Espressif ESP32-S2 - Page 1493

Chapter 4. API Guides
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.text //Text section definition
MOVE R1, 1 // R1 = 1
MOVE R2, Addr1 // R2 = Addr1
STL R1, R2, offs // MEM[R2 + 0] = R1
// MEM[Addr1 + 0] will be 32'hxxxx0001
3:
MOVE R1, 1 // R1 = 1
STL R1, R2, 0x12,1 // MEM[R2+0x12] 0xxxxx4001
STH –Store data to the high 16 bits of 32-bits memory
Syntax STH Rsrc, Rdst, offset, Label
Operands
• Rsrc –Register R[0..3], holds the 16-bit value to store
• Rdst –Register R[0..3], address of the destination, in 32-bit words
• Offset –11-bit signed value, offset in bytes
• Label –2-bit user defined unsigned value
Cycles 4 cycles to execute, 4 cycles to fetch next instruction
Description The instruction stores the 16-bit value of Rsrc to the high half-word of memory with address
Rdst+offset:
Mem[Rdst + offset / 4]{31:16} = {Rsrc[15:0]}
Mem[Rdst + offset / 4]{31:16} = {Label[1:0],Rsrc[13:0]}
Examples:
1: STH R1, R2, 0x12 //MEM[R2+0x12][31:16] = R1
2: .data //Data section definition
Addr1: .word 123 // Define label Addr1 16 bit
.set offs, 0x00 // Define constant offs
.text //Text section definition
MOVE R1, 1 // R1 = 1
MOVE R2, Addr1 // R2 = Addr1
STH R1, R2, offs // MEM[R2 + 0] = R1
// MEM[Addr1 + 0] will be 32'h0001xxxx
3:
MOVE R1, 1 // R1 = 1
STH R1, R2, 0x12, 1 //MEM[R2+0x12] 0x4001xxxx
STO –Set offset value for auto increment operation
Syntax STO offset
Operands
• Offset –11-bit signed value, offset in bytes
Cycles 4 cycles to execute, 4 cycles to fetch next instruction
Description The instruction set 16-bit value to the offset register:
offset = value/ 4
Examples:
1: STO 0x12 // Offset = 0x12/4
2: .data //Data section definition
Addr1: .word 123 // Define label Addr1 16 bit
.set offs, 0x00 // Define constant offs
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