92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
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/** \file Coordinating reading and writing of SD cards.
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*/
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#include "sd.h"
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#ifdef SD
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#include "delay.h"
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#include "serial.h"
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#include "sersendf.h"
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static FATFS sdfile;
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static FRESULT result;
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/** Initialize SPI for SD card reading.
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*/
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void sd_init(void) {
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WRITE(SD_CARD_SELECT_PIN, 1);
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SET_OUTPUT(SD_CARD_SELECT_PIN);
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}
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/** Mount the SD card.
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*/
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void sd_mount(void) {
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result = pf_mount(&sdfile);
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if (result != FR_OK)
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sersendf_P(PSTR("E: SD init failed. (%su)"), result);
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}
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/** Unmount the SD card.
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This makes just sure subsequent reads to the card do nothing, instead of
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trying and failing. Not mandatory, just removing the card is fine, as well
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as inserting and mounting another one without previous unmounting.
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*/
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void sd_unmount(void) {
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pf_unmount(&sdfile);
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}
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/** List a given directory.
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\param path The path to list. Toplevel path is "/".
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A slash is added to directory names, to make it easier for users to
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recognize them.
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*/
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void sd_list(const char* path) {
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FILINFO fno;
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DIR dir;
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serial_writechar('\n');
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result = pf_opendir(&dir, path);
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if (result == FR_OK) {
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for (;;) {
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result = pf_readdir(&dir, &fno);
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if (result != FR_OK || fno.fname[0] == 0)
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break;
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serial_writestr((uint8_t *)fno.fname);
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if (fno.fattrib & AM_DIR)
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serial_writechar('/');
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serial_writechar('\n');
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delay_ms(2); // Time for sending the characters.
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}
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}
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else {
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sersendf_P(PSTR("E: failed to open dir. (%su)"), result);
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}
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}
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/** Open a file for reading.
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\param filename Name of the file to open and to read G-code from.
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Before too long this will cause the printer to read G-code from this file
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until done or until stopped by G-code coming in over the serial line.
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*/
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void sd_open(const char* filename) {
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result = pf_open(filename);
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if (result == FR_OK) {
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// To demonstrate this works, open the file and show its size.
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// Actually, the file name isn't stored, so we can't read it back :-)
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sersendf_P(PSTR("Successfully opened file with %lu bytes."), sdfile.fsize);
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}
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else {
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sersendf_P(PSTR("E: failed to open file. (%su)"), result);
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}
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}
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#endif /* SD */
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