12年前我用LPC2132时纯汇编写程序，那时好像没有见过MSP 和PSP 这两位，可能是后加的宏吧? 至于R13就是SP ，正如R15就是PC 是同一单元
toofree 发表于 2019-11-19 09:52 用发送函数读数据，读时肯定会发，发时可以不读（对读取内容不理会）。 已解决，谢谢！
BG4RFF 发表于 2019-9-23 13:43 我用103VE挂载fatfs可以的啊，不过单片机读写完就释放，挂载USB的时候单片机就不读写 ... 你是用的模拟SPI么？我看网上都是用的SDIO，但是从原理上来说应该都一样的。我用FatFS官网下载的demo和Cube生成的代码都测试了，全部都是一个现象：可以读、可以创建文件，但是就是不能正常写入文件，写操作完成后程序也能反馈FR_OK，但是在此读取的时候返回FR_DISK_ERR。 int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration----------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_TIM1_Init(); MX_USART1_UART_Init(); MX_FATFS_Init(); /* USER CODE BEGIN 2 */ FATFS fs; FIL file; FIL *fp = &file; UINT br; FRESULT res = FR_OK; BYTE buffer[200]; printf("Initialize SD Card !\r\n"); res = f_mount(&fs, "0:\\", 1); printf("f_mount(), res = %d\r\n", res); if(FR_OK == res) { res = f_open(fp, "0:\\MESSAGE.TXT", FA_OPEN_EXISTING/*FA_OPEN_ALWAYS*/ | FA_READ); printf("f_open(), res = %d\r\n", res); if(FR_OK != res) { while(1); } } if(FR_OK == res) { br = 0; res = f_lseek(fp, 0); printf("f_lseek(), res = %d\r\n", res); res = f_read(fp, buffer, sizeof(buffer) - 1, &br); printf("f_read(), res = %d, br = %d\r\n", res, br); if(FR_OK != res && br < 1) { while(1); } else { int i = 0; while(i < br) { putchar(buffer); i ++; } } } res = f_close(fp); printf("f_close(), res = %d\r\n", res); res = f_open(fp, "0:\\TEST.TXT", /*FA_CREATE_NEW |*/ FA_WRITE); printf("f_open(), res = %d\r\n", res); if(FR_OK == res) { UINT bw = 0; res = f_lseek(fp, f_size(fp)); printf("f_lseek(), res = %d\r\n", res); res = f_write(fp, "Hello world !\r\n", sizeof("Hello world !\r\n"), &bw); printf("f_write(), res = %d, bw = %d\r\n", res, bw); } f_sync(fp); f_close(fp); res = f_open(fp, "0:\\TEST.TXT", FA_OPEN_EXISTING | FA_READ); printf("f_open(), res = %d\r\n", res); res = f_lseek(fp, 0); printf("f_lseek(), res = %d\r\n", res); res = f_read(fp, buffer, sizeof(buffer) - 1, &br); printf("f_read(), res = %d, br = %d\r\n", res, br); if(FR_OK != res && br < 1) { // while(1); } else { int i = 0; while(i < br) { putchar(buffer); i ++; } } f_close(fp); f_mount(&fs, "0:\\", 0); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ }
す疯Ⅱ恒す 发表于 2018-12-1 15:41 先更新一下UG位再使能定时器看看。 不行，我在初始化和中断中都是了，调用TIM_ClearFlag(TIM1,TIM_FLAG_Update);
