Go back to fixed size + sdengine asm tweak (improves compatibility)

Author: ahezard

dldi/source/iointerface.c

@@ -22,6 +22,7 @@
  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
+#define MAX_READ 53
 #define BYTES_PER_READ 512
 
 #ifndef NULL
@@ -136,7 +137,8 @@ bool sd_ReadSectors(sec_t sector, sec_t numSectors,void* buffer) {
 
 	//__custom_mpu_setup();
 
-	int max_reads = ((2 ^ io_dldi_data->allocatedSize) / 512) - 11;
+	//int max_reads = ((2 ^ io_dldi_data->allocatedSize) / 512) - 11;
+	int max_reads = MAX_READ;
 
 	for(int numreads =0; numreads<numSectors; numreads+=max_reads) {
 		startsector = sector+numreads;
@@ -175,7 +177,8 @@ bool sd_WriteSectors(sec_t sector, sec_t numSectors,const void* buffer) {
 
 	//__custom_mpu_setup();
 
-	int max_reads = ((2 ^ io_dldi_data->allocatedSize) / 512) - 11;
+	//int max_reads = ((2 ^ io_dldi_data->allocatedSize) / 512) - 11;
+	int max_reads = MAX_READ;
 
 	for(int numreads =0; numreads<numSectors; numreads+=max_reads) {
 		startsector = sector+numreads;

sdengine/source/sdmmc_engine_header.s

@@ -29,11 +29,7 @@ sdmmc_engine_start:
 	ldr	r1, =irqHandler			@ user IRQ handler address
 	cmp	r1, #0
 	bne	call_handler
-	mov	r1, r0
-	ldr	r4, =irqSig
-	ldr	r3, [r4]
-	add	r3, r3, #40  	@ IntrRet
-	bx	r3
+	bx  lr
 
 call_handler:
 	push    {lr}
@@ -73,10 +69,7 @@ got_handler:
 exit:	
 	pop   	{r0-r12} 
 	pop  	{lr}
-	ldr	r4, =irqSig
-	ldr	r3, [r4]
-	add	r3, r3, #40  	@ IntrRet
-	bx	r3
+	bx  lr
 
 .pool