FM25V10驱动控制程序 ，Linux 系统下已调试完成

#include "fm25v10.h" static const char *device = "/dev/spidev0.0"; static uint32_t mode; static uint8_t bits = 8; static uint32_t speed = 500000; static uint16_t delay; static int fd; static void pabort(const char *s) { perror(s); abort(); } static void hex_dump(const void *src, size_t length, size_t line_size, char *prefix) { int i = 0; const unsigned char *address = src; const unsigned char *line = address; unsigned char c; printf("%s | ", prefix); while (length-- > 0) { printf("%02X ", *address++); if (!(++i % line_size) || (length == 0 && i % line_size)) { if (length == 0) { while (i++ % line_size) printf("__ "); } printf(" |"); while (line < address) { c = *line++; printf("%c", (c < 32 || c > 126) ? '.' : c); } printf("|\n"); if (length > 0) printf("%s | ", prefix); } } } uint8_t FM25V10_Init(void) { int ret = 0; fd = open(device, O_RDWR); if (fd < 0) pabort("can't open device"); /* * spi mode */ ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode); if (ret == -1) pabort("can't set spi mode"); ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode); if (ret == -1) pabort("can't get spi mode"); /* * bits per word */ ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits); if (ret == -1) pabort("can't set bits per word"); ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits); if (ret == -1) pabort("can't get bits per word"); /* * max speed hz */ ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed); if (ret == -1) pabort("can't set max speed hz"); ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed); if (ret == -1) pabort("can't get max speed hz"); printf("spi mode: 0x%x\n", mode); printf("bits per word: %d\n", bits); printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000); return 1; } void FM25V10_RID() { int ret; uint8_t tx[1] = {0}; uint8_t rx[10] = {0}; tx[0] = RDID; struct spi_ioc_transfer tr = { .tx_buf = (unsigned long)tx, .rx_buf = (unsigned long)rx, .len = sizeof(rx), .delay_usecs = delay, .speed_hz = speed, .bits_per_word = bits, }; ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr); if (ret < 1) pabort("can't send spi message"); hex_dump(rx, sizeof(rx), 32, "RX"); } int main() { FM25V10_Init(); //read device ID FM25V10_RID(); }