通讯主机产生,决定了通讯的速率,不同的设备支持的最高时钟频率不一样,如STM32的SPI时钟频率最大为fpclk/2,两个设备之间通讯时,通讯速率受限于低速设备。 MOSI (Master Output, Slave Input):主设备输出/从设备输入引脚。主机的数据从这条信号线输出,从机...
The maximum baud rate is 2 MBaud. By applying an active slave select signal at SS the TLE8209-2SA is selected by the SPI-master. SI is the data input (Slave In), SO the data output (Slave Out). Via SCK (Serial Clock Input) the SPI-clock is provided by the master. In case of...
When using fast mode (clock = 400 kHz), the maximum DAC update rate is limited to 10 kSPS. Using fast mode plus (clock = 1 MHz), the maximum DAC update rate is limited to 25 kSPS. When a stop condition is received, the DAC4390x-Q1 device releases the I2C bus and awaits a new...
In this condition L6460 sets all bridges outputs in high impedance, powers down all regulators (including system regulators and charge pump) and disables almost all its circuits including internal clock reducing as much as possible power consumption. The only circuits that remain active are: – V3...