Robert von Knobloch wrote:
Hello,
I've been trying to decipher the intricacies of in-line assembler (using
the Inline Assembler Cookbook as my guide).
I have a very simple application that I cannot seem to realise.
I want a C function that will return the contents of the RAM address
that I give it as argument.
My assembler-based function looks like this:
file is hex.c
=====
uint8_t get_ram_byte(uint16_t ram_address)
{
uint8_t byte;
asm ("ld __tmp_reg__, %a1" "\n\t"
"sts %0, __tmp_reg__" "\n\t"
: "=&r" (byte) : "e" (ram_address));
return byte;
}
and is called from
rambyte = get_ram_byte(i );
u_hex8out(rambyte); // Print byte as 8-bit hex.
Are you doing this as a learning exercise? If not, why not just use a
bit of C casting?
uint8_t get_ram_byte(uint16_t ram_address)
{
return *(uint8_t *)(ram_address);
}
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