SPI System clock Peroid: 75,77平台 7.519ns , 89平台round 10 ns Write\Read : static int xxxx_spi_write_cmd(struct spi_device *spi, unsigned char reg_addr, unsigned char write_val) { int error; u8 rx[32] = {0}; TX_BUF[0] = reg_addr; TX_BUF[1] = write_val; struct spi_mess...
(RESOLUTION == 12) encoderPosition = encoderPosition >> 2; //on a 12-bit encoder, the lower two bits will always be zero Serial.print(encoderPosition, DEC); //print the position in decimal format Serial.write('\n'); } else //position is bad { Serial.print("Encoder position error....
首先说明一点,capture strobe = latch = read = sample,都是表示数据采样,数据有效的时刻。相位,对应着数据采样是在第几个边沿(edge),是第一个边沿还是第二个边沿,0对应着第一个边沿,1对应着第二个边沿。 对于: CPHA=0,表示第一个边沿: 对于CPOL=0,idle时候的是低电平,第一个边沿就是从低变到高,所以是...
首先说明一点,capture strobe = latch = read = sample,都是表示数据采样,数据有效的时刻。相位,对应着数据采样是在第几个边沿(edge),是第一个边沿还是第二个边沿,0对应着第一个边沿,1对应着第二个边沿。 对于: CPHA=0,表示第一个边沿: 对于CPOL=0,idle时候的是低电平,第一个边沿就是从低变到高,所以是...
谢谢 uint8_t spi_ReadWrite(uint8_t wData){ UINT8 spi_u8Tmp=0;// SPI_CS_OnOff(1);...
void){uint8_t txackbytes = SPI_MASTER_SYNBYTE, rxackbytes = 0x00;do{/* Call SPI write ...
dynamic device discovery; some are even write-only or read-only. SPI is widely used by microcontrollers to talk with sensors, eeprom and flash memory, codecs and various other controller chips, analog todigital(and d-to-a)converters, and more. ...
Code Sample 06/21/2023 Browse codeDownload ZIP Shows how to use theWindows.Devices.Spinamespace to allow apps to communicate with Serial Peripheral Interface (SPI) devices on a Windows IoT (Internet of Things) device. Note:This sample is part of a large collection of UWP feature samples. Yo...
* device, or else a negative error code. Callable only from * contexts that can sleep. */ static inline ssize_t spi_w8r8(struct spi_device *spi, u8 cmd) { ssize_t status; u8 result; status = spi_write_then_read(spi, &cmd, 1, &result, 1); ...
(*read_status)(spi_flash_host_driver_t *driver, uint8_t *out_sr),//读取FLASH状态方法 esp_err_t (*set_write_protect)(spi_flash_host_driver_t *driver, bool wp),//关闭写保护方法 void (*program_page)(spi_flash_host_driver_t *driver, const void *buffer, uint32_t address, uint32...