Git-Mirrors/tillitis-key
1
0
Fork 0
mirror of https://github.com/tillitis/tillitis-key1.git synced 2024-12-24 15:09:27 -05:00
Code Issues Packages Projects Releases Wiki Activity

Add needed changes to firmware for simulation.

Browse Source
This commit is contained in:
Jonas Thörnblad 2024-11-25 15:37:19 +01:00 committed by Daniel Jobson
parent fe9055ea23
commit 15ce2c438b
No known key found for this signature in database
GPG Key ID: 3707A9DBF4BB8F1A
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
hw/application_fpga/fw/tk1/main.c
View File

@ -54,7 +54,9 @@ static enum state loading_commands(const struct frame_header *hdr,
const uint8_t *cmd, enum state state,
struct context *ctx);
static void run(const struct context *ctx);
#if !defined(SIMULATION)
static uint32_t xorwow(uint32_t state, uint32_t acc);
#endif
static void scramble_ram(void);
static void print_hw_version(void)
@ -364,6 +366,7 @@ static void run(const struct context *ctx)
__builtin_unreachable();
}
#if !defined(SIMULATION)
static uint32_t xorwow(uint32_t state, uint32_t acc)
{
state ^= state << 13;
@ -372,9 +375,13 @@ static uint32_t xorwow(uint32_t state, uint32_t acc)
state += acc;
return state;
}
#endif
static void scramble_ram(void)
{
// Can't fill RAM if we are simulating, data has already been loaded
// into RAM.
#if !defined(SIMULATION)
uint32_t *ram = (uint32_t *)(TK1_RAM_BASE);
// Fill RAM with random data
@ -386,6 +393,7 @@ static void scramble_ram(void)
data_state = xorwow(data_state, data_acc);
ram[w] = data_state;
}
#endif
// Set RAM address and data scrambling parameters
*ram_addr_rand = rnd_word();
@ -414,6 +422,10 @@ int main(void)
scramble_ram();
#if defined(SIMULATION)
run(&ctx);
#endif
for (;;) {
switch (state) {
case FW_STATE_INITIAL: