TMS570LC4357: EMIF Access

Hello,

When reading from SDRAM, the EMIF module issues a READ command to output the starting column address and signals the SDRAM to begin the burst read operation.

When performing a double word reading, the  "ldm  r12, {r0, r1}" will be used to read two 32-bit words from address starting at r12, and store the value to r0 and r1

When performing a 32-bit word reading, the  "ldr  r2, [r12]" will be used to read one 32-bit word from address at r12, and store the data to r2

When performing a 8-bit byte reading, the  "ldrb  r2, [r12, #3]" will be used to read one byte from address at r12+3, and store the data to r2

For 16-bit half-word reading, "ldrh   r2, [r12, #2]" is used to read 16-bit data and store to r2.