touch & sd working

sd_card.h

@@ -0,0 +1,130 @@
+/*
+ * SD Card Driver for SPI Interface
+ * Shares SPI bus with ST7796 display
+ * 
+ * Supports standard SD/SDHC cards using SPI mode
+ */
+
+#ifndef SD_CARD_H
+#define SD_CARD_H
+
+#include "pico/stdlib.h"
+#include "hardware/spi.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// SD Card Commands (SPI mode)
+#define SD_CMD0     0   // GO_IDLE_STATE
+#define SD_CMD8     8   // SEND_IF_COND
+#define SD_CMD9     9   // SEND_CSD
+#define SD_CMD10    10  // SEND_CID
+#define SD_CMD12    12  // STOP_TRANSMISSION
+#define SD_CMD13    13  // SEND_STATUS
+#define SD_CMD16    16  // SET_BLOCKLEN
+#define SD_CMD17    17  // READ_SINGLE_BLOCK
+#define SD_CMD18    18  // READ_MULTIPLE_BLOCK
+#define SD_CMD24    24  // WRITE_BLOCK
+#define SD_CMD25    25  // WRITE_MULTIPLE_BLOCK
+#define SD_CMD55    55  // APP_CMD
+#define SD_CMD58    58  // READ_OCR
+#define SD_ACMD41   41  // SD_SEND_OP_COND (APP_CMD)
+
+// SD Card Response Tokens
+#define SD_R1_IDLE_STATE    0x01
+#define SD_R1_READY         0x00
+#define SD_START_TOKEN      0xFE
+#define SD_DATA_ACCEPTED    0x05
+
+// SD Card Types
+#define SD_CARD_TYPE_SD1    1
+#define SD_CARD_TYPE_SD2    2
+#define SD_CARD_TYPE_SDHC   3
+
+// Block size
+#define SD_BLOCK_SIZE       512
+
+// Configuration structure
+typedef struct {
+    spi_inst_t *spi;
+    uint gpio_cs;
+    uint gpio_miso;  // Should match display MISO
+    uint gpio_mosi;  // Should match display MOSI
+    uint gpio_sck;   // Should match display SCK
+} sd_card_config_t;
+
+// Card information structure
+typedef struct {
+    uint8_t type;
+    uint32_t capacity_mb;
+    bool initialized;
+} sd_card_info_t;
+
+/**
+ * Initialize the SD card
+ * @param config Configuration structure
+ * @return true if successful, false otherwise
+ */
+bool sd_card_init(const sd_card_config_t *config);
+
+/**
+ * Get card information
+ * @param info Pointer to info structure to fill
+ * @return true if successful, false otherwise
+ */
+bool sd_card_get_info(sd_card_info_t *info);
+
+/**
+ * Read a single block from the SD card
+ * @param block_addr Block address (in blocks, not bytes)
+ * @param buffer Buffer to read into (must be at least 512 bytes)
+ * @return true if successful, false otherwise
+ */
+bool sd_card_read_block(uint32_t block_addr, uint8_t *buffer);
+
+/**
+ * Read multiple blocks from the SD card
+ * @param block_addr Starting block address
+ * @param num_blocks Number of blocks to read
+ * @param buffer Buffer to read into (must be at least num_blocks * 512 bytes)
+ * @return true if successful, false otherwise
+ */
+bool sd_card_read_blocks(uint32_t block_addr, uint32_t num_blocks, uint8_t *buffer);
+
+/**
+ * Write a single block to the SD card
+ * @param block_addr Block address (in blocks, not bytes)
+ * @param buffer Buffer containing data to write (must be 512 bytes)
+ * @return true if successful, false otherwise
+ */
+bool sd_card_write_block(uint32_t block_addr, const uint8_t *buffer);
+
+/**
+ * Write multiple blocks to the SD card
+ * @param block_addr Starting block address
+ * @param num_blocks Number of blocks to write
+ * @param buffer Buffer containing data to write (must be num_blocks * 512 bytes)
+ * @return true if successful, false otherwise
+ */
+bool sd_card_write_blocks(uint32_t block_addr, uint32_t num_blocks, const uint8_t *buffer);
+
+/**
+ * Erase blocks on the SD card
+ * @param start_block Starting block address
+ * @param end_block Ending block address
+ * @return true if successful, false otherwise
+ */
+bool sd_card_erase_blocks(uint32_t start_block, uint32_t end_block);
+
+/**
+ * Check if card is present and initialized
+ * @return true if card is ready, false otherwise
+ */
+bool sd_card_is_ready(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // SD_CARD_H