stmhal: Change 64-bit arithmetic to 32-bit for SD card block addressing.

By measuring SD card addresses in blocks and not bytes, one can get away
with using 32-bit numbers.

This patch also uses proper atomic lock/unlock around SD card
read/write, adds SD.info() function, and gives error code for failed
read/writes.

1 files changed, 4 insertions, 2 deletions

diff --git a/stmhal/sdcard.h b/stmhal/sdcard.h
index 3a5353467..8197768de 100644
--- a/stmhal/sdcard.h
+++ b/stmhal/sdcard.h
@@ -32,7 +32,9 @@ bool sdcard_is_present(void);
 bool sdcard_power_on(void);
 void sdcard_power_off(void);
 uint64_t sdcard_get_capacity_in_bytes(void);
-bool sdcard_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks);
-bool sdcard_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks);
+
+// these return 0 on success, non-zero on error
+mp_uint_t sdcard_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks);
+mp_uint_t sdcard_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks);
 
 extern const struct _mp_obj_base_t pyb_sdcard_obj;