Digital signal processing
- 1. DIGITAL SIGNAL PROCESSING R.Prabhu 132912 EEE 3/22/2016 Prabhu Mike
- 2. Addressing modes • The addressing modes in TMS32050 are 1. Immediate addressing 2. Indirect addressing 3. Register addressing 4. Memory mapped register addressing 5. Direct addressing 6. circular addressing mode. 3/22/2016 Prabhu Mike
- 3. Immediate addressing • Immediate addressing is used to handle constant data. • It allows the programmer to operate on an actual value. • Depending on the length of the data, the addressing mode is referred to as long immediate or short immediate addressing mode. 3/22/2016 Prabhu Mike
- 4. Cont…. • In long immediate addressing the data is contained in a portion of the bits in a single word instruction. • EXAMPLE LD #80h, A : The instruction loads an immediate value 80h into the accumlator. 3/22/2016 Prabhu Mike
- 5. Indirect addressing • The indirect address mode uses the auxiliary register (ARs) to hold the addresses of operands in memory. • In indirect addressing, any location in the 64K- word data memory space can be accessed using a 16- bit address contained in AR. • Each auxiliary register (AR0-AR7) provide flexible and powerful indirect addressing. 3/22/2016 Prabhu Mike
- 6. • There are seven types of indirect addressing 1. Auto increment 2. Auto decrement 3. Post indexing by adding the contents 4. Post indexing by subtract the contents 5. single indirect addressing with no increment 6. single indirect addressing with no decrement 3/22/2016 Prabhu Mike
- 7. Register addressing • The register addressing mode uses operands in CPU register. • Here two memory mapped register in CPU are Block move address register (BMAR) Dynamic bit manipulation register (DBMR) 3/22/2016 Prabhu Mike
- 8. Memory mapped register addressing • Memory mapped register addressing is used to access efficiently the CPU and on chip peripheral registers. • It operates like the direct addressing. LAMM-load accumulator LMMR-load memory SAMM-store accumulator SMMR- store memory 3/22/2016 Prabhu Mike
- 9. Circular addressing mode • Circular addressing is the most complex addressing mode. • Such as convolution, correctional and FIR filtering can use circular buffer in memory to implement a sliding window. • CBSR 1, CBSR 2, CBER 1, CBER 2, CBCR 3/22/2016 Prabhu Mike