[参考译文] TMS320F28379D：DSS 将栈变量传递给函数

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1423659/tms320f28379d-dss-pass-stack-variable-to-function

工具与软件：

我将使用 DSS 在 Jython 中编写单元测试脚本。

我想调用以下方法：

//
// Function to read a single Uint32 from the external flash
// - base is the SPI base address
// - endianness indicates little or big endian (TI C200 is little endian)
// - address is the byte address of the external flash to read from
// Returns the read 32-bit value
//
Uint32 SPI_read32bits(Uint32 base, SPI_endianess endianness, Uint32 address)
{
    Uint32 RXdata = 0;

    CS_LOW;

    // Send the READ4 opcode.
    SPI_transmitByte(base, READ4);

    // Send flash address to read data
    SPI_transmit32Bits(base, address, NO_DELAY);

    // Receive data 32-bit word from flash by sending four dummy bytes
    RXdata = SPI_receive32Bits(base, endianness, DUMMY_DATA, NO_DELAY);

    CS_HIGH;

    return RXdata;
}

如果我在 Code Composer 调试器中加载应用、可以看到参数"base"存储在寄存器"AL"中、参数"endiannems"存储在寄存器"XAR4"中。  但我不确定如何设置参数"address"：

# go to the SPI_read32bits() function
debug_session.memory.writeRegister("PC", 0x8c3e1)

# pass the variables via registers
debug_session.memory.writeRegister("AL", EPPSDefines.SPIB_BASE)             # SPIB_BASE = 0x00006110
debug_session.memory.writeRegister("XAR4", EPPSDefines.SPI_DATA_BIG_ENDIAN) # SPI_DATA_BIG_ENDIAN = 1

我可以看到"SP"寄存器当前是0x40E：

是否可以使用 SP 寄存器值和 memory.writeData ()保存"address"参数值?

sp_value = debug_session.memory.readRegister("SP")
debug_session.memory.writeData(Memory.Page.PROGRAM, ???, 0x40000, 32)

当我逐步执行汇编步骤时、我可以看到如何使用传入的参数更新堆栈：

谢谢！

Diane