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Implement ITM_SendChar().

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Signed-off-by: HiFiPhile <admin@hifiphile.com>
This commit is contained in:
HiFiPhile
2025-03-24 23:06:09 +01:00
parent 3caff80c8e
commit c3a6efc29e
1 changed files with 16 additions and 2 deletions
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18
hw/bsp/board.c
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@@ -64,13 +64,27 @@ int sys_read(int fhdl, char *buf, size_t count) {
#endif
#elif defined(LOGGER_SWO)
#define ITM_BASE 0xE0000000
#define ITM_STIM0 (*((volatile uint8_t*)(ITM_BASE + 0)))
#define ITM_TER *((volatile uint32_t*)(ITM_BASE + 0xE00))
#define ITM_TCR *((volatile uint32_t*)(ITM_BASE + 0xE80))
#define ITM_TCR_ITMENA (1 << 0)
// Logging with SWO for ARM Cortex-M
int sys_write (int fhdl, const char *buf, size_t count) {
(void) fhdl;
uint8_t const* buf8 = (uint8_t const*) buf;
for(size_t i=0; i<count; i++) {
ITM_SendChar(buf8[i]);
if ((ITM_TCR & ITM_TCR_ITMENA) && (ITM_TER & 1ul)) {
for(size_t i=0; i < count; i++) {
while (!(ITM_STIM0 & 1ul)) {
asm("nop");
}
ITM_STIM0 = buf8[i];
}
}
return (int) count;